Re: [PATCH] rs6000: Set param_vect_partial_vector_usage as 1 for P10

2020-11-25 Thread Segher Boessenkool
Hi! On Wed, Nov 25, 2020 at 02:02:16PM +0800, Kewen.Lin wrote: > This patch is to set param_vect_partial_vector_usage as 1 on P10 > by default. Due to the unexpected performance on Power9 of those > vector with length instructions, we didn't enable vectorization > with partial vectors before. So

[PATCH] rs6000: Set param_vect_partial_vector_usage as 1 for P10

2020-11-24 Thread Kewen.Lin via Gcc-patches
Hi, This patch is to set param_vect_partial_vector_usage as 1 on P10 by default. Due to the unexpected performance on Power9 of those vector with length instructions, we didn't enable vectorization with partial vectors before. Some recent testings show that they perform expectedly on Power10 now