21 lines
370 B
ArmAsm
21 lines
370 B
ArmAsm
/*
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* Written by J.T. Conklin <jtc@netbsd.org>.
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* Public domain.
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*/
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#include <machine/asm.h>
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#if defined(LIBC_SCCS)
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RCSID("$NetBSD: ffs.S,v 1.7 1995/04/28 22:58:00 jtc Exp $")
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#endif
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ENTRY(ffs)
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bsfl 4(%esp),%eax
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jz L1 /* ZF is set if all bits are 0 */
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incl %eax /* bits numbered from 1, not 0 */
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ret
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.align 2
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L1: xorl %eax,%eax /* clear result */
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ret
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