_mm512_mask_rsqrt_ph
Classification
AVX-512, Elementary Math Functions, CPUID Test: AVX512_FP16
Header File
Instruction
VRSQRTPH zmm {k}, zmm
Synopsis
_mm512_mask_rsqrt_ph(__m512h src, __mmask32 k, __m512h 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 writemask "k" (elements are copied from "src" 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 31
IF k[i]
dst.fp16[i] := (1.0 / SQRT(a.fp16[i]))
ELSE
dst.fp16[i] := src.fp16[i]
FI
ENDFOR
dst[MAX:512] := 0