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Disable P10 optimizations on IBMi

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IBMi does not yet support prefixed instructions, p10 features need
to be disabled until OS support is available.

Change-Id: Idca7d6ebd791b06ef8f1f8419badd1a3db0f277f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3562980
Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#79718}
This commit is contained in:
Milad Fa 2022-04-01 10:14:40 -04:00 committed by V8 LUCI CQ
parent 4bbe174c88
commit e70ccb2f7f
1 changed files with 6 additions and 0 deletions
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6
src/codegen/ppc/assembler-ppc.cc
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@ -76,7 +76,13 @@ void CpuFeatures::ProbeImpl(bool cross_compile) {
#else
base::CPU cpu;
if (cpu.part() == base::CPU::kPPCPower10) {
// IBMi does not yet support prefixed instructions introduced on Power10.
// Run on P9 mode until OS adds support.
#if defined(__PASE__)
supported_ |= (1u << PPC_9_PLUS);
#else
supported_ |= (1u << PPC_10_PLUS);
#endif
} else if (cpu.part() == base::CPU::kPPCPower9) {
supported_ |= (1u << PPC_9_PLUS);
} else if (cpu.part() == base::CPU::kPPCPower8) {