_mm256_maskz_mulhrs_epi16
Classification
AVX-512, Arithmetic, CPUID Test: AVX512BW
Header File
Instruction
VPMULHRSW ymm {z}, ymm, ymm
Synopsis
_mm256_maskz_mulhrs_epi16(__mmask16 k, __m256i a, __m256i b);
Description
Multiply packed signed 16-bit integers in "a" and "b", producing intermediate signed 32-bit integers. Truncate each intermediate integer to the 18 most significant bits, round by adding 1, and store bits [16:1] to "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
FOR j := 0 to 15
i := j*16
IF k[j]
tmp[31:0] := ((SignExtend32(a[i+15:i]) * SignExtend32(b[i+15:i])) >> 14) + 1
dst[i+15:i] := tmp[16:1]
ELSE
dst[i+15:i] := 0
FI
ENDFOR
dst[MAX:256] := 0