Catcrafts/Crafter.Math
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ARM NEON

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NEON backend for VectorF32 on AArch64: one float32x4_t per vector
(Len * Packing <= 4), with a vectorised sin/cos port of the SSE helpers.

VectorF16 gets a native float16x8_t path when the target has ARMv8.2-FP16
arithmetic. Without it VectorF16 aliases VectorF32, which converts
fp16 <-> fp32 on Load/Store.

The scalar fallback gains the batched Dot that MatrixRowMajor relies on.
Test tiers added for armv8-a and armv8.2-a+fp16.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
Jorijn van der Graaf 2026-10-06 17:13:54 +02:00
commit 0c55e76873
Signed by: jorijnvdgraaf
GPG key ID: 2937E59CDCC1BCFB
6 changed files with 825 additions and 17 deletions
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interfaces/Crafter.Math-Basic.cppm
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@ -11,7 +11,7 @@ namespace Crafter {
return degrees * (std::numbers::pi / 180);
}
#if (defined(__x86_64) && !defined(__AVX512FP16__)) || defined(__riscv_vector) || !defined(__FLT16_MAX__)
#if (defined(__x86_64) && !defined(__AVX512FP16__)) || defined(__riscv_vector) || (defined(__aarch64__) && defined(__ARM_NEON) && !defined(__ARM_FEATURE_FP16_VECTOR_ARITHMETIC)) || !defined(__FLT16_MAX__)
export template <std::uint32_t Len, std::uint32_t Packing>
using VectorF16 = VectorF32<Len, Packing>;
#endif