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[wasm-simd] Add a flag to allow SSSE3 SIMD codegen

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Bug: v8:11154
Change-Id: Idc1ae98c2f4c0b2924f34c76b56f230cb091c16e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2600360
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71855}
This commit is contained in:
Deepti Gandluri 2020-12-21 16:31:50 -08:00 committed by Commit Bot
parent 7f35fe4786
commit 8c48059844
2 changed files with 6 additions and 1 deletions
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6
src/codegen/x64/assembler-x64-inl.h
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@ -17,7 +17,11 @@ namespace internal {
bool CpuFeatures::SupportsOptimizer() { return true; }
bool CpuFeatures::SupportsWasmSimd128() { return IsSupported(SSE4_1); }
bool CpuFeatures::SupportsWasmSimd128() {
if (IsSupported(SSE4_1)) return true;
if (FLAG_wasm_simd_ssse3_codegen) return true;
return false;
}
// -----------------------------------------------------------------------------
// Implementation of Assembler

1
src/flags/flag-definitions.h
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@ -907,6 +907,7 @@ DEFINE_BOOL(wasm_grow_shared_memory, true,
DEFINE_BOOL(wasm_simd_post_mvp, false,
"allow experimental SIMD operations for prototyping that are not "
"included in the current proposal")
DEFINE_BOOL(wasm_simd_ssse3_codegen, false, "allow wasm SIMD SSSE3 codegen")
DEFINE_IMPLICATION(wasm_simd_post_mvp, experimental_wasm_simd)
DEFINE_BOOL(wasm_code_gc, true, "enable garbage collection of wasm code")