_mm512_maskz_rsqrt28_round_ps
Classification
AVX-512, Elementary Math Functions, CPUID Test: AVX512ER
Header File
immintrin.h
Instruction
VRSQRT28PS zmm {z}, zmm {sae}
Synopsis
 _mm512_maskz_rsqrt28_round_ps(__mmask16 k, __m512 a, int sae);
Description
Compute the approximate reciprocal square root of packed single-precision (32-bit) floating-point elements in "a", 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 2^-28. [sae_note]
Operation
FOR j := 0 to 15
	i := j*32
	IF k[j]
		dst[i+31:i] := (1.0 / SQRT(a[i+31:i]))
	ELSE
		dst[i+31:i] := 0
	FI
ENDFOR