2019-06-21 22:11:42 +02:00
|
|
|
// Copyright 2017 The Abseil Authors.
|
|
|
|
|
//
|
|
|
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
|
// you may not use this file except in compliance with the License.
|
|
|
|
|
// You may obtain a copy of the License at
|
|
|
|
|
//
|
|
|
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
|
//
|
|
|
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
|
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
|
// See the License for the specific language governing permissions and
|
|
|
|
|
// limitations under the License.
|
|
|
|
|
|
|
|
|
|
#ifndef ABSL_RANDOM_INTERNAL_PLATFORM_H_
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_PLATFORM_H_
|
|
|
|
|
|
|
|
|
|
// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
|
|
|
|
|
// symbols from arbitrary system and other headers, since it may be built
|
|
|
|
|
// with different flags from other targets, using different levels of
|
|
|
|
|
// optimization, potentially introducing ODR violations.
|
|
|
|
|
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
// Platform Feature Checks
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
// Currently supported operating systems and associated preprocessor
|
|
|
|
|
// symbols:
|
|
|
|
|
//
|
|
|
|
|
// Linux and Linux-derived __linux__
|
|
|
|
|
// Android __ANDROID__ (implies __linux__)
|
|
|
|
|
// Linux (non-Android) __linux__ && !__ANDROID__
|
2019-08-08 19:56:58 +02:00
|
|
|
// Darwin (macOS and iOS) __APPLE__
|
2019-06-21 22:11:42 +02:00
|
|
|
// Akaros (http://akaros.org) __ros__
|
|
|
|
|
// Windows _WIN32
|
|
|
|
|
// NaCL __native_client__
|
|
|
|
|
// AsmJS __asmjs__
|
|
|
|
|
// WebAssembly __wasm__
|
|
|
|
|
// Fuchsia __Fuchsia__
|
|
|
|
|
//
|
|
|
|
|
// Note that since Android defines both __ANDROID__ and __linux__, one
|
|
|
|
|
// may probe for either Linux or Android by simply testing for __linux__.
|
|
|
|
|
//
|
|
|
|
|
// NOTE: For __APPLE__ platforms, we use #include <TargetConditionals.h>
|
|
|
|
|
// to distinguish os variants.
|
|
|
|
|
//
|
|
|
|
|
// http://nadeausoftware.com/articles/2012/01/c_c_tip_how_use_compiler_predefined_macros_detect_operating_system
|
|
|
|
|
|
|
|
|
|
#if defined(__APPLE__)
|
|
|
|
|
#include <TargetConditionals.h>
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
// Architecture Checks
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
// These preprocessor directives are trying to determine CPU architecture,
|
|
|
|
|
// including necessary headers to support hardware AES.
|
|
|
|
|
//
|
|
|
|
|
// ABSL_ARCH_{X86/PPC/ARM} macros determine the platform.
|
|
|
|
|
#if defined(__x86_64__) || defined(__x86_64) || defined(_M_AMD64) || \
|
|
|
|
|
defined(_M_X64)
|
|
|
|
|
#define ABSL_ARCH_X86_64
|
|
|
|
|
#elif defined(__i386) || defined(_M_IX86)
|
|
|
|
|
#define ABSL_ARCH_X86_32
|
|
|
|
|
#elif defined(__aarch64__) || defined(__arm64__) || defined(_M_ARM64)
|
|
|
|
|
#define ABSL_ARCH_AARCH64
|
|
|
|
|
#elif defined(__arm__) || defined(__ARMEL__) || defined(_M_ARM)
|
|
|
|
|
#define ABSL_ARCH_ARM
|
|
|
|
|
#elif defined(__powerpc64__) || defined(__PPC64__) || defined(__powerpc__) || \
|
|
|
|
|
defined(__ppc__) || defined(__PPC__)
|
|
|
|
|
#define ABSL_ARCH_PPC
|
|
|
|
|
#else
|
|
|
|
|
// Unsupported architecture.
|
|
|
|
|
// * https://sourceforge.net/p/predef/wiki/Architectures/
|
|
|
|
|
// * https://msdn.microsoft.com/en-us/library/b0084kay.aspx
|
|
|
|
|
// * for gcc, clang: "echo | gcc -E -dM -"
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
// Attribute Checks
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
// ABSL_RANDOM_INTERNAL_RESTRICT annotates whether pointers may be considered
|
|
|
|
|
// to be unaliased.
|
|
|
|
|
#if defined(__clang__) || defined(__GNUC__)
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_RESTRICT __restrict__
|
|
|
|
|
#elif defined(_MSC_VER)
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_RESTRICT __restrict
|
|
|
|
|
#else
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_RESTRICT
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
// ABSL_HAVE_ACCELERATED_AES indicates whether the currently active compiler
|
|
|
|
|
// flags (e.g. -maes) allow using hardware accelerated AES instructions, which
|
|
|
|
|
// implies us assuming that the target platform supports them.
|
|
|
|
|
#define ABSL_HAVE_ACCELERATED_AES 0
|
|
|
|
|
|
|
|
|
|
#if defined(ABSL_ARCH_X86_64)
|
|
|
|
|
|
|
|
|
|
#if defined(__AES__) || defined(__AVX__)
|
|
|
|
|
#undef ABSL_HAVE_ACCELERATED_AES
|
|
|
|
|
#define ABSL_HAVE_ACCELERATED_AES 1
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#elif defined(ABSL_ARCH_PPC)
|
|
|
|
|
|
|
|
|
|
// Rely on VSX and CRYPTO extensions for vcipher on PowerPC.
|
|
|
|
|
#if (defined(__VEC__) || defined(__ALTIVEC__)) && defined(__VSX__) && \
|
|
|
|
|
defined(__CRYPTO__)
|
|
|
|
|
#undef ABSL_HAVE_ACCELERATED_AES
|
|
|
|
|
#define ABSL_HAVE_ACCELERATED_AES 1
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#elif defined(ABSL_ARCH_ARM) || defined(ABSL_ARCH_AARCH64)
|
|
|
|
|
|
|
|
|
|
// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0053c/IHI0053C_acle_2_0.pdf
|
|
|
|
|
// Rely on NEON+CRYPTO extensions for ARM.
|
|
|
|
|
#if defined(__ARM_NEON) && defined(__ARM_FEATURE_CRYPTO)
|
|
|
|
|
#undef ABSL_HAVE_ACCELERATED_AES
|
|
|
|
|
#define ABSL_HAVE_ACCELERATED_AES 1
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
// NaCl does not allow AES.
|
|
|
|
|
#if defined(__native_client__)
|
|
|
|
|
#undef ABSL_HAVE_ACCELERATED_AES
|
|
|
|
|
#define ABSL_HAVE_ACCELERATED_AES 0
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
// ABSL_RANDOM_INTERNAL_AES_DISPATCH indicates whether the currently active
|
|
|
|
|
// platform has, or should use run-time dispatch for selecting the
|
|
|
|
|
// acclerated Randen implementation.
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 0
|
|
|
|
|
|
|
|
|
|
#if defined(ABSL_ARCH_X86_64)
|
|
|
|
|
// Dispatch is available on x86_64
|
|
|
|
|
#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 1
|
|
|
|
|
#elif defined(__linux__) && defined(ABSL_ARCH_PPC)
|
|
|
|
|
// Or when running linux PPC
|
|
|
|
|
#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 1
|
|
|
|
|
#elif defined(__linux__) && defined(ABSL_ARCH_AARCH64)
|
|
|
|
|
// Or when running linux AArch64
|
|
|
|
|
#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 1
|
|
|
|
|
#elif defined(__linux__) && defined(ABSL_ARCH_ARM) && (__ARM_ARCH >= 8)
|
|
|
|
|
// Or when running linux ARM v8 or higher.
|
|
|
|
|
// (This captures a lot of Android configurations.)
|
|
|
|
|
#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 1
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
// NaCl does not allow dispatch.
|
|
|
|
|
#if defined(__native_client__)
|
|
|
|
|
#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 0
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
// iOS does not support dispatch, even on x86, since applications
|
|
|
|
|
// should be bundled as fat binaries, with a different build tailored for
|
|
|
|
|
// each specific supported platform/architecture.
|
2019-11-18 20:02:26 +01:00
|
|
|
#if (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) || \
|
|
|
|
|
(defined(TARGET_OS_IPHONE_SIMULATOR) && TARGET_OS_IPHONE_SIMULATOR)
|
2019-06-21 22:11:42 +02:00
|
|
|
#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
|
|
|
|
|
#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 0
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#endif // ABSL_RANDOM_INTERNAL_PLATFORM_H_
|
