From 0059f486ad0467d5c4dc692db99a5a5f96c2a733 Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Wed, 2 Dec 2015 18:23:10 -0500
Subject: [PATCH] Changed RDSEED to use alternate ctor. Added comments about
 number of retries for RDRAND and RDSEED

---
 validat1.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/validat1.cpp b/validat1.cpp
index 1d614636..144bdbf0 100644
--- a/validat1.cpp
+++ b/validat1.cpp
@@ -460,6 +460,7 @@ bool TestAutoSeeded()
 #if (CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64)
 bool TestRDRAND()
 {
+	// Testing on 6th generation i7 shows RDRAND needs less than 8 retries for 10K bytes.
 	RDRAND rdrand;
 	bool entropy = true, compress = true, discard = true;
 	static const unsigned int SIZE = 10000;
@@ -532,7 +533,8 @@ bool TestRDRAND()
 #if (CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64)
 bool TestRDSEED()
 {
-	RDSEED rdseed;
+	// Testing on 6th generation i7 shows RDSEED needs about 128 retries for 10K bytes.
+	RDSEED rdseed(128);
 	bool entropy = true, compress = true, discard = true;
 	static const unsigned int SIZE = 10000;