Function select

Source/astcenc_vecmathlib_sse_4.h:684–693

* @brief Return lanes from @c b if @c cond is set, else @c a. */

 * @brief Return lanes from @c b if @c cond is set, else @c a.
 */
ASTCENC_SIMD_INLINE vint4 select(vint4 a, vint4 b, vmask4 cond)
{
	__m128i condi = _mm_castps_si128(cond.m);

#if ASTCENC_SSE >= 41
	return vint4(_mm_blendv_epi8(a.m, b.m, condi));
#else
	return vint4(_mm_or_si128(_mm_and_si128(condi, b.m), _mm_andnot_si128(condi, a.m)));
#endif
}

// ============================================================================
// vfloat4 operators and functions