Re: More znver4 x86-tune flags

2023-01-09 Thread Hongtao Liu via Gcc-patches
On Tue, Jan 10, 2023 at 12:32 PM Jan Hubicka via Gcc-patches wrote: > > > Hi, > this patch adds more tunes for zen4: > - new tunes for avx512 scater instructions. >In micro benchmarks these seems consistent loss compared to open-coded coe > - disable use of gather for zen4 >While these a

More znver4 x86-tune flags

2023-01-09 Thread Jan Hubicka via Gcc-patches
Hi, this patch adds more tunes for zen4: - new tunes for avx512 scater instructions. In micro benchmarks these seems consistent loss compared to open-coded coe - disable use of gather for zen4 While these are win for a micro benchmarks (based on TSVC), enabling gather is a loss for par