Add i386 assembly versions of bcmp & memcmp
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jtc
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0837b9168a
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276bb25851
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/*
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* Copyright (c) 1993 Winning Strategies, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Winning Strategies, Inc.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "DEFS.h"
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/*
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* bcmp (void *b1, void *b2, size_t len)
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*
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* Written by:
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* J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
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*/
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/*
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* XXX should compare by words
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*/
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#include "DEFS.h"
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ENTRY(bcmp)
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pushl %edi
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pushl %esi
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movl 12(%esp),%edi
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movl 16(%esp),%esi
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movl 20(%esp),%ecx
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xorl %eax,%eax /* clear return value */
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cld /* set compare direction forward */
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repe /* compare! */
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cmpsb
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je L1 /* matches! */
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incl %eax
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L1: popl %esi
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popl %edi
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ret
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@ -0,0 +1,63 @@
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/*
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* Copyright (c) 1993 Winning Strategies, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Winning Strategies, Inc.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "DEFS.h"
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/*
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* memcmp (void *b1, void *b2, size_t len)
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*
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* Written by:
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* J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
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*/
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/*
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* XXX should compare by words
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*/
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#include "DEFS.h"
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ENTRY(memcmp)
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pushl %edi
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pushl %esi
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movl 12(%esp),%edi
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movl 16(%esp),%esi
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movl 20(%esp),%ecx
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xorl %eax,%eax /* clear return value */
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cld /* set compare direction forward */
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repe /* compare! */
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cmpsb
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je L1 /* matches! */
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movsbl -1(%edi),%eax /* unsigned comparison */
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movsbl -1(%esi),%edx
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subl %edx,%eax
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L1: popl %esi
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popl %edi
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ret
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@ -12,7 +12,7 @@ SRCS+= bcmp.s bcopy.s bzero.s ffs.s index.s memchr.c memcmp.c memset.c \
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strncat.c strncmp.s strncpy.s strpbrk.c strsep.c \
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strspn.c strstr.c
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.elif (${MACHINE} == "i386")
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SRCS+= bcmp.c bcopy.s bzero.s ffs.s index.s memchr.s memcmp.c memset.s \
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SRCS+= bcmp.s bcopy.s bzero.s ffs.s index.s memchr.s memcmp.s memset.s \
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rindex.s strcat.s strcmp.s strcpy.s strcspn.c strlen.s \
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strncat.c strncmp.s strncpy.c strpbrk.c strsep.c \
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strspn.c strstr.c
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