1 files changed, 80 insertions, 0 deletions
diff --git a/src/arch/intel.c b/src/arch/intel.c
new file mode 100644
index 000000000..5c483dccb
--- /dev/null
+++ b/src/arch/intel.c
@@ -0,0 +1,80 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2013,2014 Inktank Storage, Inc.
+ * Copyright (C) 2014 Cloudwatt <libre.licensing@cloudwatt.com>
+ *
+ * Author: Loic Dachary <loic@dachary.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ * 
+ */
+#include <stdio.h>
+#include "arch/probe.h"
+
+/* flags we export */
+int ceph_arch_intel_pclmul = 0;
+int ceph_arch_intel_sse42 = 0;
+int ceph_arch_intel_sse41 = 0;
+int ceph_arch_intel_ssse3 = 0;
+int ceph_arch_intel_sse3 = 0;
+int ceph_arch_intel_sse2 = 0;
+int ceph_arch_intel_aesni = 0;
+
+#ifdef __x86_64__
+#include <cpuid.h>
+
+/* http://en.wikipedia.org/wiki/CPUID#EAX.3D1:_Processor_Info_and_Feature_Bits */
+
+#define CPUID_PCLMUL	(1 << 1)
+#define CPUID_SSE42	(1 << 20)
+#define CPUID_SSE41	(1 << 19)
+#define CPUID_SSSE3	(1 << 9)
+#define CPUID_SSE3	(1)
+#define CPUID_SSE2	(1 << 26)
+#define CPUID_AESNI (1 << 25)
+
+int ceph_arch_intel_probe(void)
+{
+	/* i know how to check this on x86_64... */
+	unsigned int eax, ebx, ecx = 0, edx = 0;
+	if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx)) {
+	  return 1;
+	}
+	if ((ecx & CPUID_PCLMUL) != 0) {
+		ceph_arch_intel_pclmul = 1;
+	}
+	if ((ecx & CPUID_SSE42) != 0) {
+		ceph_arch_intel_sse42 = 1;
+	}
+	if ((ecx & CPUID_SSE41) != 0) {
+		ceph_arch_intel_sse41 = 1;
+	}
+	if ((ecx & CPUID_SSSE3) != 0) {
+	        ceph_arch_intel_ssse3 = 1;
+	}
+	if ((ecx & CPUID_SSE3) != 0) {
+	        ceph_arch_intel_sse3 = 1;
+	}
+	if ((edx & CPUID_SSE2) != 0) {
+	        ceph_arch_intel_sse2 = 1;
+	}
+  if ((ecx & CPUID_AESNI) != 0) {
+          ceph_arch_intel_aesni = 1;
+  }
+
+	return 0;
+}
+
+#else // __x86_64__
+
+int ceph_arch_intel_probe(void)
+{
+	/* no features */
+	return 0;
+}
+
+#endif // __x86_64__