_mm_rcp14_sd
Classification
AVX-512, Elementary Math Functions, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VRCP14SD xmm, xmm, xmm
Synopsis
 _mm_rcp14_sd(__m128d a, __m128d b);
Description
Compute the approximate reciprocal of the lower double-precision (64-bit) floating-point element in "b", store the result in the lower element of "dst", and copy the upper element from "a" to the upper element of "dst". The maximum relative error for this approximation is less than 2^-14.
Operation
dst[63:0] := (1.0 / b[63:0])
dst[127:64] := a[127:64]
dst[MAX:128] := 0