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

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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.
This commit is contained in:
Alex Crichton
2023-04-14 12:24:43 -05:00
committed by GitHub
parent 26f9ce02bc
commit 2d25db047f
8 changed files with 62 additions and 15 deletions
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2
cranelift/filetests/filetests/isa/x64/simd-cmp-avx.clif
View File

@@ -1,6 +1,6 @@
test compile precise-output
set enable_simd
target x86_64 has_avx
target x86_64 sse42 has_avx
function %i8x16_eq(i8x16, i8x16) -> i8x16 {
block0(v0: i8x16, v1: i8x16):

3
cranelift/filetests/filetests/runtests/simd-icmp-sgt.clif
View File

@@ -2,7 +2,8 @@ test interpret
test run
set enable_simd
target x86_64
target x86_64 has_avx
target x86_64 sse42
target x86_64 sse42 has_avx
target aarch64
target s390x