diff options
Diffstat (limited to 'newlib/libc/machine/i386/memcmp.S')
| -rw-r--r-- | newlib/libc/machine/i386/memcmp.S | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/newlib/libc/machine/i386/memcmp.S b/newlib/libc/machine/i386/memcmp.S deleted file mode 100644 index a8589c095..000000000 --- a/newlib/libc/machine/i386/memcmp.S +++ /dev/null @@ -1,76 +0,0 @@ -/* - * ==================================================== - * Copyright (C) 1998 by Cygnus Solutions. All rights reserved. - * - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - - #include "i386mach.h" - - .global SYM (memcmp) - SOTYPE_FUNCTION(memcmp) - -SYM (memcmp): - - pushl ebp - movl esp,ebp - subl $16,esp - pushl ebx - pushl edi - pushl esi - movl 8(ebp),edi - movl 12(ebp),esi - movl 16(ebp),ecx - cld - -/* check if length is zero in which case just return 0 */ - - xorl eax,eax - testl ecx,ecx - jz L4 - -#ifndef __OPTIMIZE_SIZE__ - -/* if aligned on long boundary, compare doublewords at a time first */ - - movl edi,eax - orl esi,eax - testb $3,al - jne BYTECMP - movl ecx,ebx - shrl $2,ecx /* calculate number of long words to compare */ - repz - cmpsl - jz L5 - subl $4,esi - subl $4,edi - movl $4,ecx - jmp BYTECMP -L5: - andl $3,ebx /* calculate number of remaining bytes */ - movl ebx,ecx - -#endif /* not __OPTIMIZE_SIZE__ */ - -BYTECMP: /* compare any unaligned bytes or remainder bytes */ - repz - cmpsb - -/* set output to be < 0 if less than, 0 if equal, or > 0 if greater than */ -L3: - xorl edx,edx - movb -1(esi),dl - xorl eax,eax - movb -1(edi),al - subl edx,eax - -L4: - leal -28(ebp),esp - popl esi - popl edi - popl ebx - leave - ret |