_mm256_maskz_rsqrt_ph
Classification
AVX-512, Elementary Math Functions, CPUID Test: AVX512_FP16
Header File
Instruction
VRSQRTPH ymm {z}, ymm
Synopsis
_mm256_maskz_rsqrt_ph(__mmask16 k, __m256h a);
Description
Compute the approximate reciprocal square root of packed half-precision (16-bit) floating-point elements in "a", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set). The maximum relative error for this approximation is less than 1.5*2^-12.
Operation
FOR i := 0 to 15
IF k[i]
dst.fp16[i] := (1.0 / SQRT(a.fp16[i]))
ELSE
dst.fp16[i] := 0
FI
ENDFOR
dst[MAX:256] := 0