1 files changed, 14 insertions, 0 deletions
diff --git a/src/leveldb/port/port_posix.cc b/src/leveldb/port/port_posix.cc
index 30e8007ae3..ec39e92195 100644
--- a/src/leveldb/port/port_posix.cc
+++ b/src/leveldb/port/port_posix.cc
@@ -8,6 +8,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#if (defined(__x86_64__) || defined(__i386__)) && defined(__GNUC__)
+#include <cpuid.h>
+#endif
+
 namespace leveldb {
 namespace port {
 
@@ -49,5 +53,15 @@ void InitOnce(OnceType* once, void (*initializer)()) {
   PthreadCall("once", pthread_once(once, initializer));
 }
 
+bool HasAcceleratedCRC32C() {
+#if (defined(__x86_64__) || defined(__i386__)) && defined(__GNUC__)
+  unsigned int eax, ebx, ecx, edx;
+  __get_cpuid(1, &eax, &ebx, &ecx, &edx);
+  return (ecx & (1 << 20)) != 0;
+#else
+  return false;
+#endif
+}
+
 }  // namespace port
 }  // namespace leveldb