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User:Bjacob/ArithmeticTimingDifferences (view source)
Revision as of 22:30, 6 June 2013
, 6 June 2013→Some Intel CPUs have abnormally slow comparisons with NaN and denormals, even with SSE2, DAZ and FTZ
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=== Some Intel CPUs have abnormally slow comparisons with NaN and denormals, even with SSE2, DAZ and FTZ === | === Some Intel CPUs have abnormally slow comparisons with NaN and denormals, even with SSE2, DAZ and FTZ === | ||
This is another way in | This is another way in which the notion that NaN issues are all solved by switching to SSE2, is not quite true. | ||
The SSE instructions being used there are ucomiss and ucomisd. | The SSE instructions being used there are ucomiss and ucomisd. | ||