77 lines
2.2 KiB
ArmAsm
77 lines
2.2 KiB
ArmAsm
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/*-
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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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* wchar_t *
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* wcschr(const wchar_t *s, wchar_t c) --
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* Return pointer to first occurrence of the character `c' in the wide
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* character string `s', or NULL if not found.
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*/
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ENTRY(wcschr)
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movl 4(%esp),%ecx /* String */
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movl 8(%esp),%eax /* Character */
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pushl %ebx
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.p2align 4,0x90
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L1: movl (%ecx),%ebx
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cmpl %eax,%ebx
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je found0
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testl %ebx,%ebx
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jz no
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movl 4(%ecx),%ebx
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cmpl %eax,%ebx
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je found1
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testl %ebx,%ebx
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jz no
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movl 8(%ecx),%ebx
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cmpl %eax,%ebx
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je found2
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testl %ebx,%ebx
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jz no
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movl 12(%ecx),%ebx
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cmpl %eax,%ebx
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je found3
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testl %ebx,%ebx
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jz no
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leal 16(%ecx),%ecx
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jmp L1
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.p2align 2,0x90
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found3: leal 4(%ecx),%ecx
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.p2align 2,0x90
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found2: leal 4(%ecx),%ecx
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.p2align 2,0x90
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found1: leal 4(%ecx),%ecx
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.p2align 2,0x90
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found0: popl %ebx
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movl %ecx,%eax
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ret
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.p2align 2,0x90
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no: popl %ebx
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xorl %eax,%eax
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ret
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