From 8511c97586bf70394e0144d6edbf6fa56778ffde Mon Sep 17 00:00:00 2001
From: lloyd <lloyd@randombit.net>
Date: Thu, 16 Jun 2011 15:00:21 +0000
Subject: Detect (though not using) the CPUID bit for the RDRAND instruction

---
 src/utils/cpuid.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'src/utils')

diff --git a/src/utils/cpuid.h b/src/utils/cpuid.h
index 863ba5b63..ad85ac4fe 100644
--- a/src/utils/cpuid.h
+++ b/src/utils/cpuid.h
@@ -82,6 +82,12 @@ class BOTAN_DLL CPUID
       static bool has_movbe()
          { return x86_processor_flags_has(CPUID_MOVBE_BIT); }
 
+      /**
+      * Check if the processor supports RDRAND
+      */
+      static bool has_rdrand()
+         { return x86_processor_flags_has(CPUID_RDRAND_BIT); }
+
       /**
       * Check if the processor supports AltiVec/VMX
       */
@@ -96,7 +102,8 @@ class BOTAN_DLL CPUID
          CPUID_SSE42_BIT = 52,
          CPUID_MOVBE_BIT = 54,
          CPUID_AESNI_BIT = 57,
-         CPUID_AVX_BIT = 60
+         CPUID_AVX_BIT = 60,
+         CPUID_RDRAND_BIT = 61
       };
 
       static bool x86_processor_flags_has(u64bit bit)
-- 
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