diff options
Diffstat (limited to 'newlib/libc/machine/i386/memchr.S')
| -rw-r--r-- | newlib/libc/machine/i386/memchr.S | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/newlib/libc/machine/i386/memchr.S b/newlib/libc/machine/i386/memchr.S deleted file mode 100644 index 7639685be..000000000 --- a/newlib/libc/machine/i386/memchr.S +++ /dev/null @@ -1,114 +0,0 @@ -/* - * ==================================================== - * Copyright (C) 1998, 2002, 2008 by Red Hat Inc. 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 (memchr) - SOTYPE_FUNCTION(memchr) - -SYM (memchr): - pushl ebp - movl esp,ebp - pushl edi - movzbl 12(ebp),eax - movl 16(ebp),ecx - movl 8(ebp),edi - - xorl edx,edx - testl ecx,ecx - jz L20 - -#ifdef __OPTIMIZE_SIZE__ - - cld - repnz - scasb - - setnz dl - decl edi - -#else /* !__OPTIMIZE_SIZE__ */ -/* Do byte-wise checks until string is aligned. */ - testl $3,edi - je L5 - cmpb (edi),al - je L15 - incl edi - decl ecx - je L20 - - testl $3,edi - je L5 - cmpb (edi),al - je L15 - incl edi - decl ecx - je L20 - - testl $3,edi - je L5 - cmpb (edi),al - je L15 - incl edi - decl ecx - je L20 - -/* Create a mask, then check a word at a time. */ -L5: - movb al,ah - movl eax,edx - sall $16,edx - orl edx,eax - pushl ebx - - .p2align 4,,7 -L8: - subl $4,ecx - jc L9 - movl (edi),edx - addl $4,edi - xorl eax,edx - leal -16843009(edx),ebx - notl edx - andl edx,ebx - testl $-2139062144,ebx - je L8 - - subl $4,edi - -L9: - popl ebx - xorl edx,edx - addl $4,ecx - je L20 - -/* Final byte-wise checks. */ - .p2align 4,,7 -L10: - cmpb (edi),al - je L15 - incl edi - decl ecx - jne L10 - - xorl edi,edi - -#endif /* !__OPTIMIZE_SIZE__ */ - -L15: - decl edx - andl edi,edx -L20: - movl edx,eax - - leal -4(ebp),esp - popl edi - leave - ret |