_mm_rsqrt_ps
Classification
SSE_ALL, Elementary Math Functions, CPUID Test: SSE
Header File
Instruction
RSQRTPS xmm, xmm
Synopsis
_mm_rsqrt_ps(__m128 a);
Description
Compute the approximate reciprocal square root of packed single-precision (32-bit) floating-point elements in "a", and store the results in "dst". The maximum relative error for this approximation is less than 1.5*2^-12.
Operation
FOR j := 0 to 3
i := j*32
dst[i+31:i] := (1.0 / SQRT(a[i+31:i]))
ENDFOR