message: F16C half-to-float conversion improvement
diff: @@ -133,7 +133,7 @@ public:
  static float float16_to_float32(uint16_t value) {
  #if defined(ENOKI_X86_F16C)
  - return _mm_cvtss_f32(_mm_cvtph_ps(_mm_set1_epi16((int16_t) value)));
  + return _mm_cvtss_f32(_mm_cvtph_ps(_mm_cvtsi32_si128((int32_t) value)));
  #elif defined(ENOKI_ARM_NEON)
  return (float) memcpy_cast<__fp16>(value);
  #else
  