tree 9ed4b3eed2a58ad4c14ec8e728fedf70bbb4d905
parent be96bd3fbffde908a392c830c856063e122791c1
author Richard Henderson <rth@twiddle.net> 1361047619 -0800
committer Blue Swirl <blauwirbel@gmail.com> 1361111337 +0000

host-utils: Use __int128_t for mul[us]64

Replace some x86_64 specific inline assembly with something that
all 64-bit hosts ought to optimize well.  At worst this becomes
a call to the gcc __multi3 routine, which is no worse than our
implementation in util/host-utils.c.

With gcc 4.7, we get identical code generation for x86_64.  We
now get native multiplication on ia64 and s390x hosts.  With minor
improvements to gcc we can get it for ppc64 as well.

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