subject:"\[PATCH\] RISC\-V\: Use widening shift for scatter\/gather if applicable."

Re: [PATCH] RISC-V: Use widening shift for scatter/gather if applicable.

2024-05-17 Thread 钟居哲

LGTM juzhe.zh...@rivai.ai From: Robin Dapp Date: 2024-05-17 23:25 To: gcc-patches CC: rdapp.gcc; palmer; Kito Cheng; juzhe.zh...@rivai.ai; jeffreyalaw Subject: [PATCH] RISC-V: Use widening shift for scatter/gather if applicable. Hi, with the zvbb extension we can emit a widening shift for

[PATCH] RISC-V: Use widening shift for scatter/gather if applicable.

2024-05-17 Thread Robin Dapp

Hi, with the zvbb extension we can emit a widening shift for scatter/gather index preparation in case we need to multiply by 2 and zero extend. The patch also adds vwsll to the mode_idx attribute and removes the mode from shift-count operand of the insn pattern. Regtested on rv64gcv_zvfh_zvbb.