diff options
| -rw-r--r-- | rdrand.h | 13 |
1 files changed, 6 insertions, 7 deletions
@@ -9,12 +9,11 @@ #include "cryptlib.h"
-// This file (and friends) provides both RDRAND and RDSEED. They were added at
+// This class file provides both RDRAND and RDSEED. They were added at
// Crypto++ 5.6.3. At compile time, it uses CRYPTOPP_BOOL_{X86|X32|X64}
-// to select an implementation or "throw NotImplemented". The class does not
-// use CPUID to determine if RDRAND or RDSEED are available. If not available,
-// then a SIGILL will result. Users of the classes should call HasRDRAND() or
-// HasRDSEED() to determine if a generator is available.
+// to select an implementation or "throw NotImplemented". At runtime the
+// constructor will throw RDRAND_Err or RDSEED_Err if a generator is
+// is not available.
// The original classes accepted a retry count. Retries were superflous for
// RDRAND, and RDSEED encountered a failure about 1 in 256 bytes depending
// on the processor. Retries were removed at Crypto++ 6.0 because
@@ -28,8 +27,8 @@ // during testing with Athlon X4 845. The Bulldozer v4 only performed at 1 MiB/s.
// Microsoft added RDRAND in August 2012, VS2012; RDSEED in October 2013, VS2013.
-// GCC added RDRAND in December 2010, GCC 4.6. LLVM added RDRAND in July 2012, Clang 3.2.
-// Intel added RDRAND in September 2011, ICC 12.1.
+// GCC added RDRAND in December 2010, GCC 4.6. LLVM added RDRAND in July 2012,
+// Clang 3.2. Intel added RDRAND in September 2011, ICC 12.1.
NAMESPACE_BEGIN(CryptoPP)
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