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Annotation of sys/lib/libkern/arch/i386/bcmp.S, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: bcmp.S,v 1.2 1996/09/27 06:47:44 mickey Exp $ */
        !             2:
        !             3: /*
        !             4:  * Written by J.T. Conklin <jtc@netbsd.org>.
        !             5:  * Public domain.
        !             6:  */
        !             7:
        !             8: #include <machine/asm.h>
        !             9:
        !            10: ENTRY(bcmp)
        !            11:        pushl   %edi
        !            12:        pushl   %esi
        !            13:        movl    12(%esp),%edi
        !            14:        movl    16(%esp),%esi
        !            15:        xorl    %eax,%eax               /* clear return value */
        !            16:        cld                             /* set compare direction forward */
        !            17:
        !            18:        movl    20(%esp),%ecx           /* compare by words */
        !            19:        shrl    $2,%ecx
        !            20:        repe
        !            21:        cmpsl
        !            22:        jne     L1
        !            23:
        !            24:        movl    20(%esp),%ecx           /* compare remainder by bytes */
        !            25:        andl    $3,%ecx
        !            26:        repe
        !            27:        cmpsb
        !            28:        je      L2
        !            29:
        !            30: L1:    incl    %eax
        !            31: L2:    popl    %esi
        !            32:        popl    %edi
        !            33:        ret