cpu_info.h

/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.

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. */

#pragma once

#include <stddef.h>

#ifdef _WIN32
#if defined(__AVX2__)
#include <immintrin.h>  // avx2
#elif defined(__AVX__)
#include <intrin.h>  // avx
#endif               // AVX
#else                // WIN32
#ifdef __AVX__
#include <immintrin.h>
#endif
#endif  // WIN32

#if defined(_WIN32)
#define ALIGN32_BEG __declspec(align(32))
#define ALIGN32_END
#else
#define ALIGN32_BEG
#define ALIGN32_END __attribute__((aligned(32)))
#endif  // _WIN32

#ifndef PADDLE_WITH_XBYAK
#ifdef _WIN32
#define cpuid(reg, x) __cpuidex(reg, x, 0)
#else
#include <cpuid.h>
inline void cpuid(int reg[4], int x) {
  __cpuid_count(x, 0, reg[0], reg[1], reg[2], reg[3]);
}
#endif
#endif

namespace paddle {
namespace platform {

size_t CpuTotalPhysicalMemory();

//! Get the maximum allocation size for a machine.
size_t CpuMaxAllocSize();

//! Get the maximum allocation size for a machine.
size_t CUDAPinnedMaxAllocSize();

//! Get the minimum chunk size for buddy allocator.
size_t CpuMinChunkSize();

//! Get the maximum chunk size for buddy allocator.
size_t CpuMaxChunkSize();

//! Get the minimum chunk size for buddy allocator.
size_t CUDAPinnedMinChunkSize();

//! Get the maximum chunk size for buddy allocator.
size_t CUDAPinnedMaxChunkSize();

typedef enum {
  isa_any,
  sse42,
  avx,
  avx2,
  avx512f,
  avx512_core,
  avx512_core_vnni,
  avx512_mic,
  avx512_mic_4ops,
} cpu_isa_t;  // Instruction set architecture

// May I use some instruction
bool MayIUse(const cpu_isa_t cpu_isa);

}  // namespace platform
}  // namespace paddle