_mm512_maskz_rsqrt_ph
Classification
AVX-512, Elementary Math Functions, CPUID Test: AVX512_FP16
Header File
immintrin.h
Instruction
VRSQRTPH zmm {z}, zmm
Synopsis
 _mm512_maskz_rsqrt_ph(__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 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 31
	IF k[i]
		dst.fp16[i] := (1.0 / SQRT(a.fp16[i]))
	ELSE
		dst.fp16[i] := 0
	FI
ENDFOR
dst[MAX:512] := 0