[Headers][X86] Add constexpr support for some AVX512 masked extension/truncation intrinsics. #158663
Conversation
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@RKSimon these functions: llvm-project/clang/lib/Headers/avx512vlbwintrin.h Lines 1447 to 1459 in f5d3cf4 Can't be made constexpr because __builtin_ia32_pmovwb128_mask is not constexpr.
Is there a plan to remove llvm-project/clang/lib/Headers/avx512vlbwintrin.h Lines 1485 to 1490 in f5d3cf4 |
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At the moment we need to keep _mm_mask_cvtepi16_epi8 etc as the selection mask only acts on part of the vector (we're truncating v8i16 to v8i8, using the mask8 on that and passing through all the upper half of the passthrough to create a v16i8) - the best we might be able to do is a custom __builtin_ia32_selectb_64 but it'll be messy - we'll have to come back to it later, maybe when the _mm512_kunpack intrinsics are constexpr? |
RKSimon
changed the title
The following AVX[512] intrinsics are now constexpr:
_mm512_mask_cvtepi8_epi32_mm512_maskz_cvtepi8_epi32_mm512_mask_cvtepi8_epi64_mm512_maskz_cvtepi8_epi64_mm512_mask_cvtepi16_epi32_mm512_maskz_cvtepi16_epi32_mm512_mask_cvtepi16_epi64_mm512_maskz_cvtepi16_epi64_mm512_mask_cvtepi32_epi64_mm512_maskz_cvtepi32_epi64_mm512_mask_cvtepu8_epi32_mm512_maskz_cvtepu8_epi32_mm512_mask_cvtepu8_epi64_mm512_maskz_cvtepu8_epi64_mm512_mask_cvtepu16_epi32_mm512_maskz_cvtepu16_epi32_mm512_mask_cvtepu16_epi64_mm512_maskz_cvtepu16_epi64_mm512_mask_cvtepu32_epi64_mm512_maskz_cvtepu32_epi64_mm512_mask_cvtepi8_epi16_mm512_maskz_cvtepi8_epi16_mm512_mask_cvtepu8_epi16_mm512_maskz_cvtepu8_epi16_mm_cvtepi16_epi8_mm256_cvtepi16_epi8_mm256_mask_cvtepi16_epi8_mm256_maskz_cvtepi16_epi8This PR is part 1 of a series of PRs fixing #154539