Compiler/TMS320F28379S: TMU function call

Ralf Koester

Expert 1400 points

Part Number: TMS320F28379S
Other Parts Discussed in Thread: TMS320F28377S

Tool/software: TI C/C++ Compiler

Hi,

in an example of the control suite I've found a call which calculates a sinus with this function: __sinpuf32!

The example is tmu_sinegen_cpu01.c!

the code is:

tmuOutput[i] = __sinpuf32(inputVector[i]);

Where does the compiler find this call __sinpuf32(x)?

I did not find this in a header.

I replaced a sin(x) call with __sinpuf32(x) in my first TMS320F28377S project with CCSv6.1.3 and got an error message

because __sinpuf32 will not be found!

I read the docs and supposed that the compiler will replace a sin(x) call with the TMU function automaticly?

Is this correct?

over 8 years ago

0 Archaeologist over 8 years ago

TI__Guru* 84285 points

When using that intrinsic, you must use the compiler option --tmu_support

0 Ralf Koester over 8 years ago in reply to Archaeologist

Expert 1400 points

I hope I have this:

see below!

br Ralf

0 George Mock over 8 years ago in reply to Ralf Koester

TI__Guru**** 251230 points

It appears you tried to attach an image to your last post. Something went wrong. I don't see any image.

Thanks and regards,

-George

0 Ralf Koester over 8 years ago in reply to George Mock

Expert 1400 points

Sorry about this, I've made a mistake.

Now it should work!

I would try to show, that the options seem to be set correct.

But the compiling process doesn't know the __sinpuf32() call.

br Ralf

0 George Mock over 8 years ago in reply to Ralf Koester

TI__Guru**** 251230 points

Everything looks correct. I'm not sure how the results differ from what you expect.

What follows is a small example that illustrates how this intrinsic works.

>>>type file.c
double fxn(double arg)
{
   return __sinpuf32(arg);
}

>>>cl2000 --tmu_support=tmu0 --src_interlist file.c

The option --src_interlist tells the compiler to not delete the auto-generated .asm file, and to add comments to it that make it easier to understand. Inspect file.asm to see these lines ...

;----------------------------------------------------------------------
;   3 | return __sinpuf32(arg);
;----------------------------------------------------------------------
        SINPUF32  R0H,R0H               ; [CPU_] |3|

There is no call to a function named __sinpuf32. Instead, the instruction SINPUF32 is used.

To understand more about intrinsics like this work, please see the section titled Using Intrinsics to Access Assembly Language Statements in the C2000 compiler manual.

Thanks and regards,

-George

0 Ralf Koester over 8 years ago in reply to George Mock

Expert 1400 points

Hi George,

very vividly, I try my best an will dive in.

I will share my experience with your information.

br Ralf

Code Composer Studio™︎

Code Composer Studio forum

Compiler/TMS320F28379S: TMU function call