From 2f58912fddb27d1e8e0045e77adb745db62e5f42 Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Sun, 21 May 2017 11:38:56 -0400
Subject: [PATCH] Enable RDSEED and SHA for AMD processors AMD donated a AMD
 Ryzen 7 1700X to the GCC Compile Farm. We were able to verify compatibility
 and correctness. Many thanks to AMD for the donation

---
 cpu.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/cpu.cpp b/cpu.cpp
index f5822600..dd2d87fa 100644
--- a/cpu.cpp
+++ b/cpu.cpp
@@ -267,10 +267,21 @@ void DetectX86Features()
 	else if (IsAMD(cpuid1))
 	{
 		static const unsigned int RDRAND_FLAG = (1 << 30);
+		static const unsigned int RDSEED_FLAG = (1 << 18);
+		static const unsigned int    SHA_FLAG = (1 << 29);
 
 		CpuId(0x01, cpuid1);
 		g_hasRDRAND = !!(cpuid1[2] /*ECX*/ & RDRAND_FLAG);
 
+		if (cpuid1[0] /*EAX*/ >= 7)
+		{
+			if (CpuId(7, cpuid3))
+			{
+				g_hasRDSEED = !!(cpuid3[1] /*EBX*/ & RDSEED_FLAG);
+				g_hasSHA = !!(cpuid3[1] /*EBX*/ & SHA_FLAG);
+			}
+		}
+
 		CpuId(0x80000005, cpuid1);
 		g_cacheLineSize = GETBYTE(cpuid1[2], 0);
 	}