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Diffstat (limited to 'luajit-2.1/src/vm_mips64.dasc')
| -rw-r--r-- | luajit-2.1/src/vm_mips64.dasc | 5062 |
1 files changed, 5062 insertions, 0 deletions
diff --git a/luajit-2.1/src/vm_mips64.dasc b/luajit-2.1/src/vm_mips64.dasc new file mode 100644 index 0000000..c06270a --- /dev/null +++ b/luajit-2.1/src/vm_mips64.dasc @@ -0,0 +1,5062 @@ +|// Low-level VM code for MIPS64 CPUs. +|// Bytecode interpreter, fast functions and helper functions. +|// Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h +|// +|// Contributed by Djordje Kovacevic and Stefan Pejic from RT-RK.com. +|// Sponsored by Cisco Systems, Inc. +| +|.arch mips64 +|.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: r0 = 0, r26/r27 = reserved, r28 = gp, r29 = sp, r31 = ra +| +|.macro .FPU, a, b +|.if FPU +| a, b +|.endif +|.endmacro +| +|// The following must be C callee-save (but BASE is often refetched). +|.define BASE, r16 // Base of current Lua stack frame. +|.define KBASE, r17 // Constants of current Lua function. +|.define PC, r18 // Next PC. +|.define DISPATCH, r19 // Opcode dispatch table. +|.define LREG, r20 // Register holding lua_State (also in SAVE_L). +|.define MULTRES, r21 // Size of multi-result: (nresults+1)*8. +| +|.define JGL, r30 // On-trace: global_State + 32768. +| +|// Constants for type-comparisons, stores and conversions. C callee-save. +|.define TISNIL, r30 +|.define TISNUM, r22 +|.if FPU +|.define TOBIT, f30 // 2^52 + 2^51. +|.endif +| +|// The following temporaries are not saved across C calls, except for RA. +|.define RA, r23 // Callee-save. +|.define RB, r8 +|.define RC, r9 +|.define RD, r10 +|.define INS, r11 +| +|.define AT, r1 // Assembler temporary. +|.define TMP0, r12 +|.define TMP1, r13 +|.define TMP2, r14 +|.define TMP3, r15 +| +|// MIPS n64 calling convention. +|.define CFUNCADDR, r25 +|.define CARG1, r4 +|.define CARG2, r5 +|.define CARG3, r6 +|.define CARG4, r7 +|.define CARG5, r8 +|.define CARG6, r9 +|.define CARG7, r10 +|.define CARG8, r11 +| +|.define CRET1, r2 +|.define CRET2, r3 +| +|.if FPU +|.define FARG1, f12 +|.define FARG2, f13 +|.define FARG3, f14 +|.define FARG4, f15 +|.define FARG5, f16 +|.define FARG6, f17 +|.define FARG7, f18 +|.define FARG8, f19 +| +|.define FRET1, f0 +|.define FRET2, f2 +|.endif +| +|// Stack layout while in interpreter. Must match with lj_frame.h. +|.if FPU // MIPS64 hard-float. +| +|.define CFRAME_SPACE, 192 // Delta for sp. +| +|//----- 16 byte aligned, <-- sp entering interpreter +|.define SAVE_ERRF, 188(sp) // 32 bit values. +|.define SAVE_NRES, 184(sp) +|.define SAVE_CFRAME, 176(sp) // 64 bit values. +|.define SAVE_L, 168(sp) +|.define SAVE_PC, 160(sp) +|//----- 16 byte aligned +|.define SAVE_GPR_, 80 // .. 80+10*8: 64 bit GPR saves. +|.define SAVE_FPR_, 16 // .. 16+8*8: 64 bit FPR saves. +| +|.else // MIPS64 soft-float +| +|.define CFRAME_SPACE, 128 // Delta for sp. +| +|//----- 16 byte aligned, <-- sp entering interpreter +|.define SAVE_ERRF, 124(sp) // 32 bit values. +|.define SAVE_NRES, 120(sp) +|.define SAVE_CFRAME, 112(sp) // 64 bit values. +|.define SAVE_L, 104(sp) +|.define SAVE_PC, 96(sp) +|//----- 16 byte aligned +|.define SAVE_GPR_, 16 // .. 16+10*8: 64 bit GPR saves. +| +|.endif +| +|.define TMPX, 8(sp) // Unused by interpreter, temp for JIT code. +|.define TMPD, 0(sp) +|//----- 16 byte aligned +| +|.define TMPD_OFS, 0 +| +|.define SAVE_MULTRES, TMPD +| +|//----------------------------------------------------------------------- +| +|.macro saveregs +| daddiu sp, sp, -CFRAME_SPACE +| sd ra, SAVE_GPR_+9*8(sp) +| sd r30, SAVE_GPR_+8*8(sp) +| .FPU sdc1 f31, SAVE_FPR_+7*8(sp) +| sd r23, SAVE_GPR_+7*8(sp) +| .FPU sdc1 f30, SAVE_FPR_+6*8(sp) +| sd r22, SAVE_GPR_+6*8(sp) +| .FPU sdc1 f29, SAVE_FPR_+5*8(sp) +| sd r21, SAVE_GPR_+5*8(sp) +| .FPU sdc1 f28, SAVE_FPR_+4*8(sp) +| sd r20, SAVE_GPR_+4*8(sp) +| .FPU sdc1 f27, SAVE_FPR_+3*8(sp) +| sd r19, SAVE_GPR_+3*8(sp) +| .FPU sdc1 f26, SAVE_FPR_+2*8(sp) +| sd r18, SAVE_GPR_+2*8(sp) +| .FPU sdc1 f25, SAVE_FPR_+1*8(sp) +| sd r17, SAVE_GPR_+1*8(sp) +| .FPU sdc1 f24, SAVE_FPR_+0*8(sp) +| sd r16, SAVE_GPR_+0*8(sp) +|.endmacro +| +|.macro restoreregs_ret +| ld ra, SAVE_GPR_+9*8(sp) +| ld r30, SAVE_GPR_+8*8(sp) +| ld r23, SAVE_GPR_+7*8(sp) +| .FPU ldc1 f31, SAVE_FPR_+7*8(sp) +| ld r22, SAVE_GPR_+6*8(sp) +| .FPU ldc1 f30, SAVE_FPR_+6*8(sp) +| ld r21, SAVE_GPR_+5*8(sp) +| .FPU ldc1 f29, SAVE_FPR_+5*8(sp) +| ld r20, SAVE_GPR_+4*8(sp) +| .FPU ldc1 f28, SAVE_FPR_+4*8(sp) +| ld r19, SAVE_GPR_+3*8(sp) +| .FPU ldc1 f27, SAVE_FPR_+3*8(sp) +| ld r18, SAVE_GPR_+2*8(sp) +| .FPU ldc1 f26, SAVE_FPR_+2*8(sp) +| ld r17, SAVE_GPR_+1*8(sp) +| .FPU ldc1 f25, SAVE_FPR_+1*8(sp) +| ld r16, SAVE_GPR_+0*8(sp) +| .FPU ldc1 f24, SAVE_FPR_+0*8(sp) +| jr ra +| daddiu 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 +|.type SBUF, SBuf +| +|//----------------------------------------------------------------------- +| +|// Trap for not-yet-implemented parts. +|.macro NYI; .long 0xf0f0f0f0; .endmacro +| +|// Macros to mark delay slots. +|.macro ., a; a; .endmacro +|.macro ., a,b; a,b; .endmacro +|.macro ., a,b,c; a,b,c; .endmacro +|.macro ., a,b,c,d; a,b,c,d; .endmacro +| +|.define FRAME_PC, -8 +|.define FRAME_FUNC, -16 +| +|//----------------------------------------------------------------------- +| +|// Endian-specific defines. +|.if ENDIAN_LE +|.define HI, 4 +|.define LO, 0 +|.define OFS_RD, 2 +|.define OFS_RA, 1 +|.define OFS_OP, 0 +|.else +|.define HI, 0 +|.define LO, 4 +|.define OFS_RD, 0 +|.define OFS_RA, 2 +|.define OFS_OP, 3 +|.endif +| +|// Instruction decode. +|.macro decode_OP1, dst, ins; andi dst, ins, 0xff; .endmacro +|.macro decode_OP8a, dst, ins; andi dst, ins, 0xff; .endmacro +|.macro decode_OP8b, dst; sll dst, dst, 3; .endmacro +|.macro decode_RC8a, dst, ins; srl dst, ins, 13; .endmacro +|.macro decode_RC8b, dst; andi dst, dst, 0x7f8; .endmacro +|.macro decode_RD4b, dst; sll dst, dst, 2; .endmacro +|.macro decode_RA8a, dst, ins; srl dst, ins, 5; .endmacro +|.macro decode_RA8b, dst; andi dst, dst, 0x7f8; .endmacro +|.macro decode_RB8a, dst, ins; srl dst, ins, 21; .endmacro +|.macro decode_RB8b, dst; andi dst, dst, 0x7f8; .endmacro +|.macro decode_RD8a, dst, ins; srl dst, ins, 16; .endmacro +|.macro decode_RD8b, dst; sll dst, dst, 3; .endmacro +|.macro decode_RDtoRC8, dst, src; andi dst, src, 0x7f8; .endmacro +| +|// Instruction fetch. +|.macro ins_NEXT1 +| lw INS, 0(PC) +| daddiu PC, PC, 4 +|.endmacro +|// Instruction decode+dispatch. +|.macro ins_NEXT2 +| decode_OP8a TMP1, INS +| decode_OP8b TMP1 +| daddu TMP0, DISPATCH, TMP1 +| decode_RD8a RD, INS +| ld AT, 0(TMP0) +| decode_RA8a RA, INS +| decode_RD8b RD +| jr AT +| decode_RA8b RA +|.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 +| ld PC, LFUNC:RB->pc +| lw INS, 0(PC) +| daddiu PC, PC, 4 +| decode_OP8a TMP1, INS +| decode_RA8a RA, INS +| decode_OP8b TMP1 +| decode_RA8b RA +| daddu TMP0, DISPATCH, TMP1 +| ld TMP0, 0(TMP0) +| jr TMP0 +| daddu RA, RA, BASE +|.endmacro +| +|.macro ins_call +| // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, PC = caller PC +| sd PC, FRAME_PC(BASE) +| ins_callt +|.endmacro +| +|//----------------------------------------------------------------------- +| +|.macro branch_RD +| srl TMP0, RD, 1 +| lui AT, (-(BCBIAS_J*4 >> 16) & 65535) +| addu TMP0, TMP0, AT +| daddu PC, PC, TMP0 +|.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 GG_DISP2GOT (GG_OFS(got) - GG_OFS(dispatch)) +#define DISPATCH_GOT(name) (GG_DISP2GOT + sizeof(void*)*LJ_GOT_##name) +| +#define PC2PROTO(field) ((int)offsetof(GCproto, field)-(int)sizeof(GCproto)) +| +|.macro load_got, func +| ld CFUNCADDR, DISPATCH_GOT(func)(DISPATCH) +|.endmacro +|// Much faster. Sadly, there's no easy way to force the required code layout. +|// .macro call_intern, func; bal extern func; .endmacro +|.macro call_intern, func; jalr CFUNCADDR; .endmacro +|.macro call_extern; jalr CFUNCADDR; .endmacro +|.macro jmp_extern; jr CFUNCADDR; .endmacro +| +|.macro hotcheck, delta, target +| dsrl TMP1, PC, 1 +| andi TMP1, TMP1, 126 +| daddu TMP1, TMP1, DISPATCH +| lhu TMP2, GG_DISP2HOT(TMP1) +| addiu TMP2, TMP2, -delta +| bltz TMP2, target +|. sh TMP2, GG_DISP2HOT(TMP1) +|.endmacro +| +|.macro hotloop +| hotcheck HOTCOUNT_LOOP, ->vm_hotloop +|.endmacro +| +|.macro hotcall +| hotcheck HOTCOUNT_CALL, ->vm_hotcall +|.endmacro +| +|// Set current VM state. Uses TMP0. +|.macro li_vmstate, st; li TMP0, ~LJ_VMST_..st; .endmacro +|.macro st_vmstate; sw TMP0, DISPATCH_GL(vmstate)(DISPATCH); .endmacro +| +|// Move table write barrier back. Overwrites mark and tmp. +|.macro barrierback, tab, mark, tmp, target +| ld tmp, DISPATCH_GL(gc.grayagain)(DISPATCH) +| andi mark, mark, ~LJ_GC_BLACK & 255 // black2gray(tab) +| sd tab, DISPATCH_GL(gc.grayagain)(DISPATCH) +| sb mark, tab->marked +| b target +|. sd tmp, tab->gclist +|.endmacro +| +|// Clear type tag. Isolate lowest 14+32+1=47 bits of reg. +|.macro cleartp, reg; dextm reg, reg, 0, 14; .endmacro +|.macro cleartp, dst, reg; dextm dst, reg, 0, 14; .endmacro +| +|// Set type tag: Merge 17 type bits into bits [15+32=47, 31+32+1=64) of dst. +|.macro settp, dst, tp; dinsu dst, tp, 15, 31; .endmacro +| +|// Extract (negative) type tag. +|.macro gettp, dst, src; dsra dst, src, 47; .endmacro +| +|// Macros to check the TValue type and extract the GCobj. Branch on failure. +|.macro checktp, reg, tp, target +| gettp AT, reg +| daddiu AT, AT, tp +| bnez AT, target +|. cleartp reg +|.endmacro +|.macro checktp, dst, reg, tp, target +| gettp AT, reg +| daddiu AT, AT, tp +| bnez AT, target +|. cleartp dst, reg +|.endmacro +|.macro checkstr, reg, target; checktp reg, -LJ_TSTR, target; .endmacro +|.macro checktab, reg, target; checktp reg, -LJ_TTAB, target; .endmacro +|.macro checkfunc, reg, target; checktp reg, -LJ_TFUNC, target; .endmacro +|.macro checkint, reg, target // Caveat: has delay slot! +| gettp AT, reg +| bne AT, TISNUM, target +|.endmacro +|.macro checknum, reg, target // Caveat: has delay slot! +| gettp AT, reg +| sltiu AT, AT, LJ_TISNUM +| beqz AT, target +|.endmacro +| +|.macro mov_false, reg +| lu reg, 0x8000 +| dsll reg, reg, 32 +| not reg, reg +|.endmacro +|.macro mov_true, reg +| li reg, 0x0001 +| dsll reg, reg, 48 +| not reg, reg +|.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 AT, PC, FRAME_P + | beqz AT, ->cont_dispatch + | + | // Return from pcall or xpcall fast func. + |. mov_true TMP1 + | ld PC, FRAME_PC(TMP2) // Fetch PC of previous frame. + | move BASE, TMP2 // Restore caller base. + | // Prepending may overwrite the pcall frame, so do it at the end. + | sd TMP1, -8(RA) // Prepend true to results. + | daddiu RA, RA, -8 + | + |->vm_returnc: + | addiu RD, RD, 8 // RD = (nresults+1)*8. + | andi TMP0, PC, FRAME_TYPE + | beqz RD, ->vm_unwind_c_eh + |. li CRET1, LUA_YIELD + | beqz TMP0, ->BC_RET_Z // Handle regular return to Lua. + |. move MULTRES, RD + | + |->vm_return: + | // BASE = base, RA = resultptr, RD/MULTRES = (nresults+1)*8, PC = return + | // TMP0 = PC & FRAME_TYPE + | li TMP2, -8 + | xori AT, TMP0, FRAME_C + | and TMP2, PC, TMP2 + | bnez AT, ->vm_returnp + | dsubu TMP2, BASE, TMP2 // TMP2 = previous base. + | + | addiu TMP1, RD, -8 + | sd TMP2, L->base + | li_vmstate C + | lw TMP2, SAVE_NRES + | daddiu BASE, BASE, -16 + | st_vmstate + | beqz TMP1, >2 + |. sll TMP2, TMP2, 3 + |1: + | addiu TMP1, TMP1, -8 + | ld CRET1, 0(RA) + | daddiu RA, RA, 8 + | sd CRET1, 0(BASE) + | bnez TMP1, <1 + |. daddiu BASE, BASE, 8 + | + |2: + | bne TMP2, RD, >6 + |3: + |. sd BASE, L->top // Store new top. + | + |->vm_leave_cp: + | ld TMP0, SAVE_CFRAME // Restore previous C frame. + | move CRET1, r0 // Ok return status for vm_pcall. + | sd TMP0, L->cframe + | + |->vm_leave_unw: + | restoreregs_ret + | + |6: + | ld TMP1, L->maxstack + | slt AT, TMP2, RD + | bnez AT, >7 // Less results wanted? + | // More results wanted. Check stack size and fill up results with nil. + |. slt AT, BASE, TMP1 + | beqz AT, >8 + |. nop + | sd TISNIL, 0(BASE) + | addiu RD, RD, 8 + | b <2 + |. daddiu BASE, BASE, 8 + | + |7: // Less results wanted. + | subu TMP0, RD, TMP2 + | dsubu TMP0, BASE, TMP0 // Either keep top or shrink it. + | b <3 + |. movn BASE, TMP0, TMP2 // LUA_MULTRET+1 case? + | + |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. + | load_got lj_state_growstack + | move MULTRES, RD + | srl CARG2, TMP2, 3 + | call_intern lj_state_growstack // (lua_State *L, int n) + |. move CARG1, L + | lw TMP2, SAVE_NRES + | ld BASE, L->top // Need the (realloced) L->top in BASE. + | move RD, MULTRES + | b <2 + |. sll TMP2, TMP2, 3 + | + |->vm_unwind_c: // Unwind C stack, return from vm_pcall. + | // (void *cframe, int errcode) + | move sp, CARG1 + | move CRET1, CARG2 + |->vm_unwind_c_eh: // Landing pad for external unwinder. + | ld L, SAVE_L + | li TMP0, ~LJ_VMST_C + | ld GL:TMP1, L->glref + | b ->vm_leave_unw + |. sw TMP0, GL:TMP1->vmstate + | + |->vm_unwind_ff: // Unwind C stack, return from ff pcall. + | // (void *cframe) + | li AT, -4 + | and sp, CARG1, AT + |->vm_unwind_ff_eh: // Landing pad for external unwinder. + | ld L, SAVE_L + | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | li TISNIL, LJ_TNIL + | li TISNUM, LJ_TISNUM + | ld BASE, L->base + | ld DISPATCH, L->glref // Setup pointer to dispatch table. + | .FPU mtc1 TMP3, TOBIT + | mov_false TMP1 + | li_vmstate INTERP + | ld PC, FRAME_PC(BASE) // Fetch PC of previous frame. + | .FPU cvt.d.s TOBIT, TOBIT + | daddiu RA, BASE, -8 // Results start at BASE-8. + | daddiu DISPATCH, DISPATCH, GG_G2DISP + | sd TMP1, 0(RA) // Prepend false to error message. + | st_vmstate + | b ->vm_returnc + |. li RD, 16 // 2 results: false + error message. + | + |//----------------------------------------------------------------------- + |//-- Grow stack for calls ----------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_growstack_c: // Grow stack for C function. + | b >2 + |. li CARG2, LUA_MINSTACK + | + |->vm_growstack_l: // Grow stack for Lua function. + | // BASE = new base, RA = BASE+framesize*8, RC = nargs*8, PC = first PC + | daddu RC, BASE, RC + | dsubu RA, RA, BASE + | sd BASE, L->base + | daddiu PC, PC, 4 // Must point after first instruction. + | sd RC, L->top + | srl CARG2, RA, 3 + |2: + | // L->base = new base, L->top = top + | load_got lj_state_growstack + | sd PC, SAVE_PC + | call_intern lj_state_growstack // (lua_State *L, int n) + |. move CARG1, L + | ld BASE, L->base + | ld RC, L->top + | ld LFUNC:RB, FRAME_FUNC(BASE) + | dsubu RC, RC, BASE + | cleartp LFUNC:RB + | // 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 + | move L, CARG1 + | ld DISPATCH, L->glref // Setup pointer to dispatch table. + | move BASE, CARG2 + | lbu TMP1, L->status + | sd L, SAVE_L + | li PC, FRAME_CP + | daddiu TMP0, sp, CFRAME_RESUME + | daddiu DISPATCH, DISPATCH, GG_G2DISP + | sw r0, SAVE_NRES + | sw r0, SAVE_ERRF + | sd CARG1, SAVE_PC // Any value outside of bytecode is ok. + | sd r0, SAVE_CFRAME + | beqz TMP1, >3 + |. sd TMP0, L->cframe + | + | // Resume after yield (like a return). + | sd L, DISPATCH_GL(cur_L)(DISPATCH) + | move RA, BASE + | ld BASE, L->base + | ld TMP1, L->top + | ld PC, FRAME_PC(BASE) + | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | dsubu RD, TMP1, BASE + | .FPU mtc1 TMP3, TOBIT + | sb r0, L->status + | .FPU cvt.d.s TOBIT, TOBIT + | li_vmstate INTERP + | daddiu RD, RD, 8 + | st_vmstate + | move MULTRES, RD + | andi TMP0, PC, FRAME_TYPE + | li TISNIL, LJ_TNIL + | beqz TMP0, ->BC_RET_Z + |. li TISNUM, LJ_TISNUM + | b ->vm_return + |. nop + | + |->vm_pcall: // Setup protected C frame and enter VM. + | // (lua_State *L, TValue *base, int nres1, ptrdiff_t ef) + | saveregs + | sw CARG4, SAVE_ERRF + | b >1 + |. li PC, FRAME_CP + | + |->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). + | ld TMP1, L:CARG1->cframe + | move L, CARG1 + | sw CARG3, SAVE_NRES + | ld DISPATCH, L->glref // Setup pointer to dispatch table. + | sd CARG1, SAVE_L + | move BASE, CARG2 + | daddiu DISPATCH, DISPATCH, GG_G2DISP + | sd CARG1, SAVE_PC // Any value outside of bytecode is ok. + | sd TMP1, SAVE_CFRAME + | sd sp, L->cframe // Add our C frame to cframe chain. + | + |3: // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype). + | sd L, DISPATCH_GL(cur_L)(DISPATCH) + | ld TMP2, L->base // TMP2 = old base (used in vmeta_call). + | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | ld TMP1, L->top + | .FPU mtc1 TMP3, TOBIT + | daddu PC, PC, BASE + | dsubu NARGS8:RC, TMP1, BASE + | li TISNUM, LJ_TISNUM + | dsubu PC, PC, TMP2 // PC = frame delta + frame type + | .FPU cvt.d.s TOBIT, TOBIT + | li_vmstate INTERP + | li TISNIL, LJ_TNIL + | st_vmstate + | + |->vm_call_dispatch: + | // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC + | ld LFUNC:RB, FRAME_FUNC(BASE) + | checkfunc LFUNC:RB, ->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 + | move L, CARG1 + | ld TMP0, L:CARG1->stack + | sd CARG1, SAVE_L + | ld TMP1, L->top + | ld DISPATCH, L->glref // Setup pointer to dispatch table. + | sd CARG1, SAVE_PC // Any value outside of bytecode is ok. + | dsubu TMP0, TMP0, TMP1 // Compute -savestack(L, L->top). + | ld TMP1, L->cframe + | daddiu DISPATCH, DISPATCH, GG_G2DISP + | sw TMP0, SAVE_NRES // Neg. delta means cframe w/o frame. + | sw r0, SAVE_ERRF // No error function. + | sd TMP1, SAVE_CFRAME + | sd sp, L->cframe // Add our C frame to cframe chain. + | sd L, DISPATCH_GL(cur_L)(DISPATCH) + | jalr CARG4 // (lua_State *L, lua_CFunction func, void *ud) + |. move CFUNCADDR, CARG4 + | move BASE, CRET1 + | bnez CRET1, <3 // Else continue with the call. + |. li PC, FRAME_CP + | b ->vm_leave_cp // No base? Just remove C frame. + |. nop + | + |//----------------------------------------------------------------------- + |//-- 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 + | ld TMP0, -32(BASE) // Continuation. + | move RB, BASE + | move BASE, TMP2 // Restore caller BASE. + | ld LFUNC:TMP1, FRAME_FUNC(TMP2) + |.if FFI + | sltiu AT, TMP0, 2 + |.endif + | ld PC, -24(RB) // Restore PC from [cont|PC]. + | cleartp LFUNC:TMP1 + | daddu TMP2, RA, RD + | ld TMP1, LFUNC:TMP1->pc + |.if FFI + | bnez AT, >1 + |.endif + |. sd TISNIL, -8(TMP2) // Ensure one valid arg. + | // BASE = base, RA = resultptr, RB = meta base + | jr TMP0 // Jump to continuation. + |. ld KBASE, PC2PROTO(k)(TMP1) + | + |.if FFI + |1: + | bnez TMP0, ->cont_ffi_callback // cont = 1: return from FFI callback. + | // cont = 0: tailcall from C function. + |. daddiu TMP1, RB, -32 + | b ->vm_call_tail + |. dsubu RC, TMP1, BASE + |.endif + | + |->cont_cat: // RA = resultptr, RB = meta base + | lw INS, -4(PC) + | daddiu CARG2, RB, -32 + | ld CRET1, 0(RA) + | decode_RB8a MULTRES, INS + | decode_RA8a RA, INS + | decode_RB8b MULTRES + | decode_RA8b RA + | daddu TMP1, BASE, MULTRES + | sd BASE, L->base + | dsubu CARG3, CARG2, TMP1 + | bne TMP1, CARG2, ->BC_CAT_Z + |. sd CRET1, 0(CARG2) + | daddu RA, BASE, RA + | b ->cont_nop + |. sd CRET1, 0(RA) + | + |//-- Table indexing metamethods ----------------------------------------- + | + |->vmeta_tgets1: + | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) + | li TMP0, LJ_TSTR + | settp STR:RC, TMP0 + | b >1 + |. sd STR:RC, 0(CARG3) + | + |->vmeta_tgets: + | daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv) + | li TMP0, LJ_TTAB + | li TMP1, LJ_TSTR + | settp TAB:RB, TMP0 + | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv2) + | sd TAB:RB, 0(CARG2) + | settp STR:RC, TMP1 + | b >1 + |. sd STR:RC, 0(CARG3) + | + |->vmeta_tgetb: // TMP0 = index + | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) + | settp TMP0, TISNUM + | sd TMP0, 0(CARG3) + | + |->vmeta_tgetv: + |1: + | load_got lj_meta_tget + | sd BASE, L->base + | sd PC, SAVE_PC + | call_intern lj_meta_tget // (lua_State *L, TValue *o, TValue *k) + |. move CARG1, L + | // Returns TValue * (finished) or NULL (metamethod). + | beqz CRET1, >3 + |. daddiu TMP1, BASE, -FRAME_CONT + | ld CARG1, 0(CRET1) + | ins_next1 + | sd CARG1, 0(RA) + | ins_next2 + | + |3: // Call __index metamethod. + | // BASE = base, L->top = new base, stack = cont/func/t/k + | ld BASE, L->top + | sd PC, -24(BASE) // [cont|PC] + | dsubu PC, BASE, TMP1 + | ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | cleartp LFUNC:RB + | b ->vm_call_dispatch_f + |. li NARGS8:RC, 16 // 2 args for func(t, k). + | + |->vmeta_tgetr: + | load_got lj_tab_getinth + | call_intern lj_tab_getinth // (GCtab *t, int32_t key) + |. nop + | // Returns cTValue * or NULL. + | beqz CRET1, ->BC_TGETR_Z + |. move CARG2, TISNIL + | b ->BC_TGETR_Z + |. ld CARG2, 0(CRET1) + | + |//----------------------------------------------------------------------- + | + |->vmeta_tsets1: + | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) + | li TMP0, LJ_TSTR + | settp STR:RC, TMP0 + | b >1 + |. sd STR:RC, 0(CARG3) + | + |->vmeta_tsets: + | daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv) + | li TMP0, LJ_TTAB + | li TMP1, LJ_TSTR + | settp TAB:RB, TMP0 + | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv2) + | sd TAB:RB, 0(CARG2) + | settp STR:RC, TMP1 + | b >1 + |. sd STR:RC, 0(CARG3) + | + |->vmeta_tsetb: // TMP0 = index + | daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) + | settp TMP0, TISNUM + | sd TMP0, 0(CARG3) + | + |->vmeta_tsetv: + |1: + | load_got lj_meta_tset + | sd BASE, L->base + | sd PC, SAVE_PC + | call_intern lj_meta_tset // (lua_State *L, TValue *o, TValue *k) + |. move CARG1, L + | // Returns TValue * (finished) or NULL (metamethod). + | beqz CRET1, >3 + |. ld CARG1, 0(RA) + | // NOBARRIER: lj_meta_tset ensures the table is not black. + | ins_next1 + | sd CARG1, 0(CRET1) + | ins_next2 + | + |3: // Call __newindex metamethod. + | // BASE = base, L->top = new base, stack = cont/func/t/k/(v) + | daddiu TMP1, BASE, -FRAME_CONT + | ld BASE, L->top + | sd PC, -24(BASE) // [cont|PC] + | dsubu PC, BASE, TMP1 + | ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | cleartp LFUNC:RB + | sd CARG1, 16(BASE) // Copy value to third argument. + | b ->vm_call_dispatch_f + |. li NARGS8:RC, 24 // 3 args for func(t, k, v) + | + |->vmeta_tsetr: + | load_got lj_tab_setinth + | sd BASE, L->base + | sd PC, SAVE_PC + | call_intern lj_tab_setinth // (lua_State *L, GCtab *t, int32_t key) + |. move CARG1, L + | // Returns TValue *. + | b ->BC_TSETR_Z + |. nop + | + |//-- Comparison metamethods --------------------------------------------- + | + |->vmeta_comp: + | // RA/RD point to o1/o2. + | move CARG2, RA + | move CARG3, RD + | load_got lj_meta_comp + | daddiu PC, PC, -4 + | sd BASE, L->base + | sd PC, SAVE_PC + | decode_OP1 CARG4, INS + | call_intern lj_meta_comp // (lua_State *L, TValue *o1, *o2, int op) + |. move CARG1, L + | // Returns 0/1 or TValue * (metamethod). + |3: + | sltiu AT, CRET1, 2 + | beqz AT, ->vmeta_binop + | negu TMP2, CRET1 + |4: + | lhu RD, OFS_RD(PC) + | daddiu PC, PC, 4 + | lui TMP1, (-(BCBIAS_J*4 >> 16) & 65535) + | sll RD, RD, 2 + | addu RD, RD, TMP1 + | and RD, RD, TMP2 + | daddu PC, PC, RD + |->cont_nop: + | ins_next + | + |->cont_ra: // RA = resultptr + | lbu TMP1, -4+OFS_RA(PC) + | ld CRET1, 0(RA) + | sll TMP1, TMP1, 3 + | daddu TMP1, BASE, TMP1 + | b ->cont_nop + |. sd CRET1, 0(TMP1) + | + |->cont_condt: // RA = resultptr + | ld TMP0, 0(RA) + | gettp TMP0, TMP0 + | sltiu AT, TMP0, LJ_TISTRUECOND + | b <4 + |. negu TMP2, AT // Branch if result is true. + | + |->cont_condf: // RA = resultptr + | ld TMP0, 0(RA) + | gettp TMP0, TMP0 + | sltiu AT, TMP0, LJ_TISTRUECOND + | b <4 + |. addiu TMP2, AT, -1 // Branch if result is false. + | + |->vmeta_equal: + | // CARG1/CARG2 point to o1/o2. TMP0 is set to 0/1. + | load_got lj_meta_equal + | cleartp LFUNC:CARG3, CARG2 + | cleartp LFUNC:CARG2, CARG1 + | move CARG4, TMP0 + | daddiu PC, PC, -4 + | sd BASE, L->base + | sd PC, SAVE_PC + | call_intern lj_meta_equal // (lua_State *L, GCobj *o1, *o2, int ne) + |. move CARG1, L + | // Returns 0/1 or TValue * (metamethod). + | b <3 + |. nop + | + |->vmeta_equal_cd: + |.if FFI + | load_got lj_meta_equal_cd + | move CARG2, INS + | daddiu PC, PC, -4 + | sd BASE, L->base + | sd PC, SAVE_PC + | call_intern lj_meta_equal_cd // (lua_State *L, BCIns op) + |. move CARG1, L + | // Returns 0/1 or TValue * (metamethod). + | b <3 + |. nop + |.endif + | + |->vmeta_istype: + | load_got lj_meta_istype + | daddiu PC, PC, -4 + | sd BASE, L->base + | srl CARG2, RA, 3 + | srl CARG3, RD, 3 + | sd PC, SAVE_PC + | call_intern lj_meta_istype // (lua_State *L, BCReg ra, BCReg tp) + |. move CARG1, L + | b ->cont_nop + |. nop + | + |//-- Arithmetic metamethods --------------------------------------------- + | + |->vmeta_unm: + | move RC, RB + | + |->vmeta_arith: + | load_got lj_meta_arith + | sd BASE, L->base + | move CARG2, RA + | sd PC, SAVE_PC + | move CARG3, RB + | move CARG4, RC + | decode_OP1 CARG5, INS // CARG5 == RB. + | call_intern lj_meta_arith // (lua_State *L, TValue *ra,*rb,*rc, BCReg op) + |. move CARG1, L + | // Returns NULL (finished) or TValue * (metamethod). + | beqz CRET1, ->cont_nop + |. nop + | + | // Call metamethod for binary op. + |->vmeta_binop: + | // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2 + | dsubu TMP1, CRET1, BASE + | sd PC, -24(CRET1) // [cont|PC] + | move TMP2, BASE + | daddiu PC, TMP1, FRAME_CONT + | move BASE, CRET1 + | b ->vm_call_dispatch + |. li NARGS8:RC, 16 // 2 args for func(o1, o2). + | + |->vmeta_len: + | // CARG2 already set by BC_LEN. +#if LJ_52 + | move MULTRES, CARG1 +#endif + | load_got lj_meta_len + | sd BASE, L->base + | sd PC, SAVE_PC + | call_intern lj_meta_len // (lua_State *L, TValue *o) + |. move CARG1, L + | // Returns NULL (retry) or TValue * (metamethod base). +#if LJ_52 + | bnez CRET1, ->vmeta_binop // Binop call for compatibility. + |. nop + | b ->BC_LEN_Z + |. move CARG1, MULTRES +#else + | b ->vmeta_binop // Binop call for compatibility. + |. nop +#endif + | + |//-- Call metamethod ---------------------------------------------------- + | + |->vmeta_call: // Resolve and call __call metamethod. + | // TMP2 = old base, BASE = new base, RC = nargs*8 + | load_got lj_meta_call + | sd TMP2, L->base // This is the callers base! + | daddiu CARG2, BASE, -16 + | sd PC, SAVE_PC + | daddu CARG3, BASE, RC + | move MULTRES, NARGS8:RC + | call_intern lj_meta_call // (lua_State *L, TValue *func, TValue *top) + |. move CARG1, L + | ld LFUNC:RB, FRAME_FUNC(BASE) // Guaranteed to be a function here. + | daddiu NARGS8:RC, MULTRES, 8 // Got one more argument now. + | cleartp LFUNC:RB + | ins_call + | + |->vmeta_callt: // Resolve __call for BC_CALLT. + | // BASE = old base, RA = new base, RC = nargs*8 + | load_got lj_meta_call + | sd BASE, L->base + | daddiu CARG2, RA, -16 + | sd PC, SAVE_PC + | daddu CARG3, RA, RC + | move MULTRES, NARGS8:RC + | call_intern lj_meta_call // (lua_State *L, TValue *func, TValue *top) + |. move CARG1, L + | ld RB, FRAME_FUNC(RA) // Guaranteed to be a function here. + | ld TMP1, FRAME_PC(BASE) + | daddiu NARGS8:RC, MULTRES, 8 // Got one more argument now. + | b ->BC_CALLT_Z + |. cleartp LFUNC:CARG3, RB + | + |//-- Argument coercion for 'for' statement ------------------------------ + | + |->vmeta_for: + | load_got lj_meta_for + | sd BASE, L->base + | move CARG2, RA + | sd PC, SAVE_PC + | move MULTRES, INS + | call_intern lj_meta_for // (lua_State *L, TValue *base) + |. move CARG1, L + |.if JIT + | decode_OP1 TMP0, MULTRES + | li AT, BC_JFORI + |.endif + | decode_RA8a RA, MULTRES + | decode_RD8a RD, MULTRES + | decode_RA8b RA + |.if JIT + | beq TMP0, AT, =>BC_JFORI + |. decode_RD8b RD + | b =>BC_FORI + |. nop + |.else + | b =>BC_FORI + |. decode_RD8b RD + |.endif + | + |//----------------------------------------------------------------------- + |//-- Fast functions ----------------------------------------------------- + |//----------------------------------------------------------------------- + | + |.macro .ffunc, name + |->ff_ .. name: + |.endmacro + | + |.macro .ffunc_1, name + |->ff_ .. name: + | beqz NARGS8:RC, ->fff_fallback + |. ld CARG1, 0(BASE) + |.endmacro + | + |.macro .ffunc_2, name + |->ff_ .. name: + | sltiu AT, NARGS8:RC, 16 + | ld CARG1, 0(BASE) + | bnez AT, ->fff_fallback + |. ld CARG2, 8(BASE) + |.endmacro + | + |.macro .ffunc_n, name // Caveat: has delay slot! + |->ff_ .. name: + | ld CARG1, 0(BASE) + | beqz NARGS8:RC, ->fff_fallback + | // Either ldc1 or the 1st instruction of checknum is in the delay slot. + | .FPU ldc1 FARG1, 0(BASE) + | checknum CARG1, ->fff_fallback + |.endmacro + | + |.macro .ffunc_nn, name // Caveat: has delay slot! + |->ff_ .. name: + | ld CARG1, 0(BASE) + | sltiu AT, NARGS8:RC, 16 + | ld CARG2, 8(BASE) + | bnez AT, ->fff_fallback + |. gettp TMP0, CARG1 + | gettp TMP1, CARG2 + | sltiu TMP0, TMP0, LJ_TISNUM + | sltiu TMP1, TMP1, LJ_TISNUM + | .FPU ldc1 FARG1, 0(BASE) + | and TMP0, TMP0, TMP1 + | .FPU ldc1 FARG2, 8(BASE) + | beqz TMP0, ->fff_fallback + |.endmacro + | + |// Inlined GC threshold check. Caveat: uses TMP0 and TMP1 and has delay slot! + |.macro ffgccheck + | ld TMP0, DISPATCH_GL(gc.total)(DISPATCH) + | ld TMP1, DISPATCH_GL(gc.threshold)(DISPATCH) + | dsubu AT, TMP0, TMP1 + | bgezal AT, ->fff_gcstep + |.endmacro + | + |//-- Base library: checks ----------------------------------------------- + |.ffunc_1 assert + | gettp AT, CARG1 + | sltiu AT, AT, LJ_TISTRUECOND + | beqz AT, ->fff_fallback + |. daddiu RA, BASE, -16 + | ld PC, FRAME_PC(BASE) + | addiu RD, NARGS8:RC, 8 // Compute (nresults+1)*8. + | daddu TMP2, RA, RD + | daddiu TMP1, BASE, 8 + | beq BASE, TMP2, ->fff_res // Done if exactly 1 argument. + |. sd CARG1, 0(RA) + |1: + | ld CRET1, 0(TMP1) + | sd CRET1, -16(TMP1) + | bne TMP1, TMP2, <1 + |. daddiu TMP1, TMP1, 8 + | b ->fff_res + |. nop + | + |.ffunc_1 type + | gettp TMP0, CARG1 + | sltu TMP1, TISNUM, TMP0 + | not TMP2, TMP0 + | li TMP3, ~LJ_TISNUM + | movz TMP2, TMP3, TMP1 + | dsll TMP2, TMP2, 3 + | daddu TMP2, CFUNC:RB, TMP2 + | b ->fff_restv + |. ld CARG1, CFUNC:TMP2->upvalue + | + |//-- Base library: getters and setters --------------------------------- + | + |.ffunc_1 getmetatable + | gettp TMP2, CARG1 + | daddiu TMP0, TMP2, -LJ_TTAB + | daddiu TMP1, TMP2, -LJ_TUDATA + | movn TMP0, TMP1, TMP0 + | bnez TMP0, >6 + |. cleartp TAB:CARG1 + |1: // Field metatable must be at same offset for GCtab and GCudata! + | ld TAB:RB, TAB:CARG1->metatable + |2: + | ld STR:RC, DISPATCH_GL(gcroot[GCROOT_MMNAME+MM_metatable])(DISPATCH) + | beqz TAB:RB, ->fff_restv + |. li CARG1, LJ_TNIL + | lw TMP0, TAB:RB->hmask + | lw TMP1, STR:RC->hash + | ld NODE:TMP2, TAB:RB->node + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | dsll TMP0, TMP1, 5 + | dsll TMP1, TMP1, 3 + | dsubu TMP1, TMP0, TMP1 + | daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + | li CARG4, LJ_TSTR + | settp STR:RC, CARG4 // Tagged key to look for. + |3: // Rearranged logic, because we expect _not_ to find the key. + | ld TMP0, NODE:TMP2->key + | ld CARG1, NODE:TMP2->val + | ld NODE:TMP2, NODE:TMP2->next + | beq RC, TMP0, >5 + |. li AT, LJ_TTAB + | bnez NODE:TMP2, <3 + |. nop + |4: + | move CARG1, RB + | b ->fff_restv // Not found, keep default result. + |. settp CARG1, AT + |5: + | bne CARG1, TISNIL, ->fff_restv + |. nop + | b <4 // Ditto for nil value. + |. nop + | + |6: + | sltiu AT, TMP2, LJ_TISNUM + | movn TMP2, TISNUM, AT + | dsll TMP2, TMP2, 3 + | dsubu TMP0, DISPATCH, TMP2 + | b <2 + |. ld TAB:RB, DISPATCH_GL(gcroot[GCROOT_BASEMT])-8(TMP0) + | + |.ffunc_2 setmetatable + | // Fast path: no mt for table yet and not clearing the mt. + | checktp TMP1, CARG1, -LJ_TTAB, ->fff_fallback + | gettp TMP3, CARG2 + | ld TAB:TMP0, TAB:TMP1->metatable + | lbu TMP2, TAB:TMP1->marked + | daddiu AT, TMP3, -LJ_TTAB + | cleartp TAB:CARG2 + | or AT, AT, TAB:TMP0 + | bnez AT, ->fff_fallback + |. andi AT, TMP2, LJ_GC_BLACK // isblack(table) + | beqz AT, ->fff_restv + |. sd TAB:CARG2, TAB:TMP1->metatable + | barrierback TAB:TMP1, TMP2, TMP0, ->fff_restv + | + |.ffunc rawget + | ld CARG2, 0(BASE) + | sltiu AT, NARGS8:RC, 16 + | load_got lj_tab_get + | gettp TMP0, CARG2 + | cleartp CARG2 + | daddiu TMP0, TMP0, -LJ_TTAB + | or AT, AT, TMP0 + | bnez AT, ->fff_fallback + |. daddiu CARG3, BASE, 8 + | call_intern lj_tab_get // (lua_State *L, GCtab *t, cTValue *key) + |. move CARG1, L + | b ->fff_restv + |. ld CARG1, 0(CRET1) + | + |//-- Base library: conversions ------------------------------------------ + | + |.ffunc tonumber + | // Only handles the number case inline (without a base argument). + | ld CARG1, 0(BASE) + | xori AT, NARGS8:RC, 8 // Exactly one number argument. + | gettp TMP1, CARG1 + | sltu TMP0, TISNUM, TMP1 + | or AT, AT, TMP0 + | bnez AT, ->fff_fallback + |. nop + | b ->fff_restv + |. nop + | + |.ffunc_1 tostring + | // Only handles the string or number case inline. + | gettp TMP0, CARG1 + | daddiu AT, TMP0, -LJ_TSTR + | // A __tostring method in the string base metatable is ignored. + | beqz AT, ->fff_restv // String key? + | // Handle numbers inline, unless a number base metatable is present. + |. ld TMP1, DISPATCH_GL(gcroot[GCROOT_BASEMT_NUM])(DISPATCH) + | sltu TMP0, TISNUM, TMP0 + | or TMP0, TMP0, TMP1 + | bnez TMP0, ->fff_fallback + |. sd BASE, L->base // Add frame since C call can throw. + | ffgccheck + |. sd PC, SAVE_PC // Redundant (but a defined value). + | load_got lj_strfmt_number + | move CARG1, L + | call_intern lj_strfmt_number // (lua_State *L, cTValue *o) + |. move CARG2, BASE + | // Returns GCstr *. + | li AT, LJ_TSTR + | settp CRET1, AT + | b ->fff_restv + |. move CARG1, CRET1 + | + |//-- Base library: iterators ------------------------------------------- + | + |.ffunc_1 next + | checktp CARG2, CARG1, -LJ_TTAB, ->fff_fallback + | daddu TMP2, BASE, NARGS8:RC + | sd TISNIL, 0(TMP2) // Set missing 2nd arg to nil. + | ld PC, FRAME_PC(BASE) + | load_got lj_tab_next + | sd BASE, L->base // Add frame since C call can throw. + | sd BASE, L->top // Dummy frame length is ok. + | daddiu CARG3, BASE, 8 + | sd PC, SAVE_PC + | call_intern lj_tab_next // (lua_State *L, GCtab *t, TValue *key) + |. move CARG1, L + | // Returns 0 at end of traversal. + | beqz CRET1, ->fff_restv // End of traversal: return nil. + |. move CARG1, TISNIL + | ld TMP0, 8(BASE) + | daddiu RA, BASE, -16 + | ld TMP2, 16(BASE) + | sd TMP0, 0(RA) + | sd TMP2, 8(RA) + | b ->fff_res + |. li RD, (2+1)*8 + | + |.ffunc_1 pairs + | checktp TAB:TMP1, CARG1, -LJ_TTAB, ->fff_fallback + | ld PC, FRAME_PC(BASE) +#if LJ_52 + | ld TAB:TMP2, TAB:TMP1->metatable + | ld TMP0, CFUNC:RB->upvalue[0] + | bnez TAB:TMP2, ->fff_fallback +#else + | ld TMP0, CFUNC:RB->upvalue[0] +#endif + |. daddiu RA, BASE, -16 + | sd TISNIL, 0(BASE) + | sd CARG1, -8(BASE) + | sd TMP0, 0(RA) + | b ->fff_res + |. li RD, (3+1)*8 + | + |.ffunc_2 ipairs_aux + | checktab CARG1, ->fff_fallback + | checkint CARG2, ->fff_fallback + |. lw TMP0, TAB:CARG1->asize + | ld TMP1, TAB:CARG1->array + | ld PC, FRAME_PC(BASE) + | sextw TMP2, CARG2 + | addiu TMP2, TMP2, 1 + | sltu AT, TMP2, TMP0 + | daddiu RA, BASE, -16 + | zextw TMP0, TMP2 + | settp TMP0, TISNUM + | beqz AT, >2 // Not in array part? + |. sd TMP0, 0(RA) + | dsll TMP3, TMP2, 3 + | daddu TMP3, TMP1, TMP3 + | ld TMP1, 0(TMP3) + |1: + | beq TMP1, TISNIL, ->fff_res // End of iteration, return 0 results. + |. li RD, (0+1)*8 + | sd TMP1, -8(BASE) + | b ->fff_res + |. li RD, (2+1)*8 + |2: // Check for empty hash part first. Otherwise call C function. + | lw TMP0, TAB:CARG1->hmask + | load_got lj_tab_getinth + | beqz TMP0, ->fff_res + |. li RD, (0+1)*8 + | call_intern lj_tab_getinth // (GCtab *t, int32_t key) + |. move CARG2, TMP2 + | // Returns cTValue * or NULL. + | beqz CRET1, ->fff_res + |. li RD, (0+1)*8 + | b <1 + |. ld TMP1, 0(CRET1) + | + |.ffunc_1 ipairs + | checktp TAB:TMP1, CARG1, -LJ_TTAB, ->fff_fallback + | ld PC, FRAME_PC(BASE) +#if LJ_52 + | ld TAB:TMP2, TAB:TMP1->metatable + | ld CFUNC:TMP0, CFUNC:RB->upvalue[0] + | bnez TAB:TMP2, ->fff_fallback +#else + | ld TMP0, CFUNC:RB->upvalue[0] +#endif + | daddiu RA, BASE, -16 + | dsll AT, TISNUM, 47 + | sd CARG1, -8(BASE) + | sd AT, 0(BASE) + | sd CFUNC:TMP0, 0(RA) + | b ->fff_res + |. li RD, (3+1)*8 + | + |//-- Base library: catch errors ---------------------------------------- + | + |.ffunc pcall + | daddiu NARGS8:RC, NARGS8:RC, -8 + | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | bltz NARGS8:RC, ->fff_fallback + |. move TMP2, BASE + | daddiu BASE, BASE, 16 + | // Remember active hook before pcall. + | srl TMP3, TMP3, HOOK_ACTIVE_SHIFT + | andi TMP3, TMP3, 1 + | daddiu PC, TMP3, 16+FRAME_PCALL + | beqz NARGS8:RC, ->vm_call_dispatch + |1: + |. daddu TMP0, BASE, NARGS8:RC + |2: + | ld TMP1, -16(TMP0) + | sd TMP1, -8(TMP0) + | daddiu TMP0, TMP0, -8 + | bne TMP0, BASE, <2 + |. nop + | b ->vm_call_dispatch + |. nop + | + |.ffunc xpcall + | daddiu NARGS8:RC, NARGS8:RC, -16 + | ld CARG1, 0(BASE) + | ld CARG2, 8(BASE) + | bltz NARGS8:RC, ->fff_fallback + |. lbu TMP1, DISPATCH_GL(hookmask)(DISPATCH) + | gettp AT, CARG2 + | daddiu AT, AT, -LJ_TFUNC + | bnez AT, ->fff_fallback // Traceback must be a function. + |. move TMP2, BASE + | daddiu BASE, BASE, 24 + | // Remember active hook before pcall. + | srl TMP3, TMP3, HOOK_ACTIVE_SHIFT + | sd CARG2, 0(TMP2) // Swap function and traceback. + | andi TMP3, TMP3, 1 + | sd CARG1, 8(TMP2) + | beqz NARGS8:RC, ->vm_call_dispatch + |. daddiu PC, TMP3, 24+FRAME_PCALL + | b <1 + |. nop + | + |//-- Coroutine library -------------------------------------------------- + | + |.macro coroutine_resume_wrap, resume + |.if resume + |.ffunc_1 coroutine_resume + | checktp CARG1, CARG1, -LJ_TTHREAD, ->fff_fallback + |.else + |.ffunc coroutine_wrap_aux + | ld L:CARG1, CFUNC:RB->upvalue[0].gcr + | cleartp L:CARG1 + |.endif + | lbu TMP0, L:CARG1->status + | ld TMP1, L:CARG1->cframe + | ld CARG2, L:CARG1->top + | ld TMP2, L:CARG1->base + | addiu AT, TMP0, -LUA_YIELD + | daddu CARG3, CARG2, TMP0 + | daddiu TMP3, CARG2, 8 + | bgtz AT, ->fff_fallback // st > LUA_YIELD? + |. movn CARG2, TMP3, AT + | xor TMP2, TMP2, CARG3 + | bnez TMP1, ->fff_fallback // cframe != 0? + |. or AT, TMP2, TMP0 + | ld TMP0, L:CARG1->maxstack + | beqz AT, ->fff_fallback // base == top && st == 0? + |. ld PC, FRAME_PC(BASE) + | daddu TMP2, CARG2, NARGS8:RC + | sltu AT, TMP0, TMP2 + | bnez AT, ->fff_fallback // Stack overflow? + |. sd PC, SAVE_PC + | sd BASE, L->base + |1: + |.if resume + | daddiu BASE, BASE, 8 // Keep resumed thread in stack for GC. + | daddiu NARGS8:RC, NARGS8:RC, -8 + | daddiu TMP2, TMP2, -8 + |.endif + | sd TMP2, L:CARG1->top + | daddu TMP1, BASE, NARGS8:RC + | move CARG3, CARG2 + | sd BASE, L->top + |2: // Move args to coroutine. + | ld CRET1, 0(BASE) + | sltu AT, BASE, TMP1 + | beqz AT, >3 + |. daddiu BASE, BASE, 8 + | sd CRET1, 0(CARG3) + | b <2 + |. daddiu CARG3, CARG3, 8 + |3: + | bal ->vm_resume // (lua_State *L, TValue *base, 0, 0) + |. move L:RA, L:CARG1 + | // Returns thread status. + |4: + | ld TMP2, L:RA->base + | sltiu AT, CRET1, LUA_YIELD+1 + | ld TMP3, L:RA->top + | li_vmstate INTERP + | ld BASE, L->base + | sd L, DISPATCH_GL(cur_L)(DISPATCH) + | st_vmstate + | beqz AT, >8 + |. dsubu RD, TMP3, TMP2 + | ld TMP0, L->maxstack + | beqz RD, >6 // No results? + |. daddu TMP1, BASE, RD + | sltu AT, TMP0, TMP1 + | bnez AT, >9 // Need to grow stack? + |. daddu TMP3, TMP2, RD + | sd TMP2, L:RA->top // Clear coroutine stack. + | move TMP1, BASE + |5: // Move results from coroutine. + | ld CRET1, 0(TMP2) + | daddiu TMP2, TMP2, 8 + | sltu AT, TMP2, TMP3 + | sd CRET1, 0(TMP1) + | bnez AT, <5 + |. daddiu TMP1, TMP1, 8 + |6: + | andi TMP0, PC, FRAME_TYPE + |.if resume + | mov_true TMP1 + | daddiu RA, BASE, -8 + | sd TMP1, -8(BASE) // Prepend true to results. + | daddiu RD, RD, 16 + |.else + | move RA, BASE + | daddiu RD, RD, 8 + |.endif + |7: + | sd PC, SAVE_PC + | beqz TMP0, ->BC_RET_Z + |. move MULTRES, RD + | b ->vm_return + |. nop + | + |8: // Coroutine returned with error (at co->top-1). + |.if resume + | daddiu TMP3, TMP3, -8 + | mov_false TMP1 + | ld CRET1, 0(TMP3) + | sd TMP3, L:RA->top // Remove error from coroutine stack. + | li RD, (2+1)*8 + | sd TMP1, -8(BASE) // Prepend false to results. + | daddiu RA, BASE, -8 + | sd CRET1, 0(BASE) // Copy error message. + | b <7 + |. andi TMP0, PC, FRAME_TYPE + |.else + | load_got lj_ffh_coroutine_wrap_err + | move CARG2, L:RA + | call_intern lj_ffh_coroutine_wrap_err // (lua_State *L, lua_State *co) + |. move CARG1, L + |.endif + | + |9: // Handle stack expansion on return from yield. + | load_got lj_state_growstack + | srl CARG2, RD, 3 + | call_intern lj_state_growstack // (lua_State *L, int n) + |. move CARG1, L + | b <4 + |. li CRET1, 0 + |.endmacro + | + | coroutine_resume_wrap 1 // coroutine.resume + | coroutine_resume_wrap 0 // coroutine.wrap + | + |.ffunc coroutine_yield + | ld TMP0, L->cframe + | daddu TMP1, BASE, NARGS8:RC + | sd BASE, L->base + | andi TMP0, TMP0, CFRAME_RESUME + | sd TMP1, L->top + | beqz TMP0, ->fff_fallback + |. li CRET1, LUA_YIELD + | sd r0, L->cframe + | b ->vm_leave_unw + |. sb CRET1, L->status + | + |//-- Math library ------------------------------------------------------- + | + |.ffunc_1 math_abs + | gettp CARG2, CARG1 + | daddiu AT, CARG2, -LJ_TISNUM + | bnez AT, >1 + |. sextw TMP1, CARG1 + | sra TMP0, TMP1, 31 // Extract sign. + | xor TMP1, TMP1, TMP0 + | dsubu CARG1, TMP1, TMP0 + | dsll TMP3, CARG1, 32 + | bgez TMP3, ->fff_restv + |. settp CARG1, TISNUM + | li CARG1, 0x41e0 // 2^31 as a double. + | b ->fff_restv + |. dsll CARG1, CARG1, 48 + |1: + | sltiu AT, CARG2, LJ_TISNUM + | beqz AT, ->fff_fallback + |. dextm CARG1, CARG1, 0, 30 + |// fallthrough + | + |->fff_restv: + | // CARG1 = TValue result. + | ld PC, FRAME_PC(BASE) + | daddiu RA, BASE, -16 + | sd CARG1, -16(BASE) + |->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 + | bnez TMP0, ->vm_return + |. move MULTRES, RD + | lw INS, -4(PC) + | decode_RB8a RB, INS + | decode_RB8b RB + |5: + | sltu AT, RD, RB + | bnez AT, >6 // More results expected? + |. decode_RA8a TMP0, INS + | decode_RA8b TMP0 + | ins_next1 + | // Adjust BASE. KBASE is assumed to be set for the calling frame. + | dsubu BASE, RA, TMP0 + | ins_next2 + | + |6: // Fill up results with nil. + | daddu TMP1, RA, RD + | daddiu RD, RD, 8 + | b <5 + |. sd TISNIL, -8(TMP1) + | + |.macro math_extern, func + | .ffunc_n math_ .. func + | load_got func + | call_extern + |. nop + | b ->fff_resn + |. nop + |.endmacro + | + |.macro math_extern2, func + | .ffunc_nn math_ .. func + |. load_got func + | call_extern + |. nop + | b ->fff_resn + |. nop + |.endmacro + | + |// TODO: Return integer type if result is integer (own sf implementation). + |.macro math_round, func + |->ff_math_ .. func: + | ld CARG1, 0(BASE) + | beqz NARGS8:RC, ->fff_fallback + |. gettp TMP0, CARG1 + | beq TMP0, TISNUM, ->fff_restv + |. sltu AT, TMP0, TISNUM + | beqz AT, ->fff_fallback + |.if FPU + |. ldc1 FARG1, 0(BASE) + | bal ->vm_ .. func + |. nop + |.else + |. load_got func + | call_extern + |. nop + |.endif + | b ->fff_resn + |. nop + |.endmacro + | + | math_round floor + | math_round ceil + | + |.ffunc math_log + | li AT, 8 + | bne NARGS8:RC, AT, ->fff_fallback // Exactly 1 argument. + |. ld CARG1, 0(BASE) + | checknum CARG1, ->fff_fallback + |. load_got log + |.if FPU + | call_extern + |. ldc1 FARG1, 0(BASE) + |.else + | call_extern + |. nop + |.endif + | b ->fff_resn + |. nop + | + | 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 + | + |.if FPU + |.ffunc_n math_sqrt + |. sqrt.d FRET1, FARG1 + |// fallthrough to ->fff_resn + |.else + | math_extern sqrt + |.endif + | + |->fff_resn: + | ld PC, FRAME_PC(BASE) + | daddiu RA, BASE, -16 + | b ->fff_res1 + |.if FPU + |. sdc1 FRET1, 0(RA) + |.else + |. sd CRET1, 0(RA) + |.endif + | + | + |.ffunc_2 math_ldexp + | checknum CARG1, ->fff_fallback + | checkint CARG2, ->fff_fallback + |. load_got ldexp + | .FPU ldc1 FARG1, 0(BASE) + | call_extern + |. lw CARG2, 8+LO(BASE) + | b ->fff_resn + |. nop + | + |.ffunc_n math_frexp + | load_got frexp + | ld PC, FRAME_PC(BASE) + | call_extern + |. daddiu CARG2, DISPATCH, DISPATCH_GL(tmptv) + | lw TMP1, DISPATCH_GL(tmptv)(DISPATCH) + | daddiu RA, BASE, -16 + |.if FPU + | mtc1 TMP1, FARG2 + | sdc1 FRET1, 0(RA) + | cvt.d.w FARG2, FARG2 + | sdc1 FARG2, 8(RA) + |.else + | sd CRET1, 0(RA) + | zextw TMP1, TMP1 + | settp TMP1, TISNUM + | sd TMP1, 8(RA) + |.endif + | b ->fff_res + |. li RD, (2+1)*8 + | + |.ffunc_n math_modf + | load_got modf + | ld PC, FRAME_PC(BASE) + | call_extern + |. daddiu CARG2, BASE, -16 + | daddiu RA, BASE, -16 + |.if FPU + | sdc1 FRET1, -8(BASE) + |.else + | sd CRET1, -8(BASE) + |.endif + | b ->fff_res + |. li RD, (2+1)*8 + | + |.macro math_minmax, name, intins, fpins + | .ffunc_1 name + | daddu TMP3, BASE, NARGS8:RC + | checkint CARG1, >5 + |. daddiu TMP2, BASE, 8 + |1: // Handle integers. + | beq TMP2, TMP3, ->fff_restv + |. ld CARG2, 0(TMP2) + | checkint CARG2, >3 + |. sextw CARG1, CARG1 + | lw CARG2, LO(TMP2) + |. slt AT, CARG1, CARG2 + | intins CARG1, CARG2, AT + | daddiu TMP2, TMP2, 8 + | zextw CARG1, CARG1 + | b <1 + |. settp CARG1, TISNUM + | + |3: // Convert intermediate result to number and continue with number loop. + | checknum CARG2, ->fff_fallback + |.if FPU + |. mtc1 CARG1, FRET1 + | cvt.d.w FRET1, FRET1 + | b >7 + |. ldc1 FARG1, 0(TMP2) + |.else + |. nop + | bal ->vm_sfi2d_1 + |. nop + | b >7 + |. nop + |.endif + | + |5: + | .FPU ldc1 FRET1, 0(BASE) + | checknum CARG1, ->fff_fallback + |6: // Handle numbers. + |. ld CARG2, 0(TMP2) + | beq TMP2, TMP3, ->fff_resn + |.if FPU + | ldc1 FARG1, 0(TMP2) + |.else + | move CRET1, CARG1 + |.endif + | checknum CARG2, >8 + |. nop + |7: + |.if FPU + | c.olt.d FRET1, FARG1 + | fpins FRET1, FARG1 + |.else + | bal ->vm_sfcmpolt + |. nop + | intins CARG1, CARG2, CRET1 + |.endif + | b <6 + |. daddiu TMP2, TMP2, 8 + | + |8: // Convert integer to number and continue with number loop. + | checkint CARG2, ->fff_fallback + |.if FPU + |. lwc1 FARG1, LO(TMP2) + | b <7 + |. cvt.d.w FARG1, FARG1 + |.else + |. lw CARG2, LO(TMP2) + | bal ->vm_sfi2d_2 + |. nop + | b <7 + |. nop + |.endif + | + |.endmacro + | + | math_minmax math_min, movz, movf.d + | math_minmax math_max, movn, movt.d + | + |//-- String library ----------------------------------------------------- + | + |.ffunc string_byte // Only handle the 1-arg case here. + | ld CARG1, 0(BASE) + | gettp TMP0, CARG1 + | xori AT, NARGS8:RC, 8 + | daddiu TMP0, TMP0, -LJ_TSTR + | or AT, AT, TMP0 + | bnez AT, ->fff_fallback // Need exactly 1 string argument. + |. cleartp STR:CARG1 + | lw TMP0, STR:CARG1->len + | daddiu RA, BASE, -16 + | ld PC, FRAME_PC(BASE) + | sltu RD, r0, TMP0 + | lbu TMP1, STR:CARG1[1] // Access is always ok (NUL at end). + | addiu RD, RD, 1 + | sll RD, RD, 3 // RD = ((str->len != 0)+1)*8 + | settp TMP1, TISNUM + | b ->fff_res + |. sd TMP1, 0(RA) + | + |.ffunc string_char // Only handle the 1-arg case here. + | ffgccheck + |. nop + | ld CARG1, 0(BASE) + | gettp TMP0, CARG1 + | xori AT, NARGS8:RC, 8 // Exactly 1 argument. + | daddiu TMP0, TMP0, -LJ_TISNUM // Integer. + | li TMP1, 255 + | sextw CARG1, CARG1 + | or AT, AT, TMP0 + | sltu TMP1, TMP1, CARG1 // !(255 < n). + | or AT, AT, TMP1 + | bnez AT, ->fff_fallback + |. li CARG3, 1 + | daddiu CARG2, sp, TMPD_OFS + | sb CARG1, TMPD + |->fff_newstr: + | load_got lj_str_new + | sd BASE, L->base + | sd PC, SAVE_PC + | call_intern lj_str_new // (lua_State *L, char *str, size_t l) + |. move CARG1, L + | // Returns GCstr *. + | ld BASE, L->base + |->fff_resstr: + | li AT, LJ_TSTR + | settp CRET1, AT + | b ->fff_restv + |. move CARG1, CRET1 + | + |.ffunc string_sub + | ffgccheck + |. nop + | addiu AT, NARGS8:RC, -16 + | ld TMP0, 0(BASE) + | bltz AT, ->fff_fallback + |. gettp TMP3, TMP0 + | cleartp STR:CARG1, TMP0 + | ld CARG2, 8(BASE) + | beqz AT, >1 + |. li CARG4, -1 + | ld CARG3, 16(BASE) + | checkint CARG3, ->fff_fallback + |. sextw CARG4, CARG3 + |1: + | checkint CARG2, ->fff_fallback + |. li AT, LJ_TSTR + | bne TMP3, AT, ->fff_fallback + |. sextw CARG3, CARG2 + | lw CARG2, STR:CARG1->len + | // STR:CARG1 = str, CARG2 = str->len, CARG3 = start, CARG4 = end + | slt AT, CARG4, r0 + | addiu TMP0, CARG2, 1 + | addu TMP1, CARG4, TMP0 + | slt TMP3, CARG3, r0 + | movn CARG4, TMP1, AT // if (end < 0) end += len+1 + | addu TMP1, CARG3, TMP0 + | movn CARG3, TMP1, TMP3 // if (start < 0) start += len+1 + | li TMP2, 1 + | slt AT, CARG4, r0 + | slt TMP3, r0, CARG3 + | movn CARG4, r0, AT // if (end < 0) end = 0 + | movz CARG3, TMP2, TMP3 // if (start < 1) start = 1 + | slt AT, CARG2, CARG4 + | movn CARG4, CARG2, AT // if (end > len) end = len + | daddu CARG2, STR:CARG1, CARG3 + | subu CARG3, CARG4, CARG3 // len = end - start + | daddiu CARG2, CARG2, sizeof(GCstr)-1 + | bgez CARG3, ->fff_newstr + |. addiu CARG3, CARG3, 1 // len++ + |->fff_emptystr: // Return empty string. + | li AT, LJ_TSTR + | daddiu STR:CARG1, DISPATCH, DISPATCH_GL(strempty) + | b ->fff_restv + |. settp CARG1, AT + | + |.macro ffstring_op, name + | .ffunc string_ .. name + | ffgccheck + |. nop + | beqz NARGS8:RC, ->fff_fallback + |. ld CARG2, 0(BASE) + | checkstr STR:CARG2, ->fff_fallback + | daddiu SBUF:CARG1, DISPATCH, DISPATCH_GL(tmpbuf) + | load_got lj_buf_putstr_ .. name + | ld TMP0, SBUF:CARG1->b + | sd L, SBUF:CARG1->L + | sd BASE, L->base + | sd TMP0, SBUF:CARG1->p + | call_intern extern lj_buf_putstr_ .. name + |. sd PC, SAVE_PC + | load_got lj_buf_tostr + | call_intern lj_buf_tostr + |. move SBUF:CARG1, SBUF:CRET1 + | b ->fff_resstr + |. ld BASE, L->base + |.endmacro + | + |ffstring_op reverse + |ffstring_op lower + |ffstring_op upper + | + |//-- Bit library -------------------------------------------------------- + | + |->vm_tobit_fb: + | beqz TMP1, ->fff_fallback + |.if FPU + |. ldc1 FARG1, 0(BASE) + | add.d FARG1, FARG1, TOBIT + | mfc1 CRET1, FARG1 + | jr ra + |. zextw CRET1, CRET1 + |.else + |// FP number to bit conversion for soft-float. + |->vm_tobit: + | dsll TMP0, CARG1, 1 + | li CARG3, 1076 + | dsrl AT, TMP0, 53 + | dsubu CARG3, CARG3, AT + | sltiu AT, CARG3, 54 + | beqz AT, >1 + |. dextm TMP0, TMP0, 0, 20 + | dinsu TMP0, AT, 21, 21 + | slt AT, CARG1, r0 + | dsrlv CRET1, TMP0, CARG3 + | dsubu TMP0, r0, CRET1 + | movn CRET1, TMP0, AT + | jr ra + |. zextw CRET1, CRET1 + |1: + | jr ra + |. move CRET1, r0 + |.endif + | + |.macro .ffunc_bit, name + | .ffunc_1 bit_..name + | gettp TMP0, CARG1 + | beq TMP0, TISNUM, >6 + |. zextw CRET1, CARG1 + | bal ->vm_tobit_fb + |. sltiu TMP1, TMP0, LJ_TISNUM + |6: + |.endmacro + | + |.macro .ffunc_bit_op, name, bins + | .ffunc_bit name + | daddiu TMP2, BASE, 8 + | daddu TMP3, BASE, NARGS8:RC + |1: + | beq TMP2, TMP3, ->fff_resi + |. ld CARG1, 0(TMP2) + | gettp TMP0, CARG1 + |.if FPU + | bne TMP0, TISNUM, >2 + |. daddiu TMP2, TMP2, 8 + | zextw CARG1, CARG1 + | b <1 + |. bins CRET1, CRET1, CARG1 + |2: + | ldc1 FARG1, -8(TMP2) + | sltiu AT, TMP0, LJ_TISNUM + | beqz AT, ->fff_fallback + |. add.d FARG1, FARG1, TOBIT + | mfc1 CARG1, FARG1 + | zextw CARG1, CARG1 + | b <1 + |. bins CRET1, CRET1, CARG1 + |.else + | beq TMP0, TISNUM, >2 + |. move CRET2, CRET1 + | bal ->vm_tobit_fb + |. sltiu TMP1, TMP0, LJ_TISNUM + | move CARG1, CRET2 + |2: + | zextw CARG1, CARG1 + | bins CRET1, CRET1, CARG1 + | b <1 + |. daddiu TMP2, TMP2, 8 + |.endif + |.endmacro + | + |.ffunc_bit_op band, and + |.ffunc_bit_op bor, or + |.ffunc_bit_op bxor, xor + | + |.ffunc_bit bswap + | dsrl TMP0, CRET1, 8 + | dsrl TMP1, CRET1, 24 + | andi TMP2, TMP0, 0xff00 + | dins TMP1, CRET1, 24, 31 + | dins TMP2, TMP0, 16, 23 + | b ->fff_resi + |. or CRET1, TMP1, TMP2 + | + |.ffunc_bit bnot + | not CRET1, CRET1 + | b ->fff_resi + |. zextw CRET1, CRET1 + | + |.macro .ffunc_bit_sh, name, shins, shmod + | .ffunc_2 bit_..name + | gettp TMP0, CARG1 + | beq TMP0, TISNUM, >1 + |. nop + | bal ->vm_tobit_fb + |. sltiu TMP1, TMP0, LJ_TISNUM + | move CARG1, CRET1 + |1: + | gettp TMP0, CARG2 + | bne TMP0, TISNUM, ->fff_fallback + |. zextw CARG2, CARG2 + | sextw CARG1, CARG1 + |.if shmod == 1 + | negu CARG2, CARG2 + |.endif + | shins CRET1, CARG1, CARG2 + | b ->fff_resi + |. zextw CRET1, CRET1 + |.endmacro + | + |.ffunc_bit_sh lshift, sllv, 0 + |.ffunc_bit_sh rshift, srlv, 0 + |.ffunc_bit_sh arshift, srav, 0 + |.ffunc_bit_sh rol, rotrv, 1 + |.ffunc_bit_sh ror, rotrv, 0 + | + |.ffunc_bit tobit + |->fff_resi: + | ld PC, FRAME_PC(BASE) + | daddiu RA, BASE, -16 + | settp CRET1, TISNUM + | b ->fff_res1 + |. sd CRET1, -16(BASE) + | + |//----------------------------------------------------------------------- + |->fff_fallback: // Call fast function fallback handler. + | // BASE = new base, RB = CFUNC, RC = nargs*8 + | ld TMP3, CFUNC:RB->f + | daddu TMP1, BASE, NARGS8:RC + | ld PC, FRAME_PC(BASE) // Fallback may overwrite PC. + | daddiu TMP0, TMP1, 8*LUA_MINSTACK + | ld TMP2, L->maxstack + | sd PC, SAVE_PC // Redundant (but a defined value). + | sltu AT, TMP2, TMP0 + | sd BASE, L->base + | sd TMP1, L->top + | bnez AT, >5 // Need to grow stack. + |. move CFUNCADDR, TMP3 + | jalr TMP3 // (lua_State *L) + |. move CARG1, L + | // Either throws an error, or recovers and returns -1, 0 or nresults+1. + | ld BASE, L->base + | sll RD, CRET1, 3 + | bgtz CRET1, ->fff_res // Returned nresults+1? + |. daddiu RA, BASE, -16 + |1: // Returned 0 or -1: retry fast path. + | ld LFUNC:RB, FRAME_FUNC(BASE) + | ld TMP0, L->top + | cleartp LFUNC:RB + | bnez CRET1, ->vm_call_tail // Returned -1? + |. dsubu NARGS8:RC, TMP0, BASE + | ins_callt // Returned 0: retry fast path. + | + |// Reconstruct previous base for vmeta_call during tailcall. + |->vm_call_tail: + | andi TMP0, PC, FRAME_TYPE + | li AT, -4 + | bnez TMP0, >3 + |. and TMP1, PC, AT + | lbu TMP1, OFS_RA(PC) + | sll TMP1, TMP1, 3 + | addiu TMP1, TMP1, 16 + |3: + | b ->vm_call_dispatch // Resolve again for tailcall. + |. dsubu TMP2, BASE, TMP1 + | + |5: // Grow stack for fallback handler. + | load_got lj_state_growstack + | li CARG2, LUA_MINSTACK + | call_intern lj_state_growstack // (lua_State *L, int n) + |. move CARG1, L + | ld BASE, L->base + | b <1 + |. li CRET1, 0 // Force retry. + | + |->fff_gcstep: // Call GC step function. + | // BASE = new base, RC = nargs*8 + | move MULTRES, ra + | load_got lj_gc_step + | sd BASE, L->base + | daddu TMP0, BASE, NARGS8:RC + | sd PC, SAVE_PC // Redundant (but a defined value). + | sd TMP0, L->top + | call_intern lj_gc_step // (lua_State *L) + |. move CARG1, L + | ld BASE, L->base + | move ra, MULTRES + | ld TMP0, L->top + | ld CFUNC:RB, FRAME_FUNC(BASE) + | cleartp CFUNC:RB + | jr ra + |. dsubu NARGS8:RC, TMP0, BASE + | + |//----------------------------------------------------------------------- + |//-- Special dispatch targets ------------------------------------------- + |//----------------------------------------------------------------------- + | + |->vm_record: // Dispatch target for recording phase. + |.if JIT + | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | andi AT, TMP3, HOOK_VMEVENT // No recording while in vmevent. + | bnez AT, >5 + | // Decrement the hookcount for consistency, but always do the call. + |. lw TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | andi AT, TMP3, HOOK_ACTIVE + | bnez AT, >1 + |. addiu TMP2, TMP2, -1 + | andi AT, TMP3, LUA_MASKLINE|LUA_MASKCOUNT + | beqz AT, >1 + |. nop + | b >1 + |. sw TMP2, DISPATCH_GL(hookcount)(DISPATCH) + |.endif + | + |->vm_rethook: // Dispatch target for return hooks. + | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | andi AT, TMP3, HOOK_ACTIVE // Hook already active? + | beqz AT, >1 + |5: // Re-dispatch to static ins. + |. ld AT, GG_DISP2STATIC(TMP0) // Assumes TMP0 holds DISPATCH+OP*4. + | jr AT + |. nop + | + |->vm_inshook: // Dispatch target for instr/line hooks. + | lbu TMP3, DISPATCH_GL(hookmask)(DISPATCH) + | lw TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | andi AT, TMP3, HOOK_ACTIVE // Hook already active? + | bnez AT, <5 + |. andi AT, TMP3, LUA_MASKLINE|LUA_MASKCOUNT + | beqz AT, <5 + |. addiu TMP2, TMP2, -1 + | beqz TMP2, >1 + |. sw TMP2, DISPATCH_GL(hookcount)(DISPATCH) + | andi AT, TMP3, LUA_MASKLINE + | beqz AT, <5 + |1: + |. load_got lj_dispatch_ins + | sw MULTRES, SAVE_MULTRES + | move CARG2, PC + | sd BASE, L->base + | // SAVE_PC must hold the _previous_ PC. The callee updates it with PC. + | call_intern lj_dispatch_ins // (lua_State *L, const BCIns *pc) + |. move CARG1, L + |3: + | ld BASE, L->base + |4: // Re-dispatch to static ins. + | lw INS, -4(PC) + | decode_OP8a TMP1, INS + | decode_OP8b TMP1 + | daddu TMP0, DISPATCH, TMP1 + | decode_RD8a RD, INS + | ld AT, GG_DISP2STATIC(TMP0) + | decode_RA8a RA, INS + | decode_RD8b RD + | jr AT + | decode_RA8b RA + | + |->cont_hook: // Continue from hook yield. + | daddiu PC, PC, 4 + | b <4 + |. lw MULTRES, -24+LO(RB) // Restore MULTRES for *M ins. + | + |->vm_hotloop: // Hot loop counter underflow. + |.if JIT + | ld LFUNC:TMP1, FRAME_FUNC(BASE) + | daddiu CARG1, DISPATCH, GG_DISP2J + | cleartp LFUNC:TMP1 + | sd PC, SAVE_PC + | ld TMP1, LFUNC:TMP1->pc + | move CARG2, PC + | sd L, DISPATCH_J(L)(DISPATCH) + | lbu TMP1, PC2PROTO(framesize)(TMP1) + | load_got lj_trace_hot + | sd BASE, L->base + | dsll TMP1, TMP1, 3 + | daddu TMP1, BASE, TMP1 + | call_intern lj_trace_hot // (jit_State *J, const BCIns *pc) + |. sd TMP1, L->top + | b <3 + |. nop + |.endif + | + | + |->vm_callhook: // Dispatch target for call hooks. + |.if JIT + | b >1 + |.endif + |. move CARG2, PC + | + |->vm_hotcall: // Hot call counter underflow. + |.if JIT + | ori CARG2, PC, 1 + |1: + |.endif + | load_got lj_dispatch_call + | daddu TMP0, BASE, RC + | sd PC, SAVE_PC + | sd BASE, L->base + | dsubu RA, RA, BASE + | sd TMP0, L->top + | call_intern lj_dispatch_call // (lua_State *L, const BCIns *pc) + |. move CARG1, L + | // Returns ASMFunction. + | ld BASE, L->base + | ld TMP0, L->top + | sd r0, SAVE_PC // Invalidate for subsequent line hook. + | dsubu NARGS8:RC, TMP0, BASE + | daddu RA, BASE, RA + | ld LFUNC:RB, FRAME_FUNC(BASE) + | cleartp LFUNC:RB + | jr CRET1 + |. lw INS, -4(PC) + | + |->cont_stitch: // Trace stitching. + |.if JIT + | // RA = resultptr, RB = meta base + | lw INS, -4(PC) + | ld TRACE:TMP2, -40(RB) // Save previous trace. + | decode_RA8a RC, INS + | daddiu AT, MULTRES, -8 + | cleartp TRACE:TMP2 + | decode_RA8b RC + | beqz AT, >2 + |. daddu RC, BASE, RC // Call base. + |1: // Move results down. + | ld CARG1, 0(RA) + | daddiu AT, AT, -8 + | daddiu RA, RA, 8 + | sd CARG1, 0(RC) + | bnez AT, <1 + |. daddiu RC, RC, 8 + |2: + | decode_RA8a RA, INS + | decode_RB8a RB, INS + | decode_RA8b RA + | decode_RB8b RB + | daddu RA, RA, RB + | daddu RA, BASE, RA + |3: + | sltu AT, RC, RA + | bnez AT, >9 // More results wanted? + |. nop + | + | lhu TMP3, TRACE:TMP2->traceno + | lhu RD, TRACE:TMP2->link + | beq RD, TMP3, ->cont_nop // Blacklisted. + |. load_got lj_dispatch_stitch + | bnez RD, =>BC_JLOOP // Jump to stitched trace. + |. sll RD, RD, 3 + | + | // Stitch a new trace to the previous trace. + | sw TMP3, DISPATCH_J(exitno)(DISPATCH) + | sd L, DISPATCH_J(L)(DISPATCH) + | sd BASE, L->base + | daddiu CARG1, DISPATCH, GG_DISP2J + | call_intern lj_dispatch_stitch // (jit_State *J, const BCIns *pc) + |. move CARG2, PC + | b ->cont_nop + |. ld BASE, L->base + | + |9: + | sd TISNIL, 0(RC) + | b <3 + |. daddiu RC, RC, 8 + |.endif + | + |->vm_profhook: // Dispatch target for profiler hook. +#if LJ_HASPROFILE + | load_got lj_dispatch_profile + | sw MULTRES, SAVE_MULTRES + | move CARG2, PC + | sd BASE, L->base + | call_intern lj_dispatch_profile // (lua_State *L, const BCIns *pc) + |. move CARG1, L + | // HOOK_PROFILE is off again, so re-dispatch to dynamic instruction. + | daddiu PC, PC, -4 + | b ->cont_nop + |. ld BASE, L->base +#endif + | + |//----------------------------------------------------------------------- + |//-- Trace exit handler ------------------------------------------------- + |//----------------------------------------------------------------------- + | + |.macro savex_, a, b + |.if FPU + | sdc1 f..a, a*8(sp) + | sdc1 f..b, b*8(sp) + | sd r..a, 32*8+a*8(sp) + | sd r..b, 32*8+b*8(sp) + |.else + | sd r..a, a*8(sp) + | sd r..b, b*8(sp) + |.endif + |.endmacro + | + |->vm_exit_handler: + |.if JIT + |.if FPU + | daddiu sp, sp, -(32*8+32*8) + |.else + | daddiu sp, sp, -(32*8) + |.endif + | savex_ 0, 1 + | savex_ 2, 3 + | savex_ 4, 5 + | savex_ 6, 7 + | savex_ 8, 9 + | savex_ 10, 11 + | savex_ 12, 13 + | savex_ 14, 15 + | savex_ 16, 17 + | savex_ 18, 19 + | savex_ 20, 21 + | savex_ 22, 23 + | savex_ 24, 25 + | savex_ 26, 27 + | savex_ 28, 30 + |.if FPU + | sdc1 f29, 29*8(sp) + | sdc1 f31, 31*8(sp) + | sd r0, 32*8+31*8(sp) // Clear RID_TMP. + | daddiu TMP2, sp, 32*8+32*8 // Recompute original value of sp. + | sd TMP2, 32*8+29*8(sp) // Store sp in RID_SP + |.else + | sd r0, 31*8(sp) // Clear RID_TMP. + | daddiu TMP2, sp, 32*8 // Recompute original value of sp. + | sd TMP2, 29*8(sp) // Store sp in RID_SP + |.endif + | li_vmstate EXIT + | daddiu DISPATCH, JGL, -GG_DISP2G-32768 + | lw TMP1, 0(TMP2) // Load exit number. + | st_vmstate + | ld L, DISPATCH_GL(cur_L)(DISPATCH) + | ld BASE, DISPATCH_GL(jit_base)(DISPATCH) + | load_got lj_trace_exit + | sd L, DISPATCH_J(L)(DISPATCH) + | sw ra, DISPATCH_J(parent)(DISPATCH) // Store trace number. + | sd BASE, L->base + | sw TMP1, DISPATCH_J(exitno)(DISPATCH) // Store exit number. + | daddiu CARG1, DISPATCH, GG_DISP2J + | sd r0, DISPATCH_GL(jit_base)(DISPATCH) + | call_intern lj_trace_exit // (jit_State *J, ExitState *ex) + |. move CARG2, sp + | // Returns MULTRES (unscaled) or negated error code. + | ld TMP1, L->cframe + | li AT, -4 + | ld BASE, L->base + | and sp, TMP1, AT + | ld PC, SAVE_PC // Get SAVE_PC. + | b >1 + |. sd L, SAVE_L // Set SAVE_L (on-trace resume/yield). + |.endif + |->vm_exit_interp: + |.if JIT + | // CRET1 = MULTRES or negated error code, BASE, PC and JGL set. + | ld L, SAVE_L + | daddiu DISPATCH, JGL, -GG_DISP2G-32768 + | sd BASE, L->base + |1: + | bltz CRET1, >9 // Check for error from exit. + |. ld LFUNC:RB, FRAME_FUNC(BASE) + | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | dsll MULTRES, CRET1, 3 + | cleartp LFUNC:RB + | sw MULTRES, SAVE_MULTRES + | li TISNIL, LJ_TNIL + | li TISNUM, LJ_TISNUM // Setup type comparison constants. + | .FPU mtc1 TMP3, TOBIT + | ld TMP1, LFUNC:RB->pc + | sd r0, DISPATCH_GL(jit_base)(DISPATCH) + | ld KBASE, PC2PROTO(k)(TMP1) + | .FPU cvt.d.s TOBIT, TOBIT + | // Modified copy of ins_next which handles function header dispatch, too. + | lw INS, 0(PC) + | daddiu PC, PC, 4 + | // Assumes TISNIL == ~LJ_VMST_INTERP == -1 + | sw TISNIL, DISPATCH_GL(vmstate)(DISPATCH) + | decode_OP8a TMP1, INS + | decode_OP8b TMP1 + | sltiu TMP2, TMP1, BC_FUNCF*8 + | daddu TMP0, DISPATCH, TMP1 + | decode_RD8a RD, INS + | ld AT, 0(TMP0) + | decode_RA8a RA, INS + | beqz TMP2, >2 + |. decode_RA8b RA + | jr AT + |. decode_RD8b RD + |2: + | sltiu TMP2, TMP1, (BC_FUNCC+2)*8 // Fast function? + | bnez TMP2, >3 + |. ld TMP1, FRAME_PC(BASE) + | // Check frame below fast function. + | andi TMP0, TMP1, FRAME_TYPE + | bnez TMP0, >3 // Trace stitching continuation? + |. nop + | // Otherwise set KBASE for Lua function below fast function. + | lw TMP2, -4(TMP1) + | decode_RA8a TMP0, TMP2 + | decode_RA8b TMP0 + | dsubu TMP1, BASE, TMP0 + | ld LFUNC:TMP2, -32(TMP1) + | cleartp LFUNC:TMP2 + | ld TMP1, LFUNC:TMP2->pc + | ld KBASE, PC2PROTO(k)(TMP1) + |3: + | daddiu RC, MULTRES, -8 + | jr AT + |. daddu RA, RA, BASE + | + |9: // Rethrow error from the right C frame. + | load_got lj_err_throw + | negu CARG2, CRET1 + | call_intern lj_err_throw // (lua_State *L, int errcode) + |. move CARG1, L + |.endif + | + |//----------------------------------------------------------------------- + |//-- Math helper functions ---------------------------------------------- + |//----------------------------------------------------------------------- + | + |// Hard-float round to integer. + |// Modifies AT, TMP0, FRET1, FRET2, f4. Keeps all others incl. FARG1. + |.macro vm_round_hf, func + | lui TMP0, 0x4330 // Hiword of 2^52 (double). + | dsll TMP0, TMP0, 32 + | dmtc1 TMP0, f4 + | abs.d FRET2, FARG1 // |x| + | dmfc1 AT, FARG1 + | c.olt.d 0, FRET2, f4 + | add.d FRET1, FRET2, f4 // (|x| + 2^52) - 2^52 + | bc1f 0, >1 // Truncate only if |x| < 2^52. + |. sub.d FRET1, FRET1, f4 + | slt AT, AT, r0 + |.if "func" == "ceil" + | lui TMP0, 0xbff0 // Hiword of -1 (double). Preserves -0. + |.else + | lui TMP0, 0x3ff0 // Hiword of +1 (double). + |.endif + |.if "func" == "trunc" + | dsll TMP0, TMP0, 32 + | dmtc1 TMP0, f4 + | c.olt.d 0, FRET2, FRET1 // |x| < result? + | sub.d FRET2, FRET1, f4 + | movt.d FRET1, FRET2, 0 // If yes, subtract +1. + | neg.d FRET2, FRET1 + | jr ra + |. movn.d FRET1, FRET2, AT // Merge sign bit back in. + |.else + | neg.d FRET2, FRET1 + | dsll TMP0, TMP0, 32 + | dmtc1 TMP0, f4 + | movn.d FRET1, FRET2, AT // Merge sign bit back in. + |.if "func" == "ceil" + | c.olt.d 0, FRET1, FARG1 // x > result? + |.else + | c.olt.d 0, FARG1, FRET1 // x < result? + |.endif + | sub.d FRET2, FRET1, f4 // If yes, subtract +-1. + | jr ra + |. movt.d FRET1, FRET2, 0 + |.endif + |1: + | jr ra + |. mov.d FRET1, FARG1 + |.endmacro + | + |.macro vm_round, func + |.if FPU + | vm_round_hf, func + |.endif + |.endmacro + | + |->vm_floor: + | vm_round floor + |->vm_ceil: + | vm_round ceil + |->vm_trunc: + |.if JIT + | vm_round trunc + |.endif + | + |// Soft-float integer to number conversion. + |.macro sfi2d, ARG + |.if not FPU + | beqz ARG, >9 // Handle zero first. + |. sra TMP0, ARG, 31 + | xor TMP1, ARG, TMP0 + | dsubu TMP1, TMP1, TMP0 // Absolute value in TMP1. + | dclz ARG, TMP1 + | addiu ARG, ARG, -11 + | li AT, 0x3ff+63-11-1 + | dsllv TMP1, TMP1, ARG // Align mantissa left with leading 1. + | subu ARG, AT, ARG // Exponent - 1. + | ins ARG, TMP0, 11, 11 // Sign | Exponent. + | dsll ARG, ARG, 52 // Align left. + | jr ra + |. daddu ARG, ARG, TMP1 // Add mantissa, increment exponent. + |9: + | jr ra + |. nop + |.endif + |.endmacro + | + |// Input CARG1. Output: CARG1. Temporaries: AT, TMP0, TMP1. + |->vm_sfi2d_1: + | sfi2d CARG1 + | + |// Input CARG2. Output: CARG2. Temporaries: AT, TMP0, TMP1. + |->vm_sfi2d_2: + | sfi2d CARG2 + | + |// Soft-float comparison. Equivalent to c.eq.d. + |// Input: CARG*. Output: CRET1. Temporaries: AT, TMP0, TMP1. + |->vm_sfcmpeq: + |.if not FPU + | dsll AT, CARG1, 1 + | dsll TMP0, CARG2, 1 + | or TMP1, AT, TMP0 + | beqz TMP1, >8 // Both args +-0: return 1. + |. lui TMP1, 0xffe0 + | dsll TMP1, TMP1, 32 + | sltu AT, TMP1, AT + | sltu TMP0, TMP1, TMP0 + | or TMP1, AT, TMP0 + | bnez TMP1, >9 // Either arg is NaN: return 0; + |. xor AT, CARG1, CARG2 + | jr ra + |. sltiu CRET1, AT, 1 // Same values: return 1. + |8: + | jr ra + |. li CRET1, 1 + |9: + | jr ra + |. li CRET1, 0 + |.endif + | + |// Soft-float comparison. Equivalent to c.ult.d and c.olt.d. + |// Input: CARG1, CARG2. Output: CRET1. Temporaries: AT, TMP0, TMP1, CRET2. + |->vm_sfcmpult: + |.if not FPU + | b >1 + |. li CRET2, 1 + |.endif + | + |->vm_sfcmpolt: + |.if not FPU + | li CRET2, 0 + |1: + | dsll AT, CARG1, 1 + | dsll TMP0, CARG2, 1 + | or TMP1, AT, TMP0 + | beqz TMP1, >8 // Both args +-0: return 0. + |. lui TMP1, 0xffe0 + | dsll TMP1, TMP1, 32 + | sltu AT, TMP1, AT + | sltu TMP0, TMP1, TMP0 + | or TMP1, AT, TMP0 + | bnez TMP1, >9 // Either arg is NaN: return 0 or 1; + |. and AT, CARG1, CARG2 + | bltz AT, >5 // Both args negative? + |. nop + | jr ra + |. slt CRET1, CARG1, CARG2 + |5: // Swap conditions if both operands are negative. + | jr ra + |. slt CRET1, CARG2, CARG1 + |8: + | jr ra + |. nop + |9: + | jr ra + |. move CRET1, CRET2 + |.endif + | + |// Soft-float comparison. Equivalent to c.ole.d a, b or c.ole.d b, a. + |// Input: CARG1, CARG2, TMP3. Output: CRET1. Temporaries: AT, TMP0, TMP1. + |->vm_sfcmpolex: + |.if not FPU + | dsll AT, CARG1, 1 + | dsll TMP0, CARG2, 1 + | or TMP1, AT, TMP0 + | beqz TMP1, >8 // Both args +-0: return 1. + |. lui TMP1, 0xffe0 + | dsll TMP1, TMP1, 32 + | sltu AT, TMP1, AT + | sltu TMP0, TMP1, TMP0 + | or TMP1, AT, TMP0 + | bnez TMP1, >9 // Either arg is NaN: return 0; + |. and AT, CARG1, CARG2 + | xor AT, AT, TMP3 + | bltz AT, >5 // Both args negative? + |. nop + | jr ra + |. slt CRET1, CARG2, CARG1 + |5: // Swap conditions if both operands are negative. + | jr ra + |. slt CRET1, CARG1, CARG2 + |8: + | jr ra + |. li CRET1, 1 + |9: + | jr ra + |. li CRET1, 0 + |.endif + | + |//----------------------------------------------------------------------- + |//-- Miscellaneous functions -------------------------------------------- + |//----------------------------------------------------------------------- + | + |//----------------------------------------------------------------------- + |//-- FFI helper functions ----------------------------------------------- + |//----------------------------------------------------------------------- + | + |// Handler for callback functions. Callback slot number in r1, g in r2. + |->vm_ffi_callback: + |.if FFI + |.type CTSTATE, CTState, PC + | saveregs + | ld CTSTATE, GL:r2->ctype_state + | daddiu DISPATCH, r2, GG_G2DISP + | load_got lj_ccallback_enter + | sw r1, CTSTATE->cb.slot + | sd CARG1, CTSTATE->cb.gpr[0] + | .FPU sdc1 FARG1, CTSTATE->cb.fpr[0] + | sd CARG2, CTSTATE->cb.gpr[1] + | .FPU sdc1 FARG2, CTSTATE->cb.fpr[1] + | sd CARG3, CTSTATE->cb.gpr[2] + | .FPU sdc1 FARG3, CTSTATE->cb.fpr[2] + | sd CARG4, CTSTATE->cb.gpr[3] + | .FPU sdc1 FARG4, CTSTATE->cb.fpr[3] + | sd CARG5, CTSTATE->cb.gpr[4] + | .FPU sdc1 FARG5, CTSTATE->cb.fpr[4] + | sd CARG6, CTSTATE->cb.gpr[5] + | .FPU sdc1 FARG6, CTSTATE->cb.fpr[5] + | sd CARG7, CTSTATE->cb.gpr[6] + | .FPU sdc1 FARG7, CTSTATE->cb.fpr[6] + | sd CARG8, CTSTATE->cb.gpr[7] + | .FPU sdc1 FARG8, CTSTATE->cb.fpr[7] + | daddiu TMP0, sp, CFRAME_SPACE + | sd TMP0, CTSTATE->cb.stack + | sd r0, SAVE_PC // Any value outside of bytecode is ok. + | move CARG2, sp + | call_intern lj_ccallback_enter // (CTState *cts, void *cf) + |. move CARG1, CTSTATE + | // Returns lua_State *. + | ld BASE, L:CRET1->base + | ld RC, L:CRET1->top + | move L, CRET1 + | .FPU lui TMP3, 0x59c0 // TOBIT = 2^52 + 2^51 (float). + | ld LFUNC:RB, FRAME_FUNC(BASE) + | .FPU mtc1 TMP3, TOBIT + | li TISNIL, LJ_TNIL + | li TISNUM, LJ_TISNUM + | li_vmstate INTERP + | subu RC, RC, BASE + | cleartp LFUNC:RB + | st_vmstate + | .FPU cvt.d.s TOBIT, TOBIT + | ins_callt + |.endif + | + |->cont_ffi_callback: // Return from FFI callback. + |.if FFI + | load_got lj_ccallback_leave + | ld CTSTATE, DISPATCH_GL(ctype_state)(DISPATCH) + | sd BASE, L->base + | sd RB, L->top + | sd L, CTSTATE->L + | move CARG2, RA + | call_intern lj_ccallback_leave // (CTState *cts, TValue *o) + |. move CARG1, CTSTATE + | .FPU ldc1 FRET1, CTSTATE->cb.fpr[0] + | ld CRET1, CTSTATE->cb.gpr[0] + | .FPU ldc1 FRET2, CTSTATE->cb.fpr[1] + | b ->vm_leave_unw + |. ld CRET2, CTSTATE->cb.gpr[1] + |.endif + | + |->vm_ffi_call: // Call C function via FFI. + | // Caveat: needs special frame unwinding, see below. + |.if FFI + | .type CCSTATE, CCallState, CARG1 + | lw TMP1, CCSTATE->spadj + | lbu CARG2, CCSTATE->nsp + | move TMP2, sp + | dsubu sp, sp, TMP1 + | sd ra, -8(TMP2) + | sll CARG2, CARG2, 3 + | sd r16, -16(TMP2) + | sd CCSTATE, -24(TMP2) + | move r16, TMP2 + | daddiu TMP1, CCSTATE, offsetof(CCallState, stack) + | move TMP2, sp + | beqz CARG2, >2 + |. daddu TMP3, TMP1, CARG2 + |1: + | ld TMP0, 0(TMP1) + | daddiu TMP1, TMP1, 8 + | sltu AT, TMP1, TMP3 + | sd TMP0, 0(TMP2) + | bnez AT, <1 + |. daddiu TMP2, TMP2, 8 + |2: + | ld CFUNCADDR, CCSTATE->func + | .FPU ldc1 FARG1, CCSTATE->gpr[0] + | ld CARG2, CCSTATE->gpr[1] + | .FPU ldc1 FARG2, CCSTATE->gpr[1] + | ld CARG3, CCSTATE->gpr[2] + | .FPU ldc1 FARG3, CCSTATE->gpr[2] + | ld CARG4, CCSTATE->gpr[3] + | .FPU ldc1 FARG4, CCSTATE->gpr[3] + | ld CARG5, CCSTATE->gpr[4] + | .FPU ldc1 FARG5, CCSTATE->gpr[4] + | ld CARG6, CCSTATE->gpr[5] + | .FPU ldc1 FARG6, CCSTATE->gpr[5] + | ld CARG7, CCSTATE->gpr[6] + | .FPU ldc1 FARG7, CCSTATE->gpr[6] + | ld CARG8, CCSTATE->gpr[7] + | .FPU ldc1 FARG8, CCSTATE->gpr[7] + | jalr CFUNCADDR + |. ld CARG1, CCSTATE->gpr[0] // Do this last, since CCSTATE is CARG1. + | ld CCSTATE:TMP1, -24(r16) + | ld TMP2, -16(r16) + | ld ra, -8(r16) + | sd CRET1, CCSTATE:TMP1->gpr[0] + | sd CRET2, CCSTATE:TMP1->gpr[1] + |.if FPU + | sdc1 FRET1, CCSTATE:TMP1->fpr[0] + | sdc1 FRET2, CCSTATE:TMP1->fpr[1] + |.else + | sd CARG1, CCSTATE:TMP1->gpr[2] // 2nd FP struct field for soft-float. + |.endif + | move sp, r16 + | jr ra + |. move r16, TMP2 + |.endif + |// Note: vm_ffi_call must be the last function in this object file! + | + |//----------------------------------------------------------------------- +} + +/* 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 + |.macro bc_comp, FRA, FRD, ARGRA, ARGRD, movop, fmovop, fcomp, sfcomp + | daddu RA, BASE, RA + | daddu RD, BASE, RD + | ld ARGRA, 0(RA) + | ld ARGRD, 0(RD) + | lhu TMP2, OFS_RD(PC) + | gettp CARG3, ARGRA + | gettp CARG4, ARGRD + | bne CARG3, TISNUM, >2 + |. daddiu PC, PC, 4 + | bne CARG4, TISNUM, >5 + |. decode_RD4b TMP2 + | sextw ARGRA, ARGRA + | sextw ARGRD, ARGRD + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | slt AT, CARG1, CARG2 + | addu TMP2, TMP2, TMP3 + | movop TMP2, r0, AT + |1: + | daddu PC, PC, TMP2 + | ins_next + | + |2: // RA is not an integer. + | sltiu AT, CARG3, LJ_TISNUM + | beqz AT, ->vmeta_comp + |. lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | sltiu AT, CARG4, LJ_TISNUM + | beqz AT, >4 + |. decode_RD4b TMP2 + |.if FPU + | ldc1 FRA, 0(RA) + | ldc1 FRD, 0(RD) + |.endif + |3: // RA and RD are both numbers. + |.if FPU + | fcomp f20, f22 + | addu TMP2, TMP2, TMP3 + | b <1 + |. fmovop TMP2, r0 + |.else + | bal sfcomp + |. addu TMP2, TMP2, TMP3 + | b <1 + |. movop TMP2, r0, CRET1 + |.endif + | + |4: // RA is a number, RD is not a number. + | bne CARG4, TISNUM, ->vmeta_comp + | // RA is a number, RD is an integer. Convert RD to a number. + |.if FPU + |. lwc1 FRD, LO(RD) + | ldc1 FRA, 0(RA) + | b <3 + |. cvt.d.w FRD, FRD + |.else + |.if "ARGRD" == "CARG1" + |. sextw CARG1, CARG1 + | bal ->vm_sfi2d_1 + |. nop + |.else + |. sextw CARG2, CARG2 + | bal ->vm_sfi2d_2 + |. nop + |.endif + | b <3 + |. nop + |.endif + | + |5: // RA is an integer, RD is not an integer + | sltiu AT, CARG4, LJ_TISNUM + | beqz AT, ->vmeta_comp + |. lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | // RA is an integer, RD is a number. Convert RA to a number. + |.if FPU + | lwc1 FRA, LO(RA) + | ldc1 FRD, 0(RD) + | b <3 + | cvt.d.w FRA, FRA + |.else + |.if "ARGRA" == "CARG1" + | bal ->vm_sfi2d_1 + |. sextw CARG1, CARG1 + |.else + | bal ->vm_sfi2d_2 + |. sextw CARG2, CARG2 + |.endif + | b <3 + |. nop + |.endif + |.endmacro + | + if (op == BC_ISLT) { + | bc_comp f20, f22, CARG1, CARG2, movz, movf, c.olt.d, ->vm_sfcmpolt + } else if (op == BC_ISGE) { + | bc_comp f20, f22, CARG1, CARG2, movn, movt, c.olt.d, ->vm_sfcmpolt + } else if (op == BC_ISLE) { + | bc_comp f22, f20, CARG2, CARG1, movn, movt, c.ult.d, ->vm_sfcmpult + } else { + | bc_comp f22, f20, CARG2, CARG1, movz, movf, c.ult.d, ->vm_sfcmpult + } + break; + + case BC_ISEQV: case BC_ISNEV: + vk = op == BC_ISEQV; + | // RA = src1*8, RD = src2*8, JMP with RD = target + | daddu RA, BASE, RA + | daddiu PC, PC, 4 + | daddu RD, BASE, RD + | ld CARG1, 0(RA) + | lhu TMP2, -4+OFS_RD(PC) + | ld CARG2, 0(RD) + | gettp CARG3, CARG1 + | gettp CARG4, CARG2 + | sltu AT, TISNUM, CARG3 + | sltu TMP1, TISNUM, CARG4 + | or AT, AT, TMP1 + if (vk) { + | beqz AT, ->BC_ISEQN_Z + } else { + | beqz AT, ->BC_ISNEN_Z + } + | // Either or both types are not numbers. + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + |.if FFI + |. li AT, LJ_TCDATA + | beq CARG3, AT, ->vmeta_equal_cd + |.endif + | decode_RD4b TMP2 + |.if FFI + | beq CARG4, AT, ->vmeta_equal_cd + |. nop + |.endif + | bne CARG1, CARG2, >2 + |. addu TMP2, TMP2, TMP3 + | // Tag and value are equal. + if (vk) { + |->BC_ISEQV_Z: + | daddu PC, PC, TMP2 + } + |1: + | ins_next + | + |2: // Check if the tags are the same and it's a table or userdata. + | xor AT, CARG3, CARG4 // Same type? + | sltiu TMP0, CARG3, LJ_TISTABUD+1 // Table or userdata? + | movn TMP0, r0, AT + if (vk) { + | beqz TMP0, <1 + } else { + | beqz TMP0, ->BC_ISEQV_Z // Reuse code from opposite instruction. + } + | // Different tables or userdatas. Need to check __eq metamethod. + | // Field metatable must be at same offset for GCtab and GCudata! + |. cleartp TAB:TMP1, CARG1 + | ld TAB:TMP3, TAB:TMP1->metatable + if (vk) { + | beqz TAB:TMP3, <1 // No metatable? + |. nop + | lbu TMP3, TAB:TMP3->nomm + | andi TMP3, TMP3, 1<<MM_eq + | bnez TMP3, >1 // Or 'no __eq' flag set? + } else { + | beqz TAB:TMP3,->BC_ISEQV_Z // No metatable? + |. nop + | lbu TMP3, TAB:TMP3->nomm + | andi TMP3, TMP3, 1<<MM_eq + | bnez TMP3, ->BC_ISEQV_Z // Or 'no __eq' flag set? + } + |. nop + | b ->vmeta_equal // Handle __eq metamethod. + |. li TMP0, 1-vk // ne = 0 or 1. + break; + + case BC_ISEQS: case BC_ISNES: + vk = op == BC_ISEQS; + | // RA = src*8, RD = str_const*8 (~), JMP with RD = target + | daddu RA, BASE, RA + | daddiu PC, PC, 4 + | ld CARG1, 0(RA) + | dsubu RD, KBASE, RD + | lhu TMP2, -4+OFS_RD(PC) + | ld CARG2, -8(RD) // KBASE-8-str_const*8 + |.if FFI + | gettp TMP0, CARG1 + | li AT, LJ_TCDATA + |.endif + | li TMP1, LJ_TSTR + | decode_RD4b TMP2 + |.if FFI + | beq TMP0, AT, ->vmeta_equal_cd + |.endif + |. settp CARG2, TMP1 + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | xor TMP1, CARG1, CARG2 + | addu TMP2, TMP2, TMP3 + if (vk) { + | movn TMP2, r0, TMP1 + } else { + | movz TMP2, r0, TMP1 + } + | daddu PC, PC, TMP2 + | ins_next + break; + + case BC_ISEQN: case BC_ISNEN: + vk = op == BC_ISEQN; + | // RA = src*8, RD = num_const*8, JMP with RD = target + | daddu RA, BASE, RA + | daddu RD, KBASE, RD + | ld CARG1, 0(RA) + | ld CARG2, 0(RD) + | lhu TMP2, OFS_RD(PC) + | gettp CARG3, CARG1 + | gettp CARG4, CARG2 + | daddiu PC, PC, 4 + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + if (vk) { + |->BC_ISEQN_Z: + } else { + |->BC_ISNEN_Z: + } + | bne CARG3, TISNUM, >3 + |. decode_RD4b TMP2 + | bne CARG4, TISNUM, >6 + |. addu TMP2, TMP2, TMP3 + | xor AT, CARG1, CARG2 + if (vk) { + | movn TMP2, r0, AT + |1: + | daddu PC, PC, TMP2 + |2: + } else { + | movz TMP2, r0, AT + |1: + |2: + | daddu PC, PC, TMP2 + } + | ins_next + | + |3: // RA is not an integer. + | sltu AT, CARG3, TISNUM + |.if FFI + | beqz AT, >8 + |.else + | beqz AT, <2 + |.endif + |. addu TMP2, TMP2, TMP3 + | sltu AT, CARG4, TISNUM + |.if FPU + | ldc1 f20, 0(RA) + | ldc1 f22, 0(RD) + |.endif + | beqz AT, >5 + |. nop + |4: // RA and RD are both numbers. + |.if FPU + | c.eq.d f20, f22 + | b <1 + if (vk) { + |. movf TMP2, r0 + } else { + |. movt TMP2, r0 + } + |.else + | bal ->vm_sfcmpeq + |. nop + | b <1 + if (vk) { + |. movz TMP2, r0, CRET1 + } else { + |. movn TMP2, r0, CRET1 + } + |.endif + | + |5: // RA is a number, RD is not a number. + |.if FFI + | bne CARG4, TISNUM, >9 + |.else + | bne CARG4, TISNUM, <2 + |.endif + | // RA is a number, RD is an integer. Convert RD to a number. + |.if FPU + |. lwc1 f22, LO(RD) + | b <4 + |. cvt.d.w f22, f22 + |.else + |. sextw CARG2, CARG2 + | bal ->vm_sfi2d_2 + |. nop + | b <4 + |. nop + |.endif + | + |6: // RA is an integer, RD is not an integer + | sltu AT, CARG4, TISNUM + |.if FFI + | beqz AT, >9 + |.else + | beqz AT, <2 + |.endif + | // RA is an integer, RD is a number. Convert RA to a number. + |.if FPU + |. lwc1 f20, LO(RA) + | ldc1 f22, 0(RD) + | b <4 + | cvt.d.w f20, f20 + |.else + |. sextw CARG1, CARG1 + | bal ->vm_sfi2d_1 + |. nop + | b <4 + |. nop + |.endif + | + |.if FFI + |8: + | li AT, LJ_TCDATA + | bne CARG3, AT, <2 + |. nop + | b ->vmeta_equal_cd + |. nop + |9: + | li AT, LJ_TCDATA + | bne CARG4, AT, <2 + |. nop + | b ->vmeta_equal_cd + |. nop + |.endif + break; + + case BC_ISEQP: case BC_ISNEP: + vk = op == BC_ISEQP; + | // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target + | daddu RA, BASE, RA + | srl TMP1, RD, 3 + | ld TMP0, 0(RA) + | lhu TMP2, OFS_RD(PC) + | not TMP1, TMP1 + | gettp TMP0, TMP0 + | daddiu PC, PC, 4 + |.if FFI + | li AT, LJ_TCDATA + | beq TMP0, AT, ->vmeta_equal_cd + |.endif + |. xor TMP0, TMP0, TMP1 + | decode_RD4b TMP2 + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | addu TMP2, TMP2, TMP3 + if (vk) { + | movn TMP2, r0, TMP0 + } else { + | movz TMP2, r0, TMP0 + } + | daddu 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 + | daddu RD, BASE, RD + | lhu TMP2, OFS_RD(PC) + | ld TMP0, 0(RD) + | daddiu PC, PC, 4 + | gettp TMP0, TMP0 + | sltiu TMP0, TMP0, LJ_TISTRUECOND + if (op == BC_IST || op == BC_ISF) { + | decode_RD4b TMP2 + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | addu TMP2, TMP2, TMP3 + if (op == BC_IST) { + | movz TMP2, r0, TMP0 + } else { + | movn TMP2, r0, TMP0 + } + | daddu PC, PC, TMP2 + } else { + | ld CRET1, 0(RD) + if (op == BC_ISTC) { + | beqz TMP0, >1 + } else { + | bnez TMP0, >1 + } + |. daddu RA, BASE, RA + | decode_RD4b TMP2 + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | addu TMP2, TMP2, TMP3 + | sd CRET1, 0(RA) + | daddu PC, PC, TMP2 + |1: + } + | ins_next + break; + + case BC_ISTYPE: + | // RA = src*8, RD = -type*8 + | daddu TMP2, BASE, RA + | srl TMP1, RD, 3 + | ld TMP0, 0(TMP2) + | ins_next1 + | gettp TMP0, TMP0 + | daddu AT, TMP0, TMP1 + | bnez AT, ->vmeta_istype + |. ins_next2 + break; + case BC_ISNUM: + | // RA = src*8, RD = -(TISNUM-1)*8 + | daddu TMP2, BASE, RA + | ld TMP0, 0(TMP2) + | ins_next1 + | checknum TMP0, ->vmeta_istype + |. ins_next2 + break; + + /* -- Unary ops --------------------------------------------------------- */ + + case BC_MOV: + | // RA = dst*8, RD = src*8 + | daddu RD, BASE, RD + | daddu RA, BASE, RA + | ld CRET1, 0(RD) + | ins_next1 + | sd CRET1, 0(RA) + | ins_next2 + break; + case BC_NOT: + | // RA = dst*8, RD = src*8 + | daddu RD, BASE, RD + | daddu RA, BASE, RA + | ld TMP0, 0(RD) + | li AT, LJ_TTRUE + | gettp TMP0, TMP0 + | sltu TMP0, AT, TMP0 + | addiu TMP0, TMP0, 1 + | dsll TMP0, TMP0, 47 + | not TMP0, TMP0 + | ins_next1 + | sd TMP0, 0(RA) + | ins_next2 + break; + case BC_UNM: + | // RA = dst*8, RD = src*8 + | daddu RB, BASE, RD + | ld CARG1, 0(RB) + | daddu RA, BASE, RA + | gettp CARG3, CARG1 + | bne CARG3, TISNUM, >2 + |. lui TMP1, 0x8000 + | sextw CARG1, CARG1 + | beq CARG1, TMP1, ->vmeta_unm // Meta handler deals with -2^31. + |. negu CARG1, CARG1 + | zextw CARG1, CARG1 + | settp CARG1, TISNUM + |1: + | ins_next1 + | sd CARG1, 0(RA) + | ins_next2 + |2: + | sltiu AT, CARG3, LJ_TISNUM + | beqz AT, ->vmeta_unm + |. dsll TMP1, TMP1, 32 + | b <1 + |. xor CARG1, CARG1, TMP1 + break; + case BC_LEN: + | // RA = dst*8, RD = src*8 + | daddu CARG2, BASE, RD + | daddu RA, BASE, RA + | ld TMP0, 0(CARG2) + | gettp TMP1, TMP0 + | daddiu AT, TMP1, -LJ_TSTR + | bnez AT, >2 + |. cleartp STR:CARG1, TMP0 + | lw CRET1, STR:CARG1->len + |1: + | settp CRET1, TISNUM + | ins_next1 + | sd CRET1, 0(RA) + | ins_next2 + |2: + | daddiu AT, TMP1, -LJ_TTAB + | bnez AT, ->vmeta_len + |. nop +#if LJ_52 + | ld TAB:TMP2, TAB:CARG1->metatable + | bnez TAB:TMP2, >9 + |. nop + |3: +#endif + |->BC_LEN_Z: + | load_got lj_tab_len + | call_intern lj_tab_len // (GCtab *t) + |. nop + | // Returns uint32_t (but less than 2^31). + | b <1 + |. nop +#if LJ_52 + |9: + | lbu TMP0, TAB:TMP2->nomm + | andi TMP0, TMP0, 1<<MM_len + | bnez TMP0, <3 // 'no __len' flag set: done. + |. nop + | b ->vmeta_len + |. nop +#endif + break; + + /* -- Binary ops -------------------------------------------------------- */ + + |.macro fpmod, a, b, c + | bal ->vm_floor // floor(b/c) + |. div.d FARG1, b, c + | mul.d a, FRET1, c + | sub.d a, b, a // b - floor(b/c)*c + |.endmacro + + |.macro sfpmod + | daddiu sp, sp, -16 + | + | load_got __divdf3 + | sd CARG1, 0(sp) + | call_extern + |. sd CARG2, 8(sp) + | + | load_got floor + | call_extern + |. move CARG1, CRET1 + | + | load_got __muldf3 + | move CARG1, CRET1 + | call_extern + |. ld CARG2, 8(sp) + | + | load_got __subdf3 + | ld CARG1, 0(sp) + | call_extern + |. move CARG2, CRET1 + | + | daddiu sp, sp, 16 + |.endmacro + + |.macro ins_arithpre, label + ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN); + | // RA = dst*8, RB = src1*8, RC = src2*8 | num_const*8 + ||switch (vk) { + ||case 0: + | decode_RB8a RB, INS + | decode_RB8b RB + | decode_RDtoRC8 RC, RD + | // RA = dst*8, RB = src1*8, RC = num_const*8 + | daddu RB, BASE, RB + |.if "label" ~= "none" + | b label + |.endif + |. daddu RC, KBASE, RC + || break; + ||case 1: + | decode_RB8a RC, INS + | decode_RB8b RC + | decode_RDtoRC8 RB, RD + | // RA = dst*8, RB = num_const*8, RC = src1*8 + | daddu RC, BASE, RC + |.if "label" ~= "none" + | b label + |.endif + |. daddu RB, KBASE, RB + || break; + ||default: + | decode_RB8a RB, INS + | decode_RB8b RB + | decode_RDtoRC8 RC, RD + | // RA = dst*8, RB = src1*8, RC = src2*8 + | daddu RB, BASE, RB + |.if "label" ~= "none" + | b label + |.endif + |. daddu RC, BASE, RC + || break; + ||} + |.endmacro + | + |.macro ins_arith, intins, fpins, fpcall, label + | ins_arithpre none + | + |.if "label" ~= "none" + |label: + |.endif + | + |// Used in 5. + | ld CARG1, 0(RB) + | ld CARG2, 0(RC) + | gettp TMP0, CARG1 + | gettp TMP1, CARG2 + | + |.if "intins" ~= "div" + | + | // Check for two integers. + | sextw CARG3, CARG1 + | bne TMP0, TISNUM, >5 + |. sextw CARG4, CARG2 + | bne TMP1, TISNUM, >5 + | + |.if "intins" == "addu" + |. intins CRET1, CARG3, CARG4 + | xor TMP1, CRET1, CARG3 // ((y^a) & (y^b)) < 0: overflow. + | xor TMP2, CRET1, CARG4 + | and TMP1, TMP1, TMP2 + | bltz TMP1, ->vmeta_arith + |. daddu RA, BASE, RA + |.elif "intins" == "subu" + |. intins CRET1, CARG3, CARG4 + | xor TMP1, CRET1, CARG3 // ((y^a) & (a^b)) < 0: overflow. + | xor TMP2, CARG3, CARG4 + | and TMP1, TMP1, TMP2 + | bltz TMP1, ->vmeta_arith + |. daddu RA, BASE, RA + |.elif "intins" == "mult" + |. intins CARG3, CARG4 + | mflo CRET1 + | mfhi TMP2 + | sra TMP1, CRET1, 31 + | bne TMP1, TMP2, ->vmeta_arith + |. daddu RA, BASE, RA + |.else + |. load_got lj_vm_modi + | beqz CARG4, ->vmeta_arith + |. daddu RA, BASE, RA + | move CARG1, CARG3 + | call_extern + |. move CARG2, CARG4 + |.endif + | + | zextw CRET1, CRET1 + | settp CRET1, TISNUM + | ins_next1 + | sd CRET1, 0(RA) + |3: + | ins_next2 + | + |.endif + | + |5: // Check for two numbers. + | .FPU ldc1 f20, 0(RB) + | sltu AT, TMP0, TISNUM + | sltu TMP0, TMP1, TISNUM + | .FPU ldc1 f22, 0(RC) + | and AT, AT, TMP0 + | beqz AT, ->vmeta_arith + |. daddu RA, BASE, RA + | + |.if FPU + | fpins FRET1, f20, f22 + |.elif "fpcall" == "sfpmod" + | sfpmod + |.else + | load_got fpcall + | call_extern + |. nop + |.endif + | + | ins_next1 + |.if "intins" ~= "div" + | b <3 + |.endif + |.if FPU + |. sdc1 FRET1, 0(RA) + |.else + |. sd CRET1, 0(RA) + |.endif + |.if "intins" == "div" + | ins_next2 + |.endif + | + |.endmacro + + case BC_ADDVN: case BC_ADDNV: case BC_ADDVV: + | ins_arith addu, add.d, __adddf3, none + break; + case BC_SUBVN: case BC_SUBNV: case BC_SUBVV: + | ins_arith subu, sub.d, __subdf3, none + break; + case BC_MULVN: case BC_MULNV: case BC_MULVV: + | ins_arith mult, mul.d, __muldf3, none + break; + case BC_DIVVN: + | ins_arith div, div.d, __divdf3, ->BC_DIVVN_Z + break; + case BC_DIVNV: case BC_DIVVV: + | ins_arithpre ->BC_DIVVN_Z + break; + case BC_MODVN: + | ins_arith modi, fpmod, sfpmod, ->BC_MODVN_Z + break; + case BC_MODNV: case BC_MODVV: + | ins_arithpre ->BC_MODVN_Z + break; + case BC_POW: + | ins_arithpre none + | ld CARG1, 0(RB) + | ld CARG2, 0(RC) + | gettp TMP0, CARG1 + | gettp TMP1, CARG2 + | sltiu TMP0, TMP0, LJ_TISNUM + | sltiu TMP1, TMP1, LJ_TISNUM + | and AT, TMP0, TMP1 + | load_got pow + | beqz AT, ->vmeta_arith + |. daddu RA, BASE, RA + |.if FPU + | ldc1 FARG1, 0(RB) + | ldc1 FARG2, 0(RC) + |.endif + | call_extern + |. nop + | ins_next1 + |.if FPU + | sdc1 FRET1, 0(RA) + |.else + | sd CRET1, 0(RA) + |.endif + | ins_next2 + break; + + case BC_CAT: + | // RA = dst*8, RB = src_start*8, RC = src_end*8 + | decode_RB8a RB, INS + | decode_RB8b RB + | decode_RDtoRC8 RC, RD + | dsubu CARG3, RC, RB + | sd BASE, L->base + | daddu CARG2, BASE, RC + | move MULTRES, RB + |->BC_CAT_Z: + | load_got lj_meta_cat + | srl CARG3, CARG3, 3 + | sd PC, SAVE_PC + | call_intern lj_meta_cat // (lua_State *L, TValue *top, int left) + |. move CARG1, L + | // Returns NULL (finished) or TValue * (metamethod). + | bnez CRET1, ->vmeta_binop + |. ld BASE, L->base + | daddu RB, BASE, MULTRES + | ld CRET1, 0(RB) + | daddu RA, BASE, RA + | ins_next1 + | sd CRET1, 0(RA) + | ins_next2 + break; + + /* -- Constant ops ------------------------------------------------------ */ + + case BC_KSTR: + | // RA = dst*8, RD = str_const*8 (~) + | dsubu TMP1, KBASE, RD + | ins_next1 + | li TMP2, LJ_TSTR + | ld TMP0, -8(TMP1) // KBASE-8-str_const*8 + | daddu RA, BASE, RA + | settp TMP0, TMP2 + | sd TMP0, 0(RA) + | ins_next2 + break; + case BC_KCDATA: + |.if FFI + | // RA = dst*8, RD = cdata_const*8 (~) + | dsubu TMP1, KBASE, RD + | ins_next1 + | ld TMP0, -8(TMP1) // KBASE-8-cdata_const*8 + | li TMP2, LJ_TCDATA + | daddu RA, BASE, RA + | settp TMP0, TMP2 + | sd TMP0, 0(RA) + | ins_next2 + |.endif + break; + case BC_KSHORT: + | // RA = dst*8, RD = int16_literal*8 + | sra RD, INS, 16 + | daddu RA, BASE, RA + | zextw RD, RD + | ins_next1 + | settp RD, TISNUM + | sd RD, 0(RA) + | ins_next2 + break; + case BC_KNUM: + | // RA = dst*8, RD = num_const*8 + | daddu RD, KBASE, RD + | daddu RA, BASE, RA + | ld CRET1, 0(RD) + | ins_next1 + | sd CRET1, 0(RA) + | ins_next2 + break; + case BC_KPRI: + | // RA = dst*8, RD = primitive_type*8 (~) + | daddu RA, BASE, RA + | dsll TMP0, RD, 44 + | not TMP0, TMP0 + | ins_next1 + | sd TMP0, 0(RA) + | ins_next2 + break; + case BC_KNIL: + | // RA = base*8, RD = end*8 + | daddu RA, BASE, RA + | sd TISNIL, 0(RA) + | daddiu RA, RA, 8 + | daddu RD, BASE, RD + |1: + | sd TISNIL, 0(RA) + | slt AT, RA, RD + | bnez AT, <1 + |. daddiu RA, RA, 8 + | ins_next_ + break; + + /* -- Upvalue and function ops ------------------------------------------ */ + + case BC_UGET: + | // RA = dst*8, RD = uvnum*8 + | ld LFUNC:RB, FRAME_FUNC(BASE) + | daddu RA, BASE, RA + | cleartp LFUNC:RB + | daddu RD, RD, LFUNC:RB + | ld UPVAL:RB, LFUNC:RD->uvptr + | ins_next1 + | ld TMP1, UPVAL:RB->v + | ld CRET1, 0(TMP1) + | sd CRET1, 0(RA) + | ins_next2 + break; + case BC_USETV: + | // RA = uvnum*8, RD = src*8 + | ld LFUNC:RB, FRAME_FUNC(BASE) + | daddu RD, BASE, RD + | cleartp LFUNC:RB + | daddu RA, RA, LFUNC:RB + | ld UPVAL:RB, LFUNC:RA->uvptr + | ld CRET1, 0(RD) + | lbu TMP3, UPVAL:RB->marked + | ld CARG2, UPVAL:RB->v + | andi TMP3, TMP3, LJ_GC_BLACK // isblack(uv) + | lbu TMP0, UPVAL:RB->closed + | gettp TMP2, CRET1 + | sd CRET1, 0(CARG2) + | li AT, LJ_GC_BLACK|1 + | or TMP3, TMP3, TMP0 + | beq TMP3, AT, >2 // Upvalue is closed and black? + |. daddiu TMP2, TMP2, -(LJ_TNUMX+1) + |1: + | ins_next + | + |2: // Check if new value is collectable. + | sltiu AT, TMP2, LJ_TISGCV - (LJ_TNUMX+1) + | beqz AT, <1 // tvisgcv(v) + |. cleartp GCOBJ:CRET1, CRET1 + | lbu TMP3, GCOBJ:CRET1->gch.marked + | andi TMP3, TMP3, LJ_GC_WHITES // iswhite(v) + | beqz TMP3, <1 + |. load_got lj_gc_barrieruv + | // Crossed a write barrier. Move the barrier forward. + | call_intern lj_gc_barrieruv // (global_State *g, TValue *tv) + |. daddiu CARG1, DISPATCH, GG_DISP2G + | b <1 + |. nop + break; + case BC_USETS: + | // RA = uvnum*8, RD = str_const*8 (~) + | ld LFUNC:RB, FRAME_FUNC(BASE) + | dsubu TMP1, KBASE, RD + | cleartp LFUNC:RB + | daddu RA, RA, LFUNC:RB + | ld UPVAL:RB, LFUNC:RA->uvptr + | ld STR:TMP1, -8(TMP1) // KBASE-8-str_const*8 + | lbu TMP2, UPVAL:RB->marked + | ld CARG2, UPVAL:RB->v + | lbu TMP3, STR:TMP1->marked + | andi AT, TMP2, LJ_GC_BLACK // isblack(uv) + | lbu TMP2, UPVAL:RB->closed + | li TMP0, LJ_TSTR + | settp TMP1, TMP0 + | bnez AT, >2 + |. sd TMP1, 0(CARG2) + |1: + | ins_next + | + |2: // Check if string is white and ensure upvalue is closed. + | beqz TMP2, <1 + |. andi AT, TMP3, LJ_GC_WHITES // iswhite(str) + | beqz AT, <1 + |. load_got lj_gc_barrieruv + | // Crossed a write barrier. Move the barrier forward. + | call_intern lj_gc_barrieruv // (global_State *g, TValue *tv) + |. daddiu CARG1, DISPATCH, GG_DISP2G + | b <1 + |. nop + break; + case BC_USETN: + | // RA = uvnum*8, RD = num_const*8 + | ld LFUNC:RB, FRAME_FUNC(BASE) + | daddu RD, KBASE, RD + | cleartp LFUNC:RB + | daddu RA, RA, LFUNC:RB + | ld UPVAL:RB, LFUNC:RA->uvptr + | ld CRET1, 0(RD) + | ld TMP1, UPVAL:RB->v + | ins_next1 + | sd CRET1, 0(TMP1) + | ins_next2 + break; + case BC_USETP: + | // RA = uvnum*8, RD = primitive_type*8 (~) + | ld LFUNC:RB, FRAME_FUNC(BASE) + | dsll TMP0, RD, 44 + | cleartp LFUNC:RB + | daddu RA, RA, LFUNC:RB + | not TMP0, TMP0 + | ld UPVAL:RB, LFUNC:RA->uvptr + | ins_next1 + | ld TMP1, UPVAL:RB->v + | sd TMP0, 0(TMP1) + | ins_next2 + break; + + case BC_UCLO: + | // RA = level*8, RD = target + | ld TMP2, L->openupval + | branch_RD // Do this first since RD is not saved. + | load_got lj_func_closeuv + | sd BASE, L->base + | beqz TMP2, >1 + |. move CARG1, L + | call_intern lj_func_closeuv // (lua_State *L, TValue *level) + |. daddu CARG2, BASE, RA + | ld BASE, L->base + |1: + | ins_next + break; + + case BC_FNEW: + | // RA = dst*8, RD = proto_const*8 (~) (holding function prototype) + | load_got lj_func_newL_gc + | dsubu TMP1, KBASE, RD + | ld CARG3, FRAME_FUNC(BASE) + | ld CARG2, -8(TMP1) // KBASE-8-tab_const*8 + | sd BASE, L->base + | sd PC, SAVE_PC + | cleartp CARG3 + | // (lua_State *L, GCproto *pt, GCfuncL *parent) + | call_intern lj_func_newL_gc + |. move CARG1, L + | // Returns GCfuncL *. + | li TMP0, LJ_TFUNC + | ld BASE, L->base + | ins_next1 + | settp CRET1, TMP0 + | daddu RA, BASE, RA + | sd CRET1, 0(RA) + | ins_next2 + break; + + /* -- Table ops --------------------------------------------------------- */ + + case BC_TNEW: + case BC_TDUP: + | // RA = dst*8, RD = (hbits|asize)*8 | tab_const*8 (~) + | ld TMP0, DISPATCH_GL(gc.total)(DISPATCH) + | ld TMP1, DISPATCH_GL(gc.threshold)(DISPATCH) + | sd BASE, L->base + | sd PC, SAVE_PC + | sltu AT, TMP0, TMP1 + | beqz AT, >5 + |1: + if (op == BC_TNEW) { + | load_got lj_tab_new + | srl CARG2, RD, 3 + | andi CARG2, CARG2, 0x7ff + | li TMP0, 0x801 + | addiu AT, CARG2, -0x7ff + | srl CARG3, RD, 14 + | movz CARG2, TMP0, AT + | // (lua_State *L, int32_t asize, uint32_t hbits) + | call_intern lj_tab_new + |. move CARG1, L + | // Returns Table *. + } else { + | load_got lj_tab_dup + | dsubu TMP1, KBASE, RD + | move CARG1, L + | call_intern lj_tab_dup // (lua_State *L, Table *kt) + |. ld CARG2, -8(TMP1) // KBASE-8-str_const*8 + | // Returns Table *. + } + | li TMP0, LJ_TTAB + | ld BASE, L->base + | ins_next1 + | daddu RA, BASE, RA + | settp CRET1, TMP0 + | sd CRET1, 0(RA) + | ins_next2 + |5: + | load_got lj_gc_step_fixtop + | move MULTRES, RD + | call_intern lj_gc_step_fixtop // (lua_State *L) + |. move CARG1, L + | b <1 + |. move RD, MULTRES + break; + + case BC_GGET: + | // RA = dst*8, RD = str_const*8 (~) + case BC_GSET: + | // RA = src*8, RD = str_const*8 (~) + | ld LFUNC:TMP2, FRAME_FUNC(BASE) + | dsubu TMP1, KBASE, RD + | ld STR:RC, -8(TMP1) // KBASE-8-str_const*8 + | cleartp LFUNC:TMP2 + | ld TAB:RB, LFUNC:TMP2->env + if (op == BC_GGET) { + | b ->BC_TGETS_Z + } else { + | b ->BC_TSETS_Z + } + |. daddu RA, BASE, RA + break; + + case BC_TGETV: + | // RA = dst*8, RB = table*8, RC = key*8 + | decode_RB8a RB, INS + | decode_RB8b RB + | decode_RDtoRC8 RC, RD + | daddu CARG2, BASE, RB + | daddu CARG3, BASE, RC + | ld TAB:RB, 0(CARG2) + | ld TMP2, 0(CARG3) + | daddu RA, BASE, RA + | checktab TAB:RB, ->vmeta_tgetv + | gettp TMP3, TMP2 + | bne TMP3, TISNUM, >5 // Integer key? + |. lw TMP0, TAB:RB->asize + | sextw TMP2, TMP2 + | ld TMP1, TAB:RB->array + | sltu AT, TMP2, TMP0 + | sll TMP2, TMP2, 3 + | beqz AT, ->vmeta_tgetv // Integer key and in array part? + |. daddu TMP2, TMP1, TMP2 + | ld AT, 0(TMP2) + | beq AT, TISNIL, >2 + |. ld CRET1, 0(TMP2) + |1: + | ins_next1 + | sd CRET1, 0(RA) + | ins_next2 + | + |2: // Check for __index if table value is nil. + | ld TAB:TMP2, TAB:RB->metatable + | beqz TAB:TMP2, <1 // No metatable: done. + |. nop + | lbu TMP0, TAB:TMP2->nomm + | andi TMP0, TMP0, 1<<MM_index + | bnez TMP0, <1 // 'no __index' flag set: done. + |. nop + | b ->vmeta_tgetv + |. nop + | + |5: + | li AT, LJ_TSTR + | bne TMP3, AT, ->vmeta_tgetv + |. cleartp RC, TMP2 + | b ->BC_TGETS_Z // String key? + |. nop + break; + case BC_TGETS: + | // RA = dst*8, RB = table*8, RC = str_const*8 (~) + | decode_RB8a RB, INS + | decode_RB8b RB + | decode_RC8a RC, INS + | daddu CARG2, BASE, RB + | decode_RC8b RC + | ld TAB:RB, 0(CARG2) + | dsubu CARG3, KBASE, RC + | daddu RA, BASE, RA + | ld STR:RC, -8(CARG3) // KBASE-8-str_const*8 + | checktab TAB:RB, ->vmeta_tgets1 + |->BC_TGETS_Z: + | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = dst*8 + | lw TMP0, TAB:RB->hmask + | lw TMP1, STR:RC->hash + | ld NODE:TMP2, TAB:RB->node + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | sll TMP0, TMP1, 5 + | sll TMP1, TMP1, 3 + | subu TMP1, TMP0, TMP1 + | li TMP3, LJ_TSTR + | daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + | settp STR:RC, TMP3 // Tagged key to look for. + |1: + | ld CARG1, NODE:TMP2->key + | ld CRET1, NODE:TMP2->val + | ld NODE:TMP1, NODE:TMP2->next + | bne CARG1, RC, >4 + |. ld TAB:TMP3, TAB:RB->metatable + | beq CRET1, TISNIL, >5 // Key found, but nil value? + |. nop + |3: + | ins_next1 + | sd CRET1, 0(RA) + | ins_next2 + | + |4: // Follow hash chain. + | bnez NODE:TMP1, <1 + |. move NODE:TMP2, NODE:TMP1 + | // End of hash chain: key not found, nil result. + | + |5: // Check for __index if table value is nil. + | beqz TAB:TMP3, <3 // No metatable: done. + |. move CRET1, TISNIL + | lbu TMP0, TAB:TMP3->nomm + | andi TMP0, TMP0, 1<<MM_index + | bnez TMP0, <3 // 'no __index' flag set: done. + |. nop + | b ->vmeta_tgets + |. nop + break; + case BC_TGETB: + | // RA = dst*8, RB = table*8, RC = index*8 + | decode_RB8a RB, INS + | decode_RB8b RB + | daddu CARG2, BASE, RB + | decode_RDtoRC8 RC, RD + | ld TAB:RB, 0(CARG2) + | daddu RA, BASE, RA + | srl TMP0, RC, 3 + | checktab TAB:RB, ->vmeta_tgetb + | lw TMP1, TAB:RB->asize + | ld TMP2, TAB:RB->array + | sltu AT, TMP0, TMP1 + | beqz AT, ->vmeta_tgetb + |. daddu RC, TMP2, RC + | ld AT, 0(RC) + | beq AT, TISNIL, >5 + |. ld CRET1, 0(RC) + |1: + | ins_next1 + | sd CRET1, 0(RA) + | ins_next2 + | + |5: // Check for __index if table value is nil. + | ld TAB:TMP2, TAB:RB->metatable + | beqz TAB:TMP2, <1 // No metatable: done. + |. nop + | lbu TMP1, TAB:TMP2->nomm + | andi TMP1, TMP1, 1<<MM_index + | bnez TMP1, <1 // 'no __index' flag set: done. + |. nop + | b ->vmeta_tgetb // Caveat: preserve TMP0 and CARG2! + |. nop + break; + case BC_TGETR: + | // RA = dst*8, RB = table*8, RC = key*8 + | decode_RB8a RB, INS + | decode_RB8b RB + | decode_RDtoRC8 RC, RD + | daddu RB, BASE, RB + | daddu RC, BASE, RC + | ld TAB:CARG1, 0(RB) + | lw CARG2, LO(RC) + | daddu RA, BASE, RA + | cleartp TAB:CARG1 + | lw TMP0, TAB:CARG1->asize + | ld TMP1, TAB:CARG1->array + | sltu AT, CARG2, TMP0 + | sll TMP2, CARG2, 3 + | beqz AT, ->vmeta_tgetr // In array part? + |. daddu CRET1, TMP1, TMP2 + | ld CARG2, 0(CRET1) + |->BC_TGETR_Z: + | ins_next1 + | sd CARG2, 0(RA) + | ins_next2 + break; + + case BC_TSETV: + | // RA = src*8, RB = table*8, RC = key*8 + | decode_RB8a RB, INS + | decode_RB8b RB + | decode_RDtoRC8 RC, RD + | daddu CARG2, BASE, RB + | daddu CARG3, BASE, RC + | ld RB, 0(CARG2) + | ld TMP2, 0(CARG3) + | daddu RA, BASE, RA + | checktab RB, ->vmeta_tsetv + | checkint TMP2, >5 + |. sextw RC, TMP2 + | lw TMP0, TAB:RB->asize + | ld TMP1, TAB:RB->array + | sltu AT, RC, TMP0 + | sll TMP2, RC, 3 + | beqz AT, ->vmeta_tsetv // Integer key and in array part? + |. daddu TMP1, TMP1, TMP2 + | ld TMP0, 0(TMP1) + | lbu TMP3, TAB:RB->marked + | beq TMP0, TISNIL, >3 + |. ld CRET1, 0(RA) + |1: + | andi AT, TMP3, LJ_GC_BLACK // isblack(table) + | bnez AT, >7 + |. sd CRET1, 0(TMP1) + |2: + | ins_next + | + |3: // Check for __newindex if previous value is nil. + | ld TAB:TMP2, TAB:RB->metatable + | beqz TAB:TMP2, <1 // No metatable: done. + |. nop + | lbu TMP2, TAB:TMP2->nomm + | andi TMP2, TMP2, 1<<MM_newindex + | bnez TMP2, <1 // 'no __newindex' flag set: done. + |. nop + | b ->vmeta_tsetv + |. nop + | + |5: + | gettp AT, TMP2 + | daddiu AT, AT, -LJ_TSTR + | bnez AT, ->vmeta_tsetv + |. nop + | b ->BC_TSETS_Z // String key? + |. cleartp STR:RC, TMP2 + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0, <2 + break; + case BC_TSETS: + | // RA = src*8, RB = table*8, RC = str_const*8 (~) + | decode_RB8a RB, INS + | decode_RB8b RB + | daddu CARG2, BASE, RB + | decode_RC8a RC, INS + | ld TAB:RB, 0(CARG2) + | decode_RC8b RC + | dsubu CARG3, KBASE, RC + | ld RC, -8(CARG3) // KBASE-8-str_const*8 + | daddu RA, BASE, RA + | cleartp STR:RC + | checktab TAB:RB, ->vmeta_tsets1 + |->BC_TSETS_Z: + | // TAB:RB = GCtab *, STR:RC = GCstr *, RA = BASE+src*8 + | lw TMP0, TAB:RB->hmask + | lw TMP1, STR:RC->hash + | ld NODE:TMP2, TAB:RB->node + | sb r0, TAB:RB->nomm // Clear metamethod cache. + | and TMP1, TMP1, TMP0 // idx = str->hash & tab->hmask + | sll TMP0, TMP1, 5 + | sll TMP1, TMP1, 3 + | subu TMP1, TMP0, TMP1 + | li TMP3, LJ_TSTR + | daddu NODE:TMP2, NODE:TMP2, TMP1 // node = tab->node + (idx*32-idx*8) + | settp STR:RC, TMP3 // Tagged key to look for. + |.if FPU + | ldc1 f20, 0(RA) + |.else + | ld CRET1, 0(RA) + |.endif + |1: + | ld TMP0, NODE:TMP2->key + | ld CARG2, NODE:TMP2->val + | ld NODE:TMP1, NODE:TMP2->next + | bne TMP0, RC, >5 + |. lbu TMP3, TAB:RB->marked + | beq CARG2, TISNIL, >4 // Key found, but nil value? + |. ld TAB:TMP0, TAB:RB->metatable + |2: + | andi AT, TMP3, LJ_GC_BLACK // isblack(table) + | bnez AT, >7 + |.if FPU + |. sdc1 f20, NODE:TMP2->val + |.else + |. sd CRET1, NODE:TMP2->val + |.endif + |3: + | ins_next + | + |4: // Check for __newindex if previous value is nil. + | beqz TAB:TMP0, <2 // No metatable: done. + |. nop + | lbu TMP0, TAB:TMP0->nomm + | andi TMP0, TMP0, 1<<MM_newindex + | bnez TMP0, <2 // 'no __newindex' flag set: done. + |. nop + | b ->vmeta_tsets + |. nop + | + |5: // Follow hash chain. + | bnez NODE:TMP1, <1 + |. move NODE:TMP2, NODE:TMP1 + | // End of hash chain: key not found, add a new one + | + | // But check for __newindex first. + | ld TAB:TMP2, TAB:RB->metatable + | beqz TAB:TMP2, >6 // No metatable: continue. + |. daddiu CARG3, DISPATCH, DISPATCH_GL(tmptv) + | lbu TMP0, TAB:TMP2->nomm + | andi TMP0, TMP0, 1<<MM_newindex + | beqz TMP0, ->vmeta_tsets // 'no __newindex' flag NOT set: check. + |6: + | load_got lj_tab_newkey + | sd RC, 0(CARG3) + | sd BASE, L->base + | move CARG2, TAB:RB + | sd PC, SAVE_PC + | call_intern lj_tab_newkey // (lua_State *L, GCtab *t, TValue *k + |. move CARG1, L + | // Returns TValue *. + | ld BASE, L->base + |.if FPU + | b <3 // No 2nd write barrier needed. + |. sdc1 f20, 0(CRET1) + |.else + | ld CARG1, 0(RA) + | b <3 // No 2nd write barrier needed. + |. sd CARG1, 0(CRET1) + |.endif + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0, <3 + break; + case BC_TSETB: + | // RA = src*8, RB = table*8, RC = index*8 + | decode_RB8a RB, INS + | decode_RB8b RB + | daddu CARG2, BASE, RB + | decode_RDtoRC8 RC, RD + | ld TAB:RB, 0(CARG2) + | daddu RA, BASE, RA + | srl TMP0, RC, 3 + | checktab RB, ->vmeta_tsetb + | lw TMP1, TAB:RB->asize + | ld TMP2, TAB:RB->array + | sltu AT, TMP0, TMP1 + | beqz AT, ->vmeta_tsetb + |. daddu RC, TMP2, RC + | ld TMP1, 0(RC) + | lbu TMP3, TAB:RB->marked + | beq TMP1, TISNIL, >5 + |1: + |. ld CRET1, 0(RA) + | andi AT, TMP3, LJ_GC_BLACK // isblack(table) + | bnez AT, >7 + |. sd CRET1, 0(RC) + |2: + | ins_next + | + |5: // Check for __newindex if previous value is nil. + | ld TAB:TMP2, TAB:RB->metatable + | beqz TAB:TMP2, <1 // No metatable: done. + |. nop + | lbu TMP1, TAB:TMP2->nomm + | andi TMP1, TMP1, 1<<MM_newindex + | bnez TMP1, <1 // 'no __newindex' flag set: done. + |. nop + | b ->vmeta_tsetb // Caveat: preserve TMP0 and CARG2! + |. nop + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:RB, TMP3, TMP0, <2 + break; + case BC_TSETR: + | // RA = dst*8, RB = table*8, RC = key*8 + | decode_RB8a RB, INS + | decode_RB8b RB + | decode_RDtoRC8 RC, RD + | daddu CARG1, BASE, RB + | daddu CARG3, BASE, RC + | ld TAB:CARG2, 0(CARG1) + | lw CARG3, LO(CARG3) + | cleartp TAB:CARG2 + | lbu TMP3, TAB:CARG2->marked + | lw TMP0, TAB:CARG2->asize + | ld TMP1, TAB:CARG2->array + | andi AT, TMP3, LJ_GC_BLACK // isblack(table) + | bnez AT, >7 + |. daddu RA, BASE, RA + |2: + | sltu AT, CARG3, TMP0 + | sll TMP2, CARG3, 3 + | beqz AT, ->vmeta_tsetr // In array part? + |. daddu CRET1, TMP1, TMP2 + |->BC_TSETR_Z: + | ld CARG1, 0(RA) + | ins_next1 + | sd CARG1, 0(CRET1) + | ins_next2 + | + |7: // Possible table write barrier for the value. Skip valiswhite check. + | barrierback TAB:CARG2, TMP3, TMP0, <2 + break; + + case BC_TSETM: + | // RA = base*8 (table at base-1), RD = num_const*8 (start index) + | daddu RA, BASE, RA + |1: + | daddu TMP3, KBASE, RD + | ld TAB:CARG2, -8(RA) // Guaranteed to be a table. + | addiu TMP0, MULTRES, -8 + | lw TMP3, LO(TMP3) // Integer constant is in lo-word. + | beqz TMP0, >4 // Nothing to copy? + |. srl CARG3, TMP0, 3 + | cleartp CARG2 + | addu CARG3, CARG3, TMP3 + | lw TMP2, TAB:CARG2->asize + | sll TMP1, TMP3, 3 + | lbu TMP3, TAB:CARG2->marked + | ld CARG1, TAB:CARG2->array + | sltu AT, TMP2, CARG3 + | bnez AT, >5 + |. daddu TMP2, RA, TMP0 + | daddu TMP1, TMP1, CARG1 + | andi TMP0, TMP3, LJ_GC_BLACK // isblack(table) + |3: // Copy result slots to table. + | ld CRET1, 0(RA) + | daddiu RA, RA, 8 + | sltu AT, RA, TMP2 + | sd CRET1, 0(TMP1) + | bnez AT, <3 + |. daddiu TMP1, TMP1, 8 + | bnez TMP0, >7 + |. nop + |4: + | ins_next + | + |5: // Need to resize array part. + | load_got lj_tab_reasize + | sd BASE, L->base + | sd PC, SAVE_PC + | move BASE, RD + | call_intern lj_tab_reasize // (lua_State *L, GCtab *t, int nasize) + |. move CARG1, L + | // Must not reallocate the stack. + | move RD, BASE + | b <1 + |. ld BASE, L->base // Reload BASE for lack of a saved register. + | + |7: // Possible table write barrier for any value. Skip valiswhite check. + | barrierback TAB:CARG2, TMP3, TMP0, <4 + break; + + /* -- Calls and vararg handling ----------------------------------------- */ + + case BC_CALLM: + | // RA = base*8, (RB = (nresults+1)*8,) RC = extra_nargs*8 + | decode_RDtoRC8 NARGS8:RC, RD + | b ->BC_CALL_Z + |. addu NARGS8:RC, NARGS8:RC, MULTRES + break; + case BC_CALL: + | // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8 + | decode_RDtoRC8 NARGS8:RC, RD + |->BC_CALL_Z: + | move TMP2, BASE + | daddu BASE, BASE, RA + | ld LFUNC:RB, 0(BASE) + | daddiu BASE, BASE, 16 + | addiu NARGS8:RC, NARGS8:RC, -8 + | checkfunc RB, ->vmeta_call + | ins_call + break; + + case BC_CALLMT: + | // RA = base*8, (RB = 0,) RC = extra_nargs*8 + | addu NARGS8:RD, NARGS8:RD, MULTRES // BC_CALLT gets RC from RD. + | // Fall through. Assumes BC_CALLT follows. + break; + case BC_CALLT: + | // RA = base*8, (RB = 0,) RC = (nargs+1)*8 + | daddu RA, BASE, RA + | ld RB, 0(RA) + | move NARGS8:RC, RD + | ld TMP1, FRAME_PC(BASE) + | daddiu RA, RA, 16 + | addiu NARGS8:RC, NARGS8:RC, -8 + | checktp CARG3, RB, -LJ_TFUNC, ->vmeta_callt + |->BC_CALLT_Z: + | andi TMP0, TMP1, FRAME_TYPE // Caveat: preserve TMP0 until the 'or'. + | lbu TMP3, LFUNC:CARG3->ffid + | bnez TMP0, >7 + |. xori TMP2, TMP1, FRAME_VARG + |1: + | sd RB, FRAME_FUNC(BASE) // Copy function down, but keep PC. + | sltiu AT, TMP3, 2 // (> FF_C) Calling a fast function? + | move TMP2, BASE + | move RB, CARG3 + | beqz NARGS8:RC, >3 + |. move TMP3, NARGS8:RC + |2: + | ld CRET1, 0(RA) + | daddiu RA, RA, 8 + | addiu TMP3, TMP3, -8 + | sd CRET1, 0(TMP2) + | bnez TMP3, <2 + |. daddiu TMP2, TMP2, 8 + |3: + | or TMP0, TMP0, AT + | beqz TMP0, >5 + |. nop + |4: + | ins_callt + | + |5: // Tailcall to a fast function with a Lua frame below. + | lw INS, -4(TMP1) + | decode_RA8a RA, INS + | decode_RA8b RA + | dsubu TMP1, BASE, RA + | ld TMP1, -32(TMP1) + | cleartp LFUNC:TMP1 + | ld TMP1, LFUNC:TMP1->pc + | b <4 + |. ld KBASE, PC2PROTO(k)(TMP1) // Need to prepare KBASE. + | + |7: // Tailcall from a vararg function. + | andi AT, TMP2, FRAME_TYPEP + | bnez AT, <1 // Vararg frame below? + |. dsubu TMP2, BASE, TMP2 // Relocate BASE down. + | move BASE, TMP2 + | ld TMP1, FRAME_PC(TMP2) + | b <1 + |. andi TMP0, TMP1, FRAME_TYPE + break; + + case BC_ITERC: + | // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8)) + | move TMP2, BASE // Save old BASE fir vmeta_call. + | daddu BASE, BASE, RA + | ld RB, -24(BASE) + | ld CARG1, -16(BASE) + | ld CARG2, -8(BASE) + | li NARGS8:RC, 16 // Iterators get 2 arguments. + | sd RB, 0(BASE) // Copy callable. + | sd CARG1, 16(BASE) // Copy state. + | sd CARG2, 24(BASE) // Copy control var. + | daddiu BASE, BASE, 16 + | checkfunc RB, ->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 + | daddu RA, BASE, RA + | ld TAB:RB, -16(RA) + | lw RC, -8+LO(RA) // Get index from control var. + | cleartp TAB:RB + | daddiu PC, PC, 4 + | lw TMP0, TAB:RB->asize + | ld TMP1, TAB:RB->array + | dsll CARG3, TISNUM, 47 + |1: // Traverse array part. + | sltu AT, RC, TMP0 + | beqz AT, >5 // Index points after array part? + |. sll TMP3, RC, 3 + | daddu TMP3, TMP1, TMP3 + | ld CARG1, 0(TMP3) + | lhu RD, -4+OFS_RD(PC) + | or TMP2, RC, CARG3 + | beq CARG1, TISNIL, <1 // Skip holes in array part. + |. addiu RC, RC, 1 + | sd TMP2, 0(RA) + | sd CARG1, 8(RA) + | or TMP0, RC, CARG3 + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | decode_RD4b RD + | daddu RD, RD, TMP3 + | sw TMP0, -8+LO(RA) // Update control var. + | daddu PC, PC, RD + |3: + | ins_next + | + |5: // Traverse hash part. + | lw TMP1, TAB:RB->hmask + | subu RC, RC, TMP0 + | ld TMP2, TAB:RB->node + |6: + | sltu AT, TMP1, RC // End of iteration? Branch to ITERL+1. + | bnez AT, <3 + |. sll TMP3, RC, 5 + | sll RB, RC, 3 + | subu TMP3, TMP3, RB + | daddu NODE:TMP3, TMP3, TMP2 + | ld CARG1, 0(NODE:TMP3) + | lhu RD, -4+OFS_RD(PC) + | beq CARG1, TISNIL, <6 // Skip holes in hash part. + |. addiu RC, RC, 1 + | ld CARG2, NODE:TMP3->key + | lui TMP3, (-(BCBIAS_J*4 >> 16) & 65535) + | sd CARG1, 8(RA) + | addu RC, RC, TMP0 + | decode_RD4b RD + | addu RD, RD, TMP3 + | sd CARG2, 0(RA) + | daddu PC, PC, RD + | b <3 + |. sw RC, -8+LO(RA) // Update control var. + break; + + case BC_ISNEXT: + | // RA = base*8, RD = target (points to ITERN) + | daddu RA, BASE, RA + | srl TMP0, RD, 1 + | ld CFUNC:CARG1, -24(RA) + | daddu TMP0, PC, TMP0 + | ld CARG2, -16(RA) + | ld CARG3, -8(RA) + | lui TMP2, (-(BCBIAS_J*4 >> 16) & 65535) + | checkfunc CFUNC:CARG1, >5 + | gettp CARG2, CARG2 + | daddiu CARG2, CARG2, -LJ_TTAB + | lbu TMP1, CFUNC:CARG1->ffid + | daddiu CARG3, CARG3, -LJ_TNIL + | or AT, CARG2, CARG3 + | daddiu TMP1, TMP1, -FF_next_N + | or AT, AT, TMP1 + | bnez AT, >5 + |. lui TMP1, 0xfffe + | daddu PC, TMP0, TMP2 + | ori TMP1, TMP1, 0x7fff + | dsll TMP1, TMP1, 32 + | sd TMP1, -8(RA) + |1: + | ins_next + |5: // Despecialize bytecode if any of the checks fail. + | li TMP3, BC_JMP + | li TMP1, BC_ITERC + | sb TMP3, -4+OFS_OP(PC) + | daddu PC, TMP0, TMP2 + | b <1 + |. sb TMP1, OFS_OP(PC) + break; + + case BC_VARG: + | // RA = base*8, RB = (nresults+1)*8, RC = numparams*8 + | ld TMP0, FRAME_PC(BASE) + | decode_RDtoRC8 RC, RD + | decode_RB8a RB, INS + | daddu RC, BASE, RC + | decode_RB8b RB + | daddu RA, BASE, RA + | daddiu RC, RC, FRAME_VARG + | daddu TMP2, RA, RB + | daddiu TMP3, BASE, -16 // TMP3 = vtop + | dsubu RC, RC, TMP0 // RC = vbase + | // Note: RC may now be even _above_ BASE if nargs was < numparams. + | beqz RB, >5 // Copy all varargs? + |. dsubu TMP1, TMP3, RC + | daddiu TMP2, TMP2, -16 + |1: // Copy vararg slots to destination slots. + | ld CARG1, 0(RC) + | sltu AT, RC, TMP3 + | daddiu RC, RC, 8 + | movz CARG1, TISNIL, AT + | sd CARG1, 0(RA) + | sltu AT, RA, TMP2 + | bnez AT, <1 + |. daddiu RA, RA, 8 + |3: + | ins_next + | + |5: // Copy all varargs. + | ld TMP0, L->maxstack + | blez TMP1, <3 // No vararg slots? + |. li MULTRES, 8 // MULTRES = (0+1)*8 + | daddu TMP2, RA, TMP1 + | sltu AT, TMP0, TMP2 + | bnez AT, >7 + |. daddiu MULTRES, TMP1, 8 + |6: + | ld CRET1, 0(RC) + | daddiu RC, RC, 8 + | sd CRET1, 0(RA) + | sltu AT, RC, TMP3 + | bnez AT, <6 // More vararg slots? + |. daddiu RA, RA, 8 + | b <3 + |. nop + | + |7: // Grow stack for varargs. + | load_got lj_state_growstack + | sd RA, L->top + | dsubu RA, RA, BASE + | sd BASE, L->base + | dsubu BASE, RC, BASE // Need delta, because BASE may change. + | sd PC, SAVE_PC + | srl CARG2, TMP1, 3 + | call_intern lj_state_growstack // (lua_State *L, int n) + |. move CARG1, L + | move RC, BASE + | ld BASE, L->base + | daddu RA, BASE, RA + | daddu RC, BASE, RC + | b <6 + |. daddiu TMP3, BASE, -16 + break; + + /* -- Returns ----------------------------------------------------------- */ + + case BC_RETM: + | // RA = results*8, RD = extra_nresults*8 + | addu 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 + | ld PC, FRAME_PC(BASE) + | daddu RA, BASE, RA + | move MULTRES, RD + |1: + | andi TMP0, PC, FRAME_TYPE + | bnez TMP0, ->BC_RETV_Z + |. xori TMP1, PC, FRAME_VARG + | + |->BC_RET_Z: + | // BASE = base, RA = resultptr, RD = (nresults+1)*8, PC = return + | lw INS, -4(PC) + | daddiu TMP2, BASE, -16 + | daddiu RC, RD, -8 + | decode_RA8a TMP0, INS + | decode_RB8a RB, INS + | decode_RA8b TMP0 + | decode_RB8b RB + | daddu TMP3, TMP2, RB + | beqz RC, >3 + |. dsubu BASE, TMP2, TMP0 + |2: + | ld CRET1, 0(RA) + | daddiu RA, RA, 8 + | daddiu RC, RC, -8 + | sd CRET1, 0(TMP2) + | bnez RC, <2 + |. daddiu TMP2, TMP2, 8 + |3: + | daddiu TMP3, TMP3, -8 + |5: + | sltu AT, TMP2, TMP3 + | bnez AT, >6 + |. ld LFUNC:TMP1, FRAME_FUNC(BASE) + | ins_next1 + | cleartp LFUNC:TMP1 + | ld TMP1, LFUNC:TMP1->pc + | ld KBASE, PC2PROTO(k)(TMP1) + | ins_next2 + | + |6: // Fill up results with nil. + | sd TISNIL, 0(TMP2) + | b <5 + |. daddiu TMP2, TMP2, 8 + | + |->BC_RETV_Z: // Non-standard return case. + | andi TMP2, TMP1, FRAME_TYPEP + | bnez TMP2, ->vm_return + |. nop + | // Return from vararg function: relocate BASE down. + | dsubu BASE, BASE, TMP1 + | b <1 + |. ld PC, FRAME_PC(BASE) + break; + + case BC_RET0: case BC_RET1: + | // RA = results*8, RD = (nresults+1)*8 + | ld PC, FRAME_PC(BASE) + | daddu RA, BASE, RA + | move MULTRES, RD + | andi TMP0, PC, FRAME_TYPE + | bnez TMP0, ->BC_RETV_Z + |. xori TMP1, PC, FRAME_VARG + | lw INS, -4(PC) + | daddiu TMP2, BASE, -16 + if (op == BC_RET1) { + | ld CRET1, 0(RA) + } + | decode_RB8a RB, INS + | decode_RA8a RA, INS + | decode_RB8b RB + | decode_RA8b RA + | dsubu BASE, TMP2, RA + if (op == BC_RET1) { + | sd CRET1, 0(TMP2) + } + |5: + | sltu AT, RD, RB + | bnez AT, >6 + |. ld TMP1, FRAME_FUNC(BASE) + | ins_next1 + | cleartp LFUNC:TMP1 + | ld TMP1, LFUNC:TMP1->pc + | ld KBASE, PC2PROTO(k)(TMP1) + | ins_next2 + | + |6: // Fill up results with nil. + | daddiu TMP2, TMP2, 8 + | daddiu RD, RD, 8 + | b <5 + if (op == BC_RET1) { + |. sd TISNIL, 0(TMP2) + } else { + |. sd TISNIL, -8(TMP2) + } + 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); + | daddu RA, BASE, RA + | ld CARG1, FORL_IDX*8(RA) // IDX CARG1 - CARG3 type + | gettp CARG3, CARG1 + if (op != BC_JFORL) { + | srl RD, RD, 1 + | lui TMP2, (-(BCBIAS_J*4 >> 16) & 65535) + | daddu TMP2, RD, TMP2 + } + if (!vk) { + | ld CARG2, FORL_STOP*8(RA) // STOP CARG2 - CARG4 type + | ld CRET1, FORL_STEP*8(RA) // STEP CRET1 - CRET2 type + | gettp CARG4, CARG2 + | bne CARG3, TISNUM, >5 + |. gettp CRET2, CRET1 + | bne CARG4, TISNUM, ->vmeta_for + |. sextw CARG3, CARG1 + | bne CRET2, TISNUM, ->vmeta_for + |. sextw CARG2, CARG2 + | dext AT, CRET1, 31, 0 + | slt CRET1, CARG2, CARG3 + | slt TMP1, CARG3, CARG2 + | movn CRET1, TMP1, AT + } else { + | bne CARG3, TISNUM, >5 + |. ld CARG2, FORL_STEP*8(RA) // STEP CARG2 - CARG4 type + | ld CRET1, FORL_STOP*8(RA) // STOP CRET1 - CRET2 type + | sextw TMP3, CARG1 + | sextw CARG2, CARG2 + | sextw CRET1, CRET1 + | addu CARG1, TMP3, CARG2 + | xor TMP0, CARG1, TMP3 + | xor TMP1, CARG1, CARG2 + | and TMP0, TMP0, TMP1 + | slt TMP1, CARG1, CRET1 + | slt CRET1, CRET1, CARG1 + | slt AT, CARG2, r0 + | slt TMP0, TMP0, r0 // ((y^a) & (y^b)) < 0: overflow. + | movn CRET1, TMP1, AT + | or CRET1, CRET1, TMP0 + | zextw CARG1, CARG1 + | settp CARG1, TISNUM + } + |1: + if (op == BC_FORI) { + | movz TMP2, r0, CRET1 + | daddu PC, PC, TMP2 + } else if (op == BC_JFORI) { + | daddu PC, PC, TMP2 + | lhu RD, -4+OFS_RD(PC) + } else if (op == BC_IFORL) { + | movn TMP2, r0, CRET1 + | daddu PC, PC, TMP2 + } + if (vk) { + | sd CARG1, FORL_IDX*8(RA) + } + | ins_next1 + | sd CARG1, FORL_EXT*8(RA) + |2: + if (op == BC_JFORI) { + | beqz CRET1, =>BC_JLOOP + |. decode_RD8b RD + } else if (op == BC_JFORL) { + | beqz CRET1, =>BC_JLOOP + } + | ins_next2 + | + |5: // FP loop. + |.if FPU + if (!vk) { + | ldc1 f0, FORL_IDX*8(RA) + | ldc1 f2, FORL_STOP*8(RA) + | sltiu TMP0, CARG3, LJ_TISNUM + | sltiu TMP1, CARG4, LJ_TISNUM + | sltiu AT, CRET2, LJ_TISNUM + | ld TMP3, FORL_STEP*8(RA) + | and TMP0, TMP0, TMP1 + | and AT, AT, TMP0 + | beqz AT, ->vmeta_for + |. slt TMP3, TMP3, r0 + | c.ole.d 0, f0, f2 + | c.ole.d 1, f2, f0 + | li CRET1, 1 + | movt CRET1, r0, 0 + | movt AT, r0, 1 + | b <1 + |. movn CRET1, AT, TMP3 + } else { + | ldc1 f0, FORL_IDX*8(RA) + | ldc1 f4, FORL_STEP*8(RA) + | ldc1 f2, FORL_STOP*8(RA) + | ld TMP3, FORL_STEP*8(RA) + | add.d f0, f0, f4 + | c.ole.d 0, f0, f2 + | c.ole.d 1, f2, f0 + | slt TMP3, TMP3, r0 + | li CRET1, 1 + | li AT, 1 + | movt CRET1, r0, 0 + | movt AT, r0, 1 + | movn CRET1, AT, TMP3 + if (op == BC_IFORL) { + | movn TMP2, r0, CRET1 + | daddu PC, PC, TMP2 + } + | sdc1 f0, FORL_IDX*8(RA) + | ins_next1 + | b <2 + |. sdc1 f0, FORL_EXT*8(RA) + } + |.else + if (!vk) { + | sltiu TMP0, CARG3, LJ_TISNUM + | sltiu TMP1, CARG4, LJ_TISNUM + | sltiu AT, CRET2, LJ_TISNUM + | and TMP0, TMP0, TMP1 + | and AT, AT, TMP0 + | beqz AT, ->vmeta_for + |. nop + | bal ->vm_sfcmpolex + |. lw TMP3, FORL_STEP*8+HI(RA) + | b <1 + |. nop + } else { + | load_got __adddf3 + | call_extern + |. sw TMP2, TMPD + | ld CARG2, FORL_STOP*8(RA) + | move CARG1, CRET1 + if ( op == BC_JFORL ) { + | lhu RD, -4+OFS_RD(PC) + | decode_RD8b RD + } + | bal ->vm_sfcmpolex + |. lw TMP3, FORL_STEP*8+HI(RA) + | b <1 + |. lw TMP2, TMPD + } + |.endif + 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 + | daddu RA, BASE, RA + | ld TMP1, 0(RA) + | beq TMP1, TISNIL, >1 // Stop if iterator returned nil. + |. nop + if (op == BC_JITERL) { + | b =>BC_JLOOP + |. sd TMP1, -8(RA) + } else { + | branch_RD // Otherwise save control var + branch. + | sd TMP1, -8(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 + | // RA = base*8 (ignored), RD = traceno*8 + | ld TMP1, DISPATCH_J(trace)(DISPATCH) + | li AT, 0 + | daddu TMP1, TMP1, RD + | // Traces on MIPS don't store the trace number, so use 0. + | sd AT, DISPATCH_GL(vmstate)(DISPATCH) + | ld TRACE:TMP2, 0(TMP1) + | sd BASE, DISPATCH_GL(jit_base)(DISPATCH) + | ld TMP2, TRACE:TMP2->mcode + | sd L, DISPATCH_GL(tmpbuf.L)(DISPATCH) + | jr TMP2 + |. daddiu JGL, DISPATCH, GG_DISP2G+32768 + |.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 + | ld TMP2, L->maxstack + | lbu TMP1, -4+PC2PROTO(numparams)(PC) + | ld KBASE, -4+PC2PROTO(k)(PC) + | sltu AT, TMP2, RA + | bnez AT, ->vm_growstack_l + |. sll TMP1, TMP1, 3 + if (op != BC_JFUNCF) { + | ins_next1 + } + |2: + | sltu AT, NARGS8:RC, TMP1 // Check for missing parameters. + | bnez AT, >3 + |. daddu AT, BASE, NARGS8:RC + if (op == BC_JFUNCF) { + | decode_RD8a RD, INS + | b =>BC_JLOOP + |. decode_RD8b RD + } else { + | ins_next2 + } + | + |3: // Clear missing parameters. + | sd TISNIL, 0(AT) + | b <2 + |. addiu NARGS8:RC, NARGS8:RC, 8 + 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 + | li TMP0, LJ_TFUNC + | daddu TMP1, BASE, RC + | ld TMP2, L->maxstack + | settp LFUNC:RB, TMP0 + | daddu TMP0, RA, RC + | sd LFUNC:RB, 0(TMP1) // Store (tagged) copy of LFUNC. + | daddiu TMP3, RC, 16+FRAME_VARG + | sltu AT, TMP0, TMP2 + | ld KBASE, -4+PC2PROTO(k)(PC) + | beqz AT, ->vm_growstack_l + |. sd TMP3, 8(TMP1) // Store delta + FRAME_VARG. + | lbu TMP2, -4+PC2PROTO(numparams)(PC) + | move RA, BASE + | move RC, TMP1 + | ins_next1 + | beqz TMP2, >3 + |. daddiu BASE, TMP1, 16 + |1: + | ld TMP0, 0(RA) + | sltu AT, RA, RC // Less args than parameters? + | move CARG1, TMP0 + | movz TMP0, TISNIL, AT // Clear missing parameters. + | movn CARG1, TISNIL, AT // Clear old fixarg slot (help the GC). + | addiu TMP2, TMP2, -1 + | sd TMP0, 16(TMP1) + | daddiu TMP1, TMP1, 8 + | sd CARG1, 0(RA) + | bnez TMP2, <1 + |. daddiu RA, RA, 8 + |3: + | ins_next2 + break; + + case BC_FUNCC: + case BC_FUNCCW: + | // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8 + if (op == BC_FUNCC) { + | ld CFUNCADDR, CFUNC:RB->f + } else { + | ld CFUNCADDR, DISPATCH_GL(wrapf)(DISPATCH) + } + | daddu TMP1, RA, NARGS8:RC + | ld TMP2, L->maxstack + | daddu RC, BASE, NARGS8:RC + | sd BASE, L->base + | sltu AT, TMP2, TMP1 + | sd RC, L->top + | li_vmstate C + if (op == BC_FUNCCW) { + | ld CARG2, CFUNC:RB->f + } + | bnez AT, ->vm_growstack_c // Need to grow stack. + |. move CARG1, L + | jalr CFUNCADDR // (lua_State *L [, lua_CFunction f]) + |. st_vmstate + | // Returns nresults. + | ld BASE, L->base + | sll RD, CRET1, 3 + | ld TMP1, L->top + | li_vmstate INTERP + | ld PC, FRAME_PC(BASE) // Fetch PC of caller. + | dsubu RA, TMP1, RD // RA = L->top - nresults*8 + | sd L, DISPATCH_GL(cur_L)(DISPATCH) + | b ->vm_returnc + |. st_vmstate + 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 fcofs = (int)((uint8_t *)ctx->glob[GLOB_vm_ffi_call] - ctx->code); + int i; + switch (ctx->mode) { + case BUILD_elfasm: + fprintf(ctx->fp, "\t.section .debug_frame,\"\",@progbits\n"); + fprintf(ctx->fp, + ".Lframe0:\n" + "\t.4byte .LECIE0-.LSCIE0\n" + ".LSCIE0:\n" + "\t.4byte 0xffffffff\n" + "\t.byte 0x1\n" + "\t.string \"\"\n" + "\t.uleb128 0x1\n" + "\t.sleb128 -4\n" + "\t.byte 31\n" + "\t.byte 0xc\n\t.uleb128 29\n\t.uleb128 0\n" + "\t.align 2\n" + ".LECIE0:\n\n"); + fprintf(ctx->fp, + ".LSFDE0:\n" + "\t.4byte .LEFDE0-.LASFDE0\n" + ".LASFDE0:\n" + "\t.4byte .Lframe0\n" + "\t.8byte .Lbegin\n" + "\t.8byte %d\n" + "\t.byte 0xe\n\t.uleb128 %d\n" + "\t.byte 0x9f\n\t.sleb128 2*5\n" + "\t.byte 0x9e\n\t.sleb128 2*6\n", + fcofs, CFRAME_SIZE); + for (i = 23; i >= 16; i--) + fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+i, 2*(30-i)); +#if !LJ_SOFTFP + for (i = 31; i >= 24; i--) + fprintf(ctx->fp, "\t.byte %d\n\t.uleb128 %d\n", 0x80+32+i, 2*(46-i)); +#endif + fprintf(ctx->fp, + "\t.align 2\n" + ".LEFDE0:\n\n"); +#if LJ_HASFFI + fprintf(ctx->fp, + ".LSFDE1:\n" + "\t.4byte .LEFDE1-.LASFDE1\n" + ".LASFDE1:\n" + "\t.4byte .Lframe0\n" + "\t.4byte lj_vm_ffi_call\n" + "\t.4byte %d\n" + "\t.byte 0x9f\n\t.uleb128 2*1\n" + "\t.byte 0x90\n\t.uleb128 2*2\n" + "\t.byte 0xd\n\t.uleb128 0x10\n" + "\t.align 2\n" + ".LEFDE1:\n\n", (int)ctx->codesz - fcofs); +#endif +#if !LJ_NO_UNWIND + /* NYI */ +#endif + break; + default: + break; + } +} + |