Re: [microblaze-uclinux] Jtag Debug

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi John, Andy,

John McGrath wrote:
> Hi,
> I Don't know if this has been pointed out already, but have you enabled the cache's in your code?
> 
> I do not have experience with doing DSP in a microblaze, but does anyone else have benchmark figures for such operations? I know that it can be tremendously accelerate using the FSL interface and some dedicated hardware, 
> but for a SW only implementation, someone may have figures faster than one per second!

We've done real-time, SW-only Dolby 5.1 decode in MicroBlaze, running
under uClinux.  The FPU is enabled, of course, and the code is carefully
audited to enforce single-precision arithmetic.

As someone has already pointed out, all floating point constants must be
specified with a trailing "F" character (e.g. 2.0F) else the compiler
will default to double precision and performance falls through the floor.

Cheers,

John
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