/* $OpenBSD: strcpy.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.strcpy .ascii "warning: strcpy() is almost always misused, please use strlcpy()" #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(strcpy) movl 4(%esp),%ecx /* dst address */ movl 8(%esp),%edx /* src address */ pushl %ecx /* push 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 dst address */ ret