81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
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/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// This file contains platform-specific typedefs and defines.
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// Much of it is derived from Chromium's build/build_config.h.
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#ifndef RTC_BASE_SYSTEM_ARCH_H_
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#define RTC_BASE_SYSTEM_ARCH_H_
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// Processor architecture detection. For more info on what's defined, see:
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// http://msdn.microsoft.com/en-us/library/b0084kay.aspx
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// http://www.agner.org/optimize/calling_conventions.pdf
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// or with gcc, run: "echo | gcc -E -dM -"
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#if defined(_M_X64) || defined(__x86_64__)
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#define WEBRTC_ARCH_X86_FAMILY
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#define WEBRTC_ARCH_X86_64
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#define WEBRTC_ARCH_64_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__aarch64__)
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#define WEBRTC_ARCH_ARM_FAMILY
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#define WEBRTC_ARCH_64_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(_M_IX86) || defined(__i386__)
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#define WEBRTC_ARCH_X86_FAMILY
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#define WEBRTC_ARCH_X86
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#define WEBRTC_ARCH_32_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__ARMEL__) || defined(__arm__) || defined(_M_ARM)
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#define WEBRTC_ARCH_ARM_FAMILY
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#define WEBRTC_ARCH_32_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__MIPSEL__)
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#define WEBRTC_ARCH_MIPS_FAMILY
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#if defined(__LP64__)
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#define WEBRTC_ARCH_64_BITS
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#else
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#define WEBRTC_ARCH_32_BITS
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#endif
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__pnacl__)
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#define WEBRTC_ARCH_32_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__powerpc64__)
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#else
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#define WEBRTC_ARCH_BIG_ENDIAN
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#endif
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#define WEBRTC_ARCH_64_BITS
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#elif defined(__powerpc__)
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#define WEBRTC_ARCH_BIG_ENDIAN
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#define WEBRTC_ARCH_32_BITS
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#else
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/* instead of failing, use typical unix defines... */
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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#define WEBRTC_ARCH_BIG_ENDIAN
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#else
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#error __BYTE_ORDER__ is not defined
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#endif
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#if defined(__LP64__)
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#define WEBRTC_ARCH_64_BITS
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#else
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#define WEBRTC_ARCH_32_BITS
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#endif
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#endif
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#if !(defined(WEBRTC_ARCH_LITTLE_ENDIAN) ^ defined(WEBRTC_ARCH_BIG_ENDIAN))
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#error Define either WEBRTC_ARCH_LITTLE_ENDIAN or WEBRTC_ARCH_BIG_ENDIAN
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#endif
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#endif // RTC_BASE_SYSTEM_ARCH_H_
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