Re: Did clang 14 lose some intrinsics support?
- Reply: Dimitry Andric : "Re: Did clang 14 lose some intrinsics support?"
- In reply to: Christian Weisgerber : "Did clang 14 lose some intrinsics support?"
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Date: Sun, 25 Sep 2022 19:02:08 UTC
Christian Weisgerber <naddy@mips.inka.de> writes: > Did we lose support for SSSE3 and AVX2 intrinsics on amd64 with > clang 14? __builtin_* appear unstable unlike _mm* intrinsics. Clang 15 seems to hide more but I'm not sure about the cause (need bisecting). ===> clang version 15.0.1 #define SSE2_SUPPORTED 1 #define SSE_SUPPORTED 1 ===> clang version 15.0.1 with -march=native #define AVX_SUPPORTED 1 #define FMA_SUPPORTED 1 #define SSE2_SUPPORTED 1 #define SSE4_1_SUPPORTED 1 #define SSE_SUPPORTED 1 > #if __has_builtin(__builtin_ia32_pabsd128) > #define SSSE3_SUPPORTED 1 > #endif [...] > #if __has_builtin(__builtin_ia32_pabsd256) > #define AVX2_SUPPORTED 1 > #endif See https://github.com/llvm/llvm-project/commit/e5147f82e1cb - Instead of __builtin_ia32_pabsd128 maybe use _mm_abs_epi32 - Instead of __builtin_ia32_pabsd256 maybe use _mm256_abs_epi32