[petsc-dev] Double BLAS in PETSc complex

[Jed Brown]

Satish Balay <balay at mcs.anl.gov> writes:

> On Wed, 28 Aug 2013, Matthew Knepley wrote:
>
>> The last error I have is needing the double version of BLAS when we are
>> using complex. How do we handle that?
>
> Hm - I'm not sure.. Perhaps we need to add in a new prefix for
> Blas(PetscReal) [and corresponding macros?] to petscblaslapack.h?
> The #ifdef login in there will get more complex...

What if we _always_ defined real and complex prototypes, so the only
#ifdef logic would be in precision.  Then we define the scalar versions
something like this:

#define BLAS_Scalar_GEMM  SCALAR_SWITCH(BLAS_Real_GEMM,BLAS_Complex_GEMM)
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