Re: [Qemu-devel] [PATCH 0/2] Improve 128-bit multiply primitives

2013-01-28 Thread Andreas Färber
Am 28.01.2013 19:52, schrieb Richard Henderson: > Richard Henderson (2): > host-utils: Use __int128 for mul[us]64 > host-utils: Improve mulu64 and muls64 Please fix Coding Style warnings in the latter (e.g., no space before parenthesis, spacing aroung = ). More importantly I wonder if we coul

[Qemu-devel] [PATCH 0/2] Improve 128-bit multiply primitives

2013-01-28 Thread Richard Henderson
This improves code generation for mul[us]64 for all hosts. In the case of ia64 and s390x we see immediate benefit as we get to use the native 128-bit multiply insn. In the case of ppc64, we need a patch to gcc to enable this; I hope to get such a patch into gcc 4.8.0, but it may have to wait for