f89958d824
Largely to bring in preprocessor support for additional architectures as
based on 6215ba804eb500f3e28b39088c73af3c4f4cd10a by
Timothy Gu <timothygu99@gmail.com>:
Add preprocessor support for additional architectures
- _M_ARM is used by Microsoft [1]
- __riscv and __riscv_xlen are defined by [2]
- __sparc and __sparc__ are documented at [3]
- __MIPSEB__, __PPC__, __PPC64__ are documented at [3] and used in
Chromium's build/build_config.h [4]
Note: Chromium assumes that all PowerPC architectures are 64-bit. This
is in fact not true.
[1]: https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-160
[2]: feca479356 (cc-preprocessor-definitions)
[3]: https://sourceforge.net/p/predef/wiki/Architectures/
[4]: https://source.chromium.org/chromium/chromium/src/+/master:build/build_config.h;drc=e12bf2e5ff1eacb9aca3e9a26bdeebdbdad5965a
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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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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// https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros
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// https://www.agner.org/optimize/calling_conventions.pdf
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// https://sourceforge.net/p/predef/wiki/Architectures/
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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(_M_ARM64) || 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(_M_ARM) || defined(__ARMEL__)
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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__) || defined(__MIPSEB__)
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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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#if defined(__MIPSEL__)
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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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#elif defined(__PPC__)
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#if defined(__PPC64__)
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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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#if defined(__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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#elif defined(__sparc) || defined(__sparc__)
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#if __SIZEOF_LONG__ == 8
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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_BIG_ENDIAN
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#elif defined(__riscv) && __riscv_xlen == 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(__riscv) && __riscv_xlen == 32
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#define WEBRTC_ARCH_32_BITS
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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(__EMSCRIPTEN__)
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#define WEBRTC_ARCH_32_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#else
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#error Please add support for your architecture in rtc_base/system/arch.h
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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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