On Thu, Aug 9, 2018 at 5:00 PM, Alexander Monakov wrote:
> Hello,
>
> on x86-64, 32-bit division by constants uses mulsi3_highpart pattern that
> turns into 'mull ' instruction with source implicitly in eax and
> result in edx:eax. However, using 64-bit multiplication with zero-extended
> source
Hello,
on x86-64, 32-bit division by constants uses mulsi3_highpart pattern that
turns into 'mull ' instruction with source implicitly in eax and
result in edx:eax. However, using 64-bit multiplication with zero-extended
source would be preferable, as the imulq instruction accepts the magic
multi
