[Headers][X86] Add constexpr support for some AVX512 masked extension/truncation intrinsics. #161984
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RKSimon
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…/truncation intrinsics. (llvm#161984) The following AVX[512] intrinsics are now constexpr: * _mm_cvtepi32_epi8 * _mm_cvtepi32_epi16 * _mm_cvtepi64_epi8 * _mm_cvtepi64_epi16 * _mm_cvtepi64_epi32 * _mm256_cvtepi32_epi8 * _mm256_cvtepi32_epi16 * _mm256_cvtepi64_epi8 * _mm256_cvtepi64_epi16 * _mm256_cvtepi64_epi32 * _mm256_mask_cvtepi64_epi32 * _mm256_maskz_cvtepi64_epi32 Fixes llvm#154539
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The following AVX[512] intrinsics are now constexpr:
These instrinsics coudnt be make constexpr:
_mm_mask_cvtepi32_epi16 _mm_maskz_cvtepi32_epi16
_mm_mask_cvtepi64_epi8 _mm_maskz_cvtepi64_epi8
_mm_mask_cvtepi64_epi16 _mm_maskz_cvtepi64_epi16
_mm_mask_cvtepi64_epi32 _mm_maskz_cvtepi64_epi32
_mm256_mask_cvtepi32_epi8 _mm256_maskz_cvtepi32_epi8
_mm256_mask_cvtepi32_epi16 _mm256_maskz_cvtepi32_epi16
_mm256_mask_cvtepi64_epi8 _mm256_maskz_cvtepi64_epi8
_mm256_mask_cvtepi64_epi16 _mm256_maskz_cvtepi64_epi16
Because these are not constexpr:
__builtin_ia32_pmovqw256_mask
__builtin_ia32_pmovqb256_mask
__builtin_ia32_pmovdw256_mask
__builtin_ia32_pmovdb256_mask
__builtin_ia32_pmovqd128_mask
__builtin_ia32_pmovqw128_mask
__builtin_ia32_pmovqb128_mask
__builtin_ia32_pmovdw128_mask
__builtin_ia32_pmovdb128_mask
Fixes #154539