fir -- FIR signal processing object benchmark
 Sweep block size == problem size
   -1 -- No state save, float
   -2 -- No state save, complex<float>
  -11 -- State save,    float
  -12 -- State save,    complex<float>

Parameters for cases 1, 2, 11, 12
  -p:k <size>  Kernel size (default 16)
  -p:d <size>  Decimation (default 1)

 Sweep block size, fixed problem size
  -21 -- No state save, float
  -22 -- No state save, complex<float>
  -31 -- State save,    float
  -32 -- State save,    complex<float>

Parameters for cases 22, 32
  -p:k <size>  Kernel size (default 16)
  -p:size <size> Problem size (default 1)