A.5.269 RCPSS: Scalar Single-Precision FP Reciprocal
RCPSS xmm1,xmm2/m128 ; F3 0F 53 /r [KATMAI,SSE]
RCPSS returns an approximation of the reciprocal of the lower single-
precision FP value from xmm2/m32; the upper three fields are passed
through from xmm1. The maximum error for this approximation is: |Error|
<= 1.5 x 2^-12