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x64: Lower SIMD requirement to SSE4.1 from SSE4.2 #6206

Merged
merged 1 commit into from
Apr 14, 2023
Merged

x64: Lower SIMD requirement to SSE4.1 from SSE4.2 #6206

merged 1 commit into from
Apr 14, 2023

Commits on Apr 12, 2023

  1. x64: Lower SIMD requirement to SSE4.1 from SSE4.2 

    Cranelift only has one instruction SIMD which depends on SSE4.2 so this
commit adds a lowering rule for `pcmpgtq` which doesn't use SSE4.2 and
enables lowering the baseline requirement for SIMD support from SSE4.2
to SSE4.1.

The `has_sse42` setting is no longer enabled by default for Cranelift.
Additionally `enable_simd` no longer requires `has_sse42` on x64.
Finally the fuzz-generator for Wasmtime codegen settings now enables
flipping the `has_sse42` setting instead of unconditionally setting it
to `true`.

The specific lowering for `pcmpgtq` is copied from LLVM's lowering of
this instruction.
    @alexcrichton
    alexcrichton committed Apr 12, 2023
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