Gael Guennebaud 8dca9f97e3 Add numext::sqrt function to enable custom optimized implementation.
This changeset add two specializations for float/double on SSE. Those
are mostly usefull with GCC for which std::sqrt add an extra and costly
check on the result of _mm_sqrt_*. Clang does not add this burden.

In this changeset, only DenseBase::norm() makes use of it.
2016-01-21 20:18:51 +01:00
..
2010-07-23 19:00:02 +02:00
2015-10-30 12:02:52 +01:00