Visible to Intel only — GUID: GUID-830DE3A7-28F2-489E-A12A-1BB75F281349
Visible to Intel only — GUID: GUID-830DE3A7-28F2-489E-A12A-1BB75F281349
<span class='option'>_mm256_castpd128_pd256</span>
Typecasts 128-bit double-precision floating point values to 256-bit double-precision floating point values. No corresponding Intel® AVX instruction.
extern __m256d _mm256_castpd128_pd256(__m128d a); |
a |
128-bit float64 vector |
Performs a typecast operation from 128-bit double-precision floating point values to 256-bit double-precision floating point values.
The lower 128-bits of the 256-bit resulting vector contains the source vector values; the upper 128-bits of the resulting vector are undefined. This intrinsic does not introduce extra moves to the generated code.
A vector with 256-bit double-precision floating point values. The upper bits of the resulting vector are undefined.