/* * Copyright 2019 The libgav1 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 * * http://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 LIBGAV1_SRC_UTILS_CPU_H_ #define LIBGAV1_SRC_UTILS_CPU_H_ #include <cstdint> namespace libgav1 { #if defined(__i386__) || defined(__x86_64__) #define LIBGAV1_X86 #elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64)) #define LIBGAV1_X86 #define LIBGAV1_X86_MSVC #endif #if defined(LIBGAV1_X86) #if !defined(LIBGAV1_ENABLE_SSE4_1) #define LIBGAV1_ENABLE_SSE4_1 … #endif #if LIBGAV1_ENABLE_SSE4_1 #if !defined(LIBGAV1_ENABLE_AVX2) #define LIBGAV1_ENABLE_AVX2 … #endif // !defined(LIBGAV1_ENABLE_AVX2) #else // !LIBGAV1_ENABLE_SSE4_1 // Disable AVX2 when SSE4.1 is disabled as it may rely on shared components. #undef LIBGAV1_ENABLE_AVX2 #define LIBGAV1_ENABLE_AVX2 … #endif // LIBGAV1_ENABLE_SSE4_1 #else // !LIBGAV1_X86 #undef LIBGAV1_ENABLE_AVX2 #define LIBGAV1_ENABLE_AVX2 … #undef LIBGAV1_ENABLE_SSE4_1 #define LIBGAV1_ENABLE_SSE4_1 … #endif // LIBGAV1_X86 // For x86 LIBGAV1_TARGETING_* indicate the source being built is targeting // (at least) that instruction set. This prevents disabling other instruction // sets if the current instruction set isn't a global target, e.g., building // *_avx2.cc w/-mavx2, but the remaining files without the flag. #if LIBGAV1_ENABLE_AVX2 && defined(__AVX2__) #define LIBGAV1_TARGETING_AVX2 … #else #define LIBGAV1_TARGETING_AVX2 … #endif // Note: LIBGAV1_X86_MSVC isn't completely correct for Visual Studio, but there // is no equivalent to __SSE4_1__. LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS will be // enabled in dsp.h to compensate for this. #if LIBGAV1_ENABLE_SSE4_1 && (defined(__SSE4_1__) || defined(LIBGAV1_X86_MSVC)) #define LIBGAV1_TARGETING_SSE4_1 … #else #define LIBGAV1_TARGETING_SSE4_1 … #endif #undef LIBGAV1_X86 #if !defined(LIBGAV1_ENABLE_NEON) // TODO(jzern): add support for _M_ARM64. #if defined(__ARM_NEON__) || defined(__aarch64__) || \ (defined(_MSC_VER) && defined(_M_ARM)) #define LIBGAV1_ENABLE_NEON … #else #define LIBGAV1_ENABLE_NEON … #endif #endif // !defined(LIBGAV1_ENABLE_NEON) enum CpuFeatures : uint8_t { … }; // Returns a bit-wise OR of CpuFeatures supported by this platform. uint32_t GetCpuInfo(); } // namespace libgav1 #endif // LIBGAV1_SRC_UTILS_CPU_H_
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