Re: [PATCH 5/5] RISC-V: Support vmsxx.vx for autovec comparison of vec and imm

2024-03-01 Thread Andrew Waterman
On Fri, Mar 1, 2024 at 4:07 AM Robin Dapp wrote: > > Hi Han, > > in addition to what Juzhe mentioned (and that late-combine is going > to handle such cases) it should be noted that register pressure > should not be the only consideration here. Many uarchs have a higher > latency for register-file

Re: [PATCH 5/5] RISC-V: Support vmsxx.vx for autovec comparison of vec and imm

2024-03-01 Thread Robin Dapp
Hi Han, in addition to what Juzhe mentioned (and that late-combine is going to handle such cases) it should be noted that register pressure should not be the only consideration here. Many uarchs have a higher latency for register-file-crossing moves. At least without spilling the vv variant is p

Re:[PATCH 5/5] RISC-V: Support vmsxx.vx for autovec comparison of vec and imm

2024-02-29 Thread 钟居哲
Hi, han. My comment for this patch is same as  [PATCH 3/5] RISC-V: Support vmfxx.vf for autovec comparison of vec and imm     -- Original -- From:  "demin.han"