Tracking Issue for missed BMI1, SSE2, SSE4.1, AVX2 intrinsics

[sayantn]

The feature gate is #[feature(simd_x86_updates)].

The Public API is 9 new intrinsics (probably overlooked in the simd_x86 feature). See #1178.

• BMI1

  • _tzcnt_u16

• AVX2

  • _mm_broadcastsi128_si256
  • _mm256_stream_load_si256

• SSE2

  • _mm_loadu_si16
  • _mm_storeu_si16
  • _mm_loadu_si32
  • _mm_storeu_si32
  • _mm_storeu_si64

• SSE4.1

  • _mm_stream_load_si128

Implementation History

It is debatable whether we should add _mm_malloc and _mm_free. These would be nice to have since they would open up dynamic memory allocation even in no_std environments.