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Compiler/TMS320F28335: Inline assembly to put the current register value at the function symbol address

Han SeungJae
Intellectual 980 points

Part Number: TMS320F28335

Tool/software: TI C/C++ Compiler

Hello,

I'm currently writing an inline assembly that puts the values in a register on the stack.

In general, function symbols are converted to addresses, and it seems that assembly language is used like this:
__asm(" MOVL #0x3333, ACC");

Assuming that the name of the function symbol I want to use is "Function_name", I want to store the value of the register as a symbol as follows.
__asm(" MOVL_Function_name, ACC");

__asm(" MOVL ptr[_Function_name], ACC") in gcc; It seems to be used as.

I'm curious how to store values as symbols in TI.

Thanks, Regards

Han

  • 0
    Intellectual 980 points

    Sorry.

    It's a global variable, not a function.

    You can think of it as having declared Function_name as a global variable.

    In addition, I wonder if there is a difference between the assembly used, whether it is a function symbol or a global variable symbol.

    Thanks

  • 0 in reply to Han SeungJae
    TI__Guru**** 253390 points

    Unfortunately, the asm statement in the TI C28x compiler does not support what you have attempted to do.  GCC style asm statements are not supported.  For more detail, please search the C28x compiler manual for the sub-chapter titled The __asm Statement.

    Please consider these alternatives.  Compiler intrinsics provide a way to access unusual C28x instructions from C.  For more detail, please search the same compiler manual for the sub-chapter titled Using Intrinsics to Access Assembly Language Statements.  Or, you may need to perform the unusual operation in a hand-coded assembly function.  For more information about using such a function with C code, please search the same compiler manual for the sub-chapter titled Interfacing C and C++ With Assembly Language.

    Thanks and regards,

    -George