Does the c compiler for the CLA use the MMACF32 instruction?

kedar nath

Does the c compiler for the CLA use the MMACF32 instruction? I have tried the fir32 "c" example for F28069 device and it doesnt seem to use the basic MAC instruction. Where am the problem?

over 10 years ago

0 Anna Youssefi over 10 years ago

TI__Intellectual 2560 points

There is no MMACF32 standalone instruction on the CLA, only a parallel MMACF32 || MMOV32. The compiler does not currently generate this instruction, but we do have assembly-level support for it for hand-coded assembly. We can investigate the feasibility and priority of adding code generation support for it.

0 kedar nath over 10 years ago in reply to Anna Youssefi

Prodigy 40 points

Are you sure : the basic dsp instruction: MAC (in this case MMACF32 || MMOV32) is not being used by the compiler under all settings of the compiler for the CLA?

0 Lori Heustess over 10 years ago in reply to kedar nath

TI__Guru* 91135 points

Anna is the C28x and CLA compiler engineering expert. She has direct insight into what instructions are generated.

0 Anna Youssefi over 10 years ago in reply to kedar nath

TI__Intellectual 2560 points

Yes, I am sure. There are several complexities to generating this instruction automatically and this wasn't implemented in the initial CLA compiler. (Although it is supported in assembly.) We will look at the feasibility of adding code generation support in a future release.

Thanks,

Anna

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Does the c compiler for the CLA use the MMACF32 instruction?