https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127900
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> --- Created attachment 65852 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65852&action=edit Patch that improves umul<mode>3_highpart Prototype patch that improves umul<mode>3_highpart: mulh: movq %rdi, %rdx mulx %rsi, %rax, %rax ret Other _higpart patterns should be handled in a similar way.
