69 lines
2.0 KiB
ArmAsm
69 lines
2.0 KiB
ArmAsm
/*-
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* Copyright (c) 2003 Tim J. Robbins.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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/*
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* size_t
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* wcslen(const wchar_t *s) --
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* Find the length of a wide character string.
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*/
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ENTRY(wcslen)
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movl 4(%esp),%ecx /* String */
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pushl %ebx
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xorl %ebx,%ebx
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xorl %eax,%eax
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.p2align 4,0x90
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L1: cmpl %ebx,(%ecx)
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jz found0
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cmpl %ebx,4(%ecx)
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jz found1
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cmpl %ebx,8(%ecx)
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jz found2
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cmpl %ebx,12(%ecx)
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jz found3
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cmpl %ebx,16(%ecx)
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jz found4
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cmpl %ebx,20(%ecx)
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jz found5
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cmpl %ebx,24(%ecx)
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jz found6
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cmpl %ebx,28(%ecx)
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jz found7
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leal 32(%ecx),%ecx
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addl $8,%eax
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jmp L1
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found7: incl %eax
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found6: incl %eax
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found5: incl %eax
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found4: incl %eax
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found3: incl %eax
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found2: incl %eax
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found1: incl %eax
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found0: popl %ebx
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ret
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