subject:"\[PATCH\] PowerPC\: Optimize DImode \-> vector store."

Re: [PATCH] PowerPC: Optimize DImode -> vector store.

2020-07-06 Thread Segher Boessenkool

Hi! On Wed, Jul 01, 2020 at 06:43:32PM -0400, Michael Meissner wrote: > This patch fixes a PR that I noticed several years ago during power8 > development. I noticed that the compiler would often create a two element > vector and store the vector. > > Particularly for DImode on power8, this

[PATCH] PowerPC: Optimize DImode -> vector store.

2020-07-01 Thread Michael Meissner via Gcc-patches

This patch fixes a PR that I noticed several years ago during power8 development. I noticed that the compiler would often create a two element vector and store the vector. Particularly for DImode on power8, this could involve two direct moves and a XXPERMDI to glue the two parts together. On