8081778: Use Intel x64 CPU instructions for RSA acceleration
Summary: Add intrinsics for BigInteger squareToLen and mulAdd methods.
Reviewed-by: kvn, jrose
sgehwolf [Fri, 12 Jun 2015 16:09:45 +0100] rev 31128
8087120: [GCC5] java.lang.StackOverflowError on Zero JVM initialization on non x86 platforms.
Summary: Use __builtin_frame_address(0) rather than returning address of local variable.
Reviewed-by: dholmes