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New code layout - breaking change in cpu_features_macros.h (#194)

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This commit helps with platform code separation (fixes #3). It should also help with the build as we can simply include all `impl_*.c` files regardless of OS / arch.

Note: this patch contains breaking changes in `include/cpu_features_macros.h`
 - `CPU_FEATURES_OS_LINUX_OR_ANDROID` does not exist anymore
 - `CPU_FEATURES_OS_FREEBSD`, `CPU_FEATURES_OS_ANDROID` and `CPU_FEATURES_OS_LINUX` are now mutually exclusive (i.e. `CPU_FEATURES_OS_ANDROID` does not imply `CPU_FEATURES_OS_LINUX`)
 - `CPU_FEATURES_OS_DARWIN` has been renamed into `CPU_FEATURES_OS_MACOS` to be able to target non-Mac Apple products (IOS, TV, WATCH). They are now targetable with `CPU_FEATURES_OS_IPHONE`. This matches Apple naming convention described in [this stackoverflow](https://stackoverflow.com/a/49560690).
This commit is contained in:
Guillaume Chatelet
2021-10-28 13:52:46 +02:00
committed by GitHub
parent 0dd8b41eca
commit deb2a61b80
21 changed files with 1296 additions and 1091 deletions
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56
src/impl_x86_macos.c Normal file
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// 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_X86
#ifdef CPU_FEATURES_OS_MACOS
#include "impl_x86__base_implementation.inl"
#if !defined(HAVE_SYSCTLBYNAME)
#error "Darwin needs support for sysctlbyname"
#endif
#include <sys/sysctl.h>
#if defined(CPU_FEATURES_MOCK_CPUID_X86)
extern bool GetDarwinSysCtlByName(const char*);
#else // CPU_FEATURES_MOCK_CPUID_X86
static bool GetDarwinSysCtlByName(const char* name) {
int enabled;
size_t enabled_len = sizeof(enabled);
const int failure = sysctlbyname(name, &enabled, &enabled_len, NULL, 0);
return failure ? false : enabled;
}
#endif
static void OverrideOsPreserves(OsPreserves* os_preserves) {
// On Darwin AVX512 support is On-demand.
// We have to query the OS instead of querying the Zmm save/restore state.
// https://github.com/apple/darwin-xnu/blob/8f02f2a044b9bb1ad951987ef5bab20ec9486310/osfmk/i386/fpu.c#L173-L199
os_preserves->avx512_registers = GetDarwinSysCtlByName("hw.optional.avx512f");
}
static void DetectFeaturesFromOs(X86Features* features) {
// Handling Darwin platform through sysctlbyname.
features->sse = GetDarwinSysCtlByName("hw.optional.sse");
features->sse2 = GetDarwinSysCtlByName("hw.optional.sse2");
features->sse3 = GetDarwinSysCtlByName("hw.optional.sse3");
features->ssse3 = GetDarwinSysCtlByName("hw.optional.supplementalsse3");
features->sse4_1 = GetDarwinSysCtlByName("hw.optional.sse4_1");
features->sse4_2 = GetDarwinSysCtlByName("hw.optional.sse4_2");
}
#endif // CPU_FEATURES_OS_MACOS
#endif // CPU_FEATURES_ARCH_X86