commit 301799b803fc9f3e2adaad32b1ccace736bbe7cc
author Andy Polyakov <appro@openssl.org> Sat Jun 04 12:20:45 2011 +0000
committer Andy Polyakov <appro@openssl.org> Sat Jun 04 12:20:45 2011 +0000
tree 0edc73d8425ac47b5124104760cb0294c53b214f
parent 8d515259e2a4631a5b42f1a072b0ff6f8eba189c

x86[_64]cpuid.pl: add function accessing rdrand instruction.

crypto/x86cpuid.pl

diff --git a/crypto/x86cpuid.pl b/crypto/x86cpuid.pl
index 70c8a2d..6595ff3 100644
--- a/crypto/x86cpuid.pl
+++ b/crypto/x86cpuid.pl
@@ -442,6 +442,18 @@
 &function_end("OPENSSL_instrument_bus2");
 }
 
+&function_begin_B("OPENSSL_ia32_rdrand");
+	&mov	("ecx",8);
+&set_label("loop");
+	&rdrand	("eax");
+	&jc	(&label("break"));
+	&loop	(&label("loop"));
+&set_label("break");
+	&cmp	("eax",0);
+	&cmove	("eax","ecx");
+	&ret	();
+&function_end_B("OPENSSL_ia32_rdrand");
+
 &initseg("OPENSSL_cpuid_setup");
 
 &asm_finish();