Re: Assembly macro with parameters

[Fabrizio Fazzino <fabrizio@fazzino.it>]

Maciej W. Rozycki wrote:
> Fabrizio Fazzino wrote:
> 
>>By the way, is there any quick way of writing a setreg(reg_num,reg_val)
>>C macro to set the value of a register?

Hi guys,
just to let you know that I solved my problem this way:

    // Set a register to the desired value
    #define setreg(regnum,value) asm("move $" #regnum ", %0" : : "r"(value) : "$" #regnum)

    // Move the content of a register to the desired variable
    #define reg2var(regnum,var) asm("sw $" #regnum ", %0" : "=m"(*var) : : "memory")

>  BTW, how about adding support for opcodes you are interested in to 
> binutils instead?  It would make interfacing them to GCC much easier.

The CPU I'm working on will never "exist"... I'm just simulating it
as VHDL code, so I just needed a quick-and-dirty way of generating
inside my very short test programs the new opcodes added as an extension.

Thanks to all for your precious support!

Cheers and regards,

         Fabrizio


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    Fabrizio Fazzino - fabrizio@fazzino.it
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