Re: [Sdcc-user] SDCC don't compile assembly MACROS

[Borut R. <bor...@si...>]

Alan Carvalho de Assis wrote:
> Hi David
>
> 2007/11/6, David Lucena <yak...@ya...>:
>   
>> --- Alan Carvalho de Assis <ac...@gm...> escribió:
>>
>>     
>>> Hi,
>>> I verify that SDCC can't compile macros if it have more than one
>>> assembly line wrapped by _asm/_endasm.
>>>
>>> In example:
>>>
>>> #define SAVE_TASK_CTX(stack_low, stack_high)                           \
>>>
>>> {                                                                      \
>>>
>>>     /* Disable global interrupt. */                                    \
>>>
>>>       _asm                                                               \
>>>
>>>         bcf     INTCON, 6, 0                                           \
>>>
>>>         movff   STATUS, PREINC1                                        \
>>>
>>>         movff   WREG, PREINC1                                          \
>>>
>>>       _endasm                                                            \
>>>
>>>     /* Store the necessary registers to the stack. */                  \
>>>         ...
>>> }
>>>       
>> Have you noticed that the _endasm avobe has not ';'. Can you verify that is that way in your code?
>>
>>     
>
> Before wrap each line I just placed the ';' but the generated code
> (.asm) was wrong:
>
> 	bcf INTCON, 6, 0 movff STATUS, PREINC1 movff WREG, PREINC1
> 	movff BSR, PREINC1 movff FSR2L, PREINC1 movff FSR2H, PREINC1 movff
> FSR0L, PREINC1 movff FSR0H, PREINC1 movff TBLPTRU, PREINC1 movff
> TBLPTRH, PREINC1 movff TBLPTRL, PREINC1 movff TABLAT, PREINC1 movff
> PRODH, PREINC1 movff PRODL, PREINC1
> 	movlw 0x20 +1 clrf FSR0L, 0 clrf FSR0H, 0
>
> As you can see the compile placed all instruction wrapped by
> _asm/_endasm into a single line.
>
>   
The C preprocessor coverts all the '\' delimited lines into a single 
line (this is the correct behavior) and pass it to the C compiler. The C 
compiler just pass everything between __asm and __endasm; directly to 
the assembler. So if the assembler doesn't know how to assemble multiple 
instructions in a single line, you have a problem. An it seems that 
gpasm is such an assembler...

I think that your workaround to put each asm line in a sparate 
__asm/__endasm; block is correct.

Borut