On Tue, Dec 12, 2023 at 7:12 AM liuhongt wrote:
>
> x86 doesn't support horizontal reduction instructions, reduc_op_scal_m
> is emulated with vec_extract_half + op(half vector length)
> Take that into account when calculating cost for vectorization.
>
> Bootstrapped and regtested on x86_64-pc-linu
x86 doesn't support horizontal reduction instructions, reduc_op_scal_m
is emulated with vec_extract_half + op(half vector length)
Take that into account when calculating cost for vectorization.
Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}.
No big performance impact on SPEC2017 as measu
