Return to bcmp.S CVS log | Up to [local] / sys / lib / libkern / arch / amd64 |
File: [local] / sys / lib / libkern / arch / amd64 / bcmp.S (download)
Revision 1.1, Tue Mar 4 16:15:11 2008 UTC (16 years, 6 months ago) by nbrk
Initial revision |
#include <machine/asm.h> #if defined(LIBC_SCCS) RCSID("$NetBSD: bcmp.S,v 1.1 2001/06/19 00:22:45 fvdl Exp $") #endif ENTRY(bcmp) xorl %eax,%eax /* clear return value */ cld /* set compare direction forward */ movq %rdx,%rcx /* compare by words */ shrq $3,%rcx repe cmpsq jne L1 movq %rdx,%rcx /* compare remainder by bytes */ andq $7,%rcx repe cmpsb je L2 L1: incl %eax L2: ret