80 lines
2.3 KiB
ArmAsm
80 lines
2.3 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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* int
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* wcscmp(const wchar_t *s1, const wchar_t *s2) --
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* Return an integer greater than, equal to, or less than 0, when
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* the string s1 is greater than, equal to, or less than the string s2.
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*/
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ENTRY(wcscmp)
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pushl %edi
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pushl %esi
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movl 12(%esp),%edi /* s1 */
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movl 16(%esp),%esi /* s2 */
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.p2align 4,0x90
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top: movl (%edi),%eax
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cmpl %eax,(%esi)
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jne no0
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testl %eax,%eax
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jz same
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movl 4(%edi),%eax
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cmpl %eax,4(%esi)
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jne no4
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testl %eax,%eax
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jz same
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movl 8(%edi),%eax
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cmpl %eax,8(%esi)
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jne no8
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testl %eax,%eax
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jz same
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movl 12(%edi),%eax
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cmpl %eax,12(%esi)
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jne no12
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leal 16(%edi),%edi
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leal 16(%esi),%esi
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testl %eax,%eax
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jnz top
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.p2align 2,0x90
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same: xorl %eax,%eax
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popl %esi
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popl %edi
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ret
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.p2align 2,0x90
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no12: leal 4(%esi),%esi
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.p2align 2,0x90
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no8: leal 4(%esi),%esi
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.p2align 2,0x90
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no4: leal 4(%esi),%esi
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.p2align 2,0x90
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no0: subl (%esi),%eax
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popl %esi
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popl %edi
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ret
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