_mm512_extractf64x4_pd
Classification
AVX-512, Swizzle, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VEXTRACTF64X4 ymm, zmm, imm8
Synopsis
 _mm512_extractf64x4_pd(__m512d a, int imm8);
Description
Extract 256 bits (composed of 4 packed double-precision (64-bit) floating-point elements) from "a", selected with "imm8", and store the result in "dst".
Operation
CASE imm8[0] OF
0: dst[255:0] := a[255:0]
1: dst[255:0] := a[511:256]
ESAC
dst[MAX:256] := 0