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amd64: remove bcmp.S

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Fixes:  5fc3cc2713 ("amd64: make bcmp in libc just call memcmp")
This commit is contained in:
Mateusz Guzik 2022-03-25 14:54:55 +00:00
parent ff39d74aa9
commit f0f0f2abf3
1 changed files with 0 additions and 121 deletions
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121
lib/libc/amd64/string/bcmp.S
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@ -1,121 +0,0 @@
/*-
* Copyright (c) 2018 The FreeBSD Foundation
*
* This software was developed by Mateusz Guzik <mjg@FreeBSD.org>
* under sponsorship from the FreeBSD Foundation.
*
* 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
ENTRY(bcmp)
cmpq $16,%rdx
jae 5f
1:
testq %rdx,%rdx
je 3f
xorl %ecx,%ecx
2:
movzbl (%rdi,%rcx,1),%eax
movzbl (%rsi,%rcx,1),%r8d
cmpb %r8b,%al
jne 4f
addq $1,%rcx
cmpq %rcx,%rdx
jz 3f
movzbl (%rdi,%rcx,1),%eax
movzbl (%rsi,%rcx,1),%r8d
cmpb %r8b,%al
jne 4f
addq $1,%rcx
cmpq %rcx,%rdx
jz 3f
movzbl (%rdi,%rcx,1),%eax
movzbl (%rsi,%rcx,1),%r8d
cmpb %r8b,%al
jne 4f
addq $1,%rcx
cmpq %rcx,%rdx
jz 3f
movzbl (%rdi,%rcx,1),%eax
movzbl (%rsi,%rcx,1),%r8d
cmpb %r8b,%al
jne 4f
addq $1,%rcx
cmpq %rcx,%rdx
jne 2b
3:
xorl %eax,%eax
ret
4:
movl $1,%eax
ret
5:
cmpq $32,%rdx
jae 7f
6:
/*
* 8 bytes
*/
movq (%rdi),%r8
movq (%rsi),%r9
cmpq %r8,%r9
jne 4b
leaq 8(%rdi),%rdi
leaq 8(%rsi),%rsi
subq $8,%rdx
cmpq $8,%rdx
jae 6b
jl 1b
jmp 3b
7:
/*
* 32 bytes
*/
movq (%rsi),%r8
movq 8(%rsi),%r9
subq (%rdi),%r8
subq 8(%rdi),%r9
or %r8,%r9
jnz 4b
movq 16(%rsi),%r8
movq 24(%rsi),%r9
subq 16(%rdi),%r8
subq 24(%rdi),%r9
or %r8,%r9
jnz 4b
leaq 32(%rdi),%rdi
leaq 32(%rsi),%rsi
subq $32,%rdx
cmpq $32,%rdx
jae 7b
jnz 1b
jmp 3b
END(bcmp)
.section .note.GNU-stack,"",%progbits