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Annotation of sys/lib/libkern/arch/amd64/bcmp.S, Revision 1.1.1.1

1.1       nbrk        1: #include <machine/asm.h>
                      2:
                      3: #if defined(LIBC_SCCS)
                      4:        RCSID("$NetBSD: bcmp.S,v 1.1 2001/06/19 00:22:45 fvdl Exp $")
                      5: #endif
                      6:
                      7: ENTRY(bcmp)
                      8:        xorl    %eax,%eax               /* clear return value */
                      9:        cld                             /* set compare direction forward */
                     10:
                     11:        movq    %rdx,%rcx               /* compare by words */
                     12:        shrq    $3,%rcx
                     13:        repe
                     14:        cmpsq
                     15:        jne     L1
                     16:
                     17:        movq    %rdx,%rcx               /* compare remainder by bytes */
                     18:        andq    $7,%rcx
                     19:        repe
                     20:        cmpsb
                     21:        je      L2
                     22:
                     23: L1:    incl    %eax
                     24: L2:    ret