diff options
Diffstat (limited to '3rdparty/lua/src/vm_ppcspe.dasc')
| -rw-r--r-- | 3rdparty/lua/src/vm_ppcspe.dasc | 7382 |
1 files changed, 3691 insertions, 3691 deletions
diff --git a/3rdparty/lua/src/vm_ppcspe.dasc b/3rdparty/lua/src/vm_ppcspe.dasc index a484930..293e391 100644 --- a/3rdparty/lua/src/vm_ppcspe.dasc +++ b/3rdparty/lua/src/vm_ppcspe.dasc @@ -1,3691 +1,3691 @@ -|// Low-level VM code for PowerPC/e500 CPUs.
-|// Bytecode interpreter, fast functions and helper functions.
-|// Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
-|
-|.arch ppc
-|.section code_op, code_sub
-|
-|.actionlist build_actionlist
-|.globals GLOB_
-|.globalnames globnames
-|.externnames extnames
-|
-|// Note: The ragged indentation of the instructions is intentional.
-|// The starting columns indicate data dependencies.
-|
-|//-----------------------------------------------------------------------
-|
-|// Fixed register assignments for the interpreter.
-|// Don't use: r1 = sp, r2 and r13 = reserved and/or small data area ptr
-|
-|// The following must be C callee-save (but BASE is often refetched).
-|.define BASE, r14 // Base of current Lua stack frame.
-|.define KBASE, r15 // Constants of current Lua function.
-|.define PC, r16 // Next PC.
-|.define DISPATCH, r17 // Opcode dispatch table.
-|.define LREG, r18 // Register holding lua_State (also in SAVE_L).
-|.define MULTRES, r19 // Size of multi-result: (nresults+1)*8.
-|
-|// Constants for vectorized type-comparisons (hi+low GPR). C callee-save.
-|.define TISNUM, r22
-|.define TISSTR, r23
-|.define TISTAB, r24
-|.define TISFUNC, r25
-|.define TISNIL, r26
-|.define TOBIT, r27
-|.define ZERO, TOBIT // Zero in lo word.
-|
-|// The following temporaries are not saved across C calls, except for RA.
-|.define RA, r20 // Callee-save.
-|.define RB, r10
-|.define RC, r11
-|.define RD, r12
-|.define INS, r7 // Overlaps CARG5.
-|
-|.define TMP0, r0
-|.define TMP1, r8
-|.define TMP2, r9
-|.define TMP3, r6 // Overlaps CARG4.
-|
-|// Saved temporaries.
-|.define SAVE0, r21
-|
-|// Calling conventions.
-|.define CARG1, r3
-|.define CARG2, r4
-|.define CARG3, r5
-|.define CARG4, r6 // Overlaps TMP3.
-|.define CARG5, r7 // Overlaps INS.
-|
-|.define CRET1, r3
-|.define CRET2, r4
-|
-|// Stack layout while in interpreter. Must match with lj_frame.h.
-|.define SAVE_LR, 188(sp)
-|.define CFRAME_SPACE, 184 // Delta for sp.
-|// Back chain for sp: 184(sp) <-- sp entering interpreter
-|.define SAVE_r31, 176(sp) // 64 bit register saves.
-|.define SAVE_r30, 168(sp)
-|.define SAVE_r29, 160(sp)
-|.define SAVE_r28, 152(sp)
-|.define SAVE_r27, 144(sp)
-|.define SAVE_r26, 136(sp)
-|.define SAVE_r25, 128(sp)
-|.define SAVE_r24, 120(sp)
-|.define SAVE_r23, 112(sp)
-|.define SAVE_r22, 104(sp)
-|.define SAVE_r21, 96(sp)
-|.define SAVE_r20, 88(sp)
-|.define SAVE_r19, 80(sp)
-|.define SAVE_r18, 72(sp)
-|.define SAVE_r17, 64(sp)
-|.define SAVE_r16, 56(sp)
-|.define SAVE_r15, 48(sp)
-|.define SAVE_r14, 40(sp)
-|.define SAVE_CR, 36(sp)
-|.define UNUSED1, 32(sp)
-|.define SAVE_ERRF, 28(sp) // 32 bit C frame info.
-|.define SAVE_NRES, 24(sp)
-|.define SAVE_CFRAME, 20(sp)
-|.define SAVE_L, 16(sp)
-|.define SAVE_PC, 12(sp)
-|.define SAVE_MULTRES, 8(sp)
-|// Next frame lr: 4(sp)
-|// Back chain for sp: 0(sp) <-- sp while in interpreter
-|
-|.macro save_, reg; evstdd reg, SAVE_..reg; .endmacro
-|.macro rest_, reg; evldd reg, SAVE_..reg; .endmacro
-|
-|.macro saveregs
-| stwu sp, -CFRAME_SPACE(sp)
-| save_ r14; save_ r15; save_ r16; save_ r17; save_ r18; save_ r19
-| mflr r0; mfcr r12
-| save_ r20; save_ r21; save_ r22; save_ r23; save_ r24; save_ r25
-| stw r0, SAVE_LR; stw r12, SAVE_CR
-| save_ r26; save_ r27; save_ r28; save_ r29; save_ r30; save_ r31
-|.endmacro
-|
-|.macro restoreregs
-| lwz r0, SAVE_LR; lwz r12, SAVE_CR
-| rest_ r14; rest_ r15; rest_ r16; rest_ r17; rest_ r18; rest_ r19
-| mtlr r0; mtcrf 0x38, r12
-| rest_ r20; rest_ r21; rest_ r22; rest_ r23; rest_ r24; rest_ r25
-| rest_ r26; rest_ r27; rest_ r28; rest_ r29; rest_ r30; rest_ r31
-| addi sp, sp, CFRAME_SPACE
-|.endmacro
-|
-|// Type definitions. Some of these are only used for documentation.
-|.type L, lua_State, LREG
-|.type GL, global_State
-|.type TVALUE, TValue
-|.type GCOBJ, GCobj
-|.type STR, GCstr
-|.type TAB, GCtab
-|.type LFUNC, GCfuncL
-|.type CFUNC, GCfuncC
-|.type PROTO, GCproto
-|.type UPVAL, GCupval
-|.type NODE, Node
-|.type NARGS8, int
-|.type TRACE, GCtrace
-|
-|//-----------------------------------------------------------------------
-|
-|// These basic macros should really be part of DynASM.
-|.macro srwi, rx, ry, n; rlwinm rx, ry, 32-n, n, 31; .endmacro
-|.macro slwi, rx, ry, n; rlwinm rx, ry, n, 0, 31-n; .endmacro
-|.macro rotlwi, rx, ry, n; rlwinm rx, ry, n, 0, 31; .endmacro
-|.macro rotlw, rx, ry, rn; rlwnm rx, ry, rn, 0, 31; .endmacro
-|.macro subi, rx, ry, i; addi rx, ry, -i; .endmacro
-|
-|// Trap for not-yet-implemented parts.
-|.macro NYI; tw 4, sp, sp; .endmacro
-|
-|//-----------------------------------------------------------------------
-|
-|// Access to frame relative to BASE.
-|.define FRAME_PC, -8
-|.define FRAME_FUNC, -4
-|
-|// Instruction decode.
-|.macro decode_OP4, dst, ins; rlwinm dst, ins, 2, 22, 29; .endmacro
-|.macro decode_RA8, dst, ins; rlwinm dst, ins, 27, 21, 28; .endmacro
-|.macro decode_RB8, dst, ins; rlwinm dst, ins, 11, 21, 28; .endmacro
-|.macro decode_RC8, dst, ins; rlwinm dst, ins, 19, 21, 28; .endmacro
-|.macro decode_RD8, dst, ins; rlwinm dst, ins, 19, 13, 28; .endmacro
-|
-|.macro decode_OP1, dst, ins; rlwinm dst, ins, 0, 24, 31; .endmacro
-|.macro decode_RD4, dst, ins; rlwinm dst, ins, 18, 14, 29; .endmacro
-|
-|// Instruction fetch.
-|.macro ins_NEXT1
-| lwz INS, 0(PC)
-| addi PC, PC, 4
-|.endmacro
-|// Instruction decode+dispatch.
-|.macro ins_NEXT2
-| decode_OP4 TMP1, INS
-| decode_RB8 RB, INS
-| decode_RD8 RD, INS
-| lwzx TMP0, DISPATCH, TMP1
-| decode_RA8 RA, INS
-| decode_RC8 RC, INS
-| mtctr TMP0
-| bctr
-|.endmacro
-|.macro ins_NEXT
-| ins_NEXT1
-| ins_NEXT2
-|.endmacro
-|
-|// Instruction footer.
-|.if 1
-| // Replicated dispatch. Less unpredictable branches, but higher I-Cache use.
-| .define ins_next, ins_NEXT
-| .define ins_next_, ins_NEXT
-| .define ins_next1, ins_NEXT1
-| .define ins_next2, ins_NEXT2
-|.else
-| // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch.
-| // Affects only certain kinds of benchmarks (and only with -j off).
-| .macro ins_next
-| b ->ins_next
-| .endmacro
-| .macro ins_next1
-| .endmacro
-| .macro ins_next2
-| b ->ins_next
-| .endmacro
-| .macro ins_next_
-| ->ins_next:
-| ins_NEXT
-| .endmacro
-|.endif
-|
-|// Call decode and dispatch.
-|.macro ins_callt
-| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
-| lwz PC, LFUNC:RB->pc
-| lwz INS, 0(PC)
-| addi PC, PC, 4
-| decode_OP4 TMP1, INS
-| decode_RA8 RA, INS
-| lwzx TMP0, DISPATCH, TMP1
-| add RA, RA, BASE
-| mtctr TMP0
-| bctr
-|.endmacro
-|
-|.macro ins_call
-| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC
-| stw PC, FRAME_PC(BASE)
-| ins_callt
-|.endmacro
-|
-|//-----------------------------------------------------------------------
-|
-|// Macros to test operand types.
-|.macro checknum, reg; evcmpltu reg, TISNUM; .endmacro
-|.macro checkstr, reg; evcmpeq reg, TISSTR; .endmacro
-|.macro checktab, reg; evcmpeq reg, TISTAB; .endmacro
-|.macro checkfunc, reg; evcmpeq reg, TISFUNC; .endmacro
-|.macro checknil, reg; evcmpeq reg, TISNIL; .endmacro
-|.macro checkok, label; blt label; .endmacro
-|.macro checkfail, label; bge label; .endmacro
-|.macro checkanyfail, label; bns label; .endmacro
-|.macro checkallok, label; bso label; .endmacro
-|
-|.macro branch_RD
-| srwi TMP0, RD, 1
-| add PC, PC, TMP0
-| addis PC, PC, -(BCBIAS_J*4 >> 16)
-|.endmacro
-|
-|// Assumes DISPATCH is relative to GL.
-#define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field))
-#define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field))
-|
-#define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto))
-|
-|.macro hotloop
-| NYI
-|.endmacro
-|
-|.macro hotcall
-| NYI
-|.endmacro
-|
-|// Set current VM state. Uses TMP0.
-|.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro
-|.macro st_vmstate; stw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro
-|
-|// Move table write barrier back. Overwrites mark and tmp.
-|.macro barrierback, tab, mark, tmp
-| lwz tmp, DISPATCH_GL(gc.grayagain)(DISPATCH)
-| // Assumes LJ_GC_BLACK is 0x04.
-| rlwinm mark, mark, 0, 30, 28 // black2gray(tab)
-| stw tab, DISPATCH_GL(gc.grayagain)(DISPATCH)
-| stb mark, tab->marked
-| stw tmp, tab->gclist
-|.endmacro
-|
-|//-----------------------------------------------------------------------
-
-/* Generate subroutines used by opcodes and other parts of the VM. */
-/* The .code_sub section should be last to help static branch prediction. */
-static void build_subroutines(BuildCtx *ctx)
-{
- |.code_sub
- |
- |//-----------------------------------------------------------------------
- |//-- Return handling ----------------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |->vm_returnp:
- | // See vm_return. Also: TMP2 = previous base.
- | andi. TMP0, PC, FRAME_P
- | evsplati TMP1, LJ_TTRUE
- | beq ->cont_dispatch
- |
- | // Return from pcall or xpcall fast func.
- | lwz PC, FRAME_PC(TMP2) // Fetch PC of previous frame.
- | mr BASE, TMP2 // Restore caller base.
- | // Prepending may overwrite the pcall frame, so do it at the end.
- | stwu TMP1, FRAME_PC(RA) // Prepend true to results.
- |
- |->vm_returnc:
- | addi RD, RD, 8 // RD = (nresults+1)*8.
- | andi. TMP0, PC, FRAME_TYPE
- | cmpwi cr1, RD, 0
- | li CRET1, LUA_YIELD
- | beq cr1, ->vm_unwind_c_eh
- | mr MULTRES, RD
- | beq ->BC_RET_Z // Handle regular return to Lua.
- |
- |->vm_return:
- | // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return
- | // TMP0 = PC & FRAME_TYPE
- | cmpwi TMP0, FRAME_C
- | rlwinm TMP2, PC, 0, 0, 28
- | li_vmstate C
- | sub TMP2, BASE, TMP2 // TMP2 = previous base.
- | bne ->vm_returnp
- |
- | addic. TMP1, RD, -8
- | stw TMP2, L->base
- | lwz TMP2, SAVE_NRES
- | subi BASE, BASE, 8
- | st_vmstate
- | slwi TMP2, TMP2, 3
- | beq >2
- |1:
- | addic. TMP1, TMP1, -8
- | evldd TMP0, 0(RA)
- | addi RA, RA, 8
- | evstdd TMP0, 0(BASE)
- | addi BASE, BASE, 8
- | bne <1
- |
- |2:
- | cmpw TMP2, RD // More/less results wanted?
- | bne >6
- |3:
- | stw BASE, L->top // Store new top.
- |
- |->vm_leave_cp:
- | lwz TMP0, SAVE_CFRAME // Restore previous C frame.
- | li CRET1, 0 // Ok return status for vm_pcall.
- | stw TMP0, L->cframe
- |
- |->vm_leave_unw:
- | restoreregs
- | blr
- |
- |6:
- | ble >7 // Less results wanted?
- | // More results wanted. Check stack size and fill up results with nil.
- | lwz TMP1, L->maxstack
- | cmplw BASE, TMP1
- | bge >8
- | evstdd TISNIL, 0(BASE)
- | addi RD, RD, 8
- | addi BASE, BASE, 8
- | b <2
- |
- |7: // Less results wanted.
- | sub TMP0, RD, TMP2
- | cmpwi TMP2, 0 // LUA_MULTRET+1 case?
- | sub TMP0, BASE, TMP0 // Subtract the difference.
- | iseleq BASE, BASE, TMP0 // Either keep top or shrink it.
- | b <3
- |
- |8: // Corner case: need to grow stack for filling up results.
- | // This can happen if:
- | // - A C function grows the stack (a lot).
- | // - The GC shrinks the stack in between.
- | // - A return back from a lua_call() with (high) nresults adjustment.
- | stw BASE, L->top // Save current top held in BASE (yes).
- | mr SAVE0, RD
- | mr CARG2, TMP2
- | mr CARG1, L
- | bl extern lj_state_growstack // (lua_State *L, int n)
- | lwz TMP2, SAVE_NRES
- | mr RD, SAVE0
- | slwi TMP2, TMP2, 3
- | lwz BASE, L->top // Need the (realloced) L->top in BASE.
- | b <2
- |
- |->vm_unwind_c: // Unwind C stack, return from vm_pcall.
- | // (void *cframe, int errcode)
- | mr sp, CARG1
- | mr CRET1, CARG2
- |->vm_unwind_c_eh: // Landing pad for external unwinder.
- | lwz L, SAVE_L
- | li TMP0, ~LJ_VMST_C
- | lwz GL:TMP1, L->glref
- | stw TMP0, GL:TMP1->vmstate
- | b ->vm_leave_unw
- |
- |->vm_unwind_ff: // Unwind C stack, return from ff pcall.
- | // (void *cframe)
- | rlwinm sp, CARG1, 0, 0, 29
- |->vm_unwind_ff_eh: // Landing pad for external unwinder.
- | lwz L, SAVE_L
- | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants.
- | evsplati TISFUNC, LJ_TFUNC
- | lus TOBIT, 0x4338
- | evsplati TISTAB, LJ_TTAB
- | li TMP0, 0
- | lwz BASE, L->base
- | evmergelo TOBIT, TOBIT, TMP0
- | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
- | evsplati TISSTR, LJ_TSTR
- | li TMP1, LJ_TFALSE
- | evsplati TISNIL, LJ_TNIL
- | li_vmstate INTERP
- | lwz PC, FRAME_PC(BASE) // Fetch PC of previous frame.
- | la RA, -8(BASE) // Results start at BASE-8.
- | addi DISPATCH, DISPATCH, GG_G2DISP
- | stw TMP1, 0(RA) // Prepend false to error message.
- | li RD, 16 // 2 results: false + error message.
- | st_vmstate
- | b ->vm_returnc
- |
- |//-----------------------------------------------------------------------
- |//-- Grow stack for calls -----------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |->vm_growstack_c: // Grow stack for C function.
- | li CARG2, LUA_MINSTACK
- | b >2
- |
- |->vm_growstack_l: // Grow stack for Lua function.
- | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC
- | add RC, BASE, RC
- | sub RA, RA, BASE
- | stw BASE, L->base
- | addi PC, PC, 4 // Must point after first instruction.
- | stw RC, L->top
- | srwi CARG2, RA, 3
- |2:
- | // L->base = new base, L->top = top
- | stw PC, SAVE_PC
- | mr CARG1, L
- | bl extern lj_state_growstack // (lua_State *L, int n)
- | lwz BASE, L->base
- | lwz RC, L->top
- | lwz LFUNC:RB, FRAME_FUNC(BASE)
- | sub RC, RC, BASE
- | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
- | ins_callt // Just retry the call.
- |
- |//-----------------------------------------------------------------------
- |//-- Entry points into the assembler VM ---------------------------------
- |//-----------------------------------------------------------------------
- |
- |->vm_resume: // Setup C frame and resume thread.
- | // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0)
- | saveregs
- | mr L, CARG1
- | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
- | mr BASE, CARG2
- | lbz TMP1, L->status
- | stw L, SAVE_L
- | li PC, FRAME_CP
- | addi TMP0, sp, CFRAME_RESUME
- | addi DISPATCH, DISPATCH, GG_G2DISP
- | stw CARG3, SAVE_NRES
- | cmplwi TMP1, 0
- | stw CARG3, SAVE_ERRF
- | stw TMP0, L->cframe
- | stw CARG3, SAVE_CFRAME
- | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
- | beq >3
- |
- | // Resume after yield (like a return).
- | mr RA, BASE
- | lwz BASE, L->base
- | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants.
- | lwz TMP1, L->top
- | evsplati TISFUNC, LJ_TFUNC
- | lus TOBIT, 0x4338
- | evsplati TISTAB, LJ_TTAB
- | lwz PC, FRAME_PC(BASE)
- | li TMP2, 0
- | evsplati TISSTR, LJ_TSTR
- | sub RD, TMP1, BASE
- | evmergelo TOBIT, TOBIT, TMP2
- | stb CARG3, L->status
- | andi. TMP0, PC, FRAME_TYPE
- | li_vmstate INTERP
- | addi RD, RD, 8
- | evsplati TISNIL, LJ_TNIL
- | mr MULTRES, RD
- | st_vmstate
- | beq ->BC_RET_Z
- | b ->vm_return
- |
- |->vm_pcall: // Setup protected C frame and enter VM.
- | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef)
- | saveregs
- | li PC, FRAME_CP
- | stw CARG4, SAVE_ERRF
- | b >1
- |
- |->vm_call: // Setup C frame and enter VM.
- | // (lua_State *L, TValue *base, int nres1)
- | saveregs
- | li PC, FRAME_C
- |
- |1: // Entry point for vm_pcall above (PC = ftype).
- | lwz TMP1, L:CARG1->cframe
- | stw CARG3, SAVE_NRES
- | mr L, CARG1
- | stw CARG1, SAVE_L
- | mr BASE, CARG2
- | stw sp, L->cframe // Add our C frame to cframe chain.
- | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
- | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
- | stw TMP1, SAVE_CFRAME
- | addi DISPATCH, DISPATCH, GG_G2DISP
- |
- |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
- | lwz TMP2, L->base // TMP2 = old base (used in vmeta_call).
- | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants.
- | lwz TMP1, L->top
- | evsplati TISFUNC, LJ_TFUNC
- | add PC, PC, BASE
- | evsplati TISTAB, LJ_TTAB
- | lus TOBIT, 0x4338
- | li TMP0, 0
- | sub PC, PC, TMP2 // PC = frame delta + frame type
- | evsplati TISSTR, LJ_TSTR
- | sub NARGS8:RC, TMP1, BASE
- | evmergelo TOBIT, TOBIT, TMP0
- | li_vmstate INTERP
- | evsplati TISNIL, LJ_TNIL
- | st_vmstate
- |
- |->vm_call_dispatch:
- | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC
- | li TMP0, -8
- | evlddx LFUNC:RB, BASE, TMP0
- | checkfunc LFUNC:RB
- | checkfail ->vmeta_call
- |
- |->vm_call_dispatch_f:
- | ins_call
- | // BASE = new base, RB = func, RC = nargs*8, PC = caller PC
- |
- |->vm_cpcall: // Setup protected C frame, call C.
- | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp)
- | saveregs
- | mr L, CARG1
- | lwz TMP0, L:CARG1->stack
- | stw CARG1, SAVE_L
- | lwz TMP1, L->top
- | stw CARG1, SAVE_PC // Any value outside of bytecode is ok.
- | sub TMP0, TMP0, TMP1 // Compute -savestack(L, L->top).
- | lwz TMP1, L->cframe
- | stw sp, L->cframe // Add our C frame to cframe chain.
- | li TMP2, 0
- | stw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame.
- | stw TMP2, SAVE_ERRF // No error function.
- | stw TMP1, SAVE_CFRAME
- | mtctr CARG4
- | bctrl // (lua_State *L, lua_CFunction func, void *ud)
- | mr. BASE, CRET1
- | lwz DISPATCH, L->glref // Setup pointer to dispatch table.
- | li PC, FRAME_CP
- | addi DISPATCH, DISPATCH, GG_G2DISP
- | bne <3 // Else continue with the call.
- | b ->vm_leave_cp // No base? Just remove C frame.
- |
- |//-----------------------------------------------------------------------
- |//-- Metamethod handling ------------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the
- |// stack, so BASE doesn't need to be reloaded across these calls.
- |
- |//-- Continuation dispatch ----------------------------------------------
- |
- |->cont_dispatch:
- | // BASE = meta base, RA = resultptr, RD = (nresults+1)*8
- | lwz TMP0, -12(BASE) // Continuation.
- | mr RB, BASE
- | mr BASE, TMP2 // Restore caller BASE.
- | lwz LFUNC:TMP1, FRAME_FUNC(TMP2)
- | cmplwi TMP0, 0
- | lwz PC, -16(RB) // Restore PC from [cont|PC].
- | beq >1
- | subi TMP2, RD, 8
- | lwz TMP1, LFUNC:TMP1->pc
- | evstddx TISNIL, RA, TMP2 // Ensure one valid arg.
- | lwz KBASE, PC2PROTO(k)(TMP1)
- | // BASE = base, RA = resultptr, RB = meta base
- | mtctr TMP0
- | bctr // Jump to continuation.
- |
- |1: // Tail call from C function.
- | subi TMP1, RB, 16
- | sub RC, TMP1, BASE
- | b ->vm_call_tail
- |
- |->cont_cat: // RA = resultptr, RB = meta base
- | lwz INS, -4(PC)
- | subi CARG2, RB, 16
- | decode_RB8 SAVE0, INS
- | evldd TMP0, 0(RA)
- | add TMP1, BASE, SAVE0
- | stw BASE, L->base
- | cmplw TMP1, CARG2
- | sub CARG3, CARG2, TMP1
- | decode_RA8 RA, INS
- | evstdd TMP0, 0(CARG2)
- | bne ->BC_CAT_Z
- | evstddx TMP0, BASE, RA
- | b ->cont_nop
- |
- |//-- Table indexing metamethods -----------------------------------------
- |
- |->vmeta_tgets1:
- | evmergelo STR:RC, TISSTR, STR:RC
- | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
- | decode_RB8 RB, INS
- | evstdd STR:RC, 0(CARG3)
- | add CARG2, BASE, RB
- | b >1
- |
- |->vmeta_tgets:
- | evmergelo TAB:RB, TISTAB, TAB:RB
- | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
- | evmergelo STR:RC, TISSTR, STR:RC
- | evstdd TAB:RB, 0(CARG2)
- | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
- | evstdd STR:RC, 0(CARG3)
- | b >1
- |
- |->vmeta_tgetb: // TMP0 = index
- | efdcfsi TMP0, TMP0
- | decode_RB8 RB, INS
- | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
- | add CARG2, BASE, RB
- | evstdd TMP0, 0(CARG3)
- | b >1
- |
- |->vmeta_tgetv:
- | decode_RB8 RB, INS
- | decode_RC8 RC, INS
- | add CARG2, BASE, RB
- | add CARG3, BASE, RC
- |1:
- | stw BASE, L->base
- | mr CARG1, L
- | stw PC, SAVE_PC
- | bl extern lj_meta_tget // (lua_State *L, TValue *o, TValue *k)
- | // Returns TValue * (finished) or NULL (metamethod).
- | cmplwi CRET1, 0
- | beq >3
- | evldd TMP0, 0(CRET1)
- | evstddx TMP0, BASE, RA
- | ins_next
- |
- |3: // Call __index metamethod.
- | // BASE = base, L->top = new base, stack = cont/func/t/k
- | subfic TMP1, BASE, FRAME_CONT
- | lwz BASE, L->top
- | stw PC, -16(BASE) // [cont|PC]
- | add PC, TMP1, BASE
- | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
- | li NARGS8:RC, 16 // 2 args for func(t, k).
- | b ->vm_call_dispatch_f
- |
- |//-----------------------------------------------------------------------
- |
- |->vmeta_tsets1:
- | evmergelo STR:RC, TISSTR, STR:RC
- | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
- | decode_RB8 RB, INS
- | evstdd STR:RC, 0(CARG3)
- | add CARG2, BASE, RB
- | b >1
- |
- |->vmeta_tsets:
- | evmergelo TAB:RB, TISTAB, TAB:RB
- | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
- | evmergelo STR:RC, TISSTR, STR:RC
- | evstdd TAB:RB, 0(CARG2)
- | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
- | evstdd STR:RC, 0(CARG3)
- | b >1
- |
- |->vmeta_tsetb: // TMP0 = index
- | efdcfsi TMP0, TMP0
- | decode_RB8 RB, INS
- | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
- | add CARG2, BASE, RB
- | evstdd TMP0, 0(CARG3)
- | b >1
- |
- |->vmeta_tsetv:
- | decode_RB8 RB, INS
- | decode_RC8 RC, INS
- | add CARG2, BASE, RB
- | add CARG3, BASE, RC
- |1:
- | stw BASE, L->base
- | mr CARG1, L
- | stw PC, SAVE_PC
- | bl extern lj_meta_tset // (lua_State *L, TValue *o, TValue *k)
- | // Returns TValue * (finished) or NULL (metamethod).
- | cmplwi CRET1, 0
- | evlddx TMP0, BASE, RA
- | beq >3
- | // NOBARRIER: lj_meta_tset ensures the table is not black.
- | evstdd TMP0, 0(CRET1)
- | ins_next
- |
- |3: // Call __newindex metamethod.
- | // BASE = base, L->top = new base, stack = cont/func/t/k/(v)
- | subfic TMP1, BASE, FRAME_CONT
- | lwz BASE, L->top
- | stw PC, -16(BASE) // [cont|PC]
- | add PC, TMP1, BASE
- | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
- | li NARGS8:RC, 24 // 3 args for func(t, k, v)
- | evstdd TMP0, 16(BASE) // Copy value to third argument.
- | b ->vm_call_dispatch_f
- |
- |//-- Comparison metamethods ---------------------------------------------
- |
- |->vmeta_comp:
- | mr CARG1, L
- | subi PC, PC, 4
- | add CARG2, BASE, RA
- | stw PC, SAVE_PC
- | add CARG3, BASE, RD
- | stw BASE, L->base
- | decode_OP1 CARG4, INS
- | bl extern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op)
- | // Returns 0/1 or TValue * (metamethod).
- |3:
- | cmplwi CRET1, 1
- | bgt ->vmeta_binop
- |4:
- | lwz INS, 0(PC)
- | addi PC, PC, 4
- | decode_RD4 TMP2, INS
- | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
- | add TMP2, TMP2, TMP3
- | isellt PC, PC, TMP2
- |->cont_nop:
- | ins_next
- |
- |->cont_ra: // RA = resultptr
- | lwz INS, -4(PC)
- | evldd TMP0, 0(RA)
- | decode_RA8 TMP1, INS
- | evstddx TMP0, BASE, TMP1
- | b ->cont_nop
- |
- |->cont_condt: // RA = resultptr
- | lwz TMP0, 0(RA)
- | li TMP1, LJ_TTRUE
- | cmplw TMP1, TMP0 // Branch if result is true.
- | b <4
- |
- |->cont_condf: // RA = resultptr
- | lwz TMP0, 0(RA)
- | li TMP1, LJ_TFALSE
- | cmplw TMP0, TMP1 // Branch if result is false.
- | b <4
- |
- |->vmeta_equal:
- | // CARG2, CARG3, CARG4 are already set by BC_ISEQV/BC_ISNEV.
- | subi PC, PC, 4
- | stw BASE, L->base
- | mr CARG1, L
- | stw PC, SAVE_PC
- | bl extern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne)
- | // Returns 0/1 or TValue * (metamethod).
- | b <3
- |
- |//-- Arithmetic metamethods ---------------------------------------------
- |
- |->vmeta_arith_vn:
- | add CARG3, BASE, RB
- | add CARG4, KBASE, RC
- | b >1
- |
- |->vmeta_arith_nv:
- | add CARG3, KBASE, RC
- | add CARG4, BASE, RB
- | b >1
- |
- |->vmeta_unm:
- | add CARG3, BASE, RD
- | mr CARG4, CARG3
- | b >1
- |
- |->vmeta_arith_vv:
- | add CARG3, BASE, RB
- | add CARG4, BASE, RC
- |1:
- | add CARG2, BASE, RA
- | stw BASE, L->base
- | mr CARG1, L
- | stw PC, SAVE_PC
- | decode_OP1 CARG5, INS // Caveat: CARG5 overlaps INS.
- | bl extern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op)
- | // Returns NULL (finished) or TValue * (metamethod).
- | cmplwi CRET1, 0
- | beq ->cont_nop
- |
- | // Call metamethod for binary op.
- |->vmeta_binop:
- | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2
- | sub TMP1, CRET1, BASE
- | stw PC, -16(CRET1) // [cont|PC]
- | mr TMP2, BASE
- | addi PC, TMP1, FRAME_CONT
- | mr BASE, CRET1
- | li NARGS8:RC, 16 // 2 args for func(o1, o2).
- | b ->vm_call_dispatch
- |
- |->vmeta_len:
-#if LJ_52
- | mr SAVE0, CARG1
-#endif
- | add CARG2, BASE, RD
- | stw BASE, L->base
- | mr CARG1, L
- | stw PC, SAVE_PC
- | bl extern lj_meta_len // (lua_State *L, TValue *o)
- | // Returns NULL (retry) or TValue * (metamethod base).
-#if LJ_52
- | cmplwi CRET1, 0
- | bne ->vmeta_binop // Binop call for compatibility.
- | mr CARG1, SAVE0
- | b ->BC_LEN_Z
-#else
- | b ->vmeta_binop // Binop call for compatibility.
-#endif
- |
- |//-- Call metamethod ----------------------------------------------------
- |
- |->vmeta_call: // Resolve and call __call metamethod.
- | // TMP2 = old base, BASE = new base, RC = nargs*8
- | mr CARG1, L
- | stw TMP2, L->base // This is the callers base!
- | subi CARG2, BASE, 8
- | stw PC, SAVE_PC
- | add CARG3, BASE, RC
- | mr SAVE0, NARGS8:RC
- | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
- | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here.
- | addi NARGS8:RC, SAVE0, 8 // Got one more argument now.
- | ins_call
- |
- |->vmeta_callt: // Resolve __call for BC_CALLT.
- | // BASE = old base, RA = new base, RC = nargs*8
- | mr CARG1, L
- | stw BASE, L->base
- | subi CARG2, RA, 8
- | stw PC, SAVE_PC
- | add CARG3, RA, RC
- | mr SAVE0, NARGS8:RC
- | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top)
- | lwz TMP1, FRAME_PC(BASE)
- | addi NARGS8:RC, SAVE0, 8 // Got one more argument now.
- | lwz LFUNC:RB, FRAME_FUNC(RA) // Guaranteed to be a function here.
- | b ->BC_CALLT_Z
- |
- |//-- Argument coercion for 'for' statement ------------------------------
- |
- |->vmeta_for:
- | mr CARG1, L
- | stw BASE, L->base
- | mr CARG2, RA
- | stw PC, SAVE_PC
- | mr SAVE0, INS
- | bl extern lj_meta_for // (lua_State *L, TValue *base)
- |.if JIT
- | decode_OP1 TMP0, SAVE0
- |.endif
- | decode_RA8 RA, SAVE0
- |.if JIT
- | cmpwi TMP0, BC_JFORI
- |.endif
- | decode_RD8 RD, SAVE0
- |.if JIT
- | beq =>BC_JFORI
- |.endif
- | b =>BC_FORI
- |
- |//-----------------------------------------------------------------------
- |//-- Fast functions -----------------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |.macro .ffunc, name
- |->ff_ .. name:
- |.endmacro
- |
- |.macro .ffunc_1, name
- |->ff_ .. name:
- | cmplwi NARGS8:RC, 8
- | evldd CARG1, 0(BASE)
- | blt ->fff_fallback
- |.endmacro
- |
- |.macro .ffunc_2, name
- |->ff_ .. name:
- | cmplwi NARGS8:RC, 16
- | evldd CARG1, 0(BASE)
- | evldd CARG2, 8(BASE)
- | blt ->fff_fallback
- |.endmacro
- |
- |.macro .ffunc_n, name
- | .ffunc_1 name
- | checknum CARG1
- | checkfail ->fff_fallback
- |.endmacro
- |
- |.macro .ffunc_nn, name
- | .ffunc_2 name
- | evmergehi TMP0, CARG1, CARG2
- | checknum TMP0
- | checkanyfail ->fff_fallback
- |.endmacro
- |
- |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1.
- |.macro ffgccheck
- | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
- | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
- | cmplw TMP0, TMP1
- | bgel ->fff_gcstep
- |.endmacro
- |
- |//-- Base library: checks -----------------------------------------------
- |
- |.ffunc assert
- | cmplwi NARGS8:RC, 8
- | evldd TMP0, 0(BASE)
- | blt ->fff_fallback
- | evaddw TMP1, TISNIL, TISNIL // Synthesize LJ_TFALSE.
- | la RA, -8(BASE)
- | evcmpltu cr1, TMP0, TMP1
- | lwz PC, FRAME_PC(BASE)
- | bge cr1, ->fff_fallback
- | evstdd TMP0, 0(RA)
- | addi RD, NARGS8:RC, 8 // Compute (nresults+1)*8.
- | beq ->fff_res // Done if exactly 1 argument.
- | li TMP1, 8
- | subi RC, RC, 8
- |1:
- | cmplw TMP1, RC
- | evlddx TMP0, BASE, TMP1
- | evstddx TMP0, RA, TMP1
- | addi TMP1, TMP1, 8
- | bne <1
- | b ->fff_res
- |
- |.ffunc type
- | cmplwi NARGS8:RC, 8
- | lwz CARG1, 0(BASE)
- | blt ->fff_fallback
- | li TMP2, ~LJ_TNUMX
- | cmplw CARG1, TISNUM
- | not TMP1, CARG1
- | isellt TMP1, TMP2, TMP1
- | slwi TMP1, TMP1, 3
- | la TMP2, CFUNC:RB->upvalue
- | evlddx STR:CRET1, TMP2, TMP1
- | b ->fff_restv
- |
- |//-- Base library: getters and setters ---------------------------------
- |
- |.ffunc_1 getmetatable
- | checktab CARG1
- | evmergehi TMP1, CARG1, CARG1
- | checkfail >6
- |1: // Field metatable must be at same offset for GCtab and GCudata!
- | lwz TAB:RB, TAB:CARG1->metatable
- |2:
- | evmr CRET1, TISNIL
- | cmplwi TAB:RB, 0
- | lwz STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH)
- | beq ->fff_restv
- | lwz TMP0, TAB:RB->hmask
- | evmergelo CRET1, TISTAB, TAB:RB // Use metatable as default result.
- | lwz TMP1, STR:RC->hash
- | lwz NODE:TMP2, TAB:RB->node
- | evmergelo STR:RC, TISSTR, STR:RC
- | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
- | slwi TMP0, TMP1, 5
- | slwi TMP1, TMP1, 3
- | sub TMP1, TMP0, TMP1
- | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
- |3: // Rearranged logic, because we expect _not_ to find the key.
- | evldd TMP0, NODE:TMP2->key
- | evldd TMP1, NODE:TMP2->val
- | evcmpeq TMP0, STR:RC
- | lwz NODE:TMP2, NODE:TMP2->next
- | checkallok >5
- | cmplwi NODE:TMP2, 0
- | beq ->fff_restv // Not found, keep default result.
- | b <3
- |5:
- | checknil TMP1
- | checkok ->fff_restv // Ditto for nil value.
- | evmr CRET1, TMP1 // Return value of mt.__metatable.
- | b ->fff_restv
- |
- |6:
- | cmpwi TMP1, LJ_TUDATA
- | not TMP1, TMP1
- | beq <1
- | checknum CARG1
- | slwi TMP1, TMP1, 2
- | li TMP2, 4*~LJ_TNUMX
- | isellt TMP1, TMP2, TMP1
- | la TMP2, DISPATCH_GL(gcroot[GCROOT_BASEMT])(DISPATCH)
- | lwzx TAB:RB, TMP2, TMP1
- | b <2
- |
- |.ffunc_2 setmetatable
- | // Fast path: no mt for table yet and not clearing the mt.
- | evmergehi TMP0, TAB:CARG1, TAB:CARG2
- | checktab TMP0
- | checkanyfail ->fff_fallback
- | lwz TAB:TMP1, TAB:CARG1->metatable
- | cmplwi TAB:TMP1, 0
- | lbz TMP3, TAB:CARG1->marked
- | bne ->fff_fallback
- | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
- | stw TAB:CARG2, TAB:CARG1->metatable
- | beq ->fff_restv
- | barrierback TAB:CARG1, TMP3, TMP0
- | b ->fff_restv
- |
- |.ffunc rawget
- | cmplwi NARGS8:RC, 16
- | evldd CARG2, 0(BASE)
- | blt ->fff_fallback
- | checktab CARG2
- | la CARG3, 8(BASE)
- | checkfail ->fff_fallback
- | mr CARG1, L
- | bl extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key)
- | // Returns cTValue *.
- | evldd CRET1, 0(CRET1)
- | b ->fff_restv
- |
- |//-- Base library: conversions ------------------------------------------
- |
- |.ffunc tonumber
- | // Only handles the number case inline (without a base argument).
- | cmplwi NARGS8:RC, 8
- | evldd CARG1, 0(BASE)
- | bne ->fff_fallback // Exactly one argument.
- | checknum CARG1
- | checkok ->fff_restv
- | b ->fff_fallback
- |
- |.ffunc_1 tostring
- | // Only handles the string or number case inline.
- | checkstr CARG1
- | // A __tostring method in the string base metatable is ignored.
- | checkok ->fff_restv // String key?
- | // Handle numbers inline, unless a number base metatable is present.
- | lwz TMP0, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH)
- | checknum CARG1
- | cmplwi cr1, TMP0, 0
- | stw BASE, L->base // Add frame since C call can throw.
- | crand 4*cr0+eq, 4*cr0+lt, 4*cr1+eq
- | stw PC, SAVE_PC // Redundant (but a defined value).
- | bne ->fff_fallback
- | ffgccheck
- | mr CARG1, L
- | mr CARG2, BASE
- | bl extern lj_str_fromnum // (lua_State *L, lua_Number *np)
- | // Returns GCstr *.
- | evmergelo STR:CRET1, TISSTR, STR:CRET1
- | b ->fff_restv
- |
- |//-- Base library: iterators -------------------------------------------
- |
- |.ffunc next
- | cmplwi NARGS8:RC, 8
- | evldd CARG2, 0(BASE)
- | blt ->fff_fallback
- | evstddx TISNIL, BASE, NARGS8:RC // Set missing 2nd arg to nil.
- | checktab TAB:CARG2
- | lwz PC, FRAME_PC(BASE)
- | checkfail ->fff_fallback
- | stw BASE, L->base // Add frame since C call can throw.
- | mr CARG1, L
- | stw BASE, L->top // Dummy frame length is ok.
- | la CARG3, 8(BASE)
- | stw PC, SAVE_PC
- | bl extern lj_tab_next // (lua_State *L, GCtab *t, TValue *key)
- | // Returns 0 at end of traversal.
- | cmplwi CRET1, 0
- | evmr CRET1, TISNIL
- | beq ->fff_restv // End of traversal: return nil.
- | evldd TMP0, 8(BASE) // Copy key and value to results.
- | la RA, -8(BASE)
- | evldd TMP1, 16(BASE)
- | evstdd TMP0, 0(RA)
- | li RD, (2+1)*8
- | evstdd TMP1, 8(RA)
- | b ->fff_res
- |
- |.ffunc_1 pairs
- | checktab TAB:CARG1
- | lwz PC, FRAME_PC(BASE)
- | checkfail ->fff_fallback
-#if LJ_52
- | lwz TAB:TMP2, TAB:CARG1->metatable
- | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0]
- | cmplwi TAB:TMP2, 0
- | la RA, -8(BASE)
- | bne ->fff_fallback
-#else
- | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0]
- | la RA, -8(BASE)
-#endif
- | evstdd TISNIL, 8(BASE)
- | li RD, (3+1)*8
- | evstdd CFUNC:TMP0, 0(RA)
- | b ->fff_res
- |
- |.ffunc_2 ipairs_aux
- | checktab TAB:CARG1
- | lwz PC, FRAME_PC(BASE)
- | checkfail ->fff_fallback
- | checknum CARG2
- | lus TMP3, 0x3ff0
- | checkfail ->fff_fallback
- | efdctsi TMP2, CARG2
- | lwz TMP0, TAB:CARG1->asize
- | evmergelo TMP3, TMP3, ZERO
- | lwz TMP1, TAB:CARG1->array
- | efdadd CARG2, CARG2, TMP3
- | addi TMP2, TMP2, 1
- | la RA, -8(BASE)
- | cmplw TMP0, TMP2
- | slwi TMP3, TMP2, 3
- | evstdd CARG2, 0(RA)
- | ble >2 // Not in array part?
- | evlddx TMP1, TMP1, TMP3
- |1:
- | checknil TMP1
- | li RD, (0+1)*8
- | checkok ->fff_res // End of iteration, return 0 results.
- | li RD, (2+1)*8
- | evstdd TMP1, 8(RA)
- | b ->fff_res
- |2: // Check for empty hash part first. Otherwise call C function.
- | lwz TMP0, TAB:CARG1->hmask
- | cmplwi TMP0, 0
- | li RD, (0+1)*8
- | beq ->fff_res
- | mr CARG2, TMP2
- | bl extern lj_tab_getinth // (GCtab *t, int32_t key)
- | // Returns cTValue * or NULL.
- | cmplwi CRET1, 0
- | li RD, (0+1)*8
- | beq ->fff_res
- | evldd TMP1, 0(CRET1)
- | b <1
- |
- |.ffunc_1 ipairs
- | checktab TAB:CARG1
- | lwz PC, FRAME_PC(BASE)
- | checkfail ->fff_fallback
-#if LJ_52
- | lwz TAB:TMP2, TAB:CARG1->metatable
- | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0]
- | cmplwi TAB:TMP2, 0
- | la RA, -8(BASE)
- | bne ->fff_fallback
-#else
- | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0]
- | la RA, -8(BASE)
-#endif
- | evsplati TMP1, 0
- | li RD, (3+1)*8
- | evstdd TMP1, 8(BASE)
- | evstdd CFUNC:TMP0, 0(RA)
- | b ->fff_res
- |
- |//-- Base library: catch errors ----------------------------------------
- |
- |.ffunc pcall
- | cmplwi NARGS8:RC, 8
- | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
- | blt ->fff_fallback
- | mr TMP2, BASE
- | la BASE, 8(BASE)
- | // Remember active hook before pcall.
- | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31
- | subi NARGS8:RC, NARGS8:RC, 8
- | addi PC, TMP3, 8+FRAME_PCALL
- | b ->vm_call_dispatch
- |
- |.ffunc_2 xpcall
- | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
- | mr TMP2, BASE
- | checkfunc CARG2 // Traceback must be a function.
- | checkfail ->fff_fallback
- | la BASE, 16(BASE)
- | // Remember active hook before pcall.
- | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31
- | evstdd CARG2, 0(TMP2) // Swap function and traceback.
- | subi NARGS8:RC, NARGS8:RC, 16
- | evstdd CARG1, 8(TMP2)
- | addi PC, TMP3, 16+FRAME_PCALL
- | b ->vm_call_dispatch
- |
- |//-- Coroutine library --------------------------------------------------
- |
- |.macro coroutine_resume_wrap, resume
- |.if resume
- |.ffunc_1 coroutine_resume
- | evmergehi TMP0, L:CARG1, L:CARG1
- |.else
- |.ffunc coroutine_wrap_aux
- | lwz L:CARG1, CFUNC:RB->upvalue[0].gcr
- |.endif
- |.if resume
- | cmpwi TMP0, LJ_TTHREAD
- | bne ->fff_fallback
- |.endif
- | lbz TMP0, L:CARG1->status
- | lwz TMP1, L:CARG1->cframe
- | lwz CARG2, L:CARG1->top
- | cmplwi cr0, TMP0, LUA_YIELD
- | lwz TMP2, L:CARG1->base
- | cmplwi cr1, TMP1, 0
- | lwz TMP0, L:CARG1->maxstack
- | cmplw cr7, CARG2, TMP2
- | lwz PC, FRAME_PC(BASE)
- | crorc 4*cr6+lt, 4*cr0+gt, 4*cr1+eq // st>LUA_YIELD || cframe!=0
- | add TMP2, CARG2, NARGS8:RC
- | crandc 4*cr6+gt, 4*cr7+eq, 4*cr0+eq // base==top && st!=LUA_YIELD
- | cmplw cr1, TMP2, TMP0
- | cror 4*cr6+lt, 4*cr6+lt, 4*cr6+gt
- | stw PC, SAVE_PC
- | cror 4*cr6+lt, 4*cr6+lt, 4*cr1+gt // cond1 || cond2 || stackov
- | stw BASE, L->base
- | blt cr6, ->fff_fallback
- |1:
- |.if resume
- | addi BASE, BASE, 8 // Keep resumed thread in stack for GC.
- | subi NARGS8:RC, NARGS8:RC, 8
- | subi TMP2, TMP2, 8
- |.endif
- | stw TMP2, L:CARG1->top
- | li TMP1, 0
- | stw BASE, L->top
- |2: // Move args to coroutine.
- | cmpw TMP1, NARGS8:RC
- | evlddx TMP0, BASE, TMP1
- | beq >3
- | evstddx TMP0, CARG2, TMP1
- | addi TMP1, TMP1, 8
- | b <2
- |3:
- | li CARG3, 0
- | mr L:SAVE0, L:CARG1
- | li CARG4, 0
- | bl ->vm_resume // (lua_State *L, TValue *base, 0, 0)
- | // Returns thread status.
- |4:
- | lwz TMP2, L:SAVE0->base
- | cmplwi CRET1, LUA_YIELD
- | lwz TMP3, L:SAVE0->top
- | li_vmstate INTERP
- | lwz BASE, L->base
- | st_vmstate
- | bgt >8
- | sub RD, TMP3, TMP2
- | lwz TMP0, L->maxstack
- | cmplwi RD, 0
- | add TMP1, BASE, RD
- | beq >6 // No results?
- | cmplw TMP1, TMP0
- | li TMP1, 0
- | bgt >9 // Need to grow stack?
- |
- | subi TMP3, RD, 8
- | stw TMP2, L:SAVE0->top // Clear coroutine stack.
- |5: // Move results from coroutine.
- | cmplw TMP1, TMP3
- | evlddx TMP0, TMP2, TMP1
- | evstddx TMP0, BASE, TMP1
- | addi TMP1, TMP1, 8
- | bne <5
- |6:
- | andi. TMP0, PC, FRAME_TYPE
- |.if resume
- | li TMP1, LJ_TTRUE
- | la RA, -8(BASE)
- | stw TMP1, -8(BASE) // Prepend true to results.
- | addi RD, RD, 16
- |.else
- | mr RA, BASE
- | addi RD, RD, 8
- |.endif
- |7:
- | stw PC, SAVE_PC
- | mr MULTRES, RD
- | beq ->BC_RET_Z
- | b ->vm_return
- |
- |8: // Coroutine returned with error (at co->top-1).
- |.if resume
- | andi. TMP0, PC, FRAME_TYPE
- | la TMP3, -8(TMP3)
- | li TMP1, LJ_TFALSE
- | evldd TMP0, 0(TMP3)
- | stw TMP3, L:SAVE0->top // Remove error from coroutine stack.
- | li RD, (2+1)*8
- | stw TMP1, -8(BASE) // Prepend false to results.
- | la RA, -8(BASE)
- | evstdd TMP0, 0(BASE) // Copy error message.
- | b <7
- |.else
- | mr CARG1, L
- | mr CARG2, L:SAVE0
- | bl extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co)
- |.endif
- |
- |9: // Handle stack expansion on return from yield.
- | mr CARG1, L
- | srwi CARG2, RD, 3
- | bl extern lj_state_growstack // (lua_State *L, int n)
- | li CRET1, 0
- | b <4
- |.endmacro
- |
- | coroutine_resume_wrap 1 // coroutine.resume
- | coroutine_resume_wrap 0 // coroutine.wrap
- |
- |.ffunc coroutine_yield
- | lwz TMP0, L->cframe
- | add TMP1, BASE, NARGS8:RC
- | stw BASE, L->base
- | andi. TMP0, TMP0, CFRAME_RESUME
- | stw TMP1, L->top
- | li CRET1, LUA_YIELD
- | beq ->fff_fallback
- | stw ZERO, L->cframe
- | stb CRET1, L->status
- | b ->vm_leave_unw
- |
- |//-- Math library -------------------------------------------------------
- |
- |.ffunc_n math_abs
- | efdabs CRET1, CARG1
- | // Fallthrough.
- |
- |->fff_restv:
- | // CRET1 = TValue result.
- | lwz PC, FRAME_PC(BASE)
- | la RA, -8(BASE)
- | evstdd CRET1, 0(RA)
- |->fff_res1:
- | // RA = results, PC = return.
- | li RD, (1+1)*8
- |->fff_res:
- | // RA = results, RD = (nresults+1)*8, PC = return.
- | andi. TMP0, PC, FRAME_TYPE
- | mr MULTRES, RD
- | bne ->vm_return
- | lwz INS, -4(PC)
- | decode_RB8 RB, INS
- |5:
- | cmplw RB, RD // More results expected?
- | decode_RA8 TMP0, INS
- | bgt >6
- | ins_next1
- | // Adjust BASE. KBASE is assumed to be set for the calling frame.
- | sub BASE, RA, TMP0
- | ins_next2
- |
- |6: // Fill up results with nil.
- | subi TMP1, RD, 8
- | addi RD, RD, 8
- | evstddx TISNIL, RA, TMP1
- | b <5
- |
- |.macro math_extern, func
- | .ffunc math_ .. func
- | cmplwi NARGS8:RC, 8
- | evldd CARG2, 0(BASE)
- | blt ->fff_fallback
- | checknum CARG2
- | evmergehi CARG1, CARG2, CARG2
- | checkfail ->fff_fallback
- | bl extern func@plt
- | evmergelo CRET1, CRET1, CRET2
- | b ->fff_restv
- |.endmacro
- |
- |.macro math_extern2, func
- | .ffunc math_ .. func
- | cmplwi NARGS8:RC, 16
- | evldd CARG2, 0(BASE)
- | evldd CARG4, 8(BASE)
- | blt ->fff_fallback
- | evmergehi CARG1, CARG4, CARG2
- | checknum CARG1
- | evmergehi CARG3, CARG4, CARG4
- | checkanyfail ->fff_fallback
- | bl extern func@plt
- | evmergelo CRET1, CRET1, CRET2
- | b ->fff_restv
- |.endmacro
- |
- |.macro math_round, func
- | .ffunc math_ .. func
- | cmplwi NARGS8:RC, 8
- | evldd CARG2, 0(BASE)
- | blt ->fff_fallback
- | checknum CARG2
- | evmergehi CARG1, CARG2, CARG2
- | checkfail ->fff_fallback
- | lwz PC, FRAME_PC(BASE)
- | bl ->vm_..func.._hilo;
- | la RA, -8(BASE)
- | evstdd CRET2, 0(RA)
- | b ->fff_res1
- |.endmacro
- |
- | math_round floor
- | math_round ceil
- |
- | math_extern sqrt
- |
- |.ffunc math_log
- | cmplwi NARGS8:RC, 8
- | evldd CARG2, 0(BASE)
- | bne ->fff_fallback // Need exactly 1 argument.
- | checknum CARG2
- | evmergehi CARG1, CARG2, CARG2
- | checkfail ->fff_fallback
- | bl extern log@plt
- | evmergelo CRET1, CRET1, CRET2
- | b ->fff_restv
- |
- | math_extern log10
- | math_extern exp
- | math_extern sin
- | math_extern cos
- | math_extern tan
- | math_extern asin
- | math_extern acos
- | math_extern atan
- | math_extern sinh
- | math_extern cosh
- | math_extern tanh
- | math_extern2 pow
- | math_extern2 atan2
- | math_extern2 fmod
- |
- |->ff_math_deg:
- |.ffunc_n math_rad
- | evldd CARG2, CFUNC:RB->upvalue[0]
- | efdmul CRET1, CARG1, CARG2
- | b ->fff_restv
- |
- |.ffunc math_ldexp
- | cmplwi NARGS8:RC, 16
- | evldd CARG2, 0(BASE)
- | evldd CARG4, 8(BASE)
- | blt ->fff_fallback
- | evmergehi CARG1, CARG4, CARG2
- | checknum CARG1
- | checkanyfail ->fff_fallback
- | efdctsi CARG3, CARG4
- | bl extern ldexp@plt
- | evmergelo CRET1, CRET1, CRET2
- | b ->fff_restv
- |
- |.ffunc math_frexp
- | cmplwi NARGS8:RC, 8
- | evldd CARG2, 0(BASE)
- | blt ->fff_fallback
- | checknum CARG2
- | evmergehi CARG1, CARG2, CARG2
- | checkfail ->fff_fallback
- | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
- | lwz PC, FRAME_PC(BASE)
- | bl extern frexp@plt
- | lwz TMP1, DISPATCH_GL(tmptv)(DISPATCH)
- | evmergelo CRET1, CRET1, CRET2
- | efdcfsi CRET2, TMP1
- | la RA, -8(BASE)
- | evstdd CRET1, 0(RA)
- | li RD, (2+1)*8
- | evstdd CRET2, 8(RA)
- | b ->fff_res
- |
- |.ffunc math_modf
- | cmplwi NARGS8:RC, 8
- | evldd CARG2, 0(BASE)
- | blt ->fff_fallback
- | checknum CARG2
- | evmergehi CARG1, CARG2, CARG2
- | checkfail ->fff_fallback
- | la CARG3, -8(BASE)
- | lwz PC, FRAME_PC(BASE)
- | bl extern modf@plt
- | evmergelo CRET1, CRET1, CRET2
- | la RA, -8(BASE)
- | evstdd CRET1, 0(BASE)
- | li RD, (2+1)*8
- | b ->fff_res
- |
- |.macro math_minmax, name, cmpop
- | .ffunc_1 name
- | checknum CARG1
- | li TMP1, 8
- | checkfail ->fff_fallback
- |1:
- | evlddx CARG2, BASE, TMP1
- | cmplw cr1, TMP1, NARGS8:RC
- | checknum CARG2
- | bge cr1, ->fff_restv // Ok, since CRET1 = CARG1.
- | checkfail ->fff_fallback
- | cmpop CARG2, CARG1
- | addi TMP1, TMP1, 8
- | crmove 4*cr0+lt, 4*cr0+gt
- | evsel CARG1, CARG2, CARG1
- | b <1
- |.endmacro
- |
- | math_minmax math_min, efdtstlt
- | math_minmax math_max, efdtstgt
- |
- |//-- String library -----------------------------------------------------
- |
- |.ffunc_1 string_len
- | checkstr STR:CARG1
- | checkfail ->fff_fallback
- | lwz TMP0, STR:CARG1->len
- | efdcfsi CRET1, TMP0
- | b ->fff_restv
- |
- |.ffunc string_byte // Only handle the 1-arg case here.
- | cmplwi NARGS8:RC, 8
- | evldd STR:CARG1, 0(BASE)
- | bne ->fff_fallback // Need exactly 1 argument.
- | checkstr STR:CARG1
- | la RA, -8(BASE)
- | checkfail ->fff_fallback
- | lwz TMP0, STR:CARG1->len
- | li RD, (0+1)*8
- | lbz TMP1, STR:CARG1[1] // Access is always ok (NUL at end).
- | li TMP2, (1+1)*8
- | cmplwi TMP0, 0
- | lwz PC, FRAME_PC(BASE)
- | efdcfsi CRET1, TMP1
- | iseleq RD, RD, TMP2
- | evstdd CRET1, 0(RA)
- | b ->fff_res
- |
- |.ffunc string_char // Only handle the 1-arg case here.
- | ffgccheck
- | cmplwi NARGS8:RC, 8
- | evldd CARG1, 0(BASE)
- | bne ->fff_fallback // Exactly 1 argument.
- | checknum CARG1
- | la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
- | checkfail ->fff_fallback
- | efdctsiz TMP0, CARG1
- | li CARG3, 1
- | cmplwi TMP0, 255
- | stb TMP0, 0(CARG2)
- | bgt ->fff_fallback
- |->fff_newstr:
- | mr CARG1, L
- | stw BASE, L->base
- | stw PC, SAVE_PC
- | bl extern lj_str_new // (lua_State *L, char *str, size_t l)
- | // Returns GCstr *.
- | lwz BASE, L->base
- | evmergelo STR:CRET1, TISSTR, STR:CRET1
- | b ->fff_restv
- |
- |.ffunc string_sub
- | ffgccheck
- | cmplwi NARGS8:RC, 16
- | evldd CARG3, 16(BASE)
- | evldd STR:CARG1, 0(BASE)
- | blt ->fff_fallback
- | evldd CARG2, 8(BASE)
- | li TMP2, -1
- | beq >1
- | checknum CARG3
- | checkfail ->fff_fallback
- | efdctsiz TMP2, CARG3
- |1:
- | checknum CARG2
- | checkfail ->fff_fallback
- | checkstr STR:CARG1
- | efdctsiz TMP1, CARG2
- | checkfail ->fff_fallback
- | lwz TMP0, STR:CARG1->len
- | cmplw TMP0, TMP2 // len < end? (unsigned compare)
- | add TMP3, TMP2, TMP0
- | blt >5
- |2:
- | cmpwi TMP1, 0 // start <= 0?
- | add TMP3, TMP1, TMP0
- | ble >7
- |3:
- | sub. CARG3, TMP2, TMP1
- | addi CARG2, STR:CARG1, #STR-1
- | addi CARG3, CARG3, 1
- | add CARG2, CARG2, TMP1
- | isellt CARG3, r0, CARG3
- | b ->fff_newstr
- |
- |5: // Negative end or overflow.
- | cmpw TMP0, TMP2
- | addi TMP3, TMP3, 1
- | iselgt TMP2, TMP3, TMP0 // end = end > len ? len : end+len+1
- | b <2
- |
- |7: // Negative start or underflow.
- | cmpwi cr1, TMP3, 0
- | iseleq TMP1, r0, TMP3
- | isel TMP1, r0, TMP1, 4*cr1+lt
- | addi TMP1, TMP1, 1 // start = 1 + (start ? start+len : 0)
- | b <3
- |
- |.ffunc string_rep // Only handle the 1-char case inline.
- | ffgccheck
- | cmplwi NARGS8:RC, 16
- | evldd CARG1, 0(BASE)
- | evldd CARG2, 8(BASE)
- | bne ->fff_fallback // Exactly 2 arguments.
- | checknum CARG2
- | checkfail ->fff_fallback
- | checkstr STR:CARG1
- | efdctsiz CARG3, CARG2
- | checkfail ->fff_fallback
- | lwz TMP0, STR:CARG1->len
- | cmpwi CARG3, 0
- | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
- | ble >2 // Count <= 0? (or non-int)
- | cmplwi TMP0, 1
- | subi TMP2, CARG3, 1
- | blt >2 // Zero length string?
- | cmplw cr1, TMP1, CARG3
- | bne ->fff_fallback // Fallback for > 1-char strings.
- | lbz TMP0, STR:CARG1[1]
- | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
- | blt cr1, ->fff_fallback
- |1: // Fill buffer with char. Yes, this is suboptimal code (do you care?).
- | cmplwi TMP2, 0
- | stbx TMP0, CARG2, TMP2
- | subi TMP2, TMP2, 1
- | bne <1
- | b ->fff_newstr
- |2: // Return empty string.
- | la STR:CRET1, DISPATCH_GL(strempty)(DISPATCH)
- | evmergelo CRET1, TISSTR, STR:CRET1
- | b ->fff_restv
- |
- |.ffunc string_reverse
- | ffgccheck
- | cmplwi NARGS8:RC, 8
- | evldd CARG1, 0(BASE)
- | blt ->fff_fallback
- | checkstr STR:CARG1
- | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
- | checkfail ->fff_fallback
- | lwz CARG3, STR:CARG1->len
- | la CARG1, #STR(STR:CARG1)
- | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
- | li TMP2, 0
- | cmplw TMP1, CARG3
- | subi TMP3, CARG3, 1
- | blt ->fff_fallback
- |1: // Reverse string copy.
- | cmpwi TMP3, 0
- | lbzx TMP1, CARG1, TMP2
- | blt ->fff_newstr
- | stbx TMP1, CARG2, TMP3
- | subi TMP3, TMP3, 1
- | addi TMP2, TMP2, 1
- | b <1
- |
- |.macro ffstring_case, name, lo
- | .ffunc name
- | ffgccheck
- | cmplwi NARGS8:RC, 8
- | evldd CARG1, 0(BASE)
- | blt ->fff_fallback
- | checkstr STR:CARG1
- | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH)
- | checkfail ->fff_fallback
- | lwz CARG3, STR:CARG1->len
- | la CARG1, #STR(STR:CARG1)
- | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH)
- | cmplw TMP1, CARG3
- | li TMP2, 0
- | blt ->fff_fallback
- |1: // ASCII case conversion.
- | cmplw TMP2, CARG3
- | lbzx TMP1, CARG1, TMP2
- | bge ->fff_newstr
- | subi TMP0, TMP1, lo
- | xori TMP3, TMP1, 0x20
- | cmplwi TMP0, 26
- | isellt TMP1, TMP3, TMP1
- | stbx TMP1, CARG2, TMP2
- | addi TMP2, TMP2, 1
- | b <1
- |.endmacro
- |
- |ffstring_case string_lower, 65
- |ffstring_case string_upper, 97
- |
- |//-- Table library ------------------------------------------------------
- |
- |.ffunc_1 table_getn
- | checktab CARG1
- | checkfail ->fff_fallback
- | bl extern lj_tab_len // (GCtab *t)
- | // Returns uint32_t (but less than 2^31).
- | efdcfsi CRET1, CRET1
- | b ->fff_restv
- |
- |//-- Bit library --------------------------------------------------------
- |
- |.macro .ffunc_bit, name
- | .ffunc_n bit_..name
- | efdadd CARG1, CARG1, TOBIT
- |.endmacro
- |
- |.ffunc_bit tobit
- |->fff_resbit:
- | efdcfsi CRET1, CARG1
- | b ->fff_restv
- |
- |.macro .ffunc_bit_op, name, ins
- | .ffunc_bit name
- | li TMP1, 8
- |1:
- | evlddx CARG2, BASE, TMP1
- | cmplw cr1, TMP1, NARGS8:RC
- | checknum CARG2
- | bge cr1, ->fff_resbit
- | checkfail ->fff_fallback
- | efdadd CARG2, CARG2, TOBIT
- | ins CARG1, CARG1, CARG2
- | addi TMP1, TMP1, 8
- | b <1
- |.endmacro
- |
- |.ffunc_bit_op band, and
- |.ffunc_bit_op bor, or
- |.ffunc_bit_op bxor, xor
- |
- |.ffunc_bit bswap
- | rotlwi TMP0, CARG1, 8
- | rlwimi TMP0, CARG1, 24, 0, 7
- | rlwimi TMP0, CARG1, 24, 16, 23
- | efdcfsi CRET1, TMP0
- | b ->fff_restv
- |
- |.ffunc_bit bnot
- | not TMP0, CARG1
- | efdcfsi CRET1, TMP0
- | b ->fff_restv
- |
- |.macro .ffunc_bit_sh, name, ins, shmod
- | .ffunc_nn bit_..name
- | efdadd CARG2, CARG2, TOBIT
- | efdadd CARG1, CARG1, TOBIT
- |.if shmod == 1
- | rlwinm CARG2, CARG2, 0, 27, 31
- |.elif shmod == 2
- | neg CARG2, CARG2
- |.endif
- | ins TMP0, CARG1, CARG2
- | efdcfsi CRET1, TMP0
- | b ->fff_restv
- |.endmacro
- |
- |.ffunc_bit_sh lshift, slw, 1
- |.ffunc_bit_sh rshift, srw, 1
- |.ffunc_bit_sh arshift, sraw, 1
- |.ffunc_bit_sh rol, rotlw, 0
- |.ffunc_bit_sh ror, rotlw, 2
- |
- |//-----------------------------------------------------------------------
- |
- |->fff_fallback: // Call fast function fallback handler.
- | // BASE = new base, RB = CFUNC, RC = nargs*8
- | lwz TMP3, CFUNC:RB->f
- | add TMP1, BASE, NARGS8:RC
- | lwz PC, FRAME_PC(BASE) // Fallback may overwrite PC.
- | addi TMP0, TMP1, 8*LUA_MINSTACK
- | lwz TMP2, L->maxstack
- | stw PC, SAVE_PC // Redundant (but a defined value).
- | cmplw TMP0, TMP2
- | stw BASE, L->base
- | stw TMP1, L->top
- | mr CARG1, L
- | bgt >5 // Need to grow stack.
- | mtctr TMP3
- | bctrl // (lua_State *L)
- | // Either throws an error, or recovers and returns -1, 0 or nresults+1.
- | lwz BASE, L->base
- | cmpwi CRET1, 0
- | slwi RD, CRET1, 3
- | la RA, -8(BASE)
- | bgt ->fff_res // Returned nresults+1?
- |1: // Returned 0 or -1: retry fast path.
- | lwz TMP0, L->top
- | lwz LFUNC:RB, FRAME_FUNC(BASE)
- | sub NARGS8:RC, TMP0, BASE
- | bne ->vm_call_tail // Returned -1?
- | ins_callt // Returned 0: retry fast path.
- |
- |// Reconstruct previous base for vmeta_call during tailcall.
- |->vm_call_tail:
- | andi. TMP0, PC, FRAME_TYPE
- | rlwinm TMP1, PC, 0, 0, 28
- | bne >3
- | lwz INS, -4(PC)
- | decode_RA8 TMP1, INS
- | addi TMP1, TMP1, 8
- |3:
- | sub TMP2, BASE, TMP1
- | b ->vm_call_dispatch // Resolve again for tailcall.
- |
- |5: // Grow stack for fallback handler.
- | li CARG2, LUA_MINSTACK
- | bl extern lj_state_growstack // (lua_State *L, int n)
- | lwz BASE, L->base
- | cmpw TMP0, TMP0 // Set 4*cr0+eq to force retry.
- | b <1
- |
- |->fff_gcstep: // Call GC step function.
- | // BASE = new base, RC = nargs*8
- | mflr SAVE0
- | stw BASE, L->base
- | add TMP0, BASE, NARGS8:RC
- | stw PC, SAVE_PC // Redundant (but a defined value).
- | stw TMP0, L->top
- | mr CARG1, L
- | bl extern lj_gc_step // (lua_State *L)
- | lwz BASE, L->base
- | mtlr SAVE0
- | lwz TMP0, L->top
- | sub NARGS8:RC, TMP0, BASE
- | lwz CFUNC:RB, FRAME_FUNC(BASE)
- | blr
- |
- |//-----------------------------------------------------------------------
- |//-- Special dispatch targets -------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |->vm_record: // Dispatch target for recording phase.
- |.if JIT
- | NYI
- |.endif
- |
- |->vm_rethook: // Dispatch target for return hooks.
- | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
- | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
- | beq >1
- |5: // Re-dispatch to static ins.
- | addi TMP1, TMP1, GG_DISP2STATIC // Assumes decode_OP4 TMP1, INS.
- | lwzx TMP0, DISPATCH, TMP1
- | mtctr TMP0
- | bctr
- |
- |->vm_inshook: // Dispatch target for instr/line hooks.
- | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH)
- | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH)
- | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active?
- | rlwinm TMP0, TMP3, 31-LUA_HOOKLINE, 31, 0
- | bne <5
- |
- | cmpwi cr1, TMP0, 0
- | addic. TMP2, TMP2, -1
- | beq cr1, <5
- | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH)
- | beq >1
- | bge cr1, <5
- |1:
- | mr CARG1, L
- | stw MULTRES, SAVE_MULTRES
- | mr CARG2, PC
- | stw BASE, L->base
- | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC.
- | bl extern lj_dispatch_ins // (lua_State *L, const BCIns *pc)
- |3:
- | lwz BASE, L->base
- |4: // Re-dispatch to static ins.
- | lwz INS, -4(PC)
- | decode_OP4 TMP1, INS
- | decode_RB8 RB, INS
- | addi TMP1, TMP1, GG_DISP2STATIC
- | decode_RD8 RD, INS
- | lwzx TMP0, DISPATCH, TMP1
- | decode_RA8 RA, INS
- | decode_RC8 RC, INS
- | mtctr TMP0
- | bctr
- |
- |->cont_hook: // Continue from hook yield.
- | addi PC, PC, 4
- | lwz MULTRES, -20(RB) // Restore MULTRES for *M ins.
- | b <4
- |
- |->vm_hotloop: // Hot loop counter underflow.
- |.if JIT
- | NYI
- |.endif
- |
- |->vm_callhook: // Dispatch target for call hooks.
- | mr CARG2, PC
- |.if JIT
- | b >1
- |.endif
- |
- |->vm_hotcall: // Hot call counter underflow.
- |.if JIT
- | ori CARG2, PC, 1
- |1:
- |.endif
- | add TMP0, BASE, RC
- | stw PC, SAVE_PC
- | mr CARG1, L
- | stw BASE, L->base
- | sub RA, RA, BASE
- | stw TMP0, L->top
- | bl extern lj_dispatch_call // (lua_State *L, const BCIns *pc)
- | // Returns ASMFunction.
- | lwz BASE, L->base
- | lwz TMP0, L->top
- | stw ZERO, SAVE_PC // Invalidate for subsequent line hook.
- | sub NARGS8:RC, TMP0, BASE
- | add RA, BASE, RA
- | lwz LFUNC:RB, FRAME_FUNC(BASE)
- | mtctr CRET1
- | bctr
- |
- |//-----------------------------------------------------------------------
- |//-- Trace exit handler -------------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |->vm_exit_handler:
- |.if JIT
- | NYI
- |.endif
- |->vm_exit_interp:
- |.if JIT
- | NYI
- |.endif
- |
- |//-----------------------------------------------------------------------
- |//-- Math helper functions ----------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |// FP value rounding. Called by math.floor/math.ceil fast functions
- |// and from JIT code.
- |//
- |// This can be inlined if the CPU has the frin/friz/frip/frim instructions.
- |// The alternative hard-float approaches have a deep dependency chain.
- |// The resulting latency is at least 3x-7x the double-precision FP latency
- |// (e500v2: 6cy, e600: 5cy, Cell: 10cy) or around 20-70 cycles.
- |//
- |// The soft-float approach is tedious, but much faster (e500v2: ~11cy/~6cy).
- |// However it relies on a fast way to transfer the FP value to GPRs
- |// (e500v2: 0cy for lo-word, 1cy for hi-word).
- |//
- |.macro vm_round, name, mode
- | // Used temporaries: TMP0, TMP1, TMP2, TMP3.
- |->name.._efd: // Input: CARG2, output: CRET2
- | evmergehi CARG1, CARG2, CARG2
- |->name.._hilo:
- | // Input: CARG1 (hi), CARG2 (hi, lo), output: CRET2
- | rlwinm TMP2, CARG1, 12, 21, 31
- | addic. TMP2, TMP2, -1023 // exp = exponent(x) - 1023
- | li TMP1, -1
- | cmplwi cr1, TMP2, 51 // 0 <= exp <= 51?
- | subfic TMP0, TMP2, 52
- | bgt cr1, >1
- | lus TMP3, 0xfff0
- | slw TMP0, TMP1, TMP0 // lomask = -1 << (52-exp)
- | sraw TMP1, TMP3, TMP2 // himask = (int32_t)0xfff00000 >> exp
- |.if mode == 2 // trunc(x):
- | evmergelo TMP0, TMP1, TMP0
- | evand CRET2, CARG2, TMP0 // hi &= himask, lo &= lomask
- |.else
- | andc TMP2, CARG2, TMP0
- | andc TMP3, CARG1, TMP1
- | or TMP2, TMP2, TMP3 // ztest = (hi&~himask) | (lo&~lomask)
- | srawi TMP3, CARG1, 31 // signmask = (int32_t)hi >> 31
- |.if mode == 0 // floor(x):
- | and. TMP2, TMP2, TMP3 // iszero = ((ztest & signmask) == 0)
- |.else // ceil(x):
- | andc. TMP2, TMP2, TMP3 // iszero = ((ztest & ~signmask) == 0)
- |.endif
- | and CARG2, CARG2, TMP0 // lo &= lomask
- | and CARG1, CARG1, TMP1 // hi &= himask
- | subc TMP0, CARG2, TMP0
- | iseleq TMP0, CARG2, TMP0 // lo = iszero ? lo : lo-lomask
- | sube TMP1, CARG1, TMP1
- | iseleq TMP1, CARG1, TMP1 // hi = iszero ? hi : hi-himask+carry
- | evmergelo CRET2, TMP1, TMP0
- |.endif
- | blr
- |1:
- | bgtlr // Already done if >=2^52, +-inf or nan.
- |.if mode == 2 // trunc(x):
- | rlwinm TMP1, CARG1, 0, 0, 0 // hi = sign(x)
- | li TMP0, 0
- | evmergelo CRET2, TMP1, TMP0
- |.else
- | rlwinm TMP2, CARG1, 0, 1, 31
- | srawi TMP0, CARG1, 31 // signmask = (int32_t)hi >> 31
- | or TMP2, TMP2, CARG2 // ztest = abs(hi) | lo
- | lus TMP1, 0x3ff0
- |.if mode == 0 // floor(x):
- | and. TMP2, TMP2, TMP0 // iszero = ((ztest & signmask) == 0)
- |.else // ceil(x):
- | andc. TMP2, TMP2, TMP0 // iszero = ((ztest & ~signmask) == 0)
- |.endif
- | li TMP0, 0
- | iseleq TMP1, r0, TMP1
- | rlwimi CARG1, TMP1, 0, 1, 31 // hi = sign(x) | (iszero ? 0.0 : 1.0)
- | evmergelo CRET2, CARG1, TMP0
- |.endif
- | blr
- |.endmacro
- |
- |->vm_floor:
- | mflr CARG3
- | evmergelo CARG2, CARG1, CARG2
- | bl ->vm_floor_hilo
- | mtlr CARG3
- | evmergehi CRET1, CRET2, CRET2
- | blr
- |
- | vm_round vm_floor, 0
- | vm_round vm_ceil, 1
- |.if JIT
- | vm_round vm_trunc, 2
- |.else
- |->vm_trunc_efd:
- |->vm_trunc_hilo:
- |.endif
- |
- |//-----------------------------------------------------------------------
- |//-- Miscellaneous functions --------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |//-----------------------------------------------------------------------
- |//-- FFI helper functions -----------------------------------------------
- |//-----------------------------------------------------------------------
- |
- |->vm_ffi_call:
- |.if FFI
- | NYI
- |.endif
- |
- |//-----------------------------------------------------------------------
-}
-
-/* Generate the code for a single instruction. */
-static void build_ins(BuildCtx *ctx, BCOp op, int defop)
-{
- int vk = 0;
- |=>defop:
-
- switch (op) {
-
- /* -- Comparison ops ---------------------------------------------------- */
-
- /* Remember: all ops branch for a true comparison, fall through otherwise. */
-
- case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT:
- | // RA = src1*8, RD = src2*8, JMP with RD = target
- | evlddx TMP0, BASE, RA
- | addi PC, PC, 4
- | evlddx TMP1, BASE, RD
- | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
- | lwz TMP2, -4(PC)
- | evmergehi RB, TMP0, TMP1
- | decode_RD4 TMP2, TMP2
- | checknum RB
- | add TMP2, TMP2, TMP3
- | checkanyfail ->vmeta_comp
- | efdcmplt TMP0, TMP1
- if (op == BC_ISLE || op == BC_ISGT) {
- | efdcmpeq cr1, TMP0, TMP1
- | cror 4*cr0+gt, 4*cr0+gt, 4*cr1+gt
- }
- if (op == BC_ISLT || op == BC_ISLE) {
- | iselgt PC, TMP2, PC
- } else {
- | iselgt PC, PC, TMP2
- }
- | ins_next
- break;
-
- case BC_ISEQV: case BC_ISNEV:
- vk = op == BC_ISEQV;
- | // RA = src1*8, RD = src2*8, JMP with RD = target
- | evlddx CARG2, BASE, RA
- | addi PC, PC, 4
- | evlddx CARG3, BASE, RD
- | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
- | lwz TMP2, -4(PC)
- | evmergehi RB, CARG2, CARG3
- | decode_RD4 TMP2, TMP2
- | checknum RB
- | add TMP2, TMP2, TMP3
- | checkanyfail >5
- | efdcmpeq CARG2, CARG3
- if (vk) {
- | iselgt PC, TMP2, PC
- } else {
- | iselgt PC, PC, TMP2
- }
- |1:
- | ins_next
- |
- |5: // Either or both types are not numbers.
- | evcmpeq CARG2, CARG3
- | not TMP3, RB
- | cmplwi cr1, TMP3, ~LJ_TISPRI // Primitive?
- | crorc 4*cr7+lt, 4*cr0+so, 4*cr0+lt // 1: Same tv or different type.
- | cmplwi cr6, TMP3, ~LJ_TISTABUD // Table or userdata?
- | crandc 4*cr7+gt, 4*cr0+lt, 4*cr1+gt // 2: Same type and primitive.
- | mr SAVE0, PC
- if (vk) {
- | isel PC, TMP2, PC, 4*cr7+gt
- } else {
- | isel TMP2, PC, TMP2, 4*cr7+gt
- }
- | cror 4*cr7+lt, 4*cr7+lt, 4*cr7+gt // 1 or 2.
- if (vk) {
- | isel PC, TMP2, PC, 4*cr0+so
- } else {
- | isel PC, PC, TMP2, 4*cr0+so
- }
- | blt cr7, <1 // Done if 1 or 2.
- | blt cr6, <1 // Done if not tab/ud.
- |
- | // Different tables or userdatas. Need to check __eq metamethod.
- | // Field metatable must be at same offset for GCtab and GCudata!
- | lwz TAB:TMP2, TAB:CARG2->metatable
- | li CARG4, 1-vk // ne = 0 or 1.
- | cmplwi TAB:TMP2, 0
- | beq <1 // No metatable?
- | lbz TMP2, TAB:TMP2->nomm
- | andi. TMP2, TMP2, 1<<MM_eq
- | bne <1 // Or 'no __eq' flag set?
- | mr PC, SAVE0 // Restore old PC.
- | b ->vmeta_equal // Handle __eq metamethod.
- break;
-
- case BC_ISEQS: case BC_ISNES:
- vk = op == BC_ISEQS;
- | // RA = src*8, RD = str_const*8 (~), JMP with RD = target
- | evlddx TMP0, BASE, RA
- | srwi RD, RD, 1
- | lwz INS, 0(PC)
- | subfic RD, RD, -4
- | addi PC, PC, 4
- | lwzx STR:TMP1, KBASE, RD // KBASE-4-str_const*4
- | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
- | decode_RD4 TMP2, INS
- | evmergelo STR:TMP1, TISSTR, STR:TMP1
- | add TMP2, TMP2, TMP3
- | evcmpeq TMP0, STR:TMP1
- if (vk) {
- | isel PC, TMP2, PC, 4*cr0+so
- } else {
- | isel PC, PC, TMP2, 4*cr0+so
- }
- | ins_next
- break;
-
- case BC_ISEQN: case BC_ISNEN:
- vk = op == BC_ISEQN;
- | // RA = src*8, RD = num_const*8, JMP with RD = target
- | evlddx TMP0, BASE, RA
- | addi PC, PC, 4
- | evlddx TMP1, KBASE, RD
- | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
- | lwz INS, -4(PC)
- | checknum TMP0
- | checkfail >5
- | efdcmpeq TMP0, TMP1
- |1:
- | decode_RD4 TMP2, INS
- | add TMP2, TMP2, TMP3
- if (vk) {
- | iselgt PC, TMP2, PC
- |5:
- } else {
- | iselgt PC, PC, TMP2
- }
- |3:
- | ins_next
- if (!vk) {
- |5:
- | decode_RD4 TMP2, INS
- | add PC, TMP2, TMP3
- | b <3
- }
- break;
-
- case BC_ISEQP: case BC_ISNEP:
- vk = op == BC_ISEQP;
- | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target
- | lwzx TMP0, BASE, RA
- | srwi TMP1, RD, 3
- | lwz INS, 0(PC)
- | addi PC, PC, 4
- | not TMP1, TMP1
- | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
- | cmplw TMP0, TMP1
- | decode_RD4 TMP2, INS
- | add TMP2, TMP2, TMP3
- if (vk) {
- | iseleq PC, TMP2, PC
- } else {
- | iseleq PC, PC, TMP2
- }
- | ins_next
- break;
-
- /* -- Unary test and copy ops ------------------------------------------- */
-
- case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF:
- | // RA = dst*8 or unused, RD = src*8, JMP with RD = target
- | evlddx TMP0, BASE, RD
- | evaddw TMP1, TISNIL, TISNIL // Synthesize LJ_TFALSE.
- | lwz INS, 0(PC)
- | evcmpltu TMP0, TMP1
- | addi PC, PC, 4
- if (op == BC_IST || op == BC_ISF) {
- | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
- | decode_RD4 TMP2, INS
- | add TMP2, TMP2, TMP3
- if (op == BC_IST) {
- | isellt PC, TMP2, PC
- } else {
- | isellt PC, PC, TMP2
- }
- } else {
- if (op == BC_ISTC) {
- | checkfail >1
- } else {
- | checkok >1
- }
- | addis PC, PC, -(BCBIAS_J*4 >> 16)
- | decode_RD4 TMP2, INS
- | evstddx TMP0, BASE, RA
- | add PC, PC, TMP2
- |1:
- }
- | ins_next
- break;
-
- /* -- Unary ops --------------------------------------------------------- */
-
- case BC_MOV:
- | // RA = dst*8, RD = src*8
- | ins_next1
- | evlddx TMP0, BASE, RD
- | evstddx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_NOT:
- | // RA = dst*8, RD = src*8
- | ins_next1
- | lwzx TMP0, BASE, RD
- | subfic TMP1, TMP0, LJ_TTRUE
- | adde TMP0, TMP0, TMP1
- | stwx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_UNM:
- | // RA = dst*8, RD = src*8
- | evlddx TMP0, BASE, RD
- | checknum TMP0
- | checkfail ->vmeta_unm
- | efdneg TMP0, TMP0
- | ins_next1
- | evstddx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_LEN:
- | // RA = dst*8, RD = src*8
- | evlddx CARG1, BASE, RD
- | checkstr CARG1
- | checkfail >2
- | lwz CRET1, STR:CARG1->len
- |1:
- | ins_next1
- | efdcfsi TMP0, CRET1
- | evstddx TMP0, BASE, RA
- | ins_next2
- |2:
- | checktab CARG1
- | checkfail ->vmeta_len
-#if LJ_52
- | lwz TAB:TMP2, TAB:CARG1->metatable
- | cmplwi TAB:TMP2, 0
- | bne >9
- |3:
-#endif
- |->BC_LEN_Z:
- | bl extern lj_tab_len // (GCtab *t)
- | // Returns uint32_t (but less than 2^31).
- | b <1
-#if LJ_52
- |9:
- | lbz TMP0, TAB:TMP2->nomm
- | andi. TMP0, TMP0, 1<<MM_len
- | bne <3 // 'no __len' flag set: done.
- | b ->vmeta_len
-#endif
- break;
-
- /* -- Binary ops -------------------------------------------------------- */
-
- |.macro ins_arithpre, t0, t1
- | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8
- ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
- ||switch (vk) {
- ||case 0:
- | evlddx t0, BASE, RB
- | checknum t0
- | evlddx t1, KBASE, RC
- | checkfail ->vmeta_arith_vn
- || break;
- ||case 1:
- | evlddx t1, BASE, RB
- | checknum t1
- | evlddx t0, KBASE, RC
- | checkfail ->vmeta_arith_nv
- || break;
- ||default:
- | evlddx t0, BASE, RB
- | evlddx t1, BASE, RC
- | evmergehi TMP2, t0, t1
- | checknum TMP2
- | checkanyfail ->vmeta_arith_vv
- || break;
- ||}
- |.endmacro
- |
- |.macro ins_arith, ins
- | ins_arithpre TMP0, TMP1
- | ins_next1
- | ins TMP0, TMP0, TMP1
- | evstddx TMP0, BASE, RA
- | ins_next2
- |.endmacro
-
- case BC_ADDVN: case BC_ADDNV: case BC_ADDVV:
- | ins_arith efdadd
- break;
- case BC_SUBVN: case BC_SUBNV: case BC_SUBVV:
- | ins_arith efdsub
- break;
- case BC_MULVN: case BC_MULNV: case BC_MULVV:
- | ins_arith efdmul
- break;
- case BC_DIVVN: case BC_DIVNV: case BC_DIVVV:
- | ins_arith efddiv
- break;
- case BC_MODVN:
- | ins_arithpre RD, SAVE0
- |->BC_MODVN_Z:
- | efddiv CARG2, RD, SAVE0
- | bl ->vm_floor_efd // floor(b/c)
- | efdmul TMP0, CRET2, SAVE0
- | ins_next1
- | efdsub TMP0, RD, TMP0 // b - floor(b/c)*c
- | evstddx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_MODNV: case BC_MODVV:
- | ins_arithpre RD, SAVE0
- | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway.
- break;
- case BC_POW:
- | evlddx CARG2, BASE, RB
- | evlddx CARG4, BASE, RC
- | evmergehi CARG1, CARG4, CARG2
- | checknum CARG1
- | evmergehi CARG3, CARG4, CARG4
- | checkanyfail ->vmeta_arith_vv
- | bl extern pow@plt
- | evmergelo CRET2, CRET1, CRET2
- | evstddx CRET2, BASE, RA
- | ins_next
- break;
-
- case BC_CAT:
- | // RA = dst*8, RB = src_start*8, RC = src_end*8
- | sub CARG3, RC, RB
- | stw BASE, L->base
- | add CARG2, BASE, RC
- | mr SAVE0, RB
- |->BC_CAT_Z:
- | stw PC, SAVE_PC
- | mr CARG1, L
- | srwi CARG3, CARG3, 3
- | bl extern lj_meta_cat // (lua_State *L, TValue *top, int left)
- | // Returns NULL (finished) or TValue * (metamethod).
- | cmplwi CRET1, 0
- | lwz BASE, L->base
- | bne ->vmeta_binop
- | evlddx TMP0, BASE, SAVE0 // Copy result from RB to RA.
- | evstddx TMP0, BASE, RA
- | ins_next
- break;
-
- /* -- Constant ops ------------------------------------------------------ */
-
- case BC_KSTR:
- | // RA = dst*8, RD = str_const*8 (~)
- | ins_next1
- | srwi TMP1, RD, 1
- | subfic TMP1, TMP1, -4
- | lwzx TMP0, KBASE, TMP1 // KBASE-4-str_const*4
- | evmergelo TMP0, TISSTR, TMP0
- | evstddx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_KCDATA:
- |.if FFI
- | // RA = dst*8, RD = cdata_const*8 (~)
- | ins_next1
- | srwi TMP1, RD, 1
- | subfic TMP1, TMP1, -4
- | lwzx TMP0, KBASE, TMP1 // KBASE-4-cdata_const*4
- | li TMP2, LJ_TCDATA
- | evmergelo TMP0, TMP2, TMP0
- | evstddx TMP0, BASE, RA
- | ins_next2
- |.endif
- break;
- case BC_KSHORT:
- | // RA = dst*8, RD = int16_literal*8
- | srwi TMP1, RD, 3
- | extsh TMP1, TMP1
- | ins_next1
- | efdcfsi TMP0, TMP1
- | evstddx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_KNUM:
- | // RA = dst*8, RD = num_const*8
- | evlddx TMP0, KBASE, RD
- | ins_next1
- | evstddx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_KPRI:
- | // RA = dst*8, RD = primitive_type*8 (~)
- | srwi TMP1, RD, 3
- | not TMP0, TMP1
- | ins_next1
- | stwx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_KNIL:
- | // RA = base*8, RD = end*8
- | evstddx TISNIL, BASE, RA
- | addi RA, RA, 8
- |1:
- | evstddx TISNIL, BASE, RA
- | cmpw RA, RD
- | addi RA, RA, 8
- | blt <1
- | ins_next_
- break;
-
- /* -- Upvalue and function ops ------------------------------------------ */
-
- case BC_UGET:
- | // RA = dst*8, RD = uvnum*8
- | ins_next1
- | lwz LFUNC:RB, FRAME_FUNC(BASE)
- | srwi RD, RD, 1
- | addi RD, RD, offsetof(GCfuncL, uvptr)
- | lwzx UPVAL:RB, LFUNC:RB, RD
- | lwz TMP1, UPVAL:RB->v
- | evldd TMP0, 0(TMP1)
- | evstddx TMP0, BASE, RA
- | ins_next2
- break;
- case BC_USETV:
- | // RA = uvnum*8, RD = src*8
- | lwz LFUNC:RB, FRAME_FUNC(BASE)
- | srwi RA, RA, 1
- | addi RA, RA, offsetof(GCfuncL, uvptr)
- | evlddx TMP1, BASE, RD
- | lwzx UPVAL:RB, LFUNC:RB, RA
- | lbz TMP3, UPVAL:RB->marked
- | lwz CARG2, UPVAL:RB->v
- | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
- | lbz TMP0, UPVAL:RB->closed
- | evmergehi TMP2, TMP1, TMP1
- | evstdd TMP1, 0(CARG2)
- | cmplwi cr1, TMP0, 0
- | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
- | subi TMP2, TMP2, (LJ_TISNUM+1)
- | bne >2 // Upvalue is closed and black?
- |1:
- | ins_next
- |
- |2: // Check if new value is collectable.
- | cmplwi TMP2, LJ_TISGCV - (LJ_TISNUM+1)
- | bge <1 // tvisgcv(v)
- | lbz TMP3, GCOBJ:TMP1->gch.marked
- | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(v)
- | la CARG1, GG_DISP2G(DISPATCH)
- | // Crossed a write barrier. Move the barrier forward.
- | beq <1
- | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
- | b <1
- break;
- case BC_USETS:
- | // RA = uvnum*8, RD = str_const*8 (~)
- | lwz LFUNC:RB, FRAME_FUNC(BASE)
- | srwi TMP1, RD, 1
- | srwi RA, RA, 1
- | subfic TMP1, TMP1, -4
- | addi RA, RA, offsetof(GCfuncL, uvptr)
- | lwzx STR:TMP1, KBASE, TMP1 // KBASE-4-str_const*4
- | lwzx UPVAL:RB, LFUNC:RB, RA
- | evmergelo STR:TMP1, TISSTR, STR:TMP1
- | lbz TMP3, UPVAL:RB->marked
- | lwz CARG2, UPVAL:RB->v
- | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv)
- | lbz TMP3, STR:TMP1->marked
- | lbz TMP2, UPVAL:RB->closed
- | evstdd STR:TMP1, 0(CARG2)
- | bne >2
- |1:
- | ins_next
- |
- |2: // Check if string is white and ensure upvalue is closed.
- | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(str)
- | cmplwi cr1, TMP2, 0
- | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
- | la CARG1, GG_DISP2G(DISPATCH)
- | // Crossed a write barrier. Move the barrier forward.
- | beq <1
- | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv)
- | b <1
- break;
- case BC_USETN:
- | // RA = uvnum*8, RD = num_const*8
- | ins_next1
- | lwz LFUNC:RB, FRAME_FUNC(BASE)
- | srwi RA, RA, 1
- | addi RA, RA, offsetof(GCfuncL, uvptr)
- | evlddx TMP0, KBASE, RD
- | lwzx UPVAL:RB, LFUNC:RB, RA
- | lwz TMP1, UPVAL:RB->v
- | evstdd TMP0, 0(TMP1)
- | ins_next2
- break;
- case BC_USETP:
- | // RA = uvnum*8, RD = primitive_type*8 (~)
- | ins_next1
- | lwz LFUNC:RB, FRAME_FUNC(BASE)
- | srwi RA, RA, 1
- | addi RA, RA, offsetof(GCfuncL, uvptr)
- | srwi TMP0, RD, 3
- | lwzx UPVAL:RB, LFUNC:RB, RA
- | not TMP0, TMP0
- | lwz TMP1, UPVAL:RB->v
- | stw TMP0, 0(TMP1)
- | ins_next2
- break;
-
- case BC_UCLO:
- | // RA = level*8, RD = target
- | lwz TMP1, L->openupval
- | branch_RD // Do this first since RD is not saved.
- | stw BASE, L->base
- | cmplwi TMP1, 0
- | mr CARG1, L
- | beq >1
- | add CARG2, BASE, RA
- | bl extern lj_func_closeuv // (lua_State *L, TValue *level)
- | lwz BASE, L->base
- |1:
- | ins_next
- break;
-
- case BC_FNEW:
- | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype)
- | srwi TMP1, RD, 1
- | stw BASE, L->base
- | subfic TMP1, TMP1, -4
- | stw PC, SAVE_PC
- | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
- | mr CARG1, L
- | lwz CARG3, FRAME_FUNC(BASE)
- | // (lua_State *L, GCproto *pt, GCfuncL *parent)
- | bl extern lj_func_newL_gc
- | // Returns GCfuncL *.
- | lwz BASE, L->base
- | evmergelo LFUNC:CRET1, TISFUNC, LFUNC:CRET1
- | evstddx LFUNC:CRET1, BASE, RA
- | ins_next
- break;
-
- /* -- Table ops --------------------------------------------------------- */
-
- case BC_TNEW:
- case BC_TDUP:
- | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~)
- | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH)
- | mr CARG1, L
- | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH)
- | stw BASE, L->base
- | cmplw TMP0, TMP1
- | stw PC, SAVE_PC
- | bge >5
- |1:
- if (op == BC_TNEW) {
- | rlwinm CARG2, RD, 29, 21, 31
- | rlwinm CARG3, RD, 18, 27, 31
- | cmpwi CARG2, 0x7ff
- | li TMP1, 0x801
- | iseleq CARG2, TMP1, CARG2
- | bl extern lj_tab_new // (lua_State *L, int32_t asize, uint32_t hbits)
- | // Returns Table *.
- } else {
- | srwi TMP1, RD, 1
- | subfic TMP1, TMP1, -4
- | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4
- | bl extern lj_tab_dup // (lua_State *L, Table *kt)
- | // Returns Table *.
- }
- | lwz BASE, L->base
- | evmergelo TAB:CRET1, TISTAB, TAB:CRET1
- | evstddx TAB:CRET1, BASE, RA
- | ins_next
- |5:
- | mr SAVE0, RD
- | bl extern lj_gc_step_fixtop // (lua_State *L)
- | mr RD, SAVE0
- | mr CARG1, L
- | b <1
- break;
-
- case BC_GGET:
- | // RA = dst*8, RD = str_const*8 (~)
- case BC_GSET:
- | // RA = src*8, RD = str_const*8 (~)
- | lwz LFUNC:TMP2, FRAME_FUNC(BASE)
- | srwi TMP1, RD, 1
- | lwz TAB:RB, LFUNC:TMP2->env
- | subfic TMP1, TMP1, -4
- | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
- if (op == BC_GGET) {
- | b ->BC_TGETS_Z
- } else {
- | b ->BC_TSETS_Z
- }
- break;
-
- case BC_TGETV:
- | // RA = dst*8, RB = table*8, RC = key*8
- | evlddx TAB:RB, BASE, RB
- | evlddx RC, BASE, RC
- | checktab TAB:RB
- | checkfail ->vmeta_tgetv
- | checknum RC
- | checkfail >5
- | // Convert number key to integer
- | efdctsi TMP2, RC
- | lwz TMP0, TAB:RB->asize
- | efdcfsi TMP1, TMP2
- | cmplw cr0, TMP0, TMP2
- | efdcmpeq cr1, RC, TMP1
- | lwz TMP1, TAB:RB->array
- | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+gt
- | slwi TMP2, TMP2, 3
- | ble ->vmeta_tgetv // Integer key and in array part?
- | evlddx TMP1, TMP1, TMP2
- | checknil TMP1
- | checkok >2
- |1:
- | evstddx TMP1, BASE, RA
- | ins_next
- |
- |2: // Check for __index if table value is nil.
- | lwz TAB:TMP2, TAB:RB->metatable
- | cmplwi TAB:TMP2, 0
- | beq <1 // No metatable: done.
- | lbz TMP0, TAB:TMP2->nomm
- | andi. TMP0, TMP0, 1<<MM_index
- | bne <1 // 'no __index' flag set: done.
- | b ->vmeta_tgetv
- |
- |5:
- | checkstr STR:RC // String key?
- | checkok ->BC_TGETS_Z
- | b ->vmeta_tgetv
- break;
- case BC_TGETS:
- | // RA = dst*8, RB = table*8, RC = str_const*8 (~)
- | evlddx TAB:RB, BASE, RB
- | srwi TMP1, RC, 1
- | checktab TAB:RB
- | subfic TMP1, TMP1, -4
- | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
- | checkfail ->vmeta_tgets1
- |->BC_TGETS_Z:
- | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8
- | lwz TMP0, TAB:RB->hmask
- | lwz TMP1, STR:RC->hash
- | lwz NODE:TMP2, TAB:RB->node
- | evmergelo STR:RC, TISSTR, STR:RC
- | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
- | slwi TMP0, TMP1, 5
- | slwi TMP1, TMP1, 3
- | sub TMP1, TMP0, TMP1
- | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
- |1:
- | evldd TMP0, NODE:TMP2->key
- | evldd TMP1, NODE:TMP2->val
- | evcmpeq TMP0, STR:RC
- | checkanyfail >4
- | checknil TMP1
- | checkok >5 // Key found, but nil value?
- |3:
- | evstddx TMP1, BASE, RA
- | ins_next
- |
- |4: // Follow hash chain.
- | lwz NODE:TMP2, NODE:TMP2->next
- | cmplwi NODE:TMP2, 0
- | bne <1
- | // End of hash chain: key not found, nil result.
- | evmr TMP1, TISNIL
- |
- |5: // Check for __index if table value is nil.
- | lwz TAB:TMP2, TAB:RB->metatable
- | cmplwi TAB:TMP2, 0
- | beq <3 // No metatable: done.
- | lbz TMP0, TAB:TMP2->nomm
- | andi. TMP0, TMP0, 1<<MM_index
- | bne <3 // 'no __index' flag set: done.
- | b ->vmeta_tgets
- break;
- case BC_TGETB:
- | // RA = dst*8, RB = table*8, RC = index*8
- | evlddx TAB:RB, BASE, RB
- | srwi TMP0, RC, 3
- | checktab TAB:RB
- | checkfail ->vmeta_tgetb
- | lwz TMP1, TAB:RB->asize
- | lwz TMP2, TAB:RB->array
- | cmplw TMP0, TMP1
- | bge ->vmeta_tgetb
- | evlddx TMP1, TMP2, RC
- | checknil TMP1
- | checkok >5
- |1:
- | ins_next1
- | evstddx TMP1, BASE, RA
- | ins_next2
- |
- |5: // Check for __index if table value is nil.
- | lwz TAB:TMP2, TAB:RB->metatable
- | cmplwi TAB:TMP2, 0
- | beq <1 // No metatable: done.
- | lbz TMP2, TAB:TMP2->nomm
- | andi. TMP2, TMP2, 1<<MM_index
- | bne <1 // 'no __index' flag set: done.
- | b ->vmeta_tgetb // Caveat: preserve TMP0!
- break;
-
- case BC_TSETV:
- | // RA = src*8, RB = table*8, RC = key*8
- | evlddx TAB:RB, BASE, RB
- | evlddx RC, BASE, RC
- | checktab TAB:RB
- | checkfail ->vmeta_tsetv
- | checknum RC
- | checkfail >5
- | // Convert number key to integer
- | efdctsi TMP2, RC
- | evlddx SAVE0, BASE, RA
- | lwz TMP0, TAB:RB->asize
- | efdcfsi TMP1, TMP2
- | cmplw cr0, TMP0, TMP2
- | efdcmpeq cr1, RC, TMP1
- | lwz TMP1, TAB:RB->array
- | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+gt
- | slwi TMP0, TMP2, 3
- | ble ->vmeta_tsetv // Integer key and in array part?
- | lbz TMP3, TAB:RB->marked
- | evlddx TMP2, TMP1, TMP0
- | checknil TMP2
- | checkok >3
- |1:
- | andi. TMP2, TMP3, LJ_GC_BLACK // isblack(table)
- | evstddx SAVE0, TMP1, TMP0
- | bne >7
- |2:
- | ins_next
- |
- |3: // Check for __newindex if previous value is nil.
- | lwz TAB:TMP2, TAB:RB->metatable
- | cmplwi TAB:TMP2, 0
- | beq <1 // No metatable: done.
- | lbz TMP2, TAB:TMP2->nomm
- | andi. TMP2, TMP2, 1<<MM_newindex
- | bne <1 // 'no __newindex' flag set: done.
- | b ->vmeta_tsetv
- |
- |5:
- | checkstr STR:RC // String key?
- | checkok ->BC_TSETS_Z
- | b ->vmeta_tsetv
- |
- |7: // Possible table write barrier for the value. Skip valiswhite check.
- | barrierback TAB:RB, TMP3, TMP0
- | b <2
- break;
- case BC_TSETS:
- | // RA = src*8, RB = table*8, RC = str_const*8 (~)
- | evlddx TAB:RB, BASE, RB
- | srwi TMP1, RC, 1
- | checktab TAB:RB
- | subfic TMP1, TMP1, -4
- | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4
- | checkfail ->vmeta_tsets1
- |->BC_TSETS_Z:
- | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = src*8
- | lwz TMP0, TAB:RB->hmask
- | lwz TMP1, STR:RC->hash
- | lwz NODE:TMP2, TAB:RB->node
- | evmergelo STR:RC, TISSTR, STR:RC
- | stb ZERO, TAB:RB->nomm // Clear metamethod cache.
- | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask
- | evlddx SAVE0, BASE, RA
- | slwi TMP0, TMP1, 5
- | slwi TMP1, TMP1, 3
- | sub TMP1, TMP0, TMP1
- | lbz TMP3, TAB:RB->marked
- | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8)
- |1:
- | evldd TMP0, NODE:TMP2->key
- | evldd TMP1, NODE:TMP2->val
- | evcmpeq TMP0, STR:RC
- | checkanyfail >5
- | checknil TMP1
- | checkok >4 // Key found, but nil value?
- |2:
- | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
- | evstdd SAVE0, NODE:TMP2->val
- | bne >7
- |3:
- | ins_next
- |
- |4: // Check for __newindex if previous value is nil.
- | lwz TAB:TMP1, TAB:RB->metatable
- | cmplwi TAB:TMP1, 0
- | beq <2 // No metatable: done.
- | lbz TMP0, TAB:TMP1->nomm
- | andi. TMP0, TMP0, 1<<MM_newindex
- | bne <2 // 'no __newindex' flag set: done.
- | b ->vmeta_tsets
- |
- |5: // Follow hash chain.
- | lwz NODE:TMP2, NODE:TMP2->next
- | cmplwi NODE:TMP2, 0
- | bne <1
- | // End of hash chain: key not found, add a new one.
- |
- | // But check for __newindex first.
- | lwz TAB:TMP1, TAB:RB->metatable
- | la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
- | stw PC, SAVE_PC
- | mr CARG1, L
- | cmplwi TAB:TMP1, 0
- | stw BASE, L->base
- | beq >6 // No metatable: continue.
- | lbz TMP0, TAB:TMP1->nomm
- | andi. TMP0, TMP0, 1<<MM_newindex
- | beq ->vmeta_tsets // 'no __newindex' flag NOT set: check.
- |6:
- | mr CARG2, TAB:RB
- | evstdd STR:RC, 0(CARG3)
- | bl extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k)
- | // Returns TValue *.
- | lwz BASE, L->base
- | evstdd SAVE0, 0(CRET1)
- | b <3 // No 2nd write barrier needed.
- |
- |7: // Possible table write barrier for the value. Skip valiswhite check.
- | barrierback TAB:RB, TMP3, TMP0
- | b <3
- break;
- case BC_TSETB:
- | // RA = src*8, RB = table*8, RC = index*8
- | evlddx TAB:RB, BASE, RB
- | srwi TMP0, RC, 3
- | checktab TAB:RB
- | checkfail ->vmeta_tsetb
- | lwz TMP1, TAB:RB->asize
- | lwz TMP2, TAB:RB->array
- | lbz TMP3, TAB:RB->marked
- | cmplw TMP0, TMP1
- | evlddx SAVE0, BASE, RA
- | bge ->vmeta_tsetb
- | evlddx TMP1, TMP2, RC
- | checknil TMP1
- | checkok >5
- |1:
- | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
- | evstddx SAVE0, TMP2, RC
- | bne >7
- |2:
- | ins_next
- |
- |5: // Check for __newindex if previous value is nil.
- | lwz TAB:TMP1, TAB:RB->metatable
- | cmplwi TAB:TMP1, 0
- | beq <1 // No metatable: done.
- | lbz TMP1, TAB:TMP1->nomm
- | andi. TMP1, TMP1, 1<<MM_newindex
- | bne <1 // 'no __newindex' flag set: done.
- | b ->vmeta_tsetb // Caveat: preserve TMP0!
- |
- |7: // Possible table write barrier for the value. Skip valiswhite check.
- | barrierback TAB:RB, TMP3, TMP0
- | b <2
- break;
-
- case BC_TSETM:
- | // RA = base*8 (table at base-1), RD = num_const*8 (start index)
- | add RA, BASE, RA
- |1:
- | add TMP3, KBASE, RD
- | lwz TAB:CARG2, -4(RA) // Guaranteed to be a table.
- | addic. TMP0, MULTRES, -8
- | lwz TMP3, 4(TMP3) // Integer constant is in lo-word.
- | srwi CARG3, TMP0, 3
- | beq >4 // Nothing to copy?
- | add CARG3, CARG3, TMP3
- | lwz TMP2, TAB:CARG2->asize
- | slwi TMP1, TMP3, 3
- | lbz TMP3, TAB:CARG2->marked
- | cmplw CARG3, TMP2
- | add TMP2, RA, TMP0
- | lwz TMP0, TAB:CARG2->array
- | bgt >5
- | add TMP1, TMP1, TMP0
- | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table)
- |3: // Copy result slots to table.
- | evldd TMP0, 0(RA)
- | addi RA, RA, 8
- | cmpw cr1, RA, TMP2
- | evstdd TMP0, 0(TMP1)
- | addi TMP1, TMP1, 8
- | blt cr1, <3
- | bne >7
- |4:
- | ins_next
- |
- |5: // Need to resize array part.
- | stw BASE, L->base
- | mr CARG1, L
- | stw PC, SAVE_PC
- | mr SAVE0, RD
- | bl extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize)
- | // Must not reallocate the stack.
- | mr RD, SAVE0
- | b <1
- |
- |7: // Possible table write barrier for any value. Skip valiswhite check.
- | barrierback TAB:CARG2, TMP3, TMP0
- | b <4
- break;
-
- /* -- Calls and vararg handling ----------------------------------------- */
-
- case BC_CALLM:
- | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8
- | add NARGS8:RC, NARGS8:RC, MULTRES
- | // Fall through. Assumes BC_CALL follows.
- break;
- case BC_CALL:
- | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8
- | evlddx LFUNC:RB, BASE, RA
- | mr TMP2, BASE
- | add BASE, BASE, RA
- | subi NARGS8:RC, NARGS8:RC, 8
- | checkfunc LFUNC:RB
- | addi BASE, BASE, 8
- | checkfail ->vmeta_call
- | ins_call
- break;
-
- case BC_CALLMT:
- | // RA = base*8, (RB = 0,) RC = extra_nargs*8
- | add NARGS8:RC, NARGS8:RC, MULTRES
- | // Fall through. Assumes BC_CALLT follows.
- break;
- case BC_CALLT:
- | // RA = base*8, (RB = 0,) RC = (nargs+1)*8
- | evlddx LFUNC:RB, BASE, RA
- | add RA, BASE, RA
- | lwz TMP1, FRAME_PC(BASE)
- | subi NARGS8:RC, NARGS8:RC, 8
- | checkfunc LFUNC:RB
- | addi RA, RA, 8
- | checkfail ->vmeta_callt
- |->BC_CALLT_Z:
- | andi. TMP0, TMP1, FRAME_TYPE // Caveat: preserve cr0 until the crand.
- | lbz TMP3, LFUNC:RB->ffid
- | xori TMP2, TMP1, FRAME_VARG
- | cmplwi cr1, NARGS8:RC, 0
- | bne >7
- |1:
- | stw LFUNC:RB, FRAME_FUNC(BASE) // Copy function down, but keep PC.
- | li TMP2, 0
- | cmplwi cr7, TMP3, 1 // (> FF_C) Calling a fast function?
- | beq cr1, >3
- |2:
- | addi TMP3, TMP2, 8
- | evlddx TMP0, RA, TMP2
- | cmplw cr1, TMP3, NARGS8:RC
- | evstddx TMP0, BASE, TMP2
- | mr TMP2, TMP3
- | bne cr1, <2
- |3:
- | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+gt
- | beq >5
- |4:
- | ins_callt
- |
- |5: // Tailcall to a fast function with a Lua frame below.
- | lwz INS, -4(TMP1)
- | decode_RA8 RA, INS
- | sub TMP1, BASE, RA
- | lwz LFUNC:TMP1, FRAME_FUNC-8(TMP1)
- | lwz TMP1, LFUNC:TMP1->pc
- | lwz KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE.
- | b <4
- |
- |7: // Tailcall from a vararg function.
- | andi. TMP0, TMP2, FRAME_TYPEP
- | bne <1 // Vararg frame below?
- | sub BASE, BASE, TMP2 // Relocate BASE down.
- | lwz TMP1, FRAME_PC(BASE)
- | andi. TMP0, TMP1, FRAME_TYPE
- | b <1
- break;
-
- case BC_ITERC:
- | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8))
- | subi RA, RA, 24 // evldd doesn't support neg. offsets.
- | mr TMP2, BASE
- | evlddx LFUNC:RB, BASE, RA
- | add BASE, BASE, RA
- | evldd TMP0, 8(BASE)
- | evldd TMP1, 16(BASE)
- | evstdd LFUNC:RB, 24(BASE) // Copy callable.
- | checkfunc LFUNC:RB
- | evstdd TMP0, 32(BASE) // Copy state.
- | li NARGS8:RC, 16 // Iterators get 2 arguments.
- | evstdd TMP1, 40(BASE) // Copy control var.
- | addi BASE, BASE, 32
- | checkfail ->vmeta_call
- | ins_call
- break;
-
- case BC_ITERN:
- | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8)
- |.if JIT
- | // NYI: add hotloop, record BC_ITERN.
- |.endif
- | add RA, BASE, RA
- | lwz TAB:RB, -12(RA)
- | lwz RC, -4(RA) // Get index from control var.
- | lwz TMP0, TAB:RB->asize
- | lwz TMP1, TAB:RB->array
- | addi PC, PC, 4
- |1: // Traverse array part.
- | cmplw RC, TMP0
- | slwi TMP3, RC, 3
- | bge >5 // Index points after array part?
- | evlddx TMP2, TMP1, TMP3
- | checknil TMP2
- | lwz INS, -4(PC)
- | checkok >4
- | efdcfsi TMP0, RC
- | addi RC, RC, 1
- | addis TMP3, PC, -(BCBIAS_J*4 >> 16)
- | evstdd TMP2, 8(RA)
- | decode_RD4 TMP1, INS
- | stw RC, -4(RA) // Update control var.
- | add PC, TMP1, TMP3
- | evstdd TMP0, 0(RA)
- |3:
- | ins_next
- |
- |4: // Skip holes in array part.
- | addi RC, RC, 1
- | b <1
- |
- |5: // Traverse hash part.
- | lwz TMP1, TAB:RB->hmask
- | sub RC, RC, TMP0
- | lwz TMP2, TAB:RB->node
- |6:
- | cmplw RC, TMP1 // End of iteration? Branch to ITERL+1.
- | slwi TMP3, RC, 5
- | bgt <3
- | slwi RB, RC, 3
- | sub TMP3, TMP3, RB
- | evlddx RB, TMP2, TMP3
- | add NODE:TMP3, TMP2, TMP3
- | checknil RB
- | lwz INS, -4(PC)
- | checkok >7
- | evldd TMP3, NODE:TMP3->key
- | addis TMP2, PC, -(BCBIAS_J*4 >> 16)
- | evstdd RB, 8(RA)
- | add RC, RC, TMP0
- | decode_RD4 TMP1, INS
- | evstdd TMP3, 0(RA)
- | addi RC, RC, 1
- | add PC, TMP1, TMP2
- | stw RC, -4(RA) // Update control var.
- | b <3
- |
- |7: // Skip holes in hash part.
- | addi RC, RC, 1
- | b <6
- break;
-
- case BC_ISNEXT:
- | // RA = base*8, RD = target (points to ITERN)
- | add RA, BASE, RA
- | li TMP2, -24
- | evlddx CFUNC:TMP1, RA, TMP2
- | lwz TMP2, -16(RA)
- | lwz TMP3, -8(RA)
- | evmergehi TMP0, CFUNC:TMP1, CFUNC:TMP1
- | cmpwi cr0, TMP2, LJ_TTAB
- | cmpwi cr1, TMP0, LJ_TFUNC
- | cmpwi cr6, TMP3, LJ_TNIL
- | bne cr1, >5
- | lbz TMP1, CFUNC:TMP1->ffid
- | crand 4*cr0+eq, 4*cr0+eq, 4*cr6+eq
- | cmpwi cr7, TMP1, FF_next_N
- | srwi TMP0, RD, 1
- | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
- | add TMP3, PC, TMP0
- | bne cr0, >5
- | lus TMP1, 0xfffe
- | ori TMP1, TMP1, 0x7fff
- | stw ZERO, -4(RA) // Initialize control var.
- | stw TMP1, -8(RA)
- | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
- |1:
- | ins_next
- |5: // Despecialize bytecode if any of the checks fail.
- | li TMP0, BC_JMP
- | li TMP1, BC_ITERC
- | stb TMP0, -1(PC)
- | addis PC, TMP3, -(BCBIAS_J*4 >> 16)
- | stb TMP1, 3(PC)
- | b <1
- break;
-
- case BC_VARG:
- | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8
- | lwz TMP0, FRAME_PC(BASE)
- | add RC, BASE, RC
- | add RA, BASE, RA
- | addi RC, RC, FRAME_VARG
- | add TMP2, RA, RB
- | subi TMP3, BASE, 8 // TMP3 = vtop
- | sub RC, RC, TMP0 // RC = vbase
- | // Note: RC may now be even _above_ BASE if nargs was < numparams.
- | cmplwi cr1, RB, 0
- | sub. TMP1, TMP3, RC
- | beq cr1, >5 // Copy all varargs?
- | subi TMP2, TMP2, 16
- | ble >2 // No vararg slots?
- |1: // Copy vararg slots to destination slots.
- | evldd TMP0, 0(RC)
- | addi RC, RC, 8
- | evstdd TMP0, 0(RA)
- | cmplw RA, TMP2
- | cmplw cr1, RC, TMP3
- | bge >3 // All destination slots filled?
- | addi RA, RA, 8
- | blt cr1, <1 // More vararg slots?
- |2: // Fill up remainder with nil.
- | evstdd TISNIL, 0(RA)
- | cmplw RA, TMP2
- | addi RA, RA, 8
- | blt <2
- |3:
- | ins_next
- |
- |5: // Copy all varargs.
- | lwz TMP0, L->maxstack
- | li MULTRES, 8 // MULTRES = (0+1)*8
- | ble <3 // No vararg slots?
- | add TMP2, RA, TMP1
- | cmplw TMP2, TMP0
- | addi MULTRES, TMP1, 8
- | bgt >7
- |6:
- | evldd TMP0, 0(RC)
- | addi RC, RC, 8
- | evstdd TMP0, 0(RA)
- | cmplw RC, TMP3
- | addi RA, RA, 8
- | blt <6 // More vararg slots?
- | b <3
- |
- |7: // Grow stack for varargs.
- | mr CARG1, L
- | stw RA, L->top
- | sub SAVE0, RC, BASE // Need delta, because BASE may change.
- | stw BASE, L->base
- | sub RA, RA, BASE
- | stw PC, SAVE_PC
- | srwi CARG2, TMP1, 3
- | bl extern lj_state_growstack // (lua_State *L, int n)
- | lwz BASE, L->base
- | add RA, BASE, RA
- | add RC, BASE, SAVE0
- | subi TMP3, BASE, 8
- | b <6
- break;
-
- /* -- Returns ----------------------------------------------------------- */
-
- case BC_RETM:
- | // RA = results*8, RD = extra_nresults*8
- | add RD, RD, MULTRES // MULTRES >= 8, so RD >= 8.
- | // Fall through. Assumes BC_RET follows.
- break;
-
- case BC_RET:
- | // RA = results*8, RD = (nresults+1)*8
- | lwz PC, FRAME_PC(BASE)
- | add RA, BASE, RA
- | mr MULTRES, RD
- |1:
- | andi. TMP0, PC, FRAME_TYPE
- | xori TMP1, PC, FRAME_VARG
- | bne ->BC_RETV_Z
- |
- |->BC_RET_Z:
- | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return
- | lwz INS, -4(PC)
- | cmpwi RD, 8
- | subi TMP2, BASE, 8
- | subi RC, RD, 8
- | decode_RB8 RB, INS
- | beq >3
- | li TMP1, 0
- |2:
- | addi TMP3, TMP1, 8
- | evlddx TMP0, RA, TMP1
- | cmpw TMP3, RC
- | evstddx TMP0, TMP2, TMP1
- | beq >3
- | addi TMP1, TMP3, 8
- | evlddx TMP0, RA, TMP3
- | cmpw TMP1, RC
- | evstddx TMP0, TMP2, TMP3
- | bne <2
- |3:
- |5:
- | cmplw RB, RD
- | decode_RA8 RA, INS
- | bgt >6
- | sub BASE, TMP2, RA
- | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
- | ins_next1
- | lwz TMP1, LFUNC:TMP1->pc
- | lwz KBASE, PC2PROTO(k)(TMP1)
- | ins_next2
- |
- |6: // Fill up results with nil.
- | subi TMP1, RD, 8
- | addi RD, RD, 8
- | evstddx TISNIL, TMP2, TMP1
- | b <5
- |
- |->BC_RETV_Z: // Non-standard return case.
- | andi. TMP2, TMP1, FRAME_TYPEP
- | bne ->vm_return
- | // Return from vararg function: relocate BASE down.
- | sub BASE, BASE, TMP1
- | lwz PC, FRAME_PC(BASE)
- | b <1
- break;
-
- case BC_RET0: case BC_RET1:
- | // RA = results*8, RD = (nresults+1)*8
- | lwz PC, FRAME_PC(BASE)
- | add RA, BASE, RA
- | mr MULTRES, RD
- | andi. TMP0, PC, FRAME_TYPE
- | xori TMP1, PC, FRAME_VARG
- | bne ->BC_RETV_Z
- |
- | lwz INS, -4(PC)
- | subi TMP2, BASE, 8
- | decode_RB8 RB, INS
- if (op == BC_RET1) {
- | evldd TMP0, 0(RA)
- | evstdd TMP0, 0(TMP2)
- }
- |5:
- | cmplw RB, RD
- | decode_RA8 RA, INS
- | bgt >6
- | sub BASE, TMP2, RA
- | lwz LFUNC:TMP1, FRAME_FUNC(BASE)
- | ins_next1
- | lwz TMP1, LFUNC:TMP1->pc
- | lwz KBASE, PC2PROTO(k)(TMP1)
- | ins_next2
- |
- |6: // Fill up results with nil.
- | subi TMP1, RD, 8
- | addi RD, RD, 8
- | evstddx TISNIL, TMP2, TMP1
- | b <5
- break;
-
- /* -- Loops and branches ------------------------------------------------ */
-
- case BC_FORL:
- |.if JIT
- | hotloop
- |.endif
- | // Fall through. Assumes BC_IFORL follows.
- break;
-
- case BC_JFORI:
- case BC_JFORL:
-#if !LJ_HASJIT
- break;
-#endif
- case BC_FORI:
- case BC_IFORL:
- | // RA = base*8, RD = target (after end of loop or start of loop)
- vk = (op == BC_IFORL || op == BC_JFORL);
- | add RA, BASE, RA
- | evldd TMP1, FORL_IDX*8(RA)
- | evldd TMP3, FORL_STEP*8(RA)
- | evldd TMP2, FORL_STOP*8(RA)
- if (!vk) {
- | evcmpgtu cr0, TMP1, TISNUM
- | evcmpgtu cr7, TMP3, TISNUM
- | evcmpgtu cr1, TMP2, TISNUM
- | cror 4*cr0+lt, 4*cr0+lt, 4*cr7+lt
- | cror 4*cr0+lt, 4*cr0+lt, 4*cr1+lt
- | blt ->vmeta_for
- }
- if (vk) {
- | efdadd TMP1, TMP1, TMP3
- | evstdd TMP1, FORL_IDX*8(RA)
- }
- | evcmpgts TMP3, TISNIL
- | evstdd TMP1, FORL_EXT*8(RA)
- | bge >2
- | efdcmpgt TMP1, TMP2
- |1:
- if (op != BC_JFORL) {
- | srwi RD, RD, 1
- | add RD, PC, RD
- if (op == BC_JFORI) {
- | addis PC, RD, -(BCBIAS_J*4 >> 16)
- } else {
- | addis RD, RD, -(BCBIAS_J*4 >> 16)
- }
- }
- if (op == BC_FORI) {
- | iselgt PC, RD, PC
- } else if (op == BC_IFORL) {
- | iselgt PC, PC, RD
- } else {
- | ble =>BC_JLOOP
- }
- | ins_next
- |2:
- | efdcmpgt TMP2, TMP1
- | b <1
- break;
-
- case BC_ITERL:
- |.if JIT
- | hotloop
- |.endif
- | // Fall through. Assumes BC_IITERL follows.
- break;
-
- case BC_JITERL:
-#if !LJ_HASJIT
- break;
-#endif
- case BC_IITERL:
- | // RA = base*8, RD = target
- | evlddx TMP1, BASE, RA
- | subi RA, RA, 8
- | checknil TMP1
- | checkok >1 // Stop if iterator returned nil.
- if (op == BC_JITERL) {
- | NYI
- } else {
- | branch_RD // Otherwise save control var + branch.
- | evstddx TMP1, BASE, RA
- }
- |1:
- | ins_next
- break;
-
- case BC_LOOP:
- | // RA = base*8, RD = target (loop extent)
- | // Note: RA/RD is only used by trace recorder to determine scope/extent
- | // This opcode does NOT jump, it's only purpose is to detect a hot loop.
- |.if JIT
- | hotloop
- |.endif
- | // Fall through. Assumes BC_ILOOP follows.
- break;
-
- case BC_ILOOP:
- | // RA = base*8, RD = target (loop extent)
- | ins_next
- break;
-
- case BC_JLOOP:
- |.if JIT
- | NYI
- |.endif
- break;
-
- case BC_JMP:
- | // RA = base*8 (only used by trace recorder), RD = target
- | branch_RD
- | ins_next
- break;
-
- /* -- Function headers -------------------------------------------------- */
-
- case BC_FUNCF:
- |.if JIT
- | hotcall
- |.endif
- case BC_FUNCV: /* NYI: compiled vararg functions. */
- | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow.
- break;
-
- case BC_JFUNCF:
-#if !LJ_HASJIT
- break;
-#endif
- case BC_IFUNCF:
- | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
- | lwz TMP2, L->maxstack
- | lbz TMP1, -4+PC2PROTO(numparams)(PC)
- | lwz KBASE, -4+PC2PROTO(k)(PC)
- | cmplw RA, TMP2
- | slwi TMP1, TMP1, 3
- | bgt ->vm_growstack_l
- | ins_next1
- |2:
- | cmplw NARGS8:RC, TMP1 // Check for missing parameters.
- | ble >3
- if (op == BC_JFUNCF) {
- | NYI
- } else {
- | ins_next2
- }
- |
- |3: // Clear missing parameters.
- | evstddx TISNIL, BASE, NARGS8:RC
- | addi NARGS8:RC, NARGS8:RC, 8
- | b <2
- break;
-
- case BC_JFUNCV:
-#if !LJ_HASJIT
- break;
-#endif
- | NYI // NYI: compiled vararg functions
- break; /* NYI: compiled vararg functions. */
-
- case BC_IFUNCV:
- | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8
- | lwz TMP2, L->maxstack
- | add TMP1, BASE, RC
- | add TMP0, RA, RC
- | stw LFUNC:RB, 4(TMP1) // Store copy of LFUNC.
- | addi TMP3, RC, 8+FRAME_VARG
- | lwz KBASE, -4+PC2PROTO(k)(PC)
- | cmplw TMP0, TMP2
- | stw TMP3, 0(TMP1) // Store delta + FRAME_VARG.
- | bge ->vm_growstack_l
- | lbz TMP2, -4+PC2PROTO(numparams)(PC)
- | mr RA, BASE
- | mr RC, TMP1
- | ins_next1
- | cmpwi TMP2, 0
- | addi BASE, TMP1, 8
- | beq >3
- |1:
- | cmplw RA, RC // Less args than parameters?
- | evldd TMP0, 0(RA)
- | bge >4
- | evstdd TISNIL, 0(RA) // Clear old fixarg slot (help the GC).
- | addi RA, RA, 8
- |2:
- | addic. TMP2, TMP2, -1
- | evstdd TMP0, 8(TMP1)
- | addi TMP1, TMP1, 8
- | bne <1
- |3:
- | ins_next2
- |
- |4: // Clear missing parameters.
- | evmr TMP0, TISNIL
- | b <2
- break;
-
- case BC_FUNCC:
- case BC_FUNCCW:
- | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8
- if (op == BC_FUNCC) {
- | lwz TMP3, CFUNC:RB->f
- } else {
- | lwz TMP3, DISPATCH_GL(wrapf)(DISPATCH)
- }
- | add TMP1, RA, NARGS8:RC
- | lwz TMP2, L->maxstack
- | add RC, BASE, NARGS8:RC
- | stw BASE, L->base
- | cmplw TMP1, TMP2
- | stw RC, L->top
- | li_vmstate C
- | mtctr TMP3
- if (op == BC_FUNCCW) {
- | lwz CARG2, CFUNC:RB->f
- }
- | mr CARG1, L
- | bgt ->vm_growstack_c // Need to grow stack.
- | st_vmstate
- | bctrl // (lua_State *L [, lua_CFunction f])
- | // Returns nresults.
- | lwz TMP1, L->top
- | slwi RD, CRET1, 3
- | lwz BASE, L->base
- | li_vmstate INTERP
- | lwz PC, FRAME_PC(BASE) // Fetch PC of caller.
- | sub RA, TMP1, RD // RA = L->top - nresults*8
- | st_vmstate
- | b ->vm_returnc
- break;
-
- /* ---------------------------------------------------------------------- */
-
- default:
- fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]);
- exit(2);
- break;
- }
-}
-
-static int build_backend(BuildCtx *ctx)
-{
- int op;
-
- dasm_growpc(Dst, BC__MAX);
-
- build_subroutines(ctx);
-
- |.code_op
- for (op = 0; op < BC__MAX; op++)
- build_ins(ctx, (BCOp)op, op);
-
- return BC__MAX;
-}
-
-/* Emit pseudo frame-info for all assembler functions. */
-static void emit_asm_debug(BuildCtx *ctx)
-{
- int i;
- switch (ctx->mode) {
- case BUILD_elfasm:
- fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n");
- fprintf(ctx->fp,
- ".Lframe0:\n"
- "\t.long .LECIE0-.LSCIE0\n"
- ".LSCIE0:\n"
- "\t.long 0xffffffff\n"
- "\t.byte 0x1\n"
- "\t.string \"\"\n"
- "\t.uleb128 0x1\n"
- "\t.sleb128 -4\n"
- "\t.byte 65\n"
- "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
- "\t.align 2\n"
- ".LECIE0:\n\n");
- fprintf(ctx->fp,
- ".LSFDE0:\n"
- "\t.long .LEFDE0-.LASFDE0\n"
- ".LASFDE0:\n"
- "\t.long .Lframe0\n"
- "\t.long .Lbegin\n"
- "\t.long %d\n"
- "\t.byte 0xe\n\t.uleb128 %d\n"
- "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
- "\t.byte 0x5\n\t.uleb128 70\n\t.sleb128 37\n",
- (int)ctx->codesz, CFRAME_SIZE);
- for (i = 14; i <= 31; i++)
- fprintf(ctx->fp,
- "\t.byte %d\n\t.uleb128 %d\n"
- "\t.byte 5\n\t.uleb128 %d\n\t.uleb128 %d\n",
- 0x80+i, 1+2*(31-i), 1200+i, 2+2*(31-i));
- fprintf(ctx->fp,
- "\t.align 2\n"
- ".LEFDE0:\n\n");
- fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n");
- fprintf(ctx->fp,
- ".Lframe1:\n"
- "\t.long .LECIE1-.LSCIE1\n"
- ".LSCIE1:\n"
- "\t.long 0\n"
- "\t.byte 0x1\n"
- "\t.string \"zPR\"\n"
- "\t.uleb128 0x1\n"
- "\t.sleb128 -4\n"
- "\t.byte 65\n"
- "\t.uleb128 6\n" /* augmentation length */
- "\t.byte 0x1b\n" /* pcrel|sdata4 */
- "\t.long lj_err_unwind_dwarf-.\n"
- "\t.byte 0x1b\n" /* pcrel|sdata4 */
- "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
- "\t.align 2\n"
- ".LECIE1:\n\n");
- fprintf(ctx->fp,
- ".LSFDE1:\n"
- "\t.long .LEFDE1-.LASFDE1\n"
- ".LASFDE1:\n"
- "\t.long .LASFDE1-.Lframe1\n"
- "\t.long .Lbegin-.\n"
- "\t.long %d\n"
- "\t.uleb128 0\n" /* augmentation length */
- "\t.byte 0xe\n\t.uleb128 %d\n"
- "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
- "\t.byte 0x5\n\t.uleb128 70\n\t.sleb128 37\n",
- (int)ctx->codesz, CFRAME_SIZE);
- for (i = 14; i <= 31; i++)
- fprintf(ctx->fp,
- "\t.byte %d\n\t.uleb128 %d\n"
- "\t.byte 5\n\t.uleb128 %d\n\t.uleb128 %d\n",
- 0x80+i, 1+2*(31-i), 1200+i, 2+2*(31-i));
- fprintf(ctx->fp,
- "\t.align 2\n"
- ".LEFDE1:\n\n");
- break;
- default:
- break;
- }
-}
-
+|// Low-level VM code for PowerPC/e500 CPUs. +|// Bytecode interpreter, fast functions and helper functions. +|// Copyright (C) 2005-2013 Mike Pall. See Copyright Notice in luajit.h +| +|.arch ppc +|.section code_op, code_sub +| +|.actionlist build_actionlist +|.globals GLOB_ +|.globalnames globnames +|.externnames extnames +| +|// Note: The ragged indentation of the instructions is intentional. +|// The starting columns indicate data dependencies. +| +|//----------------------------------------------------------------------- +| +|// Fixed register assignments for the interpreter. +|// Don't use: r1 = sp, r2 and r13 = reserved and/or small data area ptr +| +|// The following must be C callee-save (but BASE is often refetched). +|.define BASE, r14 // Base of current Lua stack frame. +|.define KBASE, r15 // Constants of current Lua function. +|.define PC, r16 // Next PC. +|.define DISPATCH, r17 // Opcode dispatch table. +|.define LREG, r18 // Register holding lua_State (also in SAVE_L). +|.define MULTRES, r19 // Size of multi-result: (nresults+1)*8. +| +|// Constants for vectorized type-comparisons (hi+low GPR). C callee-save. +|.define TISNUM, r22 +|.define TISSTR, r23 +|.define TISTAB, r24 +|.define TISFUNC, r25 +|.define TISNIL, r26 +|.define TOBIT, r27 +|.define ZERO, TOBIT // Zero in lo word. +| +|// The following temporaries are not saved across C calls, except for RA. +|.define RA, r20 // Callee-save. +|.define RB, r10 +|.define RC, r11 +|.define RD, r12 +|.define INS, r7 // Overlaps CARG5. +| +|.define TMP0, r0 +|.define TMP1, r8 +|.define TMP2, r9 +|.define TMP3, r6 // Overlaps CARG4. +| +|// Saved temporaries. +|.define SAVE0, r21 +| +|// Calling conventions. +|.define CARG1, r3 +|.define CARG2, r4 +|.define CARG3, r5 +|.define CARG4, r6 // Overlaps TMP3. +|.define CARG5, r7 // Overlaps INS. +| +|.define CRET1, r3 +|.define CRET2, r4 +| +|// Stack layout while in interpreter. Must match with lj_frame.h. +|.define SAVE_LR, 188(sp) +|.define CFRAME_SPACE, 184 // Delta for sp. +|// Back chain for sp: 184(sp) <-- sp entering interpreter +|.define SAVE_r31, 176(sp) // 64 bit register saves. +|.define SAVE_r30, 168(sp) +|.define SAVE_r29, 160(sp) +|.define SAVE_r28, 152(sp) +|.define SAVE_r27, 144(sp) +|.define SAVE_r26, 136(sp) +|.define SAVE_r25, 128(sp) +|.define SAVE_r24, 120(sp) +|.define SAVE_r23, 112(sp) +|.define SAVE_r22, 104(sp) +|.define SAVE_r21, 96(sp) +|.define SAVE_r20, 88(sp) +|.define SAVE_r19, 80(sp) +|.define SAVE_r18, 72(sp) +|.define SAVE_r17, 64(sp) +|.define SAVE_r16, 56(sp) +|.define SAVE_r15, 48(sp) +|.define SAVE_r14, 40(sp) +|.define SAVE_CR, 36(sp) +|.define UNUSED1, 32(sp) +|.define SAVE_ERRF, 28(sp) // 32 bit C frame info. +|.define SAVE_NRES, 24(sp) +|.define SAVE_CFRAME, 20(sp) +|.define SAVE_L, 16(sp) +|.define SAVE_PC, 12(sp) +|.define SAVE_MULTRES, 8(sp) +|// Next frame lr: 4(sp) +|// Back chain for sp: 0(sp) <-- sp while in interpreter +| +|.macro save_, reg; evstdd reg, SAVE_..reg; .endmacro +|.macro rest_, reg; evldd reg, SAVE_..reg; .endmacro +| +|.macro saveregs +| stwu sp, -CFRAME_SPACE(sp) +| save_ r14; save_ r15; save_ r16; save_ r17; save_ r18; save_ r19 +| mflr r0; mfcr r12 +| save_ r20; save_ r21; save_ r22; save_ r23; save_ r24; save_ r25 +| stw r0, SAVE_LR; stw r12, SAVE_CR +| save_ r26; save_ r27; save_ r28; save_ r29; save_ r30; save_ r31 +|.endmacro +| +|.macro restoreregs +| lwz r0, SAVE_LR; lwz r12, SAVE_CR +| rest_ r14; rest_ r15; rest_ r16; rest_ r17; rest_ r18; rest_ r19 +| mtlr r0; mtcrf 0x38, r12 +| rest_ r20; rest_ r21; rest_ r22; rest_ r23; rest_ r24; rest_ r25 +| rest_ r26; rest_ r27; rest_ r28; rest_ r29; rest_ r30; rest_ r31 +| addi sp, sp, CFRAME_SPACE +|.endmacro +| +|// Type definitions. Some of these are only used for documentation. +|.type L, lua_State, LREG +|.type GL, global_State +|.type TVALUE, TValue +|.type GCOBJ, GCobj +|.type STR, GCstr +|.type TAB, GCtab +|.type LFUNC, GCfuncL +|.type CFUNC, GCfuncC +|.type PROTO, GCproto +|.type UPVAL, GCupval +|.type NODE, Node +|.type NARGS8, int +|.type TRACE, GCtrace +| +|//----------------------------------------------------------------------- +| +|// These basic macros should really be part of DynASM. +|.macro srwi, rx, ry, n; rlwinm rx, ry, 32-n, n, 31; .endmacro +|.macro slwi, rx, ry, n; rlwinm rx, ry, n, 0, 31-n; .endmacro +|.macro rotlwi, rx, ry, n; rlwinm rx, ry, n, 0, 31; .endmacro +|.macro rotlw, rx, ry, rn; rlwnm rx, ry, rn, 0, 31; .endmacro +|.macro subi, rx, ry, i; addi rx, ry, -i; .endmacro +| +|// Trap for not-yet-implemented parts. +|.macro NYI; tw 4, sp, sp; .endmacro +| +|//----------------------------------------------------------------------- +| +|// Access to frame relative to BASE. +|.define FRAME_PC, -8 +|.define FRAME_FUNC, -4 +| +|// Instruction decode. +|.macro decode_OP4, dst, ins; rlwinm dst, ins, 2, 22, 29; .endmacro +|.macro decode_RA8, dst, ins; rlwinm dst, ins, 27, 21, 28; .endmacro +|.macro decode_RB8, dst, ins; rlwinm dst, ins, 11, 21, 28; .endmacro +|.macro decode_RC8, dst, ins; rlwinm dst, ins, 19, 21, 28; .endmacro +|.macro decode_RD8, dst, ins; rlwinm dst, ins, 19, 13, 28; .endmacro +| +|.macro decode_OP1, dst, ins; rlwinm dst, ins, 0, 24, 31; .endmacro +|.macro decode_RD4, dst, ins; rlwinm dst, ins, 18, 14, 29; .endmacro +| +|// Instruction fetch. +|.macro ins_NEXT1 +| lwz INS, 0(PC) +| addi PC, PC, 4 +|.endmacro +|// Instruction decode+dispatch. +|.macro ins_NEXT2 +| decode_OP4 TMP1, INS +| decode_RB8 RB, INS +| decode_RD8 RD, INS +| lwzx TMP0, DISPATCH, TMP1 +| decode_RA8 RA, INS +| decode_RC8 RC, INS +| mtctr TMP0 +| bctr +|.endmacro +|.macro ins_NEXT +| ins_NEXT1 +| ins_NEXT2 +|.endmacro +| +|// Instruction footer. +|.if 1 +| // Replicated dispatch. Less unpredictable branches, but higher I-Cache use. +| .define ins_next, ins_NEXT +| .define ins_next_, ins_NEXT +| .define ins_next1, ins_NEXT1 +| .define ins_next2, ins_NEXT2 +|.else +| // Common dispatch. Lower I-Cache use, only one (very) unpredictable branch. +| // Affects only certain kinds of benchmarks (and only with -j off). +| .macro ins_next +| b ->ins_next +| .endmacro +| .macro ins_next1 +| .endmacro +| .macro ins_next2 +| b ->ins_next +| .endmacro +| .macro ins_next_ +| ->ins_next: +| ins_NEXT +| .endmacro +|.endif +| +|// Call decode and dispatch. +|.macro ins_callt +| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC +| lwz PC, LFUNC:RB->pc +| lwz INS, 0(PC) +| addi PC, PC, 4 +| decode_OP4 TMP1, INS +| decode_RA8 RA, INS +| lwzx TMP0, DISPATCH, TMP1 +| add RA, RA, BASE +| mtctr TMP0 +| bctr +|.endmacro +| +|.macro ins_call +| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC +| stw PC, FRAME_PC(BASE) +| ins_callt +|.endmacro +| +|//----------------------------------------------------------------------- +| +|// Macros to test operand types. +|.macro checknum, reg; evcmpltu reg, TISNUM; .endmacro +|.macro checkstr, reg; evcmpeq reg, TISSTR; .endmacro +|.macro checktab, reg; evcmpeq reg, TISTAB; .endmacro +|.macro checkfunc, reg; evcmpeq reg, TISFUNC; .endmacro +|.macro checknil, reg; evcmpeq reg, TISNIL; .endmacro +|.macro checkok, label; blt label; .endmacro +|.macro checkfail, label; bge label; .endmacro +|.macro checkanyfail, label; bns label; .endmacro +|.macro checkallok, label; bso label; .endmacro +| +|.macro branch_RD +| srwi TMP0, RD, 1 +| add PC, PC, TMP0 +| addis PC, PC, -(BCBIAS_J*4 >> 16) +|.endmacro +| +|// Assumes DISPATCH is relative to GL. +#define DISPATCH_GL(field) (GG_DISP2G + (int)offsetof(global_State, field)) +#define DISPATCH_J(field) (GG_DISP2J + (int)offsetof(jit_State, field)) +| +#define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto)) +| +|.macro hotloop +| NYI +|.endmacro +| +|.macro hotcall +| NYI +|.endmacro +| +|// Set current VM state. Uses TMP0. +|.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro +|.macro st_vmstate; stw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro +| +|// Move table write barrier back. Overwrites mark and tmp. +|.macro barrierback, tab, mark, tmp +| lwz tmp, DISPATCH_GL(gc.grayagain)(DISPATCH) +| // Assumes LJ_GC_BLACK is 0x04. +| rlwinm mark, mark, 0, 30, 28 // black2gray(tab) +| stw tab, DISPATCH_GL(gc.grayagain)(DISPATCH) +| stb mark, tab->marked +| stw tmp, tab->gclist +|.endmacro +| +|//----------------------------------------------------------------------- + +/* Generate subroutines used by opcodes and other parts of the VM. */ +/* The .code_sub section should be last to help static branch prediction. */ +static void build_subroutines(BuildCtx *ctx) +{ + |.code_sub + | + |//----------------------------------------------------------------------- + |//-- Return handling ---------------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_returnp: + | // See vm_return. Also: TMP2 = previous base. + | andi. TMP0, PC, FRAME_P + | evsplati TMP1, LJ_TTRUE + | beq ->cont_dispatch + | + | // Return from pcall or xpcall fast func. + | lwz PC, FRAME_PC(TMP2) // Fetch PC of previous frame. + | mr BASE, TMP2 // Restore caller base. + | // Prepending may overwrite the pcall frame, so do it at the end. + | stwu TMP1, FRAME_PC(RA) // Prepend true to results. + | + |->vm_returnc: + | addi RD, RD, 8 // RD = (nresults+1)*8. + | andi. TMP0, PC, FRAME_TYPE + | cmpwi cr1, RD, 0 + | li CRET1, LUA_YIELD + | beq cr1, ->vm_unwind_c_eh + | mr MULTRES, RD + | beq ->BC_RET_Z // Handle regular return to Lua. + | + |->vm_return: + | // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return + | // TMP0 = PC & FRAME_TYPE + | cmpwi TMP0, FRAME_C + | rlwinm TMP2, PC, 0, 0, 28 + | li_vmstate C + | sub TMP2, BASE, TMP2 // TMP2 = previous base. + | bne ->vm_returnp + | + | addic. TMP1, RD, -8 + | stw TMP2, L->base + | lwz TMP2, SAVE_NRES + | subi BASE, BASE, 8 + | st_vmstate + | slwi TMP2, TMP2, 3 + | beq >2 + |1: + | addic. TMP1, TMP1, -8 + | evldd TMP0, 0(RA) + | addi RA, RA, 8 + | evstdd TMP0, 0(BASE) + | addi BASE, BASE, 8 + | bne <1 + | + |2: + | cmpw TMP2, RD // More/less results wanted? + | bne >6 + |3: + | stw BASE, L->top // Store new top. + | + |->vm_leave_cp: + | lwz TMP0, SAVE_CFRAME // Restore previous C frame. + | li CRET1, 0 // Ok return status for vm_pcall. + | stw TMP0, L->cframe + | + |->vm_leave_unw: + | restoreregs + | blr + | + |6: + | ble >7 // Less results wanted? + | // More results wanted. Check stack size and fill up results with nil. + | lwz TMP1, L->maxstack + | cmplw BASE, TMP1 + | bge >8 + | evstdd TISNIL, 0(BASE) + | addi RD, RD, 8 + | addi BASE, BASE, 8 + | b <2 + | + |7: // Less results wanted. + | sub TMP0, RD, TMP2 + | cmpwi TMP2, 0 // LUA_MULTRET+1 case? + | sub TMP0, BASE, TMP0 // Subtract the difference. + | iseleq BASE, BASE, TMP0 // Either keep top or shrink it. + | b <3 + | + |8: // Corner case: need to grow stack for filling up results. + | // This can happen if: + | // - A C function grows the stack (a lot). + | // - The GC shrinks the stack in between. + | // - A return back from a lua_call() with (high) nresults adjustment. + | stw BASE, L->top // Save current top held in BASE (yes). + | mr SAVE0, RD + | mr CARG2, TMP2 + | mr CARG1, L + | bl extern lj_state_growstack // (lua_State *L, int n) + | lwz TMP2, SAVE_NRES + | mr RD, SAVE0 + | slwi TMP2, TMP2, 3 + | lwz BASE, L->top // Need the (realloced) L->top in BASE. + | b <2 + | + |->vm_unwind_c: // Unwind C stack, return from vm_pcall. + | // (void *cframe, int errcode) + | mr sp, CARG1 + | mr CRET1, CARG2 + |->vm_unwind_c_eh: // Landing pad for external unwinder. + | lwz L, SAVE_L + | li TMP0, ~LJ_VMST_C + | lwz GL:TMP1, L->glref + | stw TMP0, GL:TMP1->vmstate + | b ->vm_leave_unw + | + |->vm_unwind_ff: // Unwind C stack, return from ff pcall. + | // (void *cframe) + | rlwinm sp, CARG1, 0, 0, 29 + |->vm_unwind_ff_eh: // Landing pad for external unwinder. + | lwz L, SAVE_L + | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants. + | evsplati TISFUNC, LJ_TFUNC + | lus TOBIT, 0x4338 + | evsplati TISTAB, LJ_TTAB + | li TMP0, 0 + | lwz BASE, L->base + | evmergelo TOBIT, TOBIT, TMP0 + | lwz DISPATCH, L->glref // Setup pointer to dispatch table. + | evsplati TISSTR, LJ_TSTR + | li TMP1, LJ_TFALSE + | evsplati TISNIL, LJ_TNIL + | li_vmstate INTERP + | lwz PC, FRAME_PC(BASE) // Fetch PC of previous frame. + | la RA, -8(BASE) // Results start at BASE-8. + | addi DISPATCH, DISPATCH, GG_G2DISP + | stw TMP1, 0(RA) // Prepend false to error message. + | li RD, 16 // 2 results: false + error message. + | st_vmstate + | b ->vm_returnc + | + |//----------------------------------------------------------------------- + |//-- Grow stack for calls ----------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_growstack_c: // Grow stack for C function. + | li CARG2, LUA_MINSTACK + | b >2 + | + |->vm_growstack_l: // Grow stack for Lua function. + | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC + | add RC, BASE, RC + | sub RA, RA, BASE + | stw BASE, L->base + | addi PC, PC, 4 // Must point after first instruction. + | stw RC, L->top + | srwi CARG2, RA, 3 + |2: + | // L->base = new base, L->top = top + | stw PC, SAVE_PC + | mr CARG1, L + | bl extern lj_state_growstack // (lua_State *L, int n) + | lwz BASE, L->base + | lwz RC, L->top + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | sub RC, RC, BASE + | // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC + | ins_callt // Just retry the call. + | + |//----------------------------------------------------------------------- + |//-- Entry points into the assembler VM --------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_resume: // Setup C frame and resume thread. + | // (lua_State *L, TValue *base, int nres1 = 0, ptrdiff_t ef = 0) + | saveregs + | mr L, CARG1 + | lwz DISPATCH, L->glref // Setup pointer to dispatch table. + | mr BASE, CARG2 + | lbz TMP1, L->status + | stw L, SAVE_L + | li PC, FRAME_CP + | addi TMP0, sp, CFRAME_RESUME + | addi DISPATCH, DISPATCH, GG_G2DISP + | stw CARG3, SAVE_NRES + | cmplwi TMP1, 0 + | stw CARG3, SAVE_ERRF + | stw TMP0, L->cframe + | stw CARG3, SAVE_CFRAME + | stw CARG1, SAVE_PC // Any value outside of bytecode is ok. + | beq >3 + | + | // Resume after yield (like a return). + | mr RA, BASE + | lwz BASE, L->base + | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants. + | lwz TMP1, L->top + | evsplati TISFUNC, LJ_TFUNC + | lus TOBIT, 0x4338 + | evsplati TISTAB, LJ_TTAB + | lwz PC, FRAME_PC(BASE) + | li TMP2, 0 + | evsplati TISSTR, LJ_TSTR + | sub RD, TMP1, BASE + | evmergelo TOBIT, TOBIT, TMP2 + | stb CARG3, L->status + | andi. TMP0, PC, FRAME_TYPE + | li_vmstate INTERP + | addi RD, RD, 8 + | evsplati TISNIL, LJ_TNIL + | mr MULTRES, RD + | st_vmstate + | beq ->BC_RET_Z + | b ->vm_return + | + |->vm_pcall: // Setup protected C frame and enter VM. + | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef) + | saveregs + | li PC, FRAME_CP + | stw CARG4, SAVE_ERRF + | b >1 + | + |->vm_call: // Setup C frame and enter VM. + | // (lua_State *L, TValue *base, int nres1) + | saveregs + | li PC, FRAME_C + | + |1: // Entry point for vm_pcall above (PC = ftype). + | lwz TMP1, L:CARG1->cframe + | stw CARG3, SAVE_NRES + | mr L, CARG1 + | stw CARG1, SAVE_L + | mr BASE, CARG2 + | stw sp, L->cframe // Add our C frame to cframe chain. + | lwz DISPATCH, L->glref // Setup pointer to dispatch table. + | stw CARG1, SAVE_PC // Any value outside of bytecode is ok. + | stw TMP1, SAVE_CFRAME + | addi DISPATCH, DISPATCH, GG_G2DISP + | + |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype). + | lwz TMP2, L->base // TMP2 = old base (used in vmeta_call). + | evsplati TISNUM, LJ_TISNUM+1 // Setup type comparison constants. + | lwz TMP1, L->top + | evsplati TISFUNC, LJ_TFUNC + | add PC, PC, BASE + | evsplati TISTAB, LJ_TTAB + | lus TOBIT, 0x4338 + | li TMP0, 0 + | sub PC, PC, TMP2 // PC = frame delta + frame type + | evsplati TISSTR, LJ_TSTR + | sub NARGS8:RC, TMP1, BASE + | evmergelo TOBIT, TOBIT, TMP0 + | li_vmstate INTERP + | evsplati TISNIL, LJ_TNIL + | st_vmstate + | + |->vm_call_dispatch: + | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC + | li TMP0, -8 + | evlddx LFUNC:RB, BASE, TMP0 + | checkfunc LFUNC:RB + | checkfail ->vmeta_call + | + |->vm_call_dispatch_f: + | ins_call + | // BASE = new base, RB = func, RC = nargs*8, PC = caller PC + | + |->vm_cpcall: // Setup protected C frame, call C. + | // (lua_State *L, lua_CFunction func, void *ud, lua_CPFunction cp) + | saveregs + | mr L, CARG1 + | lwz TMP0, L:CARG1->stack + | stw CARG1, SAVE_L + | lwz TMP1, L->top + | stw CARG1, SAVE_PC // Any value outside of bytecode is ok. + | sub TMP0, TMP0, TMP1 // Compute -savestack(L, L->top). + | lwz TMP1, L->cframe + | stw sp, L->cframe // Add our C frame to cframe chain. + | li TMP2, 0 + | stw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame. + | stw TMP2, SAVE_ERRF // No error function. + | stw TMP1, SAVE_CFRAME + | mtctr CARG4 + | bctrl // (lua_State *L, lua_CFunction func, void *ud) + | mr. BASE, CRET1 + | lwz DISPATCH, L->glref // Setup pointer to dispatch table. + | li PC, FRAME_CP + | addi DISPATCH, DISPATCH, GG_G2DISP + | bne <3 // Else continue with the call. + | b ->vm_leave_cp // No base? Just remove C frame. + | + |//----------------------------------------------------------------------- + |//-- Metamethod handling ------------------------------------------------ + |//----------------------------------------------------------------------- + | + |// The lj_meta_* functions (except for lj_meta_cat) don't reallocate the + |// stack, so BASE doesn't need to be reloaded across these calls. + | + |//-- Continuation dispatch ---------------------------------------------- + | + |->cont_dispatch: + | // BASE = meta base, RA = resultptr, RD = (nresults+1)*8 + | lwz TMP0, -12(BASE) // Continuation. + | mr RB, BASE + | mr BASE, TMP2 // Restore caller BASE. + | lwz LFUNC:TMP1, FRAME_FUNC(TMP2) + | cmplwi TMP0, 0 + | lwz PC, -16(RB) // Restore PC from [cont|PC]. + | beq >1 + | subi TMP2, RD, 8 + | lwz TMP1, LFUNC:TMP1->pc + | evstddx TISNIL, RA, TMP2 // Ensure one valid arg. + | lwz KBASE, PC2PROTO(k)(TMP1) + | // BASE = base, RA = resultptr, RB = meta base + | mtctr TMP0 + | bctr // Jump to continuation. + | + |1: // Tail call from C function. + | subi TMP1, RB, 16 + | sub RC, TMP1, BASE + | b ->vm_call_tail + | + |->cont_cat: // RA = resultptr, RB = meta base + | lwz INS, -4(PC) + | subi CARG2, RB, 16 + | decode_RB8 SAVE0, INS + | evldd TMP0, 0(RA) + | add TMP1, BASE, SAVE0 + | stw BASE, L->base + | cmplw TMP1, CARG2 + | sub CARG3, CARG2, TMP1 + | decode_RA8 RA, INS + | evstdd TMP0, 0(CARG2) + | bne ->BC_CAT_Z + | evstddx TMP0, BASE, RA + | b ->cont_nop + | + |//-- Table indexing metamethods ----------------------------------------- + | + |->vmeta_tgets1: + | evmergelo STR:RC, TISSTR, STR:RC + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | decode_RB8 RB, INS + | evstdd STR:RC, 0(CARG3) + | add CARG2, BASE, RB + | b >1 + | + |->vmeta_tgets: + | evmergelo TAB:RB, TISTAB, TAB:RB + | la CARG2, DISPATCH_GL(tmptv)(DISPATCH) + | evmergelo STR:RC, TISSTR, STR:RC + | evstdd TAB:RB, 0(CARG2) + | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH) + | evstdd STR:RC, 0(CARG3) + | b >1 + | + |->vmeta_tgetb: // TMP0 = index + | efdcfsi TMP0, TMP0 + | decode_RB8 RB, INS + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | add CARG2, BASE, RB + | evstdd TMP0, 0(CARG3) + | b >1 + | + |->vmeta_tgetv: + | decode_RB8 RB, INS + | decode_RC8 RC, INS + | add CARG2, BASE, RB + | add CARG3, BASE, RC + |1: + | stw BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_tget // (lua_State *L, TValue *o, TValue *k) + | // Returns TValue * (finished) or NULL (metamethod). + | cmplwi CRET1, 0 + | beq >3 + | evldd TMP0, 0(CRET1) + | evstddx TMP0, BASE, RA + | ins_next + | + |3: // Call __index metamethod. + | // BASE = base, L->top = new base, stack = cont/func/t/k + | subfic TMP1, BASE, FRAME_CONT + | lwz BASE, L->top + | stw PC, -16(BASE) // [cont|PC] + | add PC, TMP1, BASE + | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | li NARGS8:RC, 16 // 2 args for func(t, k). + | b ->vm_call_dispatch_f + | + |//----------------------------------------------------------------------- + | + |->vmeta_tsets1: + | evmergelo STR:RC, TISSTR, STR:RC + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | decode_RB8 RB, INS + | evstdd STR:RC, 0(CARG3) + | add CARG2, BASE, RB + | b >1 + | + |->vmeta_tsets: + | evmergelo TAB:RB, TISTAB, TAB:RB + | la CARG2, DISPATCH_GL(tmptv)(DISPATCH) + | evmergelo STR:RC, TISSTR, STR:RC + | evstdd TAB:RB, 0(CARG2) + | la CARG3, DISPATCH_GL(tmptv2)(DISPATCH) + | evstdd STR:RC, 0(CARG3) + | b >1 + | + |->vmeta_tsetb: // TMP0 = index + | efdcfsi TMP0, TMP0 + | decode_RB8 RB, INS + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | add CARG2, BASE, RB + | evstdd TMP0, 0(CARG3) + | b >1 + | + |->vmeta_tsetv: + | decode_RB8 RB, INS + | decode_RC8 RC, INS + | add CARG2, BASE, RB + | add CARG3, BASE, RC + |1: + | stw BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_tset // (lua_State *L, TValue *o, TValue *k) + | // Returns TValue * (finished) or NULL (metamethod). + | cmplwi CRET1, 0 + | evlddx TMP0, BASE, RA + | beq >3 + | // NOBARRIER: lj_meta_tset ensures the table is not black. + | evstdd TMP0, 0(CRET1) + | ins_next + | + |3: // Call __newindex metamethod. + | // BASE = base, L->top = new base, stack = cont/func/t/k/(v) + | subfic TMP1, BASE, FRAME_CONT + | lwz BASE, L->top + | stw PC, -16(BASE) // [cont|PC] + | add PC, TMP1, BASE + | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | li NARGS8:RC, 24 // 3 args for func(t, k, v) + | evstdd TMP0, 16(BASE) // Copy value to third argument. + | b ->vm_call_dispatch_f + | + |//-- Comparison metamethods --------------------------------------------- + | + |->vmeta_comp: + | mr CARG1, L + | subi PC, PC, 4 + | add CARG2, BASE, RA + | stw PC, SAVE_PC + | add CARG3, BASE, RD + | stw BASE, L->base + | decode_OP1 CARG4, INS + | bl extern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op) + | // Returns 0/1 or TValue * (metamethod). + |3: + | cmplwi CRET1, 1 + | bgt ->vmeta_binop + |4: + | lwz INS, 0(PC) + | addi PC, PC, 4 + | decode_RD4 TMP2, INS + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | add TMP2, TMP2, TMP3 + | isellt PC, PC, TMP2 + |->cont_nop: + | ins_next + | + |->cont_ra: // RA = resultptr + | lwz INS, -4(PC) + | evldd TMP0, 0(RA) + | decode_RA8 TMP1, INS + | evstddx TMP0, BASE, TMP1 + | b ->cont_nop + | + |->cont_condt: // RA = resultptr + | lwz TMP0, 0(RA) + | li TMP1, LJ_TTRUE + | cmplw TMP1, TMP0 // Branch if result is true. + | b <4 + | + |->cont_condf: // RA = resultptr + | lwz TMP0, 0(RA) + | li TMP1, LJ_TFALSE + | cmplw TMP0, TMP1 // Branch if result is false. + | b <4 + | + |->vmeta_equal: + | // CARG2, CARG3, CARG4 are already set by BC_ISEQV/BC_ISNEV. + | subi PC, PC, 4 + | stw BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne) + | // Returns 0/1 or TValue * (metamethod). + | b <3 + | + |//-- Arithmetic metamethods --------------------------------------------- + | + |->vmeta_arith_vn: + | add CARG3, BASE, RB + | add CARG4, KBASE, RC + | b >1 + | + |->vmeta_arith_nv: + | add CARG3, KBASE, RC + | add CARG4, BASE, RB + | b >1 + | + |->vmeta_unm: + | add CARG3, BASE, RD + | mr CARG4, CARG3 + | b >1 + | + |->vmeta_arith_vv: + | add CARG3, BASE, RB + | add CARG4, BASE, RC + |1: + | add CARG2, BASE, RA + | stw BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | decode_OP1 CARG5, INS // Caveat: CARG5 overlaps INS. + | bl extern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op) + | // Returns NULL (finished) or TValue * (metamethod). + | cmplwi CRET1, 0 + | beq ->cont_nop + | + | // Call metamethod for binary op. + |->vmeta_binop: + | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2 + | sub TMP1, CRET1, BASE + | stw PC, -16(CRET1) // [cont|PC] + | mr TMP2, BASE + | addi PC, TMP1, FRAME_CONT + | mr BASE, CRET1 + | li NARGS8:RC, 16 // 2 args for func(o1, o2). + | b ->vm_call_dispatch + | + |->vmeta_len: +#if LJ_52 + | mr SAVE0, CARG1 +#endif + | add CARG2, BASE, RD + | stw BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | bl extern lj_meta_len // (lua_State *L, TValue *o) + | // Returns NULL (retry) or TValue * (metamethod base). +#if LJ_52 + | cmplwi CRET1, 0 + | bne ->vmeta_binop // Binop call for compatibility. + | mr CARG1, SAVE0 + | b ->BC_LEN_Z +#else + | b ->vmeta_binop // Binop call for compatibility. +#endif + | + |//-- Call metamethod ---------------------------------------------------- + | + |->vmeta_call: // Resolve and call __call metamethod. + | // TMP2 = old base, BASE = new base, RC = nargs*8 + | mr CARG1, L + | stw TMP2, L->base // This is the callers base! + | subi CARG2, BASE, 8 + | stw PC, SAVE_PC + | add CARG3, BASE, RC + | mr SAVE0, NARGS8:RC + | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top) + | lwz LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | addi NARGS8:RC, SAVE0, 8 // Got one more argument now. + | ins_call + | + |->vmeta_callt: // Resolve __call for BC_CALLT. + | // BASE = old base, RA = new base, RC = nargs*8 + | mr CARG1, L + | stw BASE, L->base + | subi CARG2, RA, 8 + | stw PC, SAVE_PC + | add CARG3, RA, RC + | mr SAVE0, NARGS8:RC + | bl extern lj_meta_call // (lua_State *L, TValue *func, TValue *top) + | lwz TMP1, FRAME_PC(BASE) + | addi NARGS8:RC, SAVE0, 8 // Got one more argument now. + | lwz LFUNC:RB, FRAME_FUNC(RA) // Guaranteed to be a function here. + | b ->BC_CALLT_Z + | + |//-- Argument coercion for 'for' statement ------------------------------ + | + |->vmeta_for: + | mr CARG1, L + | stw BASE, L->base + | mr CARG2, RA + | stw PC, SAVE_PC + | mr SAVE0, INS + | bl extern lj_meta_for // (lua_State *L, TValue *base) + |.if JIT + | decode_OP1 TMP0, SAVE0 + |.endif + | decode_RA8 RA, SAVE0 + |.if JIT + | cmpwi TMP0, BC_JFORI + |.endif + | decode_RD8 RD, SAVE0 + |.if JIT + | beq =>BC_JFORI + |.endif + | b =>BC_FORI + | + |//----------------------------------------------------------------------- + |//-- Fast functions ----------------------------------------------------- + |//----------------------------------------------------------------------- + | + |.macro .ffunc, name + |->ff_ .. name: + |.endmacro + | + |.macro .ffunc_1, name + |->ff_ .. name: + | cmplwi NARGS8:RC, 8 + | evldd CARG1, 0(BASE) + | blt ->fff_fallback + |.endmacro + | + |.macro .ffunc_2, name + |->ff_ .. name: + | cmplwi NARGS8:RC, 16 + | evldd CARG1, 0(BASE) + | evldd CARG2, 8(BASE) + | blt ->fff_fallback + |.endmacro + | + |.macro .ffunc_n, name + | .ffunc_1 name + | checknum CARG1 + | checkfail ->fff_fallback + |.endmacro + | + |.macro .ffunc_nn, name + | .ffunc_2 name + | evmergehi TMP0, CARG1, CARG2 + | checknum TMP0 + | checkanyfail ->fff_fallback + |.endmacro + | + |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1. + |.macro ffgccheck + | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH) + | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH) + | cmplw TMP0, TMP1 + | bgel ->fff_gcstep + |.endmacro + | + |//-- Base library: checks ----------------------------------------------- + | + |.ffunc assert + | cmplwi NARGS8:RC, 8 + | evldd TMP0, 0(BASE) + | blt ->fff_fallback + | evaddw TMP1, TISNIL, TISNIL // Synthesize LJ_TFALSE. + | la RA, -8(BASE) + | evcmpltu cr1, TMP0, TMP1 + | lwz PC, FRAME_PC(BASE) + | bge cr1, ->fff_fallback + | evstdd TMP0, 0(RA) + | addi RD, NARGS8:RC, 8 // Compute (nresults+1)*8. + | beq ->fff_res // Done if exactly 1 argument. + | li TMP1, 8 + | subi RC, RC, 8 + |1: + | cmplw TMP1, RC + | evlddx TMP0, BASE, TMP1 + | evstddx TMP0, RA, TMP1 + | addi TMP1, TMP1, 8 + | bne <1 + | b ->fff_res + | + |.ffunc type + | cmplwi NARGS8:RC, 8 + | lwz CARG1, 0(BASE) + | blt ->fff_fallback + | li TMP2, ~LJ_TNUMX + | cmplw CARG1, TISNUM + | not TMP1, CARG1 + | isellt TMP1, TMP2, TMP1 + | slwi TMP1, TMP1, 3 + | la TMP2, CFUNC:RB->upvalue + | evlddx STR:CRET1, TMP2, TMP1 + | b ->fff_restv + | + |//-- Base library: getters and setters --------------------------------- + | + |.ffunc_1 getmetatable + | checktab CARG1 + | evmergehi TMP1, CARG1, CARG1 + | checkfail >6 + |1: // Field metatable must be at same offset for GCtab and GCudata! + | lwz TAB:RB, TAB:CARG1->metatable + |2: + | evmr CRET1, TISNIL + | cmplwi TAB:RB, 0 + | lwz STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH) + | beq ->fff_restv + | lwz TMP0, TAB:RB->hmask + | evmergelo CRET1, TISTAB, TAB:RB // Use metatable as default result. + | lwz TMP1, STR:RC->hash + | lwz NODE:TMP2, TAB:RB->node + | evmergelo STR:RC, TISSTR, STR:RC + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | slwi TMP0, TMP1, 5 + | slwi TMP1, TMP1, 3 + | sub TMP1, TMP0, TMP1 + | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + |3: // Rearranged logic, because we expect _not_ to find the key. + | evldd TMP0, NODE:TMP2->key + | evldd TMP1, NODE:TMP2->val + | evcmpeq TMP0, STR:RC + | lwz NODE:TMP2, NODE:TMP2->next + | checkallok >5 + | cmplwi NODE:TMP2, 0 + | beq ->fff_restv // Not found, keep default result. + | b <3 + |5: + | checknil TMP1 + | checkok ->fff_restv // Ditto for nil value. + | evmr CRET1, TMP1 // Return value of mt.__metatable. + | b ->fff_restv + | + |6: + | cmpwi TMP1, LJ_TUDATA + | not TMP1, TMP1 + | beq <1 + | checknum CARG1 + | slwi TMP1, TMP1, 2 + | li TMP2, 4*~LJ_TNUMX + | isellt TMP1, TMP2, TMP1 + | la TMP2, DISPATCH_GL(gcroot[GCROOT_BASEMT])(DISPATCH) + | lwzx TAB:RB, TMP2, TMP1 + | b <2 + | + |.ffunc_2 setmetatable + | // Fast path: no mt for table yet and not clearing the mt. + | evmergehi TMP0, TAB:CARG1, TAB:CARG2 + | checktab TMP0 + | checkanyfail ->fff_fallback + | lwz TAB:TMP1, TAB:CARG1->metatable + | cmplwi TAB:TMP1, 0 + | lbz TMP3, TAB:CARG1->marked + | bne ->fff_fallback + | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table) + | stw TAB:CARG2, TAB:CARG1->metatable + | beq ->fff_restv + | barrierback TAB:CARG1, TMP3, TMP0 + | b ->fff_restv + | + |.ffunc rawget + | cmplwi NARGS8:RC, 16 + | evldd CARG2, 0(BASE) + | blt ->fff_fallback + | checktab CARG2 + | la CARG3, 8(BASE) + | checkfail ->fff_fallback + | mr CARG1, L + | bl extern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key) + | // Returns cTValue *. + | evldd CRET1, 0(CRET1) + | b ->fff_restv + | + |//-- Base library: conversions ------------------------------------------ + | + |.ffunc tonumber + | // Only handles the number case inline (without a base argument). + | cmplwi NARGS8:RC, 8 + | evldd CARG1, 0(BASE) + | bne ->fff_fallback // Exactly one argument. + | checknum CARG1 + | checkok ->fff_restv + | b ->fff_fallback + | + |.ffunc_1 tostring + | // Only handles the string or number case inline. + | checkstr CARG1 + | // A __tostring method in the string base metatable is ignored. + | checkok ->fff_restv // String key? + | // Handle numbers inline, unless a number base metatable is present. + | lwz TMP0, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH) + | checknum CARG1 + | cmplwi cr1, TMP0, 0 + | stw BASE, L->base // Add frame since C call can throw. + | crand 4*cr0+eq, 4*cr0+lt, 4*cr1+eq + | stw PC, SAVE_PC // Redundant (but a defined value). + | bne ->fff_fallback + | ffgccheck + | mr CARG1, L + | mr CARG2, BASE + | bl extern lj_str_fromnum // (lua_State *L, lua_Number *np) + | // Returns GCstr *. + | evmergelo STR:CRET1, TISSTR, STR:CRET1 + | b ->fff_restv + | + |//-- Base library: iterators ------------------------------------------- + | + |.ffunc next + | cmplwi NARGS8:RC, 8 + | evldd CARG2, 0(BASE) + | blt ->fff_fallback + | evstddx TISNIL, BASE, NARGS8:RC // Set missing 2nd arg to nil. + | checktab TAB:CARG2 + | lwz PC, FRAME_PC(BASE) + | checkfail ->fff_fallback + | stw BASE, L->base // Add frame since C call can throw. + | mr CARG1, L + | stw BASE, L->top // Dummy frame length is ok. + | la CARG3, 8(BASE) + | stw PC, SAVE_PC + | bl extern lj_tab_next // (lua_State *L, GCtab *t, TValue *key) + | // Returns 0 at end of traversal. + | cmplwi CRET1, 0 + | evmr CRET1, TISNIL + | beq ->fff_restv // End of traversal: return nil. + | evldd TMP0, 8(BASE) // Copy key and value to results. + | la RA, -8(BASE) + | evldd TMP1, 16(BASE) + | evstdd TMP0, 0(RA) + | li RD, (2+1)*8 + | evstdd TMP1, 8(RA) + | b ->fff_res + | + |.ffunc_1 pairs + | checktab TAB:CARG1 + | lwz PC, FRAME_PC(BASE) + | checkfail ->fff_fallback +#if LJ_52 + | lwz TAB:TMP2, TAB:CARG1->metatable + | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0] + | cmplwi TAB:TMP2, 0 + | la RA, -8(BASE) + | bne ->fff_fallback +#else + | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0] + | la RA, -8(BASE) +#endif + | evstdd TISNIL, 8(BASE) + | li RD, (3+1)*8 + | evstdd CFUNC:TMP0, 0(RA) + | b ->fff_res + | + |.ffunc_2 ipairs_aux + | checktab TAB:CARG1 + | lwz PC, FRAME_PC(BASE) + | checkfail ->fff_fallback + | checknum CARG2 + | lus TMP3, 0x3ff0 + | checkfail ->fff_fallback + | efdctsi TMP2, CARG2 + | lwz TMP0, TAB:CARG1->asize + | evmergelo TMP3, TMP3, ZERO + | lwz TMP1, TAB:CARG1->array + | efdadd CARG2, CARG2, TMP3 + | addi TMP2, TMP2, 1 + | la RA, -8(BASE) + | cmplw TMP0, TMP2 + | slwi TMP3, TMP2, 3 + | evstdd CARG2, 0(RA) + | ble >2 // Not in array part? + | evlddx TMP1, TMP1, TMP3 + |1: + | checknil TMP1 + | li RD, (0+1)*8 + | checkok ->fff_res // End of iteration, return 0 results. + | li RD, (2+1)*8 + | evstdd TMP1, 8(RA) + | b ->fff_res + |2: // Check for empty hash part first. Otherwise call C function. + | lwz TMP0, TAB:CARG1->hmask + | cmplwi TMP0, 0 + | li RD, (0+1)*8 + | beq ->fff_res + | mr CARG2, TMP2 + | bl extern lj_tab_getinth // (GCtab *t, int32_t key) + | // Returns cTValue * or NULL. + | cmplwi CRET1, 0 + | li RD, (0+1)*8 + | beq ->fff_res + | evldd TMP1, 0(CRET1) + | b <1 + | + |.ffunc_1 ipairs + | checktab TAB:CARG1 + | lwz PC, FRAME_PC(BASE) + | checkfail ->fff_fallback +#if LJ_52 + | lwz TAB:TMP2, TAB:CARG1->metatable + | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0] + | cmplwi TAB:TMP2, 0 + | la RA, -8(BASE) + | bne ->fff_fallback +#else + | evldd CFUNC:TMP0, CFUNC:RB->upvalue[0] + | la RA, -8(BASE) +#endif + | evsplati TMP1, 0 + | li RD, (3+1)*8 + | evstdd TMP1, 8(BASE) + | evstdd CFUNC:TMP0, 0(RA) + | b ->fff_res + | + |//-- Base library: catch errors ---------------------------------------- + | + |.ffunc pcall + | cmplwi NARGS8:RC, 8 + | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | blt ->fff_fallback + | mr TMP2, BASE + | la BASE, 8(BASE) + | // Remember active hook before pcall. + | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31 + | subi NARGS8:RC, NARGS8:RC, 8 + | addi PC, TMP3, 8+FRAME_PCALL + | b ->vm_call_dispatch + | + |.ffunc_2 xpcall + | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | mr TMP2, BASE + | checkfunc CARG2 // Traceback must be a function. + | checkfail ->fff_fallback + | la BASE, 16(BASE) + | // Remember active hook before pcall. + | rlwinm TMP3, TMP3, 32-HOOK_ACTIVE_SHIFT, 31, 31 + | evstdd CARG2, 0(TMP2) // Swap function and traceback. + | subi NARGS8:RC, NARGS8:RC, 16 + | evstdd CARG1, 8(TMP2) + | addi PC, TMP3, 16+FRAME_PCALL + | b ->vm_call_dispatch + | + |//-- Coroutine library -------------------------------------------------- + | + |.macro coroutine_resume_wrap, resume + |.if resume + |.ffunc_1 coroutine_resume + | evmergehi TMP0, L:CARG1, L:CARG1 + |.else + |.ffunc coroutine_wrap_aux + | lwz L:CARG1, CFUNC:RB->upvalue[0].gcr + |.endif + |.if resume + | cmpwi TMP0, LJ_TTHREAD + | bne ->fff_fallback + |.endif + | lbz TMP0, L:CARG1->status + | lwz TMP1, L:CARG1->cframe + | lwz CARG2, L:CARG1->top + | cmplwi cr0, TMP0, LUA_YIELD + | lwz TMP2, L:CARG1->base + | cmplwi cr1, TMP1, 0 + | lwz TMP0, L:CARG1->maxstack + | cmplw cr7, CARG2, TMP2 + | lwz PC, FRAME_PC(BASE) + | crorc 4*cr6+lt, 4*cr0+gt, 4*cr1+eq // st>LUA_YIELD || cframe!=0 + | add TMP2, CARG2, NARGS8:RC + | crandc 4*cr6+gt, 4*cr7+eq, 4*cr0+eq // base==top && st!=LUA_YIELD + | cmplw cr1, TMP2, TMP0 + | cror 4*cr6+lt, 4*cr6+lt, 4*cr6+gt + | stw PC, SAVE_PC + | cror 4*cr6+lt, 4*cr6+lt, 4*cr1+gt // cond1 || cond2 || stackov + | stw BASE, L->base + | blt cr6, ->fff_fallback + |1: + |.if resume + | addi BASE, BASE, 8 // Keep resumed thread in stack for GC. + | subi NARGS8:RC, NARGS8:RC, 8 + | subi TMP2, TMP2, 8 + |.endif + | stw TMP2, L:CARG1->top + | li TMP1, 0 + | stw BASE, L->top + |2: // Move args to coroutine. + | cmpw TMP1, NARGS8:RC + | evlddx TMP0, BASE, TMP1 + | beq >3 + | evstddx TMP0, CARG2, TMP1 + | addi TMP1, TMP1, 8 + | b <2 + |3: + | li CARG3, 0 + | mr L:SAVE0, L:CARG1 + | li CARG4, 0 + | bl ->vm_resume // (lua_State *L, TValue *base, 0, 0) + | // Returns thread status. + |4: + | lwz TMP2, L:SAVE0->base + | cmplwi CRET1, LUA_YIELD + | lwz TMP3, L:SAVE0->top + | li_vmstate INTERP + | lwz BASE, L->base + | st_vmstate + | bgt >8 + | sub RD, TMP3, TMP2 + | lwz TMP0, L->maxstack + | cmplwi RD, 0 + | add TMP1, BASE, RD + | beq >6 // No results? + | cmplw TMP1, TMP0 + | li TMP1, 0 + | bgt >9 // Need to grow stack? + | + | subi TMP3, RD, 8 + | stw TMP2, L:SAVE0->top // Clear coroutine stack. + |5: // Move results from coroutine. + | cmplw TMP1, TMP3 + | evlddx TMP0, TMP2, TMP1 + | evstddx TMP0, BASE, TMP1 + | addi TMP1, TMP1, 8 + | bne <5 + |6: + | andi. TMP0, PC, FRAME_TYPE + |.if resume + | li TMP1, LJ_TTRUE + | la RA, -8(BASE) + | stw TMP1, -8(BASE) // Prepend true to results. + | addi RD, RD, 16 + |.else + | mr RA, BASE + | addi RD, RD, 8 + |.endif + |7: + | stw PC, SAVE_PC + | mr MULTRES, RD + | beq ->BC_RET_Z + | b ->vm_return + | + |8: // Coroutine returned with error (at co->top-1). + |.if resume + | andi. TMP0, PC, FRAME_TYPE + | la TMP3, -8(TMP3) + | li TMP1, LJ_TFALSE + | evldd TMP0, 0(TMP3) + | stw TMP3, L:SAVE0->top // Remove error from coroutine stack. + | li RD, (2+1)*8 + | stw TMP1, -8(BASE) // Prepend false to results. + | la RA, -8(BASE) + | evstdd TMP0, 0(BASE) // Copy error message. + | b <7 + |.else + | mr CARG1, L + | mr CARG2, L:SAVE0 + | bl extern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co) + |.endif + | + |9: // Handle stack expansion on return from yield. + | mr CARG1, L + | srwi CARG2, RD, 3 + | bl extern lj_state_growstack // (lua_State *L, int n) + | li CRET1, 0 + | b <4 + |.endmacro + | + | coroutine_resume_wrap 1 // coroutine.resume + | coroutine_resume_wrap 0 // coroutine.wrap + | + |.ffunc coroutine_yield + | lwz TMP0, L->cframe + | add TMP1, BASE, NARGS8:RC + | stw BASE, L->base + | andi. TMP0, TMP0, CFRAME_RESUME + | stw TMP1, L->top + | li CRET1, LUA_YIELD + | beq ->fff_fallback + | stw ZERO, L->cframe + | stb CRET1, L->status + | b ->vm_leave_unw + | + |//-- Math library ------------------------------------------------------- + | + |.ffunc_n math_abs + | efdabs CRET1, CARG1 + | // Fallthrough. + | + |->fff_restv: + | // CRET1 = TValue result. + | lwz PC, FRAME_PC(BASE) + | la RA, -8(BASE) + | evstdd CRET1, 0(RA) + |->fff_res1: + | // RA = results, PC = return. + | li RD, (1+1)*8 + |->fff_res: + | // RA = results, RD = (nresults+1)*8, PC = return. + | andi. TMP0, PC, FRAME_TYPE + | mr MULTRES, RD + | bne ->vm_return + | lwz INS, -4(PC) + | decode_RB8 RB, INS + |5: + | cmplw RB, RD // More results expected? + | decode_RA8 TMP0, INS + | bgt >6 + | ins_next1 + | // Adjust BASE. KBASE is assumed to be set for the calling frame. + | sub BASE, RA, TMP0 + | ins_next2 + | + |6: // Fill up results with nil. + | subi TMP1, RD, 8 + | addi RD, RD, 8 + | evstddx TISNIL, RA, TMP1 + | b <5 + | + |.macro math_extern, func + | .ffunc math_ .. func + | cmplwi NARGS8:RC, 8 + | evldd CARG2, 0(BASE) + | blt ->fff_fallback + | checknum CARG2 + | evmergehi CARG1, CARG2, CARG2 + | checkfail ->fff_fallback + | bl extern func@plt + | evmergelo CRET1, CRET1, CRET2 + | b ->fff_restv + |.endmacro + | + |.macro math_extern2, func + | .ffunc math_ .. func + | cmplwi NARGS8:RC, 16 + | evldd CARG2, 0(BASE) + | evldd CARG4, 8(BASE) + | blt ->fff_fallback + | evmergehi CARG1, CARG4, CARG2 + | checknum CARG1 + | evmergehi CARG3, CARG4, CARG4 + | checkanyfail ->fff_fallback + | bl extern func@plt + | evmergelo CRET1, CRET1, CRET2 + | b ->fff_restv + |.endmacro + | + |.macro math_round, func + | .ffunc math_ .. func + | cmplwi NARGS8:RC, 8 + | evldd CARG2, 0(BASE) + | blt ->fff_fallback + | checknum CARG2 + | evmergehi CARG1, CARG2, CARG2 + | checkfail ->fff_fallback + | lwz PC, FRAME_PC(BASE) + | bl ->vm_..func.._hilo; + | la RA, -8(BASE) + | evstdd CRET2, 0(RA) + | b ->fff_res1 + |.endmacro + | + | math_round floor + | math_round ceil + | + | math_extern sqrt + | + |.ffunc math_log + | cmplwi NARGS8:RC, 8 + | evldd CARG2, 0(BASE) + | bne ->fff_fallback // Need exactly 1 argument. + | checknum CARG2 + | evmergehi CARG1, CARG2, CARG2 + | checkfail ->fff_fallback + | bl extern log@plt + | evmergelo CRET1, CRET1, CRET2 + | b ->fff_restv + | + | math_extern log10 + | math_extern exp + | math_extern sin + | math_extern cos + | math_extern tan + | math_extern asin + | math_extern acos + | math_extern atan + | math_extern sinh + | math_extern cosh + | math_extern tanh + | math_extern2 pow + | math_extern2 atan2 + | math_extern2 fmod + | + |->ff_math_deg: + |.ffunc_n math_rad + | evldd CARG2, CFUNC:RB->upvalue[0] + | efdmul CRET1, CARG1, CARG2 + | b ->fff_restv + | + |.ffunc math_ldexp + | cmplwi NARGS8:RC, 16 + | evldd CARG2, 0(BASE) + | evldd CARG4, 8(BASE) + | blt ->fff_fallback + | evmergehi CARG1, CARG4, CARG2 + | checknum CARG1 + | checkanyfail ->fff_fallback + | efdctsi CARG3, CARG4 + | bl extern ldexp@plt + | evmergelo CRET1, CRET1, CRET2 + | b ->fff_restv + | + |.ffunc math_frexp + | cmplwi NARGS8:RC, 8 + | evldd CARG2, 0(BASE) + | blt ->fff_fallback + | checknum CARG2 + | evmergehi CARG1, CARG2, CARG2 + | checkfail ->fff_fallback + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | lwz PC, FRAME_PC(BASE) + | bl extern frexp@plt + | lwz TMP1, DISPATCH_GL(tmptv)(DISPATCH) + | evmergelo CRET1, CRET1, CRET2 + | efdcfsi CRET2, TMP1 + | la RA, -8(BASE) + | evstdd CRET1, 0(RA) + | li RD, (2+1)*8 + | evstdd CRET2, 8(RA) + | b ->fff_res + | + |.ffunc math_modf + | cmplwi NARGS8:RC, 8 + | evldd CARG2, 0(BASE) + | blt ->fff_fallback + | checknum CARG2 + | evmergehi CARG1, CARG2, CARG2 + | checkfail ->fff_fallback + | la CARG3, -8(BASE) + | lwz PC, FRAME_PC(BASE) + | bl extern modf@plt + | evmergelo CRET1, CRET1, CRET2 + | la RA, -8(BASE) + | evstdd CRET1, 0(BASE) + | li RD, (2+1)*8 + | b ->fff_res + | + |.macro math_minmax, name, cmpop + | .ffunc_1 name + | checknum CARG1 + | li TMP1, 8 + | checkfail ->fff_fallback + |1: + | evlddx CARG2, BASE, TMP1 + | cmplw cr1, TMP1, NARGS8:RC + | checknum CARG2 + | bge cr1, ->fff_restv // Ok, since CRET1 = CARG1. + | checkfail ->fff_fallback + | cmpop CARG2, CARG1 + | addi TMP1, TMP1, 8 + | crmove 4*cr0+lt, 4*cr0+gt + | evsel CARG1, CARG2, CARG1 + | b <1 + |.endmacro + | + | math_minmax math_min, efdtstlt + | math_minmax math_max, efdtstgt + | + |//-- String library ----------------------------------------------------- + | + |.ffunc_1 string_len + | checkstr STR:CARG1 + | checkfail ->fff_fallback + | lwz TMP0, STR:CARG1->len + | efdcfsi CRET1, TMP0 + | b ->fff_restv + | + |.ffunc string_byte // Only handle the 1-arg case here. + | cmplwi NARGS8:RC, 8 + | evldd STR:CARG1, 0(BASE) + | bne ->fff_fallback // Need exactly 1 argument. + | checkstr STR:CARG1 + | la RA, -8(BASE) + | checkfail ->fff_fallback + | lwz TMP0, STR:CARG1->len + | li RD, (0+1)*8 + | lbz TMP1, STR:CARG1[1] // Access is always ok (NUL at end). + | li TMP2, (1+1)*8 + | cmplwi TMP0, 0 + | lwz PC, FRAME_PC(BASE) + | efdcfsi CRET1, TMP1 + | iseleq RD, RD, TMP2 + | evstdd CRET1, 0(RA) + | b ->fff_res + | + |.ffunc string_char // Only handle the 1-arg case here. + | ffgccheck + | cmplwi NARGS8:RC, 8 + | evldd CARG1, 0(BASE) + | bne ->fff_fallback // Exactly 1 argument. + | checknum CARG1 + | la CARG2, DISPATCH_GL(tmptv)(DISPATCH) + | checkfail ->fff_fallback + | efdctsiz TMP0, CARG1 + | li CARG3, 1 + | cmplwi TMP0, 255 + | stb TMP0, 0(CARG2) + | bgt ->fff_fallback + |->fff_newstr: + | mr CARG1, L + | stw BASE, L->base + | stw PC, SAVE_PC + | bl extern lj_str_new // (lua_State *L, char *str, size_t l) + | // Returns GCstr *. + | lwz BASE, L->base + | evmergelo STR:CRET1, TISSTR, STR:CRET1 + | b ->fff_restv + | + |.ffunc string_sub + | ffgccheck + | cmplwi NARGS8:RC, 16 + | evldd CARG3, 16(BASE) + | evldd STR:CARG1, 0(BASE) + | blt ->fff_fallback + | evldd CARG2, 8(BASE) + | li TMP2, -1 + | beq >1 + | checknum CARG3 + | checkfail ->fff_fallback + | efdctsiz TMP2, CARG3 + |1: + | checknum CARG2 + | checkfail ->fff_fallback + | checkstr STR:CARG1 + | efdctsiz TMP1, CARG2 + | checkfail ->fff_fallback + | lwz TMP0, STR:CARG1->len + | cmplw TMP0, TMP2 // len < end? (unsigned compare) + | add TMP3, TMP2, TMP0 + | blt >5 + |2: + | cmpwi TMP1, 0 // start <= 0? + | add TMP3, TMP1, TMP0 + | ble >7 + |3: + | sub. CARG3, TMP2, TMP1 + | addi CARG2, STR:CARG1, #STR-1 + | addi CARG3, CARG3, 1 + | add CARG2, CARG2, TMP1 + | isellt CARG3, r0, CARG3 + | b ->fff_newstr + | + |5: // Negative end or overflow. + | cmpw TMP0, TMP2 + | addi TMP3, TMP3, 1 + | iselgt TMP2, TMP3, TMP0 // end = end > len ? len : end+len+1 + | b <2 + | + |7: // Negative start or underflow. + | cmpwi cr1, TMP3, 0 + | iseleq TMP1, r0, TMP3 + | isel TMP1, r0, TMP1, 4*cr1+lt + | addi TMP1, TMP1, 1 // start = 1 + (start ? start+len : 0) + | b <3 + | + |.ffunc string_rep // Only handle the 1-char case inline. + | ffgccheck + | cmplwi NARGS8:RC, 16 + | evldd CARG1, 0(BASE) + | evldd CARG2, 8(BASE) + | bne ->fff_fallback // Exactly 2 arguments. + | checknum CARG2 + | checkfail ->fff_fallback + | checkstr STR:CARG1 + | efdctsiz CARG3, CARG2 + | checkfail ->fff_fallback + | lwz TMP0, STR:CARG1->len + | cmpwi CARG3, 0 + | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH) + | ble >2 // Count <= 0? (or non-int) + | cmplwi TMP0, 1 + | subi TMP2, CARG3, 1 + | blt >2 // Zero length string? + | cmplw cr1, TMP1, CARG3 + | bne ->fff_fallback // Fallback for > 1-char strings. + | lbz TMP0, STR:CARG1[1] + | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH) + | blt cr1, ->fff_fallback + |1: // Fill buffer with char. Yes, this is suboptimal code (do you care?). + | cmplwi TMP2, 0 + | stbx TMP0, CARG2, TMP2 + | subi TMP2, TMP2, 1 + | bne <1 + | b ->fff_newstr + |2: // Return empty string. + | la STR:CRET1, DISPATCH_GL(strempty)(DISPATCH) + | evmergelo CRET1, TISSTR, STR:CRET1 + | b ->fff_restv + | + |.ffunc string_reverse + | ffgccheck + | cmplwi NARGS8:RC, 8 + | evldd CARG1, 0(BASE) + | blt ->fff_fallback + | checkstr STR:CARG1 + | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH) + | checkfail ->fff_fallback + | lwz CARG3, STR:CARG1->len + | la CARG1, #STR(STR:CARG1) + | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH) + | li TMP2, 0 + | cmplw TMP1, CARG3 + | subi TMP3, CARG3, 1 + | blt ->fff_fallback + |1: // Reverse string copy. + | cmpwi TMP3, 0 + | lbzx TMP1, CARG1, TMP2 + | blt ->fff_newstr + | stbx TMP1, CARG2, TMP3 + | subi TMP3, TMP3, 1 + | addi TMP2, TMP2, 1 + | b <1 + | + |.macro ffstring_case, name, lo + | .ffunc name + | ffgccheck + | cmplwi NARGS8:RC, 8 + | evldd CARG1, 0(BASE) + | blt ->fff_fallback + | checkstr STR:CARG1 + | lwz TMP1, DISPATCH_GL(tmpbuf.sz)(DISPATCH) + | checkfail ->fff_fallback + | lwz CARG3, STR:CARG1->len + | la CARG1, #STR(STR:CARG1) + | lwz CARG2, DISPATCH_GL(tmpbuf.buf)(DISPATCH) + | cmplw TMP1, CARG3 + | li TMP2, 0 + | blt ->fff_fallback + |1: // ASCII case conversion. + | cmplw TMP2, CARG3 + | lbzx TMP1, CARG1, TMP2 + | bge ->fff_newstr + | subi TMP0, TMP1, lo + | xori TMP3, TMP1, 0x20 + | cmplwi TMP0, 26 + | isellt TMP1, TMP3, TMP1 + | stbx TMP1, CARG2, TMP2 + | addi TMP2, TMP2, 1 + | b <1 + |.endmacro + | + |ffstring_case string_lower, 65 + |ffstring_case string_upper, 97 + | + |//-- Table library ------------------------------------------------------ + | + |.ffunc_1 table_getn + | checktab CARG1 + | checkfail ->fff_fallback + | bl extern lj_tab_len // (GCtab *t) + | // Returns uint32_t (but less than 2^31). + | efdcfsi CRET1, CRET1 + | b ->fff_restv + | + |//-- Bit library -------------------------------------------------------- + | + |.macro .ffunc_bit, name + | .ffunc_n bit_..name + | efdadd CARG1, CARG1, TOBIT + |.endmacro + | + |.ffunc_bit tobit + |->fff_resbit: + | efdcfsi CRET1, CARG1 + | b ->fff_restv + | + |.macro .ffunc_bit_op, name, ins + | .ffunc_bit name + | li TMP1, 8 + |1: + | evlddx CARG2, BASE, TMP1 + | cmplw cr1, TMP1, NARGS8:RC + | checknum CARG2 + | bge cr1, ->fff_resbit + | checkfail ->fff_fallback + | efdadd CARG2, CARG2, TOBIT + | ins CARG1, CARG1, CARG2 + | addi TMP1, TMP1, 8 + | b <1 + |.endmacro + | + |.ffunc_bit_op band, and + |.ffunc_bit_op bor, or + |.ffunc_bit_op bxor, xor + | + |.ffunc_bit bswap + | rotlwi TMP0, CARG1, 8 + | rlwimi TMP0, CARG1, 24, 0, 7 + | rlwimi TMP0, CARG1, 24, 16, 23 + | efdcfsi CRET1, TMP0 + | b ->fff_restv + | + |.ffunc_bit bnot + | not TMP0, CARG1 + | efdcfsi CRET1, TMP0 + | b ->fff_restv + | + |.macro .ffunc_bit_sh, name, ins, shmod + | .ffunc_nn bit_..name + | efdadd CARG2, CARG2, TOBIT + | efdadd CARG1, CARG1, TOBIT + |.if shmod == 1 + | rlwinm CARG2, CARG2, 0, 27, 31 + |.elif shmod == 2 + | neg CARG2, CARG2 + |.endif + | ins TMP0, CARG1, CARG2 + | efdcfsi CRET1, TMP0 + | b ->fff_restv + |.endmacro + | + |.ffunc_bit_sh lshift, slw, 1 + |.ffunc_bit_sh rshift, srw, 1 + |.ffunc_bit_sh arshift, sraw, 1 + |.ffunc_bit_sh rol, rotlw, 0 + |.ffunc_bit_sh ror, rotlw, 2 + | + |//----------------------------------------------------------------------- + | + |->fff_fallback: // Call fast function fallback handler. + | // BASE = new base, RB = CFUNC, RC = nargs*8 + | lwz TMP3, CFUNC:RB->f + | add TMP1, BASE, NARGS8:RC + | lwz PC, FRAME_PC(BASE) // Fallback may overwrite PC. + | addi TMP0, TMP1, 8*LUA_MINSTACK + | lwz TMP2, L->maxstack + | stw PC, SAVE_PC // Redundant (but a defined value). + | cmplw TMP0, TMP2 + | stw BASE, L->base + | stw TMP1, L->top + | mr CARG1, L + | bgt >5 // Need to grow stack. + | mtctr TMP3 + | bctrl // (lua_State *L) + | // Either throws an error, or recovers and returns -1, 0 or nresults+1. + | lwz BASE, L->base + | cmpwi CRET1, 0 + | slwi RD, CRET1, 3 + | la RA, -8(BASE) + | bgt ->fff_res // Returned nresults+1? + |1: // Returned 0 or -1: retry fast path. + | lwz TMP0, L->top + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | sub NARGS8:RC, TMP0, BASE + | bne ->vm_call_tail // Returned -1? + | ins_callt // Returned 0: retry fast path. + | + |// Reconstruct previous base for vmeta_call during tailcall. + |->vm_call_tail: + | andi. TMP0, PC, FRAME_TYPE + | rlwinm TMP1, PC, 0, 0, 28 + | bne >3 + | lwz INS, -4(PC) + | decode_RA8 TMP1, INS + | addi TMP1, TMP1, 8 + |3: + | sub TMP2, BASE, TMP1 + | b ->vm_call_dispatch // Resolve again for tailcall. + | + |5: // Grow stack for fallback handler. + | li CARG2, LUA_MINSTACK + | bl extern lj_state_growstack // (lua_State *L, int n) + | lwz BASE, L->base + | cmpw TMP0, TMP0 // Set 4*cr0+eq to force retry. + | b <1 + | + |->fff_gcstep: // Call GC step function. + | // BASE = new base, RC = nargs*8 + | mflr SAVE0 + | stw BASE, L->base + | add TMP0, BASE, NARGS8:RC + | stw PC, SAVE_PC // Redundant (but a defined value). + | stw TMP0, L->top + | mr CARG1, L + | bl extern lj_gc_step // (lua_State *L) + | lwz BASE, L->base + | mtlr SAVE0 + | lwz TMP0, L->top + | sub NARGS8:RC, TMP0, BASE + | lwz CFUNC:RB, FRAME_FUNC(BASE) + | blr + | + |//----------------------------------------------------------------------- + |//-- Special dispatch targets ------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_record: // Dispatch target for recording phase. + |.if JIT + | NYI + |.endif + | + |->vm_rethook: // Dispatch target for return hooks. + | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active? + | beq >1 + |5: // Re-dispatch to static ins. + | addi TMP1, TMP1, GG_DISP2STATIC // Assumes decode_OP4 TMP1, INS. + | lwzx TMP0, DISPATCH, TMP1 + | mtctr TMP0 + | bctr + | + |->vm_inshook: // Dispatch target for instr/line hooks. + | lbz TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | lwz TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | andi. TMP0, TMP3, HOOK_ACTIVE // Hook already active? + | rlwinm TMP0, TMP3, 31-LUA_HOOKLINE, 31, 0 + | bne <5 + | + | cmpwi cr1, TMP0, 0 + | addic. TMP2, TMP2, -1 + | beq cr1, <5 + | stw TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | beq >1 + | bge cr1, <5 + |1: + | mr CARG1, L + | stw MULTRES, SAVE_MULTRES + | mr CARG2, PC + | stw BASE, L->base + | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC. + | bl extern lj_dispatch_ins // (lua_State *L, const BCIns *pc) + |3: + | lwz BASE, L->base + |4: // Re-dispatch to static ins. + | lwz INS, -4(PC) + | decode_OP4 TMP1, INS + | decode_RB8 RB, INS + | addi TMP1, TMP1, GG_DISP2STATIC + | decode_RD8 RD, INS + | lwzx TMP0, DISPATCH, TMP1 + | decode_RA8 RA, INS + | decode_RC8 RC, INS + | mtctr TMP0 + | bctr + | + |->cont_hook: // Continue from hook yield. + | addi PC, PC, 4 + | lwz MULTRES, -20(RB) // Restore MULTRES for *M ins. + | b <4 + | + |->vm_hotloop: // Hot loop counter underflow. + |.if JIT + | NYI + |.endif + | + |->vm_callhook: // Dispatch target for call hooks. + | mr CARG2, PC + |.if JIT + | b >1 + |.endif + | + |->vm_hotcall: // Hot call counter underflow. + |.if JIT + | ori CARG2, PC, 1 + |1: + |.endif + | add TMP0, BASE, RC + | stw PC, SAVE_PC + | mr CARG1, L + | stw BASE, L->base + | sub RA, RA, BASE + | stw TMP0, L->top + | bl extern lj_dispatch_call // (lua_State *L, const BCIns *pc) + | // Returns ASMFunction. + | lwz BASE, L->base + | lwz TMP0, L->top + | stw ZERO, SAVE_PC // Invalidate for subsequent line hook. + | sub NARGS8:RC, TMP0, BASE + | add RA, BASE, RA + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | mtctr CRET1 + | bctr + | + |//----------------------------------------------------------------------- + |//-- Trace exit handler ------------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_exit_handler: + |.if JIT + | NYI + |.endif + |->vm_exit_interp: + |.if JIT + | NYI + |.endif + | + |//----------------------------------------------------------------------- + |//-- Math helper functions ---------------------------------------------- + |//----------------------------------------------------------------------- + | + |// FP value rounding. Called by math.floor/math.ceil fast functions + |// and from JIT code. + |// + |// This can be inlined if the CPU has the frin/friz/frip/frim instructions. + |// The alternative hard-float approaches have a deep dependency chain. + |// The resulting latency is at least 3x-7x the double-precision FP latency + |// (e500v2: 6cy, e600: 5cy, Cell: 10cy) or around 20-70 cycles. + |// + |// The soft-float approach is tedious, but much faster (e500v2: ~11cy/~6cy). + |// However it relies on a fast way to transfer the FP value to GPRs + |// (e500v2: 0cy for lo-word, 1cy for hi-word). + |// + |.macro vm_round, name, mode + | // Used temporaries: TMP0, TMP1, TMP2, TMP3. + |->name.._efd: // Input: CARG2, output: CRET2 + | evmergehi CARG1, CARG2, CARG2 + |->name.._hilo: + | // Input: CARG1 (hi), CARG2 (hi, lo), output: CRET2 + | rlwinm TMP2, CARG1, 12, 21, 31 + | addic. TMP2, TMP2, -1023 // exp = exponent(x) - 1023 + | li TMP1, -1 + | cmplwi cr1, TMP2, 51 // 0 <= exp <= 51? + | subfic TMP0, TMP2, 52 + | bgt cr1, >1 + | lus TMP3, 0xfff0 + | slw TMP0, TMP1, TMP0 // lomask = -1 << (52-exp) + | sraw TMP1, TMP3, TMP2 // himask = (int32_t)0xfff00000 >> exp + |.if mode == 2 // trunc(x): + | evmergelo TMP0, TMP1, TMP0 + | evand CRET2, CARG2, TMP0 // hi &= himask, lo &= lomask + |.else + | andc TMP2, CARG2, TMP0 + | andc TMP3, CARG1, TMP1 + | or TMP2, TMP2, TMP3 // ztest = (hi&~himask) | (lo&~lomask) + | srawi TMP3, CARG1, 31 // signmask = (int32_t)hi >> 31 + |.if mode == 0 // floor(x): + | and. TMP2, TMP2, TMP3 // iszero = ((ztest & signmask) == 0) + |.else // ceil(x): + | andc. TMP2, TMP2, TMP3 // iszero = ((ztest & ~signmask) == 0) + |.endif + | and CARG2, CARG2, TMP0 // lo &= lomask + | and CARG1, CARG1, TMP1 // hi &= himask + | subc TMP0, CARG2, TMP0 + | iseleq TMP0, CARG2, TMP0 // lo = iszero ? lo : lo-lomask + | sube TMP1, CARG1, TMP1 + | iseleq TMP1, CARG1, TMP1 // hi = iszero ? hi : hi-himask+carry + | evmergelo CRET2, TMP1, TMP0 + |.endif + | blr + |1: + | bgtlr // Already done if >=2^52, +-inf or nan. + |.if mode == 2 // trunc(x): + | rlwinm TMP1, CARG1, 0, 0, 0 // hi = sign(x) + | li TMP0, 0 + | evmergelo CRET2, TMP1, TMP0 + |.else + | rlwinm TMP2, CARG1, 0, 1, 31 + | srawi TMP0, CARG1, 31 // signmask = (int32_t)hi >> 31 + | or TMP2, TMP2, CARG2 // ztest = abs(hi) | lo + | lus TMP1, 0x3ff0 + |.if mode == 0 // floor(x): + | and. TMP2, TMP2, TMP0 // iszero = ((ztest & signmask) == 0) + |.else // ceil(x): + | andc. TMP2, TMP2, TMP0 // iszero = ((ztest & ~signmask) == 0) + |.endif + | li TMP0, 0 + | iseleq TMP1, r0, TMP1 + | rlwimi CARG1, TMP1, 0, 1, 31 // hi = sign(x) | (iszero ? 0.0 : 1.0) + | evmergelo CRET2, CARG1, TMP0 + |.endif + | blr + |.endmacro + | + |->vm_floor: + | mflr CARG3 + | evmergelo CARG2, CARG1, CARG2 + | bl ->vm_floor_hilo + | mtlr CARG3 + | evmergehi CRET1, CRET2, CRET2 + | blr + | + | vm_round vm_floor, 0 + | vm_round vm_ceil, 1 + |.if JIT + | vm_round vm_trunc, 2 + |.else + |->vm_trunc_efd: + |->vm_trunc_hilo: + |.endif + | + |//----------------------------------------------------------------------- + |//-- Miscellaneous functions -------------------------------------------- + |//----------------------------------------------------------------------- + | + |//----------------------------------------------------------------------- + |//-- FFI helper functions ----------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_ffi_call: + |.if FFI + | NYI + |.endif + | + |//----------------------------------------------------------------------- +} + +/* Generate the code for a single instruction. */ +static void build_ins(BuildCtx *ctx, BCOp op, int defop) +{ + int vk = 0; + |=>defop: + + switch (op) { + + /* -- Comparison ops ---------------------------------------------------- */ + + /* Remember: all ops branch for a true comparison, fall through otherwise. */ + + case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT: + | // RA = src1*8, RD = src2*8, JMP with RD = target + | evlddx TMP0, BASE, RA + | addi PC, PC, 4 + | evlddx TMP1, BASE, RD + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | lwz TMP2, -4(PC) + | evmergehi RB, TMP0, TMP1 + | decode_RD4 TMP2, TMP2 + | checknum RB + | add TMP2, TMP2, TMP3 + | checkanyfail ->vmeta_comp + | efdcmplt TMP0, TMP1 + if (op == BC_ISLE || op == BC_ISGT) { + | efdcmpeq cr1, TMP0, TMP1 + | cror 4*cr0+gt, 4*cr0+gt, 4*cr1+gt + } + if (op == BC_ISLT || op == BC_ISLE) { + | iselgt PC, TMP2, PC + } else { + | iselgt PC, PC, TMP2 + } + | ins_next + break; + + case BC_ISEQV: case BC_ISNEV: + vk = op == BC_ISEQV; + | // RA = src1*8, RD = src2*8, JMP with RD = target + | evlddx CARG2, BASE, RA + | addi PC, PC, 4 + | evlddx CARG3, BASE, RD + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | lwz TMP2, -4(PC) + | evmergehi RB, CARG2, CARG3 + | decode_RD4 TMP2, TMP2 + | checknum RB + | add TMP2, TMP2, TMP3 + | checkanyfail >5 + | efdcmpeq CARG2, CARG3 + if (vk) { + | iselgt PC, TMP2, PC + } else { + | iselgt PC, PC, TMP2 + } + |1: + | ins_next + | + |5: // Either or both types are not numbers. + | evcmpeq CARG2, CARG3 + | not TMP3, RB + | cmplwi cr1, TMP3, ~LJ_TISPRI // Primitive? + | crorc 4*cr7+lt, 4*cr0+so, 4*cr0+lt // 1: Same tv or different type. + | cmplwi cr6, TMP3, ~LJ_TISTABUD // Table or userdata? + | crandc 4*cr7+gt, 4*cr0+lt, 4*cr1+gt // 2: Same type and primitive. + | mr SAVE0, PC + if (vk) { + | isel PC, TMP2, PC, 4*cr7+gt + } else { + | isel TMP2, PC, TMP2, 4*cr7+gt + } + | cror 4*cr7+lt, 4*cr7+lt, 4*cr7+gt // 1 or 2. + if (vk) { + | isel PC, TMP2, PC, 4*cr0+so + } else { + | isel PC, PC, TMP2, 4*cr0+so + } + | blt cr7, <1 // Done if 1 or 2. + | blt cr6, <1 // Done if not tab/ud. + | + | // Different tables or userdatas. Need to check __eq metamethod. + | // Field metatable must be at same offset for GCtab and GCudata! + | lwz TAB:TMP2, TAB:CARG2->metatable + | li CARG4, 1-vk // ne = 0 or 1. + | cmplwi TAB:TMP2, 0 + | beq <1 // No metatable? + | lbz TMP2, TAB:TMP2->nomm + | andi. TMP2, TMP2, 1<<MM_eq + | bne <1 // Or 'no __eq' flag set? + | mr PC, SAVE0 // Restore old PC. + | b ->vmeta_equal // Handle __eq metamethod. + break; + + case BC_ISEQS: case BC_ISNES: + vk = op == BC_ISEQS; + | // RA = src*8, RD = str_const*8 (~), JMP with RD = target + | evlddx TMP0, BASE, RA + | srwi RD, RD, 1 + | lwz INS, 0(PC) + | subfic RD, RD, -4 + | addi PC, PC, 4 + | lwzx STR:TMP1, KBASE, RD // KBASE-4-str_const*4 + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | decode_RD4 TMP2, INS + | evmergelo STR:TMP1, TISSTR, STR:TMP1 + | add TMP2, TMP2, TMP3 + | evcmpeq TMP0, STR:TMP1 + if (vk) { + | isel PC, TMP2, PC, 4*cr0+so + } else { + | isel PC, PC, TMP2, 4*cr0+so + } + | ins_next + break; + + case BC_ISEQN: case BC_ISNEN: + vk = op == BC_ISEQN; + | // RA = src*8, RD = num_const*8, JMP with RD = target + | evlddx TMP0, BASE, RA + | addi PC, PC, 4 + | evlddx TMP1, KBASE, RD + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | lwz INS, -4(PC) + | checknum TMP0 + | checkfail >5 + | efdcmpeq TMP0, TMP1 + |1: + | decode_RD4 TMP2, INS + | add TMP2, TMP2, TMP3 + if (vk) { + | iselgt PC, TMP2, PC + |5: + } else { + | iselgt PC, PC, TMP2 + } + |3: + | ins_next + if (!vk) { + |5: + | decode_RD4 TMP2, INS + | add PC, TMP2, TMP3 + | b <3 + } + break; + + case BC_ISEQP: case BC_ISNEP: + vk = op == BC_ISEQP; + | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target + | lwzx TMP0, BASE, RA + | srwi TMP1, RD, 3 + | lwz INS, 0(PC) + | addi PC, PC, 4 + | not TMP1, TMP1 + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | cmplw TMP0, TMP1 + | decode_RD4 TMP2, INS + | add TMP2, TMP2, TMP3 + if (vk) { + | iseleq PC, TMP2, PC + } else { + | iseleq PC, PC, TMP2 + } + | ins_next + break; + + /* -- Unary test and copy ops ------------------------------------------- */ + + case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF: + | // RA = dst*8 or unused, RD = src*8, JMP with RD = target + | evlddx TMP0, BASE, RD + | evaddw TMP1, TISNIL, TISNIL // Synthesize LJ_TFALSE. + | lwz INS, 0(PC) + | evcmpltu TMP0, TMP1 + | addi PC, PC, 4 + if (op == BC_IST || op == BC_ISF) { + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | decode_RD4 TMP2, INS + | add TMP2, TMP2, TMP3 + if (op == BC_IST) { + | isellt PC, TMP2, PC + } else { + | isellt PC, PC, TMP2 + } + } else { + if (op == BC_ISTC) { + | checkfail >1 + } else { + | checkok >1 + } + | addis PC, PC, -(BCBIAS_J*4 >> 16) + | decode_RD4 TMP2, INS + | evstddx TMP0, BASE, RA + | add PC, PC, TMP2 + |1: + } + | ins_next + break; + + /* -- Unary ops --------------------------------------------------------- */ + + case BC_MOV: + | // RA = dst*8, RD = src*8 + | ins_next1 + | evlddx TMP0, BASE, RD + | evstddx TMP0, BASE, RA + | ins_next2 + break; + case BC_NOT: + | // RA = dst*8, RD = src*8 + | ins_next1 + | lwzx TMP0, BASE, RD + | subfic TMP1, TMP0, LJ_TTRUE + | adde TMP0, TMP0, TMP1 + | stwx TMP0, BASE, RA + | ins_next2 + break; + case BC_UNM: + | // RA = dst*8, RD = src*8 + | evlddx TMP0, BASE, RD + | checknum TMP0 + | checkfail ->vmeta_unm + | efdneg TMP0, TMP0 + | ins_next1 + | evstddx TMP0, BASE, RA + | ins_next2 + break; + case BC_LEN: + | // RA = dst*8, RD = src*8 + | evlddx CARG1, BASE, RD + | checkstr CARG1 + | checkfail >2 + | lwz CRET1, STR:CARG1->len + |1: + | ins_next1 + | efdcfsi TMP0, CRET1 + | evstddx TMP0, BASE, RA + | ins_next2 + |2: + | checktab CARG1 + | checkfail ->vmeta_len +#if LJ_52 + | lwz TAB:TMP2, TAB:CARG1->metatable + | cmplwi TAB:TMP2, 0 + | bne >9 + |3: +#endif + |->BC_LEN_Z: + | bl extern lj_tab_len // (GCtab *t) + | // Returns uint32_t (but less than 2^31). + | b <1 +#if LJ_52 + |9: + | lbz TMP0, TAB:TMP2->nomm + | andi. TMP0, TMP0, 1<<MM_len + | bne <3 // 'no __len' flag set: done. + | b ->vmeta_len +#endif + break; + + /* -- Binary ops -------------------------------------------------------- */ + + |.macro ins_arithpre, t0, t1 + | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8 + ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); + ||switch (vk) { + ||case 0: + | evlddx t0, BASE, RB + | checknum t0 + | evlddx t1, KBASE, RC + | checkfail ->vmeta_arith_vn + || break; + ||case 1: + | evlddx t1, BASE, RB + | checknum t1 + | evlddx t0, KBASE, RC + | checkfail ->vmeta_arith_nv + || break; + ||default: + | evlddx t0, BASE, RB + | evlddx t1, BASE, RC + | evmergehi TMP2, t0, t1 + | checknum TMP2 + | checkanyfail ->vmeta_arith_vv + || break; + ||} + |.endmacro + | + |.macro ins_arith, ins + | ins_arithpre TMP0, TMP1 + | ins_next1 + | ins TMP0, TMP0, TMP1 + | evstddx TMP0, BASE, RA + | ins_next2 + |.endmacro + + case BC_ADDVN: case BC_ADDNV: case BC_ADDVV: + | ins_arith efdadd + break; + case BC_SUBVN: case BC_SUBNV: case BC_SUBVV: + | ins_arith efdsub + break; + case BC_MULVN: case BC_MULNV: case BC_MULVV: + | ins_arith efdmul + break; + case BC_DIVVN: case BC_DIVNV: case BC_DIVVV: + | ins_arith efddiv + break; + case BC_MODVN: + | ins_arithpre RD, SAVE0 + |->BC_MODVN_Z: + | efddiv CARG2, RD, SAVE0 + | bl ->vm_floor_efd // floor(b/c) + | efdmul TMP0, CRET2, SAVE0 + | ins_next1 + | efdsub TMP0, RD, TMP0 // b - floor(b/c)*c + | evstddx TMP0, BASE, RA + | ins_next2 + break; + case BC_MODNV: case BC_MODVV: + | ins_arithpre RD, SAVE0 + | b ->BC_MODVN_Z // Avoid 3 copies. It's slow anyway. + break; + case BC_POW: + | evlddx CARG2, BASE, RB + | evlddx CARG4, BASE, RC + | evmergehi CARG1, CARG4, CARG2 + | checknum CARG1 + | evmergehi CARG3, CARG4, CARG4 + | checkanyfail ->vmeta_arith_vv + | bl extern pow@plt + | evmergelo CRET2, CRET1, CRET2 + | evstddx CRET2, BASE, RA + | ins_next + break; + + case BC_CAT: + | // RA = dst*8, RB = src_start*8, RC = src_end*8 + | sub CARG3, RC, RB + | stw BASE, L->base + | add CARG2, BASE, RC + | mr SAVE0, RB + |->BC_CAT_Z: + | stw PC, SAVE_PC + | mr CARG1, L + | srwi CARG3, CARG3, 3 + | bl extern lj_meta_cat // (lua_State *L, TValue *top, int left) + | // Returns NULL (finished) or TValue * (metamethod). + | cmplwi CRET1, 0 + | lwz BASE, L->base + | bne ->vmeta_binop + | evlddx TMP0, BASE, SAVE0 // Copy result from RB to RA. + | evstddx TMP0, BASE, RA + | ins_next + break; + + /* -- Constant ops ------------------------------------------------------ */ + + case BC_KSTR: + | // RA = dst*8, RD = str_const*8 (~) + | ins_next1 + | srwi TMP1, RD, 1 + | subfic TMP1, TMP1, -4 + | lwzx TMP0, KBASE, TMP1 // KBASE-4-str_const*4 + | evmergelo TMP0, TISSTR, TMP0 + | evstddx TMP0, BASE, RA + | ins_next2 + break; + case BC_KCDATA: + |.if FFI + | // RA = dst*8, RD = cdata_const*8 (~) + | ins_next1 + | srwi TMP1, RD, 1 + | subfic TMP1, TMP1, -4 + | lwzx TMP0, KBASE, TMP1 // KBASE-4-cdata_const*4 + | li TMP2, LJ_TCDATA + | evmergelo TMP0, TMP2, TMP0 + | evstddx TMP0, BASE, RA + | ins_next2 + |.endif + break; + case BC_KSHORT: + | // RA = dst*8, RD = int16_literal*8 + | srwi TMP1, RD, 3 + | extsh TMP1, TMP1 + | ins_next1 + | efdcfsi TMP0, TMP1 + | evstddx TMP0, BASE, RA + | ins_next2 + break; + case BC_KNUM: + | // RA = dst*8, RD = num_const*8 + | evlddx TMP0, KBASE, RD + | ins_next1 + | evstddx TMP0, BASE, RA + | ins_next2 + break; + case BC_KPRI: + | // RA = dst*8, RD = primitive_type*8 (~) + | srwi TMP1, RD, 3 + | not TMP0, TMP1 + | ins_next1 + | stwx TMP0, BASE, RA + | ins_next2 + break; + case BC_KNIL: + | // RA = base*8, RD = end*8 + | evstddx TISNIL, BASE, RA + | addi RA, RA, 8 + |1: + | evstddx TISNIL, BASE, RA + | cmpw RA, RD + | addi RA, RA, 8 + | blt <1 + | ins_next_ + break; + + /* -- Upvalue and function ops ------------------------------------------ */ + + case BC_UGET: + | // RA = dst*8, RD = uvnum*8 + | ins_next1 + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi RD, RD, 1 + | addi RD, RD, offsetof(GCfuncL, uvptr) + | lwzx UPVAL:RB, LFUNC:RB, RD + | lwz TMP1, UPVAL:RB->v + | evldd TMP0, 0(TMP1) + | evstddx TMP0, BASE, RA + | ins_next2 + break; + case BC_USETV: + | // RA = uvnum*8, RD = src*8 + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi RA, RA, 1 + | addi RA, RA, offsetof(GCfuncL, uvptr) + | evlddx TMP1, BASE, RD + | lwzx UPVAL:RB, LFUNC:RB, RA + | lbz TMP3, UPVAL:RB->marked + | lwz CARG2, UPVAL:RB->v + | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv) + | lbz TMP0, UPVAL:RB->closed + | evmergehi TMP2, TMP1, TMP1 + | evstdd TMP1, 0(CARG2) + | cmplwi cr1, TMP0, 0 + | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq + | subi TMP2, TMP2, (LJ_TISNUM+1) + | bne >2 // Upvalue is closed and black? + |1: + | ins_next + | + |2: // Check if new value is collectable. + | cmplwi TMP2, LJ_TISGCV - (LJ_TISNUM+1) + | bge <1 // tvisgcv(v) + | lbz TMP3, GCOBJ:TMP1->gch.marked + | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(v) + | la CARG1, GG_DISP2G(DISPATCH) + | // Crossed a write barrier. Move the barrier forward. + | beq <1 + | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv) + | b <1 + break; + case BC_USETS: + | // RA = uvnum*8, RD = str_const*8 (~) + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi TMP1, RD, 1 + | srwi RA, RA, 1 + | subfic TMP1, TMP1, -4 + | addi RA, RA, offsetof(GCfuncL, uvptr) + | lwzx STR:TMP1, KBASE, TMP1 // KBASE-4-str_const*4 + | lwzx UPVAL:RB, LFUNC:RB, RA + | evmergelo STR:TMP1, TISSTR, STR:TMP1 + | lbz TMP3, UPVAL:RB->marked + | lwz CARG2, UPVAL:RB->v + | andi. TMP3, TMP3, LJ_GC_BLACK // isblack(uv) + | lbz TMP3, STR:TMP1->marked + | lbz TMP2, UPVAL:RB->closed + | evstdd STR:TMP1, 0(CARG2) + | bne >2 + |1: + | ins_next + | + |2: // Check if string is white and ensure upvalue is closed. + | andi. TMP3, TMP3, LJ_GC_WHITES // iswhite(str) + | cmplwi cr1, TMP2, 0 + | cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq + | la CARG1, GG_DISP2G(DISPATCH) + | // Crossed a write barrier. Move the barrier forward. + | beq <1 + | bl extern lj_gc_barrieruv // (global_State *g, TValue *tv) + | b <1 + break; + case BC_USETN: + | // RA = uvnum*8, RD = num_const*8 + | ins_next1 + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi RA, RA, 1 + | addi RA, RA, offsetof(GCfuncL, uvptr) + | evlddx TMP0, KBASE, RD + | lwzx UPVAL:RB, LFUNC:RB, RA + | lwz TMP1, UPVAL:RB->v + | evstdd TMP0, 0(TMP1) + | ins_next2 + break; + case BC_USETP: + | // RA = uvnum*8, RD = primitive_type*8 (~) + | ins_next1 + | lwz LFUNC:RB, FRAME_FUNC(BASE) + | srwi RA, RA, 1 + | addi RA, RA, offsetof(GCfuncL, uvptr) + | srwi TMP0, RD, 3 + | lwzx UPVAL:RB, LFUNC:RB, RA + | not TMP0, TMP0 + | lwz TMP1, UPVAL:RB->v + | stw TMP0, 0(TMP1) + | ins_next2 + break; + + case BC_UCLO: + | // RA = level*8, RD = target + | lwz TMP1, L->openupval + | branch_RD // Do this first since RD is not saved. + | stw BASE, L->base + | cmplwi TMP1, 0 + | mr CARG1, L + | beq >1 + | add CARG2, BASE, RA + | bl extern lj_func_closeuv // (lua_State *L, TValue *level) + | lwz BASE, L->base + |1: + | ins_next + break; + + case BC_FNEW: + | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype) + | srwi TMP1, RD, 1 + | stw BASE, L->base + | subfic TMP1, TMP1, -4 + | stw PC, SAVE_PC + | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4 + | mr CARG1, L + | lwz CARG3, FRAME_FUNC(BASE) + | // (lua_State *L, GCproto *pt, GCfuncL *parent) + | bl extern lj_func_newL_gc + | // Returns GCfuncL *. + | lwz BASE, L->base + | evmergelo LFUNC:CRET1, TISFUNC, LFUNC:CRET1 + | evstddx LFUNC:CRET1, BASE, RA + | ins_next + break; + + /* -- Table ops --------------------------------------------------------- */ + + case BC_TNEW: + case BC_TDUP: + | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~) + | lwz TMP0, DISPATCH_GL(gc.total)(DISPATCH) + | mr CARG1, L + | lwz TMP1, DISPATCH_GL(gc.threshold)(DISPATCH) + | stw BASE, L->base + | cmplw TMP0, TMP1 + | stw PC, SAVE_PC + | bge >5 + |1: + if (op == BC_TNEW) { + | rlwinm CARG2, RD, 29, 21, 31 + | rlwinm CARG3, RD, 18, 27, 31 + | cmpwi CARG2, 0x7ff + | li TMP1, 0x801 + | iseleq CARG2, TMP1, CARG2 + | bl extern lj_tab_new // (lua_State *L, int32_t asize, uint32_t hbits) + | // Returns Table *. + } else { + | srwi TMP1, RD, 1 + | subfic TMP1, TMP1, -4 + | lwzx CARG2, KBASE, TMP1 // KBASE-4-tab_const*4 + | bl extern lj_tab_dup // (lua_State *L, Table *kt) + | // Returns Table *. + } + | lwz BASE, L->base + | evmergelo TAB:CRET1, TISTAB, TAB:CRET1 + | evstddx TAB:CRET1, BASE, RA + | ins_next + |5: + | mr SAVE0, RD + | bl extern lj_gc_step_fixtop // (lua_State *L) + | mr RD, SAVE0 + | mr CARG1, L + | b <1 + break; + + case BC_GGET: + | // RA = dst*8, RD = str_const*8 (~) + case BC_GSET: + | // RA = src*8, RD = str_const*8 (~) + | lwz LFUNC:TMP2, FRAME_FUNC(BASE) + | srwi TMP1, RD, 1 + | lwz TAB:RB, LFUNC:TMP2->env + | subfic TMP1, TMP1, -4 + | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4 + if (op == BC_GGET) { + | b ->BC_TGETS_Z + } else { + | b ->BC_TSETS_Z + } + break; + + case BC_TGETV: + | // RA = dst*8, RB = table*8, RC = key*8 + | evlddx TAB:RB, BASE, RB + | evlddx RC, BASE, RC + | checktab TAB:RB + | checkfail ->vmeta_tgetv + | checknum RC + | checkfail >5 + | // Convert number key to integer + | efdctsi TMP2, RC + | lwz TMP0, TAB:RB->asize + | efdcfsi TMP1, TMP2 + | cmplw cr0, TMP0, TMP2 + | efdcmpeq cr1, RC, TMP1 + | lwz TMP1, TAB:RB->array + | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+gt + | slwi TMP2, TMP2, 3 + | ble ->vmeta_tgetv // Integer key and in array part? + | evlddx TMP1, TMP1, TMP2 + | checknil TMP1 + | checkok >2 + |1: + | evstddx TMP1, BASE, RA + | ins_next + | + |2: // Check for __index if table value is nil. + | lwz TAB:TMP2, TAB:RB->metatable + | cmplwi TAB:TMP2, 0 + | beq <1 // No metatable: done. + | lbz TMP0, TAB:TMP2->nomm + | andi. TMP0, TMP0, 1<<MM_index + | bne <1 // 'no __index' flag set: done. + | b ->vmeta_tgetv + | + |5: + | checkstr STR:RC // String key? + | checkok ->BC_TGETS_Z + | b ->vmeta_tgetv + break; + case BC_TGETS: + | // RA = dst*8, RB = table*8, RC = str_const*8 (~) + | evlddx TAB:RB, BASE, RB + | srwi TMP1, RC, 1 + | checktab TAB:RB + | subfic TMP1, TMP1, -4 + | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4 + | checkfail ->vmeta_tgets1 + |->BC_TGETS_Z: + | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8 + | lwz TMP0, TAB:RB->hmask + | lwz TMP1, STR:RC->hash + | lwz NODE:TMP2, TAB:RB->node + | evmergelo STR:RC, TISSTR, STR:RC + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | slwi TMP0, TMP1, 5 + | slwi TMP1, TMP1, 3 + | sub TMP1, TMP0, TMP1 + | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + |1: + | evldd TMP0, NODE:TMP2->key + | evldd TMP1, NODE:TMP2->val + | evcmpeq TMP0, STR:RC + | checkanyfail >4 + | checknil TMP1 + | checkok >5 // Key found, but nil value? + |3: + | evstddx TMP1, BASE, RA + | ins_next + | + |4: // Follow hash chain. + | lwz NODE:TMP2, NODE:TMP2->next + | cmplwi NODE:TMP2, 0 + | bne <1 + | // End of hash chain: key not found, nil result. + | evmr TMP1, TISNIL + | + |5: // Check for __index if table value is nil. + | lwz TAB:TMP2, TAB:RB->metatable + | cmplwi TAB:TMP2, 0 + | beq <3 // No metatable: done. + | lbz TMP0, TAB:TMP2->nomm + | andi. TMP0, TMP0, 1<<MM_index + | bne <3 // 'no __index' flag set: done. + | b ->vmeta_tgets + break; + case BC_TGETB: + | // RA = dst*8, RB = table*8, RC = index*8 + | evlddx TAB:RB, BASE, RB + | srwi TMP0, RC, 3 + | checktab TAB:RB + | checkfail ->vmeta_tgetb + | lwz TMP1, TAB:RB->asize + | lwz TMP2, TAB:RB->array + | cmplw TMP0, TMP1 + | bge ->vmeta_tgetb + | evlddx TMP1, TMP2, RC + | checknil TMP1 + | checkok >5 + |1: + | ins_next1 + | evstddx TMP1, BASE, RA + | ins_next2 + | + |5: // Check for __index if table value is nil. + | lwz TAB:TMP2, TAB:RB->metatable + | cmplwi TAB:TMP2, 0 + | beq <1 // No metatable: done. + | lbz TMP2, TAB:TMP2->nomm + | andi. TMP2, TMP2, 1<<MM_index + | bne <1 // 'no __index' flag set: done. + | b ->vmeta_tgetb // Caveat: preserve TMP0! + break; + + case BC_TSETV: + | // RA = src*8, RB = table*8, RC = key*8 + | evlddx TAB:RB, BASE, RB + | evlddx RC, BASE, RC + | checktab TAB:RB + | checkfail ->vmeta_tsetv + | checknum RC + | checkfail >5 + | // Convert number key to integer + | efdctsi TMP2, RC + | evlddx SAVE0, BASE, RA + | lwz TMP0, TAB:RB->asize + | efdcfsi TMP1, TMP2 + | cmplw cr0, TMP0, TMP2 + | efdcmpeq cr1, RC, TMP1 + | lwz TMP1, TAB:RB->array + | crand 4*cr0+gt, 4*cr0+gt, 4*cr1+gt + | slwi TMP0, TMP2, 3 + | ble ->vmeta_tsetv // Integer key and in array part? + | lbz TMP3, TAB:RB->marked + | evlddx TMP2, TMP1, TMP0 + | checknil TMP2 + | checkok >3 + |1: + | andi. TMP2, TMP3, LJ_GC_BLACK // isblack(table) + | evstddx SAVE0, TMP1, TMP0 + | bne >7 + |2: + | ins_next + | + |3: // Check for __newindex if previous value is nil. + | lwz TAB:TMP2, TAB:RB->metatable + | cmplwi TAB:TMP2, 0 + | beq <1 // No metatable: done. + | lbz TMP2, TAB:TMP2->nomm + | andi. TMP2, TMP2, 1<<MM_newindex + | bne <1 // 'no __newindex' flag set: done. + | b ->vmeta_tsetv + | + |5: + | checkstr STR:RC // String key? + | checkok ->BC_TSETS_Z + | b ->vmeta_tsetv + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0 + | b <2 + break; + case BC_TSETS: + | // RA = src*8, RB = table*8, RC = str_const*8 (~) + | evlddx TAB:RB, BASE, RB + | srwi TMP1, RC, 1 + | checktab TAB:RB + | subfic TMP1, TMP1, -4 + | lwzx STR:RC, KBASE, TMP1 // KBASE-4-str_const*4 + | checkfail ->vmeta_tsets1 + |->BC_TSETS_Z: + | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = src*8 + | lwz TMP0, TAB:RB->hmask + | lwz TMP1, STR:RC->hash + | lwz NODE:TMP2, TAB:RB->node + | evmergelo STR:RC, TISSTR, STR:RC + | stb ZERO, TAB:RB->nomm // Clear metamethod cache. + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | evlddx SAVE0, BASE, RA + | slwi TMP0, TMP1, 5 + | slwi TMP1, TMP1, 3 + | sub TMP1, TMP0, TMP1 + | lbz TMP3, TAB:RB->marked + | add NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + |1: + | evldd TMP0, NODE:TMP2->key + | evldd TMP1, NODE:TMP2->val + | evcmpeq TMP0, STR:RC + | checkanyfail >5 + | checknil TMP1 + | checkok >4 // Key found, but nil value? + |2: + | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table) + | evstdd SAVE0, NODE:TMP2->val + | bne >7 + |3: + | ins_next + | + |4: // Check for __newindex if previous value is nil. + | lwz TAB:TMP1, TAB:RB->metatable + | cmplwi TAB:TMP1, 0 + | beq <2 // No metatable: done. + | lbz TMP0, TAB:TMP1->nomm + | andi. TMP0, TMP0, 1<<MM_newindex + | bne <2 // 'no __newindex' flag set: done. + | b ->vmeta_tsets + | + |5: // Follow hash chain. + | lwz NODE:TMP2, NODE:TMP2->next + | cmplwi NODE:TMP2, 0 + | bne <1 + | // End of hash chain: key not found, add a new one. + | + | // But check for __newindex first. + | lwz TAB:TMP1, TAB:RB->metatable + | la CARG3, DISPATCH_GL(tmptv)(DISPATCH) + | stw PC, SAVE_PC + | mr CARG1, L + | cmplwi TAB:TMP1, 0 + | stw BASE, L->base + | beq >6 // No metatable: continue. + | lbz TMP0, TAB:TMP1->nomm + | andi. TMP0, TMP0, 1<<MM_newindex + | beq ->vmeta_tsets // 'no __newindex' flag NOT set: check. + |6: + | mr CARG2, TAB:RB + | evstdd STR:RC, 0(CARG3) + | bl extern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k) + | // Returns TValue *. + | lwz BASE, L->base + | evstdd SAVE0, 0(CRET1) + | b <3 // No 2nd write barrier needed. + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0 + | b <3 + break; + case BC_TSETB: + | // RA = src*8, RB = table*8, RC = index*8 + | evlddx TAB:RB, BASE, RB + | srwi TMP0, RC, 3 + | checktab TAB:RB + | checkfail ->vmeta_tsetb + | lwz TMP1, TAB:RB->asize + | lwz TMP2, TAB:RB->array + | lbz TMP3, TAB:RB->marked + | cmplw TMP0, TMP1 + | evlddx SAVE0, BASE, RA + | bge ->vmeta_tsetb + | evlddx TMP1, TMP2, RC + | checknil TMP1 + | checkok >5 + |1: + | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table) + | evstddx SAVE0, TMP2, RC + | bne >7 + |2: + | ins_next + | + |5: // Check for __newindex if previous value is nil. + | lwz TAB:TMP1, TAB:RB->metatable + | cmplwi TAB:TMP1, 0 + | beq <1 // No metatable: done. + | lbz TMP1, TAB:TMP1->nomm + | andi. TMP1, TMP1, 1<<MM_newindex + | bne <1 // 'no __newindex' flag set: done. + | b ->vmeta_tsetb // Caveat: preserve TMP0! + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0 + | b <2 + break; + + case BC_TSETM: + | // RA = base*8 (table at base-1), RD = num_const*8 (start index) + | add RA, BASE, RA + |1: + | add TMP3, KBASE, RD + | lwz TAB:CARG2, -4(RA) // Guaranteed to be a table. + | addic. TMP0, MULTRES, -8 + | lwz TMP3, 4(TMP3) // Integer constant is in lo-word. + | srwi CARG3, TMP0, 3 + | beq >4 // Nothing to copy? + | add CARG3, CARG3, TMP3 + | lwz TMP2, TAB:CARG2->asize + | slwi TMP1, TMP3, 3 + | lbz TMP3, TAB:CARG2->marked + | cmplw CARG3, TMP2 + | add TMP2, RA, TMP0 + | lwz TMP0, TAB:CARG2->array + | bgt >5 + | add TMP1, TMP1, TMP0 + | andi. TMP0, TMP3, LJ_GC_BLACK // isblack(table) + |3: // Copy result slots to table. + | evldd TMP0, 0(RA) + | addi RA, RA, 8 + | cmpw cr1, RA, TMP2 + | evstdd TMP0, 0(TMP1) + | addi TMP1, TMP1, 8 + | blt cr1, <3 + | bne >7 + |4: + | ins_next + | + |5: // Need to resize array part. + | stw BASE, L->base + | mr CARG1, L + | stw PC, SAVE_PC + | mr SAVE0, RD + | bl extern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize) + | // Must not reallocate the stack. + | mr RD, SAVE0 + | b <1 + | + |7: // Possible table write barrier for any value. Skip valiswhite check. + | barrierback TAB:CARG2, TMP3, TMP0 + | b <4 + break; + + /* -- Calls and vararg handling ----------------------------------------- */ + + case BC_CALLM: + | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8 + | add NARGS8:RC, NARGS8:RC, MULTRES + | // Fall through. Assumes BC_CALL follows. + break; + case BC_CALL: + | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8 + | evlddx LFUNC:RB, BASE, RA + | mr TMP2, BASE + | add BASE, BASE, RA + | subi NARGS8:RC, NARGS8:RC, 8 + | checkfunc LFUNC:RB + | addi BASE, BASE, 8 + | checkfail ->vmeta_call + | ins_call + break; + + case BC_CALLMT: + | // RA = base*8, (RB = 0,) RC = extra_nargs*8 + | add NARGS8:RC, NARGS8:RC, MULTRES + | // Fall through. Assumes BC_CALLT follows. + break; + case BC_CALLT: + | // RA = base*8, (RB = 0,) RC = (nargs+1)*8 + | evlddx LFUNC:RB, BASE, RA + | add RA, BASE, RA + | lwz TMP1, FRAME_PC(BASE) + | subi NARGS8:RC, NARGS8:RC, 8 + | checkfunc LFUNC:RB + | addi RA, RA, 8 + | checkfail ->vmeta_callt + |->BC_CALLT_Z: + | andi. TMP0, TMP1, FRAME_TYPE // Caveat: preserve cr0 until the crand. + | lbz TMP3, LFUNC:RB->ffid + | xori TMP2, TMP1, FRAME_VARG + | cmplwi cr1, NARGS8:RC, 0 + | bne >7 + |1: + | stw LFUNC:RB, FRAME_FUNC(BASE) // Copy function down, but keep PC. + | li TMP2, 0 + | cmplwi cr7, TMP3, 1 // (> FF_C) Calling a fast function? + | beq cr1, >3 + |2: + | addi TMP3, TMP2, 8 + | evlddx TMP0, RA, TMP2 + | cmplw cr1, TMP3, NARGS8:RC + | evstddx TMP0, BASE, TMP2 + | mr TMP2, TMP3 + | bne cr1, <2 + |3: + | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+gt + | beq >5 + |4: + | ins_callt + | + |5: // Tailcall to a fast function with a Lua frame below. + | lwz INS, -4(TMP1) + | decode_RA8 RA, INS + | sub TMP1, BASE, RA + | lwz LFUNC:TMP1, FRAME_FUNC-8(TMP1) + | lwz TMP1, LFUNC:TMP1->pc + | lwz KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE. + | b <4 + | + |7: // Tailcall from a vararg function. + | andi. TMP0, TMP2, FRAME_TYPEP + | bne <1 // Vararg frame below? + | sub BASE, BASE, TMP2 // Relocate BASE down. + | lwz TMP1, FRAME_PC(BASE) + | andi. TMP0, TMP1, FRAME_TYPE + | b <1 + break; + + case BC_ITERC: + | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8)) + | subi RA, RA, 24 // evldd doesn't support neg. offsets. + | mr TMP2, BASE + | evlddx LFUNC:RB, BASE, RA + | add BASE, BASE, RA + | evldd TMP0, 8(BASE) + | evldd TMP1, 16(BASE) + | evstdd LFUNC:RB, 24(BASE) // Copy callable. + | checkfunc LFUNC:RB + | evstdd TMP0, 32(BASE) // Copy state. + | li NARGS8:RC, 16 // Iterators get 2 arguments. + | evstdd TMP1, 40(BASE) // Copy control var. + | addi BASE, BASE, 32 + | checkfail ->vmeta_call + | ins_call + break; + + case BC_ITERN: + | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 (2+1)*8) + |.if JIT + | // NYI: add hotloop, record BC_ITERN. + |.endif + | add RA, BASE, RA + | lwz TAB:RB, -12(RA) + | lwz RC, -4(RA) // Get index from control var. + | lwz TMP0, TAB:RB->asize + | lwz TMP1, TAB:RB->array + | addi PC, PC, 4 + |1: // Traverse array part. + | cmplw RC, TMP0 + | slwi TMP3, RC, 3 + | bge >5 // Index points after array part? + | evlddx TMP2, TMP1, TMP3 + | checknil TMP2 + | lwz INS, -4(PC) + | checkok >4 + | efdcfsi TMP0, RC + | addi RC, RC, 1 + | addis TMP3, PC, -(BCBIAS_J*4 >> 16) + | evstdd TMP2, 8(RA) + | decode_RD4 TMP1, INS + | stw RC, -4(RA) // Update control var. + | add PC, TMP1, TMP3 + | evstdd TMP0, 0(RA) + |3: + | ins_next + | + |4: // Skip holes in array part. + | addi RC, RC, 1 + | b <1 + | + |5: // Traverse hash part. + | lwz TMP1, TAB:RB->hmask + | sub RC, RC, TMP0 + | lwz TMP2, TAB:RB->node + |6: + | cmplw RC, TMP1 // End of iteration? Branch to ITERL+1. + | slwi TMP3, RC, 5 + | bgt <3 + | slwi RB, RC, 3 + | sub TMP3, TMP3, RB + | evlddx RB, TMP2, TMP3 + | add NODE:TMP3, TMP2, TMP3 + | checknil RB + | lwz INS, -4(PC) + | checkok >7 + | evldd TMP3, NODE:TMP3->key + | addis TMP2, PC, -(BCBIAS_J*4 >> 16) + | evstdd RB, 8(RA) + | add RC, RC, TMP0 + | decode_RD4 TMP1, INS + | evstdd TMP3, 0(RA) + | addi RC, RC, 1 + | add PC, TMP1, TMP2 + | stw RC, -4(RA) // Update control var. + | b <3 + | + |7: // Skip holes in hash part. + | addi RC, RC, 1 + | b <6 + break; + + case BC_ISNEXT: + | // RA = base*8, RD = target (points to ITERN) + | add RA, BASE, RA + | li TMP2, -24 + | evlddx CFUNC:TMP1, RA, TMP2 + | lwz TMP2, -16(RA) + | lwz TMP3, -8(RA) + | evmergehi TMP0, CFUNC:TMP1, CFUNC:TMP1 + | cmpwi cr0, TMP2, LJ_TTAB + | cmpwi cr1, TMP0, LJ_TFUNC + | cmpwi cr6, TMP3, LJ_TNIL + | bne cr1, >5 + | lbz TMP1, CFUNC:TMP1->ffid + | crand 4*cr0+eq, 4*cr0+eq, 4*cr6+eq + | cmpwi cr7, TMP1, FF_next_N + | srwi TMP0, RD, 1 + | crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq + | add TMP3, PC, TMP0 + | bne cr0, >5 + | lus TMP1, 0xfffe + | ori TMP1, TMP1, 0x7fff + | stw ZERO, -4(RA) // Initialize control var. + | stw TMP1, -8(RA) + | addis PC, TMP3, -(BCBIAS_J*4 >> 16) + |1: + | ins_next + |5: // Despecialize bytecode if any of the checks fail. + | li TMP0, BC_JMP + | li TMP1, BC_ITERC + | stb TMP0, -1(PC) + | addis PC, TMP3, -(BCBIAS_J*4 >> 16) + | stb TMP1, 3(PC) + | b <1 + break; + + case BC_VARG: + | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8 + | lwz TMP0, FRAME_PC(BASE) + | add RC, BASE, RC + | add RA, BASE, RA + | addi RC, RC, FRAME_VARG + | add TMP2, RA, RB + | subi TMP3, BASE, 8 // TMP3 = vtop + | sub RC, RC, TMP0 // RC = vbase + | // Note: RC may now be even _above_ BASE if nargs was < numparams. + | cmplwi cr1, RB, 0 + | sub. TMP1, TMP3, RC + | beq cr1, >5 // Copy all varargs? + | subi TMP2, TMP2, 16 + | ble >2 // No vararg slots? + |1: // Copy vararg slots to destination slots. + | evldd TMP0, 0(RC) + | addi RC, RC, 8 + | evstdd TMP0, 0(RA) + | cmplw RA, TMP2 + | cmplw cr1, RC, TMP3 + | bge >3 // All destination slots filled? + | addi RA, RA, 8 + | blt cr1, <1 // More vararg slots? + |2: // Fill up remainder with nil. + | evstdd TISNIL, 0(RA) + | cmplw RA, TMP2 + | addi RA, RA, 8 + | blt <2 + |3: + | ins_next + | + |5: // Copy all varargs. + | lwz TMP0, L->maxstack + | li MULTRES, 8 // MULTRES = (0+1)*8 + | ble <3 // No vararg slots? + | add TMP2, RA, TMP1 + | cmplw TMP2, TMP0 + | addi MULTRES, TMP1, 8 + | bgt >7 + |6: + | evldd TMP0, 0(RC) + | addi RC, RC, 8 + | evstdd TMP0, 0(RA) + | cmplw RC, TMP3 + | addi RA, RA, 8 + | blt <6 // More vararg slots? + | b <3 + | + |7: // Grow stack for varargs. + | mr CARG1, L + | stw RA, L->top + | sub SAVE0, RC, BASE // Need delta, because BASE may change. + | stw BASE, L->base + | sub RA, RA, BASE + | stw PC, SAVE_PC + | srwi CARG2, TMP1, 3 + | bl extern lj_state_growstack // (lua_State *L, int n) + | lwz BASE, L->base + | add RA, BASE, RA + | add RC, BASE, SAVE0 + | subi TMP3, BASE, 8 + | b <6 + break; + + /* -- Returns ----------------------------------------------------------- */ + + case BC_RETM: + | // RA = results*8, RD = extra_nresults*8 + | add RD, RD, MULTRES // MULTRES >= 8, so RD >= 8. + | // Fall through. Assumes BC_RET follows. + break; + + case BC_RET: + | // RA = results*8, RD = (nresults+1)*8 + | lwz PC, FRAME_PC(BASE) + | add RA, BASE, RA + | mr MULTRES, RD + |1: + | andi. TMP0, PC, FRAME_TYPE + | xori TMP1, PC, FRAME_VARG + | bne ->BC_RETV_Z + | + |->BC_RET_Z: + | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return + | lwz INS, -4(PC) + | cmpwi RD, 8 + | subi TMP2, BASE, 8 + | subi RC, RD, 8 + | decode_RB8 RB, INS + | beq >3 + | li TMP1, 0 + |2: + | addi TMP3, TMP1, 8 + | evlddx TMP0, RA, TMP1 + | cmpw TMP3, RC + | evstddx TMP0, TMP2, TMP1 + | beq >3 + | addi TMP1, TMP3, 8 + | evlddx TMP0, RA, TMP3 + | cmpw TMP1, RC + | evstddx TMP0, TMP2, TMP3 + | bne <2 + |3: + |5: + | cmplw RB, RD + | decode_RA8 RA, INS + | bgt >6 + | sub BASE, TMP2, RA + | lwz LFUNC:TMP1, FRAME_FUNC(BASE) + | ins_next1 + | lwz TMP1, LFUNC:TMP1->pc + | lwz KBASE, PC2PROTO(k)(TMP1) + | ins_next2 + | + |6: // Fill up results with nil. + | subi TMP1, RD, 8 + | addi RD, RD, 8 + | evstddx TISNIL, TMP2, TMP1 + | b <5 + | + |->BC_RETV_Z: // Non-standard return case. + | andi. TMP2, TMP1, FRAME_TYPEP + | bne ->vm_return + | // Return from vararg function: relocate BASE down. + | sub BASE, BASE, TMP1 + | lwz PC, FRAME_PC(BASE) + | b <1 + break; + + case BC_RET0: case BC_RET1: + | // RA = results*8, RD = (nresults+1)*8 + | lwz PC, FRAME_PC(BASE) + | add RA, BASE, RA + | mr MULTRES, RD + | andi. TMP0, PC, FRAME_TYPE + | xori TMP1, PC, FRAME_VARG + | bne ->BC_RETV_Z + | + | lwz INS, -4(PC) + | subi TMP2, BASE, 8 + | decode_RB8 RB, INS + if (op == BC_RET1) { + | evldd TMP0, 0(RA) + | evstdd TMP0, 0(TMP2) + } + |5: + | cmplw RB, RD + | decode_RA8 RA, INS + | bgt >6 + | sub BASE, TMP2, RA + | lwz LFUNC:TMP1, FRAME_FUNC(BASE) + | ins_next1 + | lwz TMP1, LFUNC:TMP1->pc + | lwz KBASE, PC2PROTO(k)(TMP1) + | ins_next2 + | + |6: // Fill up results with nil. + | subi TMP1, RD, 8 + | addi RD, RD, 8 + | evstddx TISNIL, TMP2, TMP1 + | b <5 + break; + + /* -- Loops and branches ------------------------------------------------ */ + + case BC_FORL: + |.if JIT + | hotloop + |.endif + | // Fall through. Assumes BC_IFORL follows. + break; + + case BC_JFORI: + case BC_JFORL: +#if !LJ_HASJIT + break; +#endif + case BC_FORI: + case BC_IFORL: + | // RA = base*8, RD = target (after end of loop or start of loop) + vk = (op == BC_IFORL || op == BC_JFORL); + | add RA, BASE, RA + | evldd TMP1, FORL_IDX*8(RA) + | evldd TMP3, FORL_STEP*8(RA) + | evldd TMP2, FORL_STOP*8(RA) + if (!vk) { + | evcmpgtu cr0, TMP1, TISNUM + | evcmpgtu cr7, TMP3, TISNUM + | evcmpgtu cr1, TMP2, TISNUM + | cror 4*cr0+lt, 4*cr0+lt, 4*cr7+lt + | cror 4*cr0+lt, 4*cr0+lt, 4*cr1+lt + | blt ->vmeta_for + } + if (vk) { + | efdadd TMP1, TMP1, TMP3 + | evstdd TMP1, FORL_IDX*8(RA) + } + | evcmpgts TMP3, TISNIL + | evstdd TMP1, FORL_EXT*8(RA) + | bge >2 + | efdcmpgt TMP1, TMP2 + |1: + if (op != BC_JFORL) { + | srwi RD, RD, 1 + | add RD, PC, RD + if (op == BC_JFORI) { + | addis PC, RD, -(BCBIAS_J*4 >> 16) + } else { + | addis RD, RD, -(BCBIAS_J*4 >> 16) + } + } + if (op == BC_FORI) { + | iselgt PC, RD, PC + } else if (op == BC_IFORL) { + | iselgt PC, PC, RD + } else { + | ble =>BC_JLOOP + } + | ins_next + |2: + | efdcmpgt TMP2, TMP1 + | b <1 + break; + + case BC_ITERL: + |.if JIT + | hotloop + |.endif + | // Fall through. Assumes BC_IITERL follows. + break; + + case BC_JITERL: +#if !LJ_HASJIT + break; +#endif + case BC_IITERL: + | // RA = base*8, RD = target + | evlddx TMP1, BASE, RA + | subi RA, RA, 8 + | checknil TMP1 + | checkok >1 // Stop if iterator returned nil. + if (op == BC_JITERL) { + | NYI + } else { + | branch_RD // Otherwise save control var + branch. + | evstddx TMP1, BASE, RA + } + |1: + | ins_next + break; + + case BC_LOOP: + | // RA = base*8, RD = target (loop extent) + | // Note: RA/RD is only used by trace recorder to determine scope/extent + | // This opcode does NOT jump, it's only purpose is to detect a hot loop. + |.if JIT + | hotloop + |.endif + | // Fall through. Assumes BC_ILOOP follows. + break; + + case BC_ILOOP: + | // RA = base*8, RD = target (loop extent) + | ins_next + break; + + case BC_JLOOP: + |.if JIT + | NYI + |.endif + break; + + case BC_JMP: + | // RA = base*8 (only used by trace recorder), RD = target + | branch_RD + | ins_next + break; + + /* -- Function headers -------------------------------------------------- */ + + case BC_FUNCF: + |.if JIT + | hotcall + |.endif + case BC_FUNCV: /* NYI: compiled vararg functions. */ + | // Fall through. Assumes BC_IFUNCF/BC_IFUNCV follow. + break; + + case BC_JFUNCF: +#if !LJ_HASJIT + break; +#endif + case BC_IFUNCF: + | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8 + | lwz TMP2, L->maxstack + | lbz TMP1, -4+PC2PROTO(numparams)(PC) + | lwz KBASE, -4+PC2PROTO(k)(PC) + | cmplw RA, TMP2 + | slwi TMP1, TMP1, 3 + | bgt ->vm_growstack_l + | ins_next1 + |2: + | cmplw NARGS8:RC, TMP1 // Check for missing parameters. + | ble >3 + if (op == BC_JFUNCF) { + | NYI + } else { + | ins_next2 + } + | + |3: // Clear missing parameters. + | evstddx TISNIL, BASE, NARGS8:RC + | addi NARGS8:RC, NARGS8:RC, 8 + | b <2 + break; + + case BC_JFUNCV: +#if !LJ_HASJIT + break; +#endif + | NYI // NYI: compiled vararg functions + break; /* NYI: compiled vararg functions. */ + + case BC_IFUNCV: + | // BASE = new base, RA = BASE+framesize*8, RB = LFUNC, RC = nargs*8 + | lwz TMP2, L->maxstack + | add TMP1, BASE, RC + | add TMP0, RA, RC + | stw LFUNC:RB, 4(TMP1) // Store copy of LFUNC. + | addi TMP3, RC, 8+FRAME_VARG + | lwz KBASE, -4+PC2PROTO(k)(PC) + | cmplw TMP0, TMP2 + | stw TMP3, 0(TMP1) // Store delta + FRAME_VARG. + | bge ->vm_growstack_l + | lbz TMP2, -4+PC2PROTO(numparams)(PC) + | mr RA, BASE + | mr RC, TMP1 + | ins_next1 + | cmpwi TMP2, 0 + | addi BASE, TMP1, 8 + | beq >3 + |1: + | cmplw RA, RC // Less args than parameters? + | evldd TMP0, 0(RA) + | bge >4 + | evstdd TISNIL, 0(RA) // Clear old fixarg slot (help the GC). + | addi RA, RA, 8 + |2: + | addic. TMP2, TMP2, -1 + | evstdd TMP0, 8(TMP1) + | addi TMP1, TMP1, 8 + | bne <1 + |3: + | ins_next2 + | + |4: // Clear missing parameters. + | evmr TMP0, TISNIL + | b <2 + break; + + case BC_FUNCC: + case BC_FUNCCW: + | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8 + if (op == BC_FUNCC) { + | lwz TMP3, CFUNC:RB->f + } else { + | lwz TMP3, DISPATCH_GL(wrapf)(DISPATCH) + } + | add TMP1, RA, NARGS8:RC + | lwz TMP2, L->maxstack + | add RC, BASE, NARGS8:RC + | stw BASE, L->base + | cmplw TMP1, TMP2 + | stw RC, L->top + | li_vmstate C + | mtctr TMP3 + if (op == BC_FUNCCW) { + | lwz CARG2, CFUNC:RB->f + } + | mr CARG1, L + | bgt ->vm_growstack_c // Need to grow stack. + | st_vmstate + | bctrl // (lua_State *L [, lua_CFunction f]) + | // Returns nresults. + | lwz TMP1, L->top + | slwi RD, CRET1, 3 + | lwz BASE, L->base + | li_vmstate INTERP + | lwz PC, FRAME_PC(BASE) // Fetch PC of caller. + | sub RA, TMP1, RD // RA = L->top - nresults*8 + | st_vmstate + | b ->vm_returnc + break; + + /* ---------------------------------------------------------------------- */ + + default: + fprintf(stderr, "Error: undefined opcode BC_%s\n", bc_names[op]); + exit(2); + break; + } +} + +static int build_backend(BuildCtx *ctx) +{ + int op; + + dasm_growpc(Dst, BC__MAX); + + build_subroutines(ctx); + + |.code_op + for (op = 0; op < BC__MAX; op++) + build_ins(ctx, (BCOp)op, op); + + return BC__MAX; +} + +/* Emit pseudo frame-info for all assembler functions. */ +static void emit_asm_debug(BuildCtx *ctx) +{ + int i; + switch (ctx->mode) { + case BUILD_elfasm: + fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n"); + fprintf(ctx->fp, + ".Lframe0:\n" + "\t.long .LECIE0-.LSCIE0\n" + ".LSCIE0:\n" + "\t.long 0xffffffff\n" + "\t.byte 0x1\n" + "\t.string \"\"\n" + "\t.uleb128 0x1\n" + "\t.sleb128 -4\n" + "\t.byte 65\n" + "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n" + "\t.align 2\n" + ".LECIE0:\n\n"); + fprintf(ctx->fp, + ".LSFDE0:\n" + "\t.long .LEFDE0-.LASFDE0\n" + ".LASFDE0:\n" + "\t.long .Lframe0\n" + "\t.long .Lbegin\n" + "\t.long %d\n" + "\t.byte 0xe\n\t.uleb128 %d\n" + "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n" + "\t.byte 0x5\n\t.uleb128 70\n\t.sleb128 37\n", + (int)ctx->codesz, CFRAME_SIZE); + for (i = 14; i <= 31; i++) + fprintf(ctx->fp, + "\t.byte %d\n\t.uleb128 %d\n" + "\t.byte 5\n\t.uleb128 %d\n\t.uleb128 %d\n", + 0x80+i, 1+2*(31-i), 1200+i, 2+2*(31-i)); + fprintf(ctx->fp, + "\t.align 2\n" + ".LEFDE0:\n\n"); + fprintf(ctx->fp, "\t.section .eh_frame,\"a\",@progbits\n"); + fprintf(ctx->fp, + ".Lframe1:\n" + "\t.long .LECIE1-.LSCIE1\n" + ".LSCIE1:\n" + "\t.long 0\n" + "\t.byte 0x1\n" + "\t.string \"zPR\"\n" + "\t.uleb128 0x1\n" + "\t.sleb128 -4\n" + "\t.byte 65\n" + "\t.uleb128 6\n" /* augmentation length */ + "\t.byte 0x1b\n" /* pcrel|sdata4 */ + "\t.long lj_err_unwind_dwarf-.\n" + "\t.byte 0x1b\n" /* pcrel|sdata4 */ + "\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n" + "\t.align 2\n" + ".LECIE1:\n\n"); + fprintf(ctx->fp, + ".LSFDE1:\n" + "\t.long .LEFDE1-.LASFDE1\n" + ".LASFDE1:\n" + "\t.long .LASFDE1-.Lframe1\n" + "\t.long .Lbegin-.\n" + "\t.long %d\n" + "\t.uleb128 0\n" /* augmentation length */ + "\t.byte 0xe\n\t.uleb128 %d\n" + "\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n" + "\t.byte 0x5\n\t.uleb128 70\n\t.sleb128 37\n", + (int)ctx->codesz, CFRAME_SIZE); + for (i = 14; i <= 31; i++) + fprintf(ctx->fp, + "\t.byte %d\n\t.uleb128 %d\n" + "\t.byte 5\n\t.uleb128 %d\n\t.uleb128 %d\n", + 0x80+i, 1+2*(31-i), 1200+i, 2+2*(31-i)); + fprintf(ctx->fp, + "\t.align 2\n" + ".LEFDE1:\n\n"); + break; + default: + break; + } +} + |