[llvm] r373445 - [Support, ARM64] Define getHostCPUFeatures for Windows on ARM64 platform

[Martin Storsjo via llvm-commits]

Author: mstorsjo
Date: Wed Oct  2 04:04:55 2019
New Revision: 373445

URL: http://llvm.org/viewvc/llvm-project?rev=373445&view=rev
Log:
[Support, ARM64] Define getHostCPUFeatures for Windows on ARM64 platform

Patch by Adam Kallai!

Differential Revision: https://reviews.llvm.org/D68139

Modified:
    llvm/trunk/lib/Support/Host.cpp

Modified: llvm/trunk/lib/Support/Host.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/Host.cpp?rev=373445&r1=373444&r2=373445&view=diff
==============================================================================
--- llvm/trunk/lib/Support/Host.cpp (original)
+++ llvm/trunk/lib/Support/Host.cpp Wed Oct  2 04:04:55 2019
@@ -1512,6 +1512,17 @@ bool sys::getHostCPUFeatures(StringMap<b
 
   return true;
 }
+#elif defined(_WIN32) && (defined(__aarch64__) || defined(_M_ARM64))
+bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
+  if (IsProcessorFeaturePresent(PF_ARM_NEON_INSTRUCTIONS_AVAILABLE))
+    Features["neon"] = true;
+  if (IsProcessorFeaturePresent(PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE))
+    Features["crc"] = true;
+  if (IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE))
+    Features["crypto"] = true;
+
+  return true;
+}
 #else
 bool sys::getHostCPUFeatures(StringMap<bool> &Features) { return false; }
 #endif