core_arch::x86::avx512f intrinsics with rounding do not compile

[TechPizzaDev]

I tried this code:

core_arch::x86::avx512f::_mm512_cvtps_ph::<_MM_FROUND_TO_NEAREST_INT>(value)

I expected this to compile.
Instead, this happened:

error[E0080]: evaluation of `std::arch::x86_64::_mm512_cvtps_ph::<0>::{constant#0}` failed

                static_assert_sae!(SAE);
      |         ^^^^^^^^^^^^^^^^^^^^^^^ evaluation panicked: Invalid IMM value

It seems that the assertion macros static_assert_sae and static_assert_mantissas_sae are not checking the flags properly and error on most valid values.
https://github.com/rust-lang/stdarch/blob/e907456b2e10622ccd854a3bba8d02ce170b5dbb/crates/core_arch/src/x86/macros.rs#L18-L22

As an added note, some docs seem to be inconsistent with Intel® Intrinsics Guide:
Rustdoc of _mm512_cvtps_ph only mentions _MM_FROUND_NO_EXC, while Guide mentions many flags.
Rustdoc of _mm_maskz_cvt_roundps_ph mentions flags with _MM_FROUND_NO_EXC, while Guide does not.

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rustc --version --verbose:

rustc 1.88.0-nightly (b4c8b0c3f 2025-04-25)
binary: rustc
commit-hash: b4c8b0c3f0533bb342a4873ff59bdad3883ab8e3
commit-date: 2025-04-25
host: x86_64-unknown-linux-gnu
release: 1.88.0-nightly
LLVM version: 20.1.2