diff options
Diffstat (limited to 'newlib/libc/machine/sh/memset.S')
| -rw-r--r-- | newlib/libc/machine/sh/memset.S | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/newlib/libc/machine/sh/memset.S b/newlib/libc/machine/sh/memset.S deleted file mode 100644 index 3d37e33e3..000000000 --- a/newlib/libc/machine/sh/memset.S +++ /dev/null @@ -1,142 +0,0 @@ -! -! Fast SH memset -! -! by Toshiyasu Morita (tm@netcom.com) -! -! SH5 code by J"orn Rennecke (joern.rennecke@superh.com) -! Copyright 2002 SuperH Ltd. -! - -#include "asm.h" - -ENTRY(memset) -#if __SHMEDIA__ - pta/l multiquad, tr0 - andi r2, 7, r22 - ptabs r18, tr2 - mshflo.b r3,r3,r3 - add r4, r22, r23 - mperm.w r3, r63, r3 // Fill pattern now in every byte of r3 - - movi 8, r9 - bgtu/u r23, r9, tr0 // multiquad - - ldlo.q r2, 0, r7 - shlli r4, 2, r4 - movi -1, r8 - SHHI r8, r4, r8 - SHHI r8, r4, r8 - mcmv r7, r8, r3 - stlo.q r2, 0, r3 - blink tr2, r63 - -multiquad: - pta/l lastquad, tr0 - stlo.q r2, 0, r3 - shlri r23, 3, r24 - add r2, r4, r5 - beqi/u r24, 1, tr0 // lastquad - pta/l loop, tr1 - sub r2, r22, r25 - andi r5, -8, r20 // calculate end address and - addi r20, -7*8, r8 // loop end address; This might overflow, so we need - // to use a different test before we start the loop - bge/u r24, r9, tr1 // loop - st.q r25, 8, r3 - st.q r20, -8, r3 - shlri r24, 1, r24 - beqi/u r24, 1, tr0 // lastquad - st.q r25, 16, r3 - st.q r20, -16, r3 - beqi/u r24, 2, tr0 // lastquad - st.q r25, 24, r3 - st.q r20, -24, r3 -lastquad: - sthi.q r5, -1, r3 - blink tr2,r63 - -loop: - alloco r25, 32 - st.q r25, 8, r3 - st.q r25, 16, r3 - st.q r25, 24, r3 - st.q r25, 32, r3 - addi r25, 32, r25 - bgeu/l r8, r25, tr1 // loop - - st.q r20, -40, r3 - st.q r20, -32, r3 - st.q r20, -24, r3 - st.q r20, -16, r3 - st.q r20, -8, r3 - sthi.q r5, -1, r3 - blink tr2,r63 -#else /* ! SHMEDIA, i.e. SH1 .. SH4 / SHcompact */ -! Entry: r4: destination pointer -! r5: fill value -! r6: byte count -! -! Exit: r0-r3: trashed -! - -! This assumes that the first four bytes of the address space (0..3) are -! reserved - usually by the linker script. Otherwise, we would had to check -! for the case of objects of the size 12..15 at address 0..3 . - -#ifdef __SH5__ -#define DST r2 -#define VAL r3 -#define CNT r4 -#define TMP r5 -#else -#define DST r4 -#define VAL r5 -#define CNT r6 -#define TMP r2 -#endif - - mov #12,r0 ! Check for small number of bytes - cmp/gt CNT,r0 - mov DST,r0 - SL(bt, L_store_byte_loop_check0, add DST,CNT) - - tst #3,r0 ! Align destination - SL(bt, L_dup_bytes, extu.b r5,r5) - .balignw 4,0x0009 -L_align_loop: - mov.b VAL,@r0 - add #1,r0 - tst #3,r0 - bf L_align_loop - -L_dup_bytes: - swap.b VAL,TMP ! Duplicate bytes across longword - or TMP,VAL - swap.w VAL,TMP - or TMP,VAL - - add #-16,CNT - - .balignw 4,0x0009 -L_store_long_loop: - mov.l VAL,@r0 ! Store double longs to memory - cmp/hs CNT,r0 - mov.l VAL,@(4,r0) - SL(bf, L_store_long_loop, add #8,r0) - - add #16,CNT - -L_store_byte_loop_check0: - cmp/eq CNT,r0 - bt L_exit - .balignw 4,0x0009 -L_store_byte_loop: - mov.b VAL,@r0 ! Store bytes to memory - add #1,r0 - cmp/eq CNT,r0 - bf L_store_byte_loop - -L_exit: - rts - mov r4,r0 -#endif /* ! SHMEDIA */ |