On Sat, 12 Mar 2022 23:22:16 GMT, Quan Anh Mai <d...@openjdk.java.net> wrote:
>> Jatin Bhateja has updated the pull request incrementally with one additional >> commit since the last revision: >> >> 8279508: Creating separate test for round double under feature check. > > src/hotspot/cpu/x86/c2_MacroAssembler_x86.cpp line 4161: > >> 4159: movl(scratch, 1056964608); >> 4160: movq(xtmp1, scratch); >> 4161: vbroadcastss(xtmp1, xtmp1, vec_enc); > > An `evpbroadcastd` would reduce this by one instruction I guess? Anyway an `evpbroadcastd xmm, r` has around 5 latency on the gpr so I think you could just put the constant in the constant table and use `vbroadcastsd` ------------- PR: https://git.openjdk.java.net/jdk/pull/7094
