_mm256_shldi_epi32
Classification
AVX-512, Shift, CPUID Test: AVX512_VBMI2
Header File
Instruction
VPSHLDD ymm, ymm, ymm, imm8
Synopsis
_mm256_shldi_epi32(__m256i a, __m256i b, int imm8);
Description
Concatenate packed 32-bit integers in "a" and "b" producing an intermediate 64-bit result. Shift the result left by "imm8" bits, and store the upper 32-bits in "dst".
Operation
FOR j := 0 to 7
i := j*32
tmp[63:0] := ((a[i+31:i] << 32)[63:0] | b[i+31:i]) << imm8[4:0]
dst[i+31:i] := tmp[63:32]
ENDFOR
dst[MAX:256] := 0