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How can I use Blas to multiply a real matrix with a complex vector ? When I use functions like ccsrgemv() I get type mismatch errors?
error: argument of type "float *" is incompatible with parameter of type "std::complex<float> *"
Use two matrix-vector multiplications (A * (x + iy) = A * x + i A * y). More precisely, consider your complex vector as two entangled real vectors with stride 2. BLAS lets you do this.
UPDATE: actually, I did not notice that you were doing Sparse BLAS. For
dgemvmy trick works, but forcsrgemvit doesn’t. I’m afraid you have to maintain real and imaginary part separately.