On Sun, 14 Jul 2019, Uros Bizjak wrote: > > This patch is for expanding roundeven inline for SSE4.1 and later. > > Note that this patch is to be applied on top of > > <https://gcc.gnu.org/ml/gcc-patches/2019-06/msg01828.html>. The patch > > is bootstrapped and regression tested on x86_64-linux-gnu. > > Actually, your patch at [1] is the way to go, but you need several > other changes to get x87 mode switching in order. Please also note > that there is no corresponding non-SSE4 ix86_expand_... function for > roundeven, so non-SSE4 SSE FP-math <rounding_insn><mode>2 expander has > to be disabled for ROUNDEVEN int iterator. Please see (otherwise > untested) attached patch which fixes both issues.
This needs md.texi updates to document the new roundeven<mode> insn pattern. -- Joseph S. Myers jos...@codesourcery.com
