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[ARM] Adjust strcmp-armv7.S selection logic. 

Reformulate the strcmp-armv7.S selection logic around the architecture
features required by the implementation code rather (some) version of
the architecture that expose those features.
This commit is contained in:
Marcus Shawcroft 2015-11-13 13:53:38 +00:00
parent dc38827570
commit 8e62ab4ccc
4 changed files with 40 additions and 3 deletions
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5
newlib/ChangeLog
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@ -1,3 +1,8 @@
2015-11-23 Marcus Shawcroft <marcus.shawcroft@arm.com>
* libc/machine/arm/strlen-stub.c: Adjust strlen-armv7.S selection logic.
* libc/machine/arm/strlen.S: Likewise.
2015-11-23 Marcus Shawcroft <marcus.shawcroft@arm.com>
* libc/machine/arm/strlen-stub.c: Move T2 -O2 implementation to...

34
newlib/libc/machine/arm/strlen-armv7.S
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@ -29,9 +29,35 @@
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Assumes:
ARMv6T2, AArch32
ARMv6T2 or ARMv7E-M, AArch32
*/
/* Copyright (c) 2015 ARM Ltd.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* 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.
* Neither the name of the Linaro nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
HOLDER 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 "arm_asm.h"
.macro def_fn f p2align=0
@ -51,6 +77,12 @@
#endif
/* This code requires Thumb. */
#if __ARM_ARCH_PROFILE == 'M'
.arch armv7e-m
#else
.arch armv6t2
#endif
.eabi_attribute Tag_ARM_ISA_use, 0
.thumb
.syntax unified

2
newlib/libc/machine/arm/strlen-stub.c
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@ -44,7 +44,7 @@
#if defined __thumb__ && ! defined __thumb2__
#include "../../string/strlen.c"
#elif (__ARM_ARCH >= 7 && defined __ARM_ARCH_ISA_ARM) || defined __ARM_ARCH_6T2__
#elif __ARM_ARCH_ISA_THUMB >= 2 && defined __ARM_FEATURE_DSP
/* Implemented in strlen.S. */
#else

2
newlib/libc/machine/arm/strlen.S
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@ -39,7 +39,7 @@
#if defined __thumb__ && ! defined __thumb2__
/* Implemented in strlen-stub.c. */
#elif (__ARM_ARCH >= 7 && defined __ARM_ARCH_ISA_ARM) || defined __ARM_ARCH_6T2__
#elif __ARM_ARCH_ISA_THUMB >= 2 && defined __ARM_FEATURE_DSP
#include "strlen-armv7.S"
#else