Re: [PATCH] RISC-V: Use vmv1r.v instead of vmv.v.v for fma output reloads [PR114200].

LGTM juzhe.zh...@rivai.ai From: Robin Dapp Date: 2024-03-06 21:44 To: gcc-patches; palmer; Kito Cheng; juzhe.zh...@rivai.ai CC: rdapp.gcc; jeffreyalaw Subject: [PATCH] RISC-V: Use vmv1r.v instead of vmv.v.v for fma output reloads [PR114200]. Hi, three-operand instructions like vmacc

[PATCH] RISC-V: Use vmv1r.v instead of vmv.v.v for fma output reloads [PR114200].

Hi, three-operand instructions like vmacc are modeled with an implicit output reload when the output does not match one of the operands. For this we use vmv.v.v which is subject to length masking. In a situation where the current vl is less than the full vlenb and the fma's result value is used