_mm256_extracti64x2_epi64
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512DQ
Header File
immintrin.h
Instruction
VEXTRACTI64X2 xmm, ymm, imm8
Synopsis
 _mm256_extracti64x2_epi64(__m256i a, int imm8);
Description
Extract 128 bits (composed of 2 packed 64-bit integers) from "a", selected with "imm8", and store the result in "dst".
Operation
CASE imm8[0] OF
0: dst[127:0] := a[127:0]
1: dst[127:0] := a[255:128]
ESAC
dst[MAX:128] := 0