Compiler/TMS320F28377S: Variable Names in CLA

Daniel Bernal Galeano

Part Number: TMS320F28377S
Other Parts Discussed in Thread: C2000WARE

Tool/software: TI C/C++ Compiler

Hello,

Since I'm not very confident in assembly language, I was wondering if someone could please explain why the compiler doesn't admit some variable names, like B1 or B3. Using B3 as a variable name I get the next error:

>> Compilation failure
subdir_rules.mk:16: recipe for target 'asin.obj' failed
"C:\temp\{38725395-1574-42EF-B38A-81C174C6EC44}", ERROR! at line 106: [E0003] Illegal register addressing operand
MMOV32 MR0,@B3 ; [CPU_FPU] |100|

"C:\temp\{38725395-1574-42EF-B38A-81C174C6EC44}", ERROR! at line 106: [E0004] Illegal operand combination
MMOV32 MR0,@B3 ; [CPU_FPU] |100|

"C:\temp\{38725395-1574-42EF-B38A-81C174C6EC44}", ERROR! at line 108: [E0003] Illegal register addressing operand
MMOV32 @B3,MR0 ; [CPU_FPU] |100|

"C:\temp\{38725395-1574-42EF-B38A-81C174C6EC44}", ERROR! at line 108: [E0004] Illegal operand combination
MMOV32 @B3,MR0 ; [CPU_FPU] |100|

Thanks for the help

over 5 years ago

0 Lori Heustess over 5 years ago

TI__Guru* 93450 points

The answer depends on the application binary interface (ABI) your project is using. COFF ABI is the older one, and EABI is the newer one.

COFF ABI requires an underscore before symbol names in assembly. i.e. _myVar
EABI does not use the _ on the symbol names so your example should be fine.

We are recommending EABI for the device you are using and the collateral for this device in C2000Ware supports EABI.

I also suggest you consider writing your CLA code in C instead of assembly.

For more background, please search the C28x compiler manual for the sub-chapter titled About the Application Binary Interface.

Regards

Lori

0 Daniel Bernal Galeano over 5 years ago in reply to Lori Heustess

Prodigy 190 points

Hello Lori,

Thanks for the explanation, however, in fact, I'm using C in my CLA application, my code looks like this:

interrupt void Cla1Task3 ( void )
{
B3=AdcbResultRegs.ADCRESULT1;
}

and the configuration of the project like this:

Using B_3 solves the problem but still don't understand the error since I'm using eabi in theory.

0 Lori Heustess over 5 years ago in reply to Daniel Bernal Galeano

TI__Guru* 93450 points

Thank you for the details. Are there any other warnings or errors issued by the tools? I will ask the compiler team to comment on this thread.

0 Daniel Bernal Galeano over 5 years ago in reply to Lori Heustess

Prodigy 190 points

I haven't seen any other so far

Thank you

0 George Mock over 5 years ago

TI__Guru**** 252560 points

I am unable to reproduce this behavior ...

Daniel Bernal Galeano said:
"C:\temp\{38725395-1574-42EF-B38A-81C174C6EC44}", ERROR! at line 106: [E0003] Illegal register addressing operand
MMOV32 MR0,@B3 ; [CPU_FPU] |100|

For the source file that sees this error, please follow the directions in the article How to Submit a Compiler Test Case.

Thanks and regards,

-George

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Compiler/TMS320F28377S: Variable Names in CLA