[PATCH] D68139: [Support, ARM64] Define getHostCPUFeatures for Windows on ARM64 platform

[Ádám Kallai via Phabricator via llvm-commits]

kaadam created this revision.
kaadam added a reviewer: Bigcheese.
Herald added subscribers: llvm-commits, dexonsmith, kristof.beyls.
Herald added a project: LLVM.

This change implements getHostCPUFeatures function to enable this functionality on Windows on ARM64.  Unittest isn't included for this patch, since I'm not able to see how to reasonably write one, and I couldn't find any existing testcases related to it.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D68139

Files:
  lib/Support/Host.cpp


Index: lib/Support/Host.cpp
===================================================================
--- lib/Support/Host.cpp
+++ lib/Support/Host.cpp
@@ -1512,6 +1512,17 @@
 
   return true;
 }
+#elif defined(_WIN32) && defined(__aarch64__)
+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


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