diff options
Diffstat (limited to 'newlib/libc/machine/m68k/memset.S')
| -rw-r--r-- | newlib/libc/machine/m68k/memset.S | 72 |
1 files changed, 35 insertions, 37 deletions
diff --git a/newlib/libc/machine/m68k/memset.S b/newlib/libc/machine/m68k/memset.S index 622cf014d..545bf7e7d 100644 --- a/newlib/libc/machine/m68k/memset.S +++ b/newlib/libc/machine/m68k/memset.S @@ -13,13 +13,11 @@ * they apply. */ -#include "m68kasm.h" - .text .align 4 - .globl SYM(memset) - .type SYM(memset), @function + .globl memset + .type memset, @function | memset, optimised | @@ -40,61 +38,61 @@ | | VG, April 2007 | -SYM(memset): - move.l 4(sp),a0 | dest ptr - move.l 8(sp),d0 | value - move.l 12(sp),d1 | len - cmp.l #16,d1 +memset: + move.l 4(%sp),%a0 | dest ptr + move.l 8(%sp),%d0 | value + move.l 12(%sp),%d1 | len + cmp.l #16,%d1 blo .Lbset | below, byte fills | - move.l d2,-(sp) | need a register - move.b d0,d2 | distribute low byte to all byte in word - lsl.l #8,d0 - move.b d2,d0 - move.w d0,d2 - swap d0 | rotate 16 - move.w d2,d0 + move.l %d2,-(%sp) | need a register + move.b %d0,%d2 | distribute low byte to all byte in word + lsl.l #8,%d0 + move.b %d2,%d0 + move.w %d0,%d2 + swap %d0 | rotate 16 + move.w %d2,%d0 | - move.l a0,d2 | copy of src - neg.l d2 | 1 2 3 ==> 3 2 1 - and.l #3,d2 + move.l %a0,%d2 | copy of src + neg.l %d2 | 1 2 3 ==> 3 2 1 + and.l #3,%d2 beq 2f | is aligned | - sub.l d2,d1 | fix length - lsr.l #1,d2 | word align needed? + sub.l %d2,%d1 | fix length + lsr.l #1,%d2 | word align needed? bcc 1f - move.b d0,(a0)+ | fill byte + move.b %d0,(%a0)+ | fill byte 1: - lsr.l #1,d2 | long align needed? + lsr.l #1,%d2 | long align needed? bcc 2f - move.w d0,(a0)+ | fill word + move.w %d0,(%a0)+ | fill word 2: - move.l d1,d2 | number of long transfers (at least 3) - lsr.l #2,d2 - subq.l #1,d2 + move.l %d1,%d2 | number of long transfers (at least 3) + lsr.l #2,%d2 + subq.l #1,%d2 1: - move.l d0,(a0)+ | fill long words + move.l %d0,(%a0)+ | fill long words .Llset: #if !defined (__mcoldfire__) - dbra d2,1b | loop until done - sub.l #0x10000,d2 + dbra %d2,1b | loop until done + sub.l #0x10000,%d2 #else - subq.l #1,d2 + subq.l #1,%d2 #endif bpl 1b - and.l #3,d1 | residue byte transfers, fixed - move.l (sp)+,d2 | restore d2 + and.l #3,%d1 | residue byte transfers, fixed + move.l (%sp)+,%d2 | restore d2 bra .Lbset 1: - move.b d0,(a0)+ | fill residue bytes + move.b %d0,(%a0)+ | fill residue bytes .Lbset: #if !defined (__mcoldfire__) - dbra d1,1b | loop until done + dbra %d1,1b | loop until done #else - subq.l #1,d1 + subq.l #1,%d1 bpl 1b #endif - move.l 4(sp),d0 | return value + move.l 4(%sp),%d0 | return value rts |