On Wed, 16 Nov 2022 23:12:28 GMT, Vladimir Ivanov <vliva...@openjdk.org> wrote:
>> Volodymyr Paprotski has updated the pull request incrementally with one >> additional commit since the last revision: >> >> redo register alloc with explicit func params > > src/hotspot/cpu/x86/stubGenerator_x86_64_poly.cpp line 756: > >> 754: >> 755: // Store R^8-R for later use >> 756: __ evmovdquq(Address(rsp, 64*0), B0, Assembler::AVX_512bit); > > Could these vector spills be eliminated? I counted 8 spare zmm registers > available across the vector loop (xmm7-xmm12, xmm30, xmm31). > > And here's what is explicitly used in `process256Loop`: > > D0 D1 = xmm2-xmm3 > B0 B1 B2 B3 B4 B5 = xmm19-xmm24 > TMP = xmm6 > A0 A1 A2 A3 A4 A5 = xmm13-xmm18 > R0 R1 R2 R1P R2P = xmm25-xmm29 > T0 T1 T2 T3 T4 T5 = xmm0-xmm5 Interesting!! Let me try that! ------------- PR: https://git.openjdk.org/jdk/pull/10582
