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/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
* Adapted for NetBSD/x86_64 by Frank van der Linden <fvdl@wasabisystems.com>
*/
#include <machine/asm.h>
ENTRY(ffs)
RETGUARD_SETUP(ffs, r11)
bsfl %edi,%eax
jz L1 /* ZF is set if all bits are 0 */
incl %eax /* bits numbered from 1, not 0 */
jmp L2
_ALIGN_TRAPS
L1: xorl %eax,%eax /* clear result */
L2: RETGUARD_CHECK(ffs, r11)
ret
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