[Bug target/125387] riscv: smuldi3_highpart cost too high

[law at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125387

--- Comment #1 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Created attachment 64608
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64608&action=edit
Raphael's patch from a few years back