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git://sourceware.org/git/newlib-cygwin.git
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d18f1fc8a3
The patch cleans up the auto configury mechanism used to select different implementations of memchr for various architecture versions. The approach here is to remove the selection of memchr within automake and instead use complimentary logic in memchr-stub.c and memchr.S to choose between the gerneric memchr.c implementation or one of the architecture specific implementations. This patch also changes the selection criteria inline with the previous proposal here: https://sourceware.org/ml/newlib/2015/msg00752.html but using the ACLE predefines. Regressed for armv7-a armv5 armv8-a, correct selection of memcpy implementation by manual inspection of a test program built for these three architectures.
37 lines
1.8 KiB
C
37 lines
1.8 KiB
C
/* Copyright (c) 2015 ARM Ltd.
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All rights reserved.
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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 are met:
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* 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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* 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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* Neither the name of the Linaro nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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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
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* The structure of the following #if #else #endif conditional chain
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must match the chain in memchr.S. */
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#include "acle-compat.h"
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#if __ARM_ARCH_ISA_THUMB >= 2 && defined (__ARM_FEATURE_DSP)
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/* Defined in memchr.S. */
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#else
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# include "../../string/memchr.c"
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#endif
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