24 lines
547 B
ArmAsm
24 lines
547 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: strlen.S,v 1.6 1995/04/28 22:58:13 jtc Exp $")
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#endif
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ENTRY(strlen)
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pushl %edi
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movl 8(%esp),%edi /* string address */
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cld /* set search forward */
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xorl %eax,%eax /* set search for null terminator */
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movl $-1,%ecx /* set search for lots of characters */
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repne /* search! */
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scasb
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notl %ecx /* get length by taking complement */
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leal -1(%ecx),%eax /* and subtracting one */
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popl %edi
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ret
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