Evandro Menezes wrote: > > The division variant should use the same latency reduction trick I > > mentioned for sqrt. > > I don't think that it applies here, since it doesn't have to deal with > special cases.
No it applies as it's exactly the same calculation: x * rsqrt(y) and x * recip(y). In both cases you don't need the final result of rsqrt(y) or recip(y), avoiding a multiply. Given these sequences are high latency this saving is actually quite important. Wilco
