Function store_nbytes

Source/astcenc_vecmathlib_avx2_8.h:534–540

* @brief Store lowest N (vector width) bytes into an unaligned address. */

 * @brief Store lowest N (vector width) bytes into an unaligned address.
 */
ASTCENC_SIMD_INLINE void store_nbytes(vint8 a, uint8_t* p)
{
	// This is the most logical implementation, but the convenience intrinsic
	// is missing on older compilers (supported in g++ 9 and clang++ 9).
	// _mm_storeu_si64(ptr, _mm256_extracti128_si256(v.m, 0))
	_mm_storel_epi64(reinterpret_cast<__m128i*>(p), _mm256_extracti128_si256(a.m, 0));
}

/**
 * @brief Pack low 8 bits of N (vector width) lanes into bottom of vector.