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/*
* Copyright (C) 2008 The Android Open Source Project
* 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.
*
* 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 OWNER 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.
*/
#ifndef _ARM_MACHINE_CPU_FEATURES_H
#define _ARM_MACHINE_CPU_FEATURES_H
/* The purpose of this file is to define several macros corresponding
* to CPU features that may or may not be available at build time on
* on the target CPU.
*
* This is done to abstract us from the various ARM Architecture
* quirks and alphabet soup.
*/
/* __ARM_ARCH__ is a number corresponding to the ARM revision
* we're going to support. Our toolchain doesn't define __ARM_ARCH__
* so try to guess it.
*/
#ifndef __ARM_ARCH__
# if defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ || \
defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
# define __ARM_ARCH__ 7
# elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ || \
defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6Z__ || \
defined __ARM_ARCH_6KZ__ || defined __ARM_ARCH_6T2__
# define __ARM_ARCH__ 6
# else
# error Unknown or unsupported ARM architecture
# endif
#endif
/* define __ARM_HAVE_HALFWORD_MULTIPLY when half-word multiply instructions
* this means variants of: smul, smulw, smla, smlaw, smlal
*/
#define __ARM_HAVE_HALFWORD_MULTIPLY 1
/* define __ARM_HAVE_LDREXD for ARMv7 architecture
* (also present in ARMv6K, but not implemented in ARMv7-M, neither of which
* we care about)
*/
#if __ARM_ARCH__ >= 7
# define __ARM_HAVE_LDREXD
#endif
/* define _ARM_HAVE_VFP if we have VFPv3
*/
#if __ARM_ARCH__ >= 7 && defined __VFP_FP__
# define __ARM_HAVE_VFP
#endif
/* define _ARM_HAVE_NEON for ARMv7 architecture if we support the
* Neon SIMD instruction set extensions. This also implies
* that VFPv3-D32 is supported.
*/
#if __ARM_ARCH__ >= 7 && defined __ARM_NEON__
# define __ARM_HAVE_NEON
#endif
#endif /* _ARM_MACHINE_CPU_FEATURES_H */
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