oshi, Tejas Sanjay
>
> Subject: Zen4 tuning part 1 - cost tables
>
> Caution: This message originated from an External Source. Use proper
> caution when opening attachments, clicking links, or responding.
>
>
> Hi
> this patch updates cost of znver4 mostly based on data m
> > - COSTS_N_INSNS (5), /* cost of FADD and FSUB insns. */
> > - COSTS_N_INSNS (5), /* cost of FMUL instruction. */
> > + COSTS_N_INSNS (7), /* cost of FADD and FSUB insns. */
> > + COSTS_N_INSNS (7), /* cost of FMUL in
On Tue, Dec 6, 2022 at 11:01 AM Jan Hubicka via Gcc-patches
wrote:
>
> Hi
> this patch updates cost of znver4 mostly based on data measued by Agner Fog.
> Compared to previous generations x87 became bit slower which is probably not
> big deal (and we have minimal benchmarking coverage for it). On
Hi
this patch updates cost of znver4 mostly based on data measued by Agner Fog.
Compared to previous generations x87 became bit slower which is probably not
big deal (and we have minimal benchmarking coverage for it). One interesting
improvement is reducation of FMA cost. I also updated costs of
