author | Mark J. Nelson <Mark.J.Nelson@Sun.COM> |
Wed, 06 Aug 2008 16:29:39 -0600 | |
changeset 7298 | b69e27387f74 |
parent 6812 | febeba71273d |
permissions | -rw-r--r-- |
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/* |
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* CDDL HEADER START |
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* |
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* The contents of this file are subject to the terms of the |
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* Common Development and Distribution License (the "License"). |
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* You may not use this file except in compliance with the License. |
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* |
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
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* or http://www.opensolaris.org/os/licensing. |
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* See the License for the specific language governing permissions |
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* and limitations under the License. |
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* |
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* When distributing Covered Code, include this CDDL HEADER in each |
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
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* If applicable, add the following below this CDDL HEADER, with the |
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* fields enclosed by brackets "[]" replaced with your own identifying |
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* information: Portions Copyright [yyyy] [name of copyright owner] |
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* |
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* CDDL HEADER END |
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*/ |
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/* |
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* Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
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* Use is subject to license terms. |
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*/ |
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||
7298
b69e27387f74
6733918 Teamware has retired, please welcome your new manager, Mercurial
Mark J. Nelson <Mark.J.Nelson@Sun.COM>
parents:
6812
diff
changeset
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.file "wsncmp.s" |
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/ |
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/ Wide character wcsncpy() implementation |
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/ |
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/ Algorithm based on Solaris 2.6 gen/strncpy.s implementation |
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/ |
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#include "SYS.h" |
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ANSI_PRAGMA_WEAK(wcsncmp,function) |
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ANSI_PRAGMA_WEAK(wsncmp,function) |
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ENTRY(wcsncmp) |
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pushl %esi / save register variables |
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movl 8(%esp),%esi / %esi = first string |
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movl %edi,%edx |
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movl 12(%esp),%edi / %edi = second string |
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cmpl %esi,%edi / same string? |
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je .equal |
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movl 16(%esp),%ecx / %ecx = length |
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incl %ecx / will later predecrement this uint |
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.loop: |
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decl %ecx |
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je .equal / Used all n chars? |
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movl (%esi),%eax / slodb ; scab |
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cmpl (%edi),%eax |
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jne .notequal_0 / Are the bytes equal? |
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testl %eax,%eax |
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je .equal / End of string? |
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decl %ecx |
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je .equal / Used all n chars? |
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movl 4(%esi),%eax / slodb ; scab |
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cmpl 4(%edi),%eax |
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jne .notequal_1 / Are the bytes equal? |
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testl %eax,%eax |
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je .equal / End of string? |
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decl %ecx |
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je .equal / Used all n chars? |
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movl 8(%esi),%eax / slodb ; scab |
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cmpl 8(%edi),%eax |
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jne .notequal_2 / Are the bytes equal? |
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testl %eax,%eax |
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je .equal / End of string? |
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decl %ecx |
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je .equal / Used all n chars? |
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movl 12(%esi),%eax / slodb ; scab |
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cmpl 12(%edi),%eax |
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jne .notequal_3 / Are the bytes equal? |
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addl $16,%esi |
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addl $16,%edi |
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testl %eax,%eax |
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jne .loop / End of string? |
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.equal: |
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popl %esi / restore registers |
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xorl %eax,%eax / return 0 |
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movl %edx,%edi |
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ret |
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.align 4 |
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.notequal_3: |
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addl $4,%edi |
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.notequal_2: |
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addl $4,%edi |
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.notequal_1: |
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addl $4,%edi |
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.notequal_0: |
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popl %esi / restore registers |
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subl (%edi),%eax / return value is (*s1 - *--s2) |
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movl %edx,%edi |
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ret |
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SET_SIZE(wcsncmp) |
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ENTRY(wsncmp) |
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_prologue_ |
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movl _esp_(12),%ecx |
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movl _esp_(8),%eax |
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movl _esp_(4),%edx |
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pushl %ecx |
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pushl %eax |
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pushl %edx |
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call _fref_(wcsncmp) |
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addl $12,%esp |
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_epilogue_ |
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ret |
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SET_SIZE(wsncmp) |