From f4d456408d9d7bca31f34765d1a05fbd9fa55826 Mon Sep 17 00:00:00 2001
From: Andy Polyakov <appro@openssl.org>
Date: Fri, 14 Feb 2014 17:24:12 +0100
Subject: x86[_64]cpuid.pl: add low-level RDSEED.

---
 crypto/perlasm/x86_64-xlate.pl | 13 +++++++++++++
 crypto/perlasm/x86asm.pl       |  8 ++++++++
 2 files changed, 21 insertions(+)

(limited to 'crypto/perlasm')

diff --git a/crypto/perlasm/x86_64-xlate.pl b/crypto/perlasm/x86_64-xlate.pl
index ed74b85ac9..4dd7f5252d 100755
--- a/crypto/perlasm/x86_64-xlate.pl
+++ b/crypto/perlasm/x86_64-xlate.pl
@@ -778,6 +778,19 @@ my $rdrand = sub {
     }
 };
 
+my $rdseed = sub {
+    if (shift =~ /%[er](\w+)/) {
+      my @opcode=();
+      my $dst=$1;
+	if ($dst !~ /[0-9]+/) { $dst = $regrm{"%e$dst"}; }
+	rex(\@opcode,0,$1,8);
+	push @opcode,0x0f,0xc7,0xf8|($dst&7);
+	@opcode;
+    } else {
+	();
+    }
+};
+
 sub rxb {
  local *opcode=shift;
  my ($dst,$src1,$src2,$rxb)=@_;
diff --git a/crypto/perlasm/x86asm.pl b/crypto/perlasm/x86asm.pl
index 17abf92297..dcbc738516 100644
--- a/crypto/perlasm/x86asm.pl
+++ b/crypto/perlasm/x86asm.pl
@@ -131,6 +131,14 @@ sub ::rdrand
     {	&::generic("rdrand",@_);	}
 }
 
+sub ::rdseed
+{ my ($dst)=@_;
+    if ($dst =~ /(e[a-dsd][ixp])/)
+    {	&::data_byte(0x0f,0xc7,0xf8|$regrm{$dst});	}
+    else
+    {	&::generic("rdrand",@_);	}
+}
+
 sub rxb {
  local *opcode=shift;
  my ($dst,$src1,$src2,$rxb)=@_;
-- 
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