Stuart Cook 5b0f658922
Rollup merge of #138003 - sayantn:new-amx, r=Amanieu
Add the new `amx` target features and the `movrs` target feature

Adds 5 new `amx` target features included in LLVM20. These are guarded under `x86_amx_intrinsics` (#126622)

 - `amx-avx512`
 - `amx-fp8`
 - `amx-movrs`
 - `amx-tf32`
 - `amx-transpose`

Adds the `movrs` target feature (from #137976).

`@rustbot` label O-x86_64 O-x86_32 T-compiler A-target-feature
r? `@Amanieu`
2025-04-02 13:10:36 +11:00
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