Re: Caaling assembly routine in c

Ravi Uday <raviuday@xxxxxxxxx> writes:
> Sachin wrote:
[...]
>> I am calling this routine in c function like that:
>>
>> extern void asm(void);
>>
>> void foo()
>> {
>> asm();
>> }
>>
>> On compiling, error message comes that
>> symbol asm unresolved.
>>
>> Could any one tell that how I can do it for GHS.
>
> There is not much said about assemby routines from C its more
> implementation specific stuff.
> However this is what the C89 standard has to say -
>
> A.6.5.10 The asm keyword
>
> The asm keyword may be used to insert assembly-language code
> directly into the translator output. The most common implementation
> is via a statement of the form
>
> asm ( character-string-literal );
>
> So make sure you pass a character-string-literal as a param, not a void !

I think you've missed the point.

The use of "asm" as a keyword is mentioned as a common language
extension; it's non-standard. It's generally a way to insert assembly
language instructions inline into C code, as if they were statements.
For example:

...
printf("About to do some register manipulation\n");
asm("mov R0, R1");
printf("Done\n");
...

The OP's implementation obviously does not implement an "asm" keyword,
since he's using "asm" as a function name.

--
Keith Thompson (The_Other_Keith) kst-u@xxxxxxx <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.
.

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