_mm512_mask_rsqrt23_ps
Classification
KNC, Elementary Math Functions, CPUID Test: KNCNI
Header File
Instruction
VRSQRT23PS zmm {k}, m512
Synopsis
_mm512_mask_rsqrt23_ps(__m512 src, __mmask16 k, __m512 a);
Description
Calculates the reciprocal square root of packed single-precision (32-bit) floating-point elements in "a" to 23 bits of accuracy and stores the result in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 15
i := j*32
IF k[j]
dst[i+31:i] := Sqrt(1.0 / a[i+31:i])
ELSE
dst[i+31:i] := src[i+31:i]
FI
ENDFOR
dst[MAX:512] := 0