diff options
Diffstat (limited to 'libc/arch-x86/string/strcat.S')
| -rw-r--r-- | libc/arch-x86/string/strcat.S | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/libc/arch-x86/string/strcat.S b/libc/arch-x86/string/strcat.S deleted file mode 100644 index 60fdd55..0000000 --- a/libc/arch-x86/string/strcat.S +++ /dev/null @@ -1,73 +0,0 @@ -/* $OpenBSD: strcat.S,v 1.8 2005/08/07 11:30:38 espie Exp $ */ -/* - * Written by J.T. Conklin <jtc@netbsd.org>. - * Public domain. - */ - -#include <machine/asm.h> - -#if defined(APIWARN) -#APP - .section .gnu.warning.strcat - .ascii "warning: strcat() is almost always misused, please use strlcat()" -#NO_APP -#endif - -/* - * NOTE: I've unrolled the loop eight times: large enough to make a - * significant difference, and small enough not to totally trash the - * cache. - */ - -ENTRY(strcat) - pushl %edi /* save edi */ - movl 8(%esp),%edi /* dst address */ - movl 12(%esp),%edx /* src address */ - pushl %edi /* push destination address */ - - cld /* set search forward */ - xorl %eax,%eax /* set search for null terminator */ - movl $-1,%ecx /* set search for lots of characters */ - repne /* search! */ - scasb - - leal -1(%edi),%ecx /* correct dst address */ - - .align 2,0x90 -L1: movb (%edx),%al /* unroll loop, but not too much */ - movb %al,(%ecx) - testb %al,%al - jz L2 - movb 1(%edx),%al - movb %al,1(%ecx) - testb %al,%al - jz L2 - movb 2(%edx),%al - movb %al,2(%ecx) - testb %al,%al - jz L2 - movb 3(%edx),%al - movb %al,3(%ecx) - testb %al,%al - jz L2 - movb 4(%edx),%al - movb %al,4(%ecx) - testb %al,%al - jz L2 - movb 5(%edx),%al - movb %al,5(%ecx) - testb %al,%al - jz L2 - movb 6(%edx),%al - movb %al,6(%ecx) - testb %al,%al - jz L2 - movb 7(%edx),%al - movb %al,7(%ecx) - addl $8,%edx - addl $8,%ecx - testb %al,%al - jnz L1 -L2: popl %eax /* pop destination address */ - popl %edi /* restore edi */ - ret |