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Annotation of sys/lib/libkern/arch/i386/bcmp.S, Revision 1.1.1.1

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