mirror of
https://github.com/google/cpu_features.git
synced 2025-04-28 07:23:37 +02:00
c5ece5e8cc
* Add support for Apple M1 AArch64 SoCs Completely based on #150. Thanks to @sbehnke! + Refactoring to accomodate the new source tree + Adding more feature flags * revert minimum version to 3.0 * Update introspection table * Simplify logic for Apple HAVE_SYSCTLBYNAME --------- Co-authored-by: Guillaume Chatelet <gchatelet@google.com>
80 lines
2.9 KiB
C
80 lines
2.9 KiB
C
// Copyright 2017 Google LLC
|
|
//
|
|
// 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 "cpu_features_macros.h"
|
|
|
|
#ifdef CPU_FEATURES_ARCH_AARCH64
|
|
#if defined(CPU_FEATURES_OS_LINUX) || defined(CPU_FEATURES_OS_ANDROID)
|
|
|
|
#include "impl_aarch64__base_implementation.inl"
|
|
|
|
static bool HandleAarch64Line(const LineResult result,
|
|
Aarch64Info* const info) {
|
|
StringView line = result.line;
|
|
StringView key, value;
|
|
if (CpuFeatures_StringView_GetAttributeKeyValue(line, &key, &value)) {
|
|
if (CpuFeatures_StringView_IsEquals(key, str("Features"))) {
|
|
for (size_t i = 0; i < AARCH64_LAST_; ++i) {
|
|
kSetters[i](&info->features, CpuFeatures_StringView_HasWord(
|
|
value, kCpuInfoFlags[i], ' '));
|
|
}
|
|
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU implementer"))) {
|
|
info->implementer = CpuFeatures_StringView_ParsePositiveNumber(value);
|
|
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU variant"))) {
|
|
info->variant = CpuFeatures_StringView_ParsePositiveNumber(value);
|
|
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU part"))) {
|
|
info->part = CpuFeatures_StringView_ParsePositiveNumber(value);
|
|
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU revision"))) {
|
|
info->revision = CpuFeatures_StringView_ParsePositiveNumber(value);
|
|
}
|
|
}
|
|
return !result.eof;
|
|
}
|
|
|
|
static void FillProcCpuInfoData(Aarch64Info* const info) {
|
|
const int fd = CpuFeatures_OpenFile("/proc/cpuinfo");
|
|
if (fd >= 0) {
|
|
StackLineReader reader;
|
|
StackLineReader_Initialize(&reader, fd);
|
|
for (;;) {
|
|
if (!HandleAarch64Line(StackLineReader_NextLine(&reader), info)) {
|
|
break;
|
|
}
|
|
}
|
|
CpuFeatures_CloseFile(fd);
|
|
}
|
|
}
|
|
|
|
static const Aarch64Info kEmptyAarch64Info;
|
|
|
|
Aarch64Info GetAarch64Info(void) {
|
|
// capabilities are fetched from both getauxval and /proc/cpuinfo so we can
|
|
// have some information if the executable is sandboxed (aka no access to
|
|
// /proc/cpuinfo).
|
|
Aarch64Info info = kEmptyAarch64Info;
|
|
|
|
FillProcCpuInfoData(&info);
|
|
const HardwareCapabilities hwcaps = CpuFeatures_GetHardwareCapabilities();
|
|
for (size_t i = 0; i < AARCH64_LAST_; ++i) {
|
|
if (CpuFeatures_IsHwCapsSet(kHardwareCapabilities[i], hwcaps)) {
|
|
kSetters[i](&info.features, true);
|
|
}
|
|
}
|
|
|
|
return info;
|
|
}
|
|
|
|
#endif // defined(CPU_FEATURES_OS_LINUX) || defined(CPU_FEATURES_OS_ANDROID)
|
|
#endif // CPU_FEATURES_ARCH_AARCH64
|