On Tuesday, 10 September 2019 at 04:13:25 UTC, Newbie2019 wrote: > I need _umul128 to do the fast math, is there a way to made > it work for posix ? > > On windows I can use _umul128, is there a ASM or work around in > LDC to do this on posix ? I need this to work: __uint128_t r = uint64_t * uint64_t;