_mm512_maskz_shrdi_epi64
Classification
AVX-512, Shift, CPUID Test: AVX512_VBMI2
Header File
immintrin.h
Instruction
VPSHRDQ zmm {z}, zmm, zmm, imm8
Synopsis
 _mm512_maskz_shrdi_epi64(__mmask8 k, __m512i a, __m512i b, int imm8);
Description
Concatenate packed 64-bit integers in "b" and "a" producing an intermediate 128-bit result. Shift the result right by "imm8" bits, and store the lower 64-bits in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
FOR j := 0 to 7
	i := j*64
	IF k[j]
		dst[i+63:i] := ((b[i+63:i] << 64)[127:0] | a[i+63:i]) >> imm8[5:0]
	ELSE
		dst[i+63:i] := 0
	FI
ENDFOR
dst[MAX:512] := 0