| use macros so that all complex arithmetic can use native complex types if compiler supports them | |
| make sure double/float are replaced by BASE everywhere | |
| well... not _everywhere_; internal accumulations should | |
| be done in double always; there's no reason not too, | |
| it's safer and maybe even faster [GJ] | |
| gbmv_c : use conj*imag instead of having branches form Trans & ConjTrans |