https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103641
--- Comment #19 from Devin Hussey <husseydevin at gmail dot com> --- > The new costs on AArch64 have a vector multiplication cost of 4, which is > very reasonable. Would this include multv2di3 by any chance? Because another thing I noticed is that GCC is also trying to multiply 64-bit numbers like it's free but it just ends up scalarizing.