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Annotation of sys/lib/libkern/arch/amd64/rindex.S, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Written by J.T. Conklin <jtc@netbsd.org>.
        !             3:  * Public domain.
        !             4:  * Adapted for NetBSD/x86_64 by Frank van der Linden <fvdl@wasabisystems.com>
        !             5:  */
        !             6:
        !             7: #include <machine/asm.h>
        !             8:
        !             9: #if defined(LIBC_SCCS)
        !            10:        RCSID("$NetBSD: rindex.S,v 1.1 2001/06/19 00:22:47 fvdl Exp $")
        !            11: #endif
        !            12:
        !            13: #ifdef STRRCHR
        !            14: ENTRY(strrchr)
        !            15: #else
        !            16: ENTRY(rindex)
        !            17: #endif
        !            18:        movb    %sil,%cl
        !            19:        xorq    %rax,%rax               /* init pointer to null */
        !            20: L1:
        !            21:        movb    (%rdi),%dl
        !            22:        cmpb    %dl,%cl
        !            23:        jne     L2
        !            24:        movq    %rdi,%rax
        !            25: L2:
        !            26:        incq    %rdi
        !            27:        testb   %dl,%dl                 /* null terminator??? */
        !            28:        jnz     L1
        !            29:        ret