You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
382 lines
12 KiB
382 lines
12 KiB
/*
|
|
* Copyright (C) 2014 The Android Open Source Project
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "instruction_set_features_x86.h"
|
|
|
|
#include <fstream>
|
|
#include <sstream>
|
|
|
|
#include <android-base/logging.h>
|
|
#include <android-base/stringprintf.h>
|
|
#include <android-base/strings.h>
|
|
|
|
#include "arch/x86_64/instruction_set_features_x86_64.h"
|
|
|
|
#include <cpu_features_macros.h>
|
|
|
|
#ifdef CPU_FEATURES_ARCH_X86
|
|
// This header can only be included on x86 targets,
|
|
// as determined by cpu_features own define.
|
|
#include <cpuinfo_x86.h>
|
|
#endif
|
|
|
|
namespace art {
|
|
|
|
using android::base::StringPrintf;
|
|
|
|
// Feature-support arrays.
|
|
|
|
static constexpr const char* x86_known_variants[] = {
|
|
"atom",
|
|
"sandybridge",
|
|
"silvermont",
|
|
"kabylake",
|
|
};
|
|
|
|
static constexpr const char* x86_variants_with_ssse3[] = {
|
|
"atom",
|
|
"sandybridge",
|
|
"silvermont",
|
|
"kabylake",
|
|
};
|
|
|
|
static constexpr const char* x86_variants_with_sse4_1[] = {
|
|
"sandybridge",
|
|
"silvermont",
|
|
"kabylake",
|
|
};
|
|
|
|
static constexpr const char* x86_variants_with_sse4_2[] = {
|
|
"sandybridge",
|
|
"silvermont",
|
|
"kabylake",
|
|
};
|
|
|
|
static constexpr const char* x86_variants_with_popcnt[] = {
|
|
"sandybridge",
|
|
"silvermont",
|
|
"kabylake",
|
|
};
|
|
static constexpr const char* x86_variants_with_avx[] = {
|
|
"kabylake",
|
|
};
|
|
|
|
static constexpr const char* x86_variants_with_avx2[] = {
|
|
"kabylake",
|
|
};
|
|
|
|
X86FeaturesUniquePtr X86InstructionSetFeatures::Create(bool x86_64,
|
|
bool has_SSSE3,
|
|
bool has_SSE4_1,
|
|
bool has_SSE4_2,
|
|
bool has_AVX,
|
|
bool has_AVX2,
|
|
bool has_POPCNT) {
|
|
if (x86_64) {
|
|
return X86FeaturesUniquePtr(new X86_64InstructionSetFeatures(has_SSSE3,
|
|
has_SSE4_1,
|
|
has_SSE4_2,
|
|
has_AVX,
|
|
has_AVX2,
|
|
has_POPCNT));
|
|
} else {
|
|
return X86FeaturesUniquePtr(new X86InstructionSetFeatures(has_SSSE3,
|
|
has_SSE4_1,
|
|
has_SSE4_2,
|
|
has_AVX,
|
|
has_AVX2,
|
|
has_POPCNT));
|
|
}
|
|
}
|
|
|
|
X86FeaturesUniquePtr X86InstructionSetFeatures::FromVariant(
|
|
const std::string& variant, std::string* error_msg ATTRIBUTE_UNUSED,
|
|
bool x86_64) {
|
|
const bool is_runtime_isa =
|
|
kRuntimeISA == (x86_64 ? InstructionSet::kX86_64 : InstructionSet::kX86);
|
|
if (is_runtime_isa && variant == "default") {
|
|
return FromCppDefines(x86_64);
|
|
}
|
|
|
|
bool has_SSSE3 = FindVariantInArray(x86_variants_with_ssse3, arraysize(x86_variants_with_ssse3),
|
|
variant);
|
|
bool has_SSE4_1 = FindVariantInArray(x86_variants_with_sse4_1,
|
|
arraysize(x86_variants_with_sse4_1),
|
|
variant);
|
|
bool has_SSE4_2 = FindVariantInArray(x86_variants_with_sse4_2,
|
|
arraysize(x86_variants_with_sse4_2),
|
|
variant);
|
|
bool has_AVX = FindVariantInArray(x86_variants_with_avx,
|
|
arraysize(x86_variants_with_avx),
|
|
variant);
|
|
bool has_AVX2 = FindVariantInArray(x86_variants_with_avx2,
|
|
arraysize(x86_variants_with_avx2),
|
|
variant);
|
|
bool has_POPCNT = FindVariantInArray(x86_variants_with_popcnt,
|
|
arraysize(x86_variants_with_popcnt),
|
|
variant);
|
|
|
|
// Verify that variant is known.
|
|
bool known_variant = FindVariantInArray(x86_known_variants, arraysize(x86_known_variants),
|
|
variant);
|
|
if (!known_variant && variant != "default") {
|
|
LOG(WARNING) << "Unexpected CPU variant for X86 using defaults: " << variant;
|
|
}
|
|
|
|
return Create(x86_64, has_SSSE3, has_SSE4_1, has_SSE4_2, has_AVX, has_AVX2, has_POPCNT);
|
|
}
|
|
|
|
X86FeaturesUniquePtr X86InstructionSetFeatures::FromBitmap(uint32_t bitmap, bool x86_64) {
|
|
bool has_SSSE3 = (bitmap & kSsse3Bitfield) != 0;
|
|
bool has_SSE4_1 = (bitmap & kSse4_1Bitfield) != 0;
|
|
bool has_SSE4_2 = (bitmap & kSse4_2Bitfield) != 0;
|
|
bool has_AVX = (bitmap & kAvxBitfield) != 0;
|
|
bool has_AVX2 = (bitmap & kAvxBitfield) != 0;
|
|
bool has_POPCNT = (bitmap & kPopCntBitfield) != 0;
|
|
return Create(x86_64, has_SSSE3, has_SSE4_1, has_SSE4_2, has_AVX, has_AVX2, has_POPCNT);
|
|
}
|
|
|
|
X86FeaturesUniquePtr X86InstructionSetFeatures::FromCppDefines(bool x86_64) {
|
|
#ifndef __SSSE3__
|
|
const bool has_SSSE3 = false;
|
|
#else
|
|
const bool has_SSSE3 = true;
|
|
#endif
|
|
|
|
#ifndef __SSE4_1__
|
|
const bool has_SSE4_1 = false;
|
|
#else
|
|
const bool has_SSE4_1 = true;
|
|
#endif
|
|
|
|
#ifndef __SSE4_2__
|
|
const bool has_SSE4_2 = false;
|
|
#else
|
|
const bool has_SSE4_2 = true;
|
|
#endif
|
|
|
|
#ifndef __AVX__
|
|
const bool has_AVX = false;
|
|
#else
|
|
const bool has_AVX = true;
|
|
#endif
|
|
|
|
#ifndef __AVX2__
|
|
const bool has_AVX2 = false;
|
|
#else
|
|
const bool has_AVX2 = true;
|
|
#endif
|
|
|
|
#ifndef __POPCNT__
|
|
const bool has_POPCNT = false;
|
|
#else
|
|
const bool has_POPCNT = true;
|
|
#endif
|
|
|
|
return Create(x86_64, has_SSSE3, has_SSE4_1, has_SSE4_2, has_AVX, has_AVX2, has_POPCNT);
|
|
}
|
|
|
|
X86FeaturesUniquePtr X86InstructionSetFeatures::FromCpuInfo(bool x86_64) {
|
|
// Look in /proc/cpuinfo for features we need. Only use this when we can guarantee that
|
|
// the kernel puts the appropriate feature flags in here. Sometimes it doesn't.
|
|
bool has_SSSE3 = false;
|
|
bool has_SSE4_1 = false;
|
|
bool has_SSE4_2 = false;
|
|
bool has_AVX = false;
|
|
bool has_AVX2 = false;
|
|
bool has_POPCNT = false;
|
|
|
|
std::ifstream in("/proc/cpuinfo");
|
|
if (!in.fail()) {
|
|
while (!in.eof()) {
|
|
std::string line;
|
|
std::getline(in, line);
|
|
if (!in.eof()) {
|
|
LOG(INFO) << "cpuinfo line: " << line;
|
|
if (line.find("flags") != std::string::npos) {
|
|
LOG(INFO) << "found flags";
|
|
if (line.find("ssse3") != std::string::npos) {
|
|
has_SSSE3 = true;
|
|
}
|
|
if (line.find("sse4_1") != std::string::npos) {
|
|
has_SSE4_1 = true;
|
|
}
|
|
if (line.find("sse4_2") != std::string::npos) {
|
|
has_SSE4_2 = true;
|
|
}
|
|
if (line.find("avx") != std::string::npos) {
|
|
has_AVX = true;
|
|
}
|
|
if (line.find("avx2") != std::string::npos) {
|
|
has_AVX2 = true;
|
|
}
|
|
if (line.find("popcnt") != std::string::npos) {
|
|
has_POPCNT = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
in.close();
|
|
} else {
|
|
LOG(ERROR) << "Failed to open /proc/cpuinfo";
|
|
}
|
|
return Create(x86_64, has_SSSE3, has_SSE4_1, has_SSE4_2, has_AVX, has_AVX2, has_POPCNT);
|
|
}
|
|
|
|
X86FeaturesUniquePtr X86InstructionSetFeatures::FromHwcap(bool x86_64) {
|
|
UNIMPLEMENTED(WARNING);
|
|
return FromCppDefines(x86_64);
|
|
}
|
|
|
|
X86FeaturesUniquePtr X86InstructionSetFeatures::FromAssembly(bool x86_64) {
|
|
UNIMPLEMENTED(WARNING);
|
|
return FromCppDefines(x86_64);
|
|
}
|
|
|
|
|
|
X86FeaturesUniquePtr X86InstructionSetFeatures::FromCpuFeatures(bool x86_64) {
|
|
#ifdef CPU_FEATURES_ARCH_X86
|
|
cpu_features::X86Features features = cpu_features::GetX86Info().features;
|
|
return Create(x86_64,
|
|
features.ssse3,
|
|
features.sse4_1,
|
|
features.sse4_2,
|
|
features.avx,
|
|
features.avx2,
|
|
features.popcnt);
|
|
#else
|
|
UNIMPLEMENTED(WARNING);
|
|
return FromCppDefines(x86_64);
|
|
#endif
|
|
}
|
|
|
|
|
|
bool X86InstructionSetFeatures::Equals(const InstructionSetFeatures* other) const {
|
|
if (GetInstructionSet() != other->GetInstructionSet()) {
|
|
return false;
|
|
}
|
|
const X86InstructionSetFeatures* other_as_x86 = other->AsX86InstructionSetFeatures();
|
|
return (has_SSSE3_ == other_as_x86->has_SSSE3_) &&
|
|
(has_SSE4_1_ == other_as_x86->has_SSE4_1_) &&
|
|
(has_SSE4_2_ == other_as_x86->has_SSE4_2_) &&
|
|
(has_AVX_ == other_as_x86->has_AVX_) &&
|
|
(has_AVX2_ == other_as_x86->has_AVX2_) &&
|
|
(has_POPCNT_ == other_as_x86->has_POPCNT_);
|
|
}
|
|
|
|
bool X86InstructionSetFeatures::HasAtLeast(const InstructionSetFeatures* other) const {
|
|
if (GetInstructionSet() != other->GetInstructionSet()) {
|
|
return false;
|
|
}
|
|
const X86InstructionSetFeatures* other_as_x86 = other->AsX86InstructionSetFeatures();
|
|
return (has_SSSE3_ || !other_as_x86->has_SSSE3_) &&
|
|
(has_SSE4_1_ || !other_as_x86->has_SSE4_1_) &&
|
|
(has_SSE4_2_ || !other_as_x86->has_SSE4_2_) &&
|
|
(has_AVX_ || !other_as_x86->has_AVX_) &&
|
|
(has_AVX2_ || !other_as_x86->has_AVX2_) &&
|
|
(has_POPCNT_ || !other_as_x86->has_POPCNT_);
|
|
}
|
|
|
|
uint32_t X86InstructionSetFeatures::AsBitmap() const {
|
|
return (has_SSSE3_ ? kSsse3Bitfield : 0) |
|
|
(has_SSE4_1_ ? kSse4_1Bitfield : 0) |
|
|
(has_SSE4_2_ ? kSse4_2Bitfield : 0) |
|
|
(has_AVX_ ? kAvxBitfield : 0) |
|
|
(has_AVX2_ ? kAvx2Bitfield : 0) |
|
|
(has_POPCNT_ ? kPopCntBitfield : 0);
|
|
}
|
|
|
|
std::string X86InstructionSetFeatures::GetFeatureString() const {
|
|
std::string result;
|
|
if (has_SSSE3_) {
|
|
result += "ssse3";
|
|
} else {
|
|
result += "-ssse3";
|
|
}
|
|
if (has_SSE4_1_) {
|
|
result += ",sse4.1";
|
|
} else {
|
|
result += ",-sse4.1";
|
|
}
|
|
if (has_SSE4_2_) {
|
|
result += ",sse4.2";
|
|
} else {
|
|
result += ",-sse4.2";
|
|
}
|
|
if (has_AVX_) {
|
|
result += ",avx";
|
|
} else {
|
|
result += ",-avx";
|
|
}
|
|
if (has_AVX2_) {
|
|
result += ",avx2";
|
|
} else {
|
|
result += ",-avx2";
|
|
}
|
|
if (has_POPCNT_) {
|
|
result += ",popcnt";
|
|
} else {
|
|
result += ",-popcnt";
|
|
}
|
|
return result;
|
|
}
|
|
|
|
std::unique_ptr<const InstructionSetFeatures> X86InstructionSetFeatures::AddFeaturesFromSplitString(
|
|
const std::vector<std::string>& features, bool x86_64,
|
|
std::string* error_msg) const {
|
|
bool has_SSSE3 = has_SSSE3_;
|
|
bool has_SSE4_1 = has_SSE4_1_;
|
|
bool has_SSE4_2 = has_SSE4_2_;
|
|
bool has_AVX = has_AVX_;
|
|
bool has_AVX2 = has_AVX2_;
|
|
bool has_POPCNT = has_POPCNT_;
|
|
for (const std::string& feature : features) {
|
|
DCHECK_EQ(android::base::Trim(feature), feature)
|
|
<< "Feature name is not trimmed: '" << feature << "'";
|
|
if (feature == "ssse3") {
|
|
has_SSSE3 = true;
|
|
} else if (feature == "-ssse3") {
|
|
has_SSSE3 = false;
|
|
} else if (feature == "sse4.1") {
|
|
has_SSE4_1 = true;
|
|
} else if (feature == "-sse4.1") {
|
|
has_SSE4_1 = false;
|
|
} else if (feature == "sse4.2") {
|
|
has_SSE4_2 = true;
|
|
} else if (feature == "-sse4.2") {
|
|
has_SSE4_2 = false;
|
|
} else if (feature == "avx") {
|
|
has_AVX = true;
|
|
} else if (feature == "-avx") {
|
|
has_AVX = false;
|
|
} else if (feature == "avx2") {
|
|
has_AVX2 = true;
|
|
} else if (feature == "-avx2") {
|
|
has_AVX2 = false;
|
|
} else if (feature == "popcnt") {
|
|
has_POPCNT = true;
|
|
} else if (feature == "-popcnt") {
|
|
has_POPCNT = false;
|
|
} else {
|
|
*error_msg = StringPrintf("Unknown instruction set feature: '%s'", feature.c_str());
|
|
return nullptr;
|
|
}
|
|
}
|
|
return Create(x86_64, has_SSSE3, has_SSE4_1, has_SSE4_2, has_AVX, has_AVX2, has_POPCNT);
|
|
}
|
|
|
|
} // namespace art
|