_mm_mask_rcp_ph
Classification
AVX-512, Elementary Math Functions, CPUID Test: AVX512_FP16
Header File
Instruction
VRCPPH xmm {k}, xmm
Synopsis
_mm_mask_rcp_ph(__m128h src, __mmask8 k, __m128h a);
Description
Compute the approximate reciprocal 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 7
IF k[i]
dst.fp16[i] := (1.0 / a.fp16[i])
ELSE
dst.fp16[i] := src.fp16[i]
FI
ENDFOR
dst[MAX:128] := 0