tree 56339a9d32d57eac9d7d5c70c54eca00763daee0
parent f540166b7dfdf4ec2057ac322d8cbfd0691e1d65
author Richard Henderson <rth@twiddle.net> 1361047620 -0800
committer Blue Swirl <blauwirbel@gmail.com> 1361111338 +0000

host-utils: Improve mulu64 and muls64

The new formulation makes better use of add-with-carry type insns
that the host may have.  Use gcc's sign adjustment trick to avoid
having to perform a 128-bit negation.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>