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Rollup merge of #133395 - calebzulawski:simd_relaxed_fma, r=workingjubilee

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Add simd_relaxed_fma intrinsic

Adds compiler support for https://github.com/rust-lang/portable-simd/issues/387#issuecomment-2337169786

r? `@workingjubilee`

cc `@RalfJung` is this kind of nondeterminism a problem for miri/opsem?
This commit is contained in:
Matthias Krüger 2024-12-03 07:48:33 +01:00 • committed by GitHub
commit 9709334061
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7 changed files with 27 additions and 2 deletions
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compiler/rustc_codegen_gcc/src/intrinsic/simd.rs
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@ -772,6 +772,7 @@ pub fn generic_simd_intrinsic<'a, 'gcc, 'tcx>(
sym::simd_flog => "log",
sym::simd_floor => "floor",
sym::simd_fma => "fma",
sym::simd_relaxed_fma => "fma", // FIXME: this should relax to non-fused multiply-add when necessary
sym::simd_fpowi => "__builtin_powi",
sym::simd_fpow => "pow",
sym::simd_fsin => "sin",