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

1.1     ! nbrk        1: /*     $OpenBSD: ffs.S,v 1.2 1996/09/27 06:47:45 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(ffs)
        !            11:        bsfl    4(%esp),%eax
        !            12:        jz      L1                      /* ZF is set if all bits are 0 */
        !            13:        incl    %eax                    /* bits numbered from 1, not 0 */
        !            14:        ret
        !            15:
        !            16:        .align 2
        !            17: L1:    xorl    %eax,%eax               /* clear result */
        !            18:        ret