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Extend sys::getHostCPUFeatures to work on AArch64 platforms

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209420 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bradley Smith 2014-05-22 11:44:34 +00:00
parent e3ece90f24
commit 00011c71f9
1 changed files with 37 additions and 1 deletions
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38
lib/Support/Host.cpp
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@ -686,7 +686,7 @@ StringRef sys::getHostCPUName() {
}
#endif
#if defined(__linux__) && defined(__arm__)
#if defined(__linux__) && (defined(__arm__) || defined(__aarch64__))
bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
std::string Err;
DataStreamer *DS = getDataFileStreamer("/proc/cpuinfo", &Err);
@ -715,8 +715,24 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
break;
}
#if defined(__aarch64__)
// Keep track of which crypto features we have seen
enum {
HWCAP_AES = 0x1,
HWCAP_PMULL = 0x2,
HWCAP_SHA1 = 0x4,
HWCAP_SHA2 = 0x8
};
uint32_t crypto = 0;
#endif
for (unsigned I = 0, E = CPUFeatures.size(); I != E; ++I) {
StringRef LLVMFeatureStr = StringSwitch<StringRef>(CPUFeatures[I])
#if defined(__aarch64__)
.Case("asimd", "neon")
.Case("fp", "fp-armv8")
.Case("crc32", "crc")
#else
.Case("half", "fp16")
.Case("neon", "neon")
.Case("vfpv3", "vfp3")
@ -724,12 +740,32 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
.Case("vfpv4", "vfp4")
.Case("idiva", "hwdiv-arm")
.Case("idivt", "hwdiv")
#endif
.Default("");
#if defined(__aarch64__)
// We need to check crypto seperately since we need all of the crypto
// extensions to enable the subtarget feature
if (CPUFeatures[I] == "aes")
crypto |= HWCAP_AES;
else if (CPUFeatures[I] == "pmull")
crypto |= HWCAP_PMULL;
else if (CPUFeatures[I] == "sha1")
crypto |= HWCAP_SHA1;
else if (CPUFeatures[I] == "sha2")
crypto |= HWCAP_SHA2;
#endif
if (LLVMFeatureStr != "")
Features.GetOrCreateValue(LLVMFeatureStr).setValue(true);
}
#if defined(__aarch64__)
// If we have all crypto bits we can add the feature
if (crypto == (HWCAP_AES | HWCAP_PMULL | HWCAP_SHA1 | HWCAP_SHA2))
Features.GetOrCreateValue("crypto").setValue(true);
#endif
return true;
}
#else