On Wed, Dec 7, 2022 at 7:36 AM Hongyu Wang <hongyu.w...@intel.com> wrote:
>
> For Alderlake there is similar issue like PR 81616, enable
> avoid_fma256_chain will also benefit on Intel latest platforms
> Alderlake and Sapphire Rapids.
>
> Bootstrapped/regtested on x86_64-pc-linux-gnu{-m32,}.
>
> Ok for master?
>
> gcc/ChangeLog:
>
> * config/i386/x86-tune.def (X86_TUNE_AVOID_256FMA_CHAINS): Add
> m_SAPPHIRERAPIDS, m_ALDERLAKE and m_CORE_ATOM.
OK.
Thanks,
Uros.
> ---
> gcc/config/i386/x86-tune.def | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def
> index cd66f335113..db85de20bae 100644
> --- a/gcc/config/i386/x86-tune.def
> +++ b/gcc/config/i386/x86-tune.def
> @@ -499,7 +499,8 @@ DEF_TUNE (X86_TUNE_AVOID_128FMA_CHAINS,
> "avoid_fma_chains", m_ZNVER)
>
> /* X86_TUNE_AVOID_256FMA_CHAINS: Avoid creating loops with tight 256bit or
> smaller FMA chain. */
> -DEF_TUNE (X86_TUNE_AVOID_256FMA_CHAINS, "avoid_fma256_chains", m_ZNVER2 |
> m_ZNVER3)
> +DEF_TUNE (X86_TUNE_AVOID_256FMA_CHAINS, "avoid_fma256_chains", m_ZNVER2 |
> m_ZNVER3
> + | m_ALDERLAKE | m_SAPPHIRERAPIDS | m_CORE_ATOM)
>
> /* X86_TUNE_V2DF_REDUCTION_PREFER_PHADDPD: Prefer haddpd
> for v2df vector reduction. */
> --
> 2.18.1
>
