84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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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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* * 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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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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
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ARM_MACHINE_CPU_FEATURES_H
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#define _ARM_MACHINE_CPU_FEATURES_H
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/* The purpose of this file is to define several macros corresponding
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* to CPU features that may or may not be available at build time on
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* on the target CPU.
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*
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* This is done to abstract us from the various ARM Architecture
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* quirks and alphabet soup.
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*/
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/* __ARM_ARCH__ is a number corresponding to the ARM revision
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* we're going to support. Our toolchain doesn't define __ARM_ARCH__
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* so try to guess it.
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*/
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#ifndef __ARM_ARCH__
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# if defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ || \
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defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
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# define __ARM_ARCH__ 7
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# elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ || \
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defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6Z__ || \
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defined __ARM_ARCH_6KZ__ || defined __ARM_ARCH_6T2__
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# define __ARM_ARCH__ 6
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# else
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# error Unknown or unsupported ARM architecture
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# endif
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#endif
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/* define __ARM_HAVE_HALFWORD_MULTIPLY when half-word multiply instructions
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* this means variants of: smul, smulw, smla, smlaw, smlal
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*/
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#define __ARM_HAVE_HALFWORD_MULTIPLY 1
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/* define __ARM_HAVE_LDREXD for ARMv7 architecture
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* (also present in ARMv6K, but not implemented in ARMv7-M, neither of which
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* we care about)
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*/
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#if __ARM_ARCH__ >= 7
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# define __ARM_HAVE_LDREXD
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#endif
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/* define _ARM_HAVE_VFP if we have VFPv3
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*/
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#if __ARM_ARCH__ >= 7 && defined __VFP_FP__
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# define __ARM_HAVE_VFP
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#endif
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/* define _ARM_HAVE_NEON for ARMv7 architecture if we support the
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* Neon SIMD instruction set extensions. This also implies
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* that VFPv3-D32 is supported.
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*/
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#if __ARM_ARCH__ >= 7 && defined __ARM_NEON__
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# define __ARM_HAVE_NEON
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#endif
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#endif /* _ARM_MACHINE_CPU_FEATURES_H */
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