Ok. Just sent V2. I will adjust comment and send V3 again :)
juzhe.zh...@rivai.ai
From: Robin Dapp
Date: 2023-06-20 16:55
To: juzhe.zh...@rivai.ai; gcc-patches
CC: rdapp.gcc; kito.cheng; Kito.cheng; palmer; palmer; jeffreyalaw
Subject: Re: [PATCH] RISC-V: Optimize codegen of VLA SLP
> + /* Step 2: VID AND -NPATTERNS:
> + { 0&-4, 1&-4, 2&-4, 3 &-4, 4 &-4, 5 &-4, 6 &-4, 7 &-4, ... }
> + */
Before that, just add something simple like:
We want to create a pattern where value[ix] = floor (ix / NPATTERNS).
As NPATTERNS is always a power of two we can rewrite this as
= ix & -NPATTERNS.
Regards
Robin
