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[src/trunk]: src/common/lib/libc/arch x86 uses the C versions of bcmp() and m...
details: https://anonhg.NetBSD.org/src/rev/144f17b1bd12
branches: trunk
changeset: 848397:144f17b1bd12
user: ad <ad%NetBSD.org@localhost>
date: Mon Jan 27 22:09:21 2020 +0000
description:
x86 uses the C versions of bcmp() and memcmp() now.
diffstat:
common/lib/libc/arch/i386/string/memcmp.S | 48 --------------------
common/lib/libc/arch/x86_64/string/bcmp.S | 67 -----------------------------
common/lib/libc/arch/x86_64/string/memcmp.S | 40 -----------------
3 files changed, 0 insertions(+), 155 deletions(-)
diffs (167 lines):
diff -r 3d5d88e96272 -r 144f17b1bd12 common/lib/libc/arch/i386/string/memcmp.S
--- a/common/lib/libc/arch/i386/string/memcmp.S Mon Jan 27 22:08:08 2020 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,48 +0,0 @@
-/*
- * Written by J.T. Conklin <jtc%NetBSD.org@localhost>.
- * Public domain.
- */
-
-#include <machine/asm.h>
-
-#if defined(LIBC_SCCS)
- RCSID("$NetBSD: memcmp.S,v 1.3 2014/03/22 19:38:46 jakllsch Exp $")
-#endif
-
-ENTRY(memcmp)
- pushl %edi
- pushl %esi
- movl 12(%esp),%edi
- movl 16(%esp),%esi
-
- movl 20(%esp),%ecx /* compare by words */
- shrl $2,%ecx
- repe
- cmpsl
- jne L5 /* do we match so far? */
-
- movl 20(%esp),%ecx /* compare remainder by bytes */
- andl $3,%ecx
- repe
- cmpsb
- jne L6 /* do we match? */
-
- xorl %eax,%eax /* we match, return zero */
- popl %esi
- popl %edi
- ret
-
-L5: movl $4,%ecx /* We know that one of the next */
- subl %ecx,%edi /* four pairs of bytes do not */
- subl %ecx,%esi /* match. */
- repe
- cmpsb
-L6: xorl %eax,%eax /* Perform unsigned comparison */
- movb -1(%edi),%al
- xorl %edx,%edx
- movb -1(%esi),%dl
- subl %edx,%eax
- popl %esi
- popl %edi
- ret
-END(memcmp)
diff -r 3d5d88e96272 -r 144f17b1bd12 common/lib/libc/arch/x86_64/string/bcmp.S
--- a/common/lib/libc/arch/x86_64/string/bcmp.S Mon Jan 27 22:08:08 2020 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,67 +0,0 @@
-/* $NetBSD: bcmp.S,v 1.4 2020/01/15 10:56:49 ad Exp $ */
-
-/*-
- * Copyright (c) 2020 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Andrew Doran.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <machine/asm.h>
-
-#if defined(LIBC_SCCS)
- RCSID("$NetBSD: bcmp.S,v 1.4 2020/01/15 10:56:49 ad Exp $")
-#endif
-
-ENTRY(bcmp)
- movq %rdx, %rcx /* compare by longs, equality only */
- shrq $3, %rcx
- jz 2f
-1:
- movq (%rdi), %rax
- cmpq %rax, (%rsi)
- jne 5f
- decq %rcx
- leaq 8(%rdi), %rdi
- leaq 8(%rsi), %rsi
- jnz 1b
-2:
- andl $7, %edx
- jz 4f
-3:
- movb (%rdi), %al /* compare by chars, equality only */
- cmpb %al, (%rsi)
- jne 5f
- decl %edx
- leaq 1(%rdi), %rdi
- leaq 1(%rsi), %rsi
- jnz 3b
-4:
- xorl %eax, %eax
- ret
-5:
- movl $1, %eax
- ret
-END(bcmp)
diff -r 3d5d88e96272 -r 144f17b1bd12 common/lib/libc/arch/x86_64/string/memcmp.S
--- a/common/lib/libc/arch/x86_64/string/memcmp.S Mon Jan 27 22:08:08 2020 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,40 +0,0 @@
-/*
- * Written by J.T. Conklin <jtc%NetBSD.org@localhost>.
- * Public domain.
- * Adapted for NetBSD/x86_64 by Frank van der Linden <fvdl%wasabisystems.com@localhost>
- */
-
-#include <machine/asm.h>
-
-#if defined(LIBC_SCCS)
- RCSID("$NetBSD: memcmp.S,v 1.5 2020/01/16 09:23:43 ad Exp $")
-#endif
-
-ENTRY(memcmp)
- movq %rdx,%rcx /* compare by longs */
- shrq $3,%rcx
- repe
- cmpsq
- jne L5 /* do we match so far? */
-
- movq %rdx,%rcx /* compare remainder by bytes */
- andq $7,%rcx
- repe
- cmpsb
- jne L6 /* do we match? */
-
- xorl %eax,%eax /* we match, return zero */
- ret
-
-L5: movl $8,%ecx /* We know that one of the next */
- subq %rcx,%rdi /* eight pairs of bytes do not */
- subq %rcx,%rsi /* match. */
- repe
- cmpsb
-L6: xorl %eax,%eax /* Perform unsigned comparison */
- movb -1(%rdi),%al
- xorl %edx,%edx
- movb -1(%rsi),%dl
- subl %edx,%eax
- ret
-END(memcmp)
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