Gael Guennebaud 17860e578c add SSE2 versions of sin, cos, log, exp using code from Julien ...

Pommier. They are for float only, and they return exactly the same
result as the standard versions in about 90% of the cases. Otherwise the max error
is below 1e-7. However, for very large values (>1e3) the accuracy of sin and cos
slighlty decrease. They are about 3 or 4 times faster than 4 calls to their respective
standard versions. So, is it ok to enable them by default in their respective functors ?

2009-03-25 12:26:13 +00:00

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