Passing parameters to an assembly function is described in the SPRU187 C6x Optimizing C Compiler: Chapter Runtime Environment: C System Stack, Register Conventions, Function Structure and Calling Conventions, Interfacing C with Assembly Language All that is required is to conform to C calling conventions, and save a part of the register file on the stack. The procedure is fairly simple and well described in the above sections. For example, parameters, or at least 10 of them are passed in registers A4, B4, A6, B6, A8, B8, A10, B10, A12, B12, the rest of parameters is passed on the stack. Result is returned in A4, or in A3 if a pointer is returned. A parameter that is longer than a word is passed in a pair of registers A5:A4, B5:B4, ..., B13:B12. Regards, Andrew On 20 Aug 2001 "Nikhil S. Parvatikar" <> wrote: > Hi ! > > I need a help. > I have worked earlier on C54x CCS Simulator > I am trying to Interface C & assembly ( basically trying to pass > parameters from C to Assembly ). > My problem is I am not able to pass parameters from C to Assembly for > C67xx Simulator Mode : > > I have also gone through the C67xx Optimizer C users guide from TI. > Is there any Compiler/Assembler options to be set.......... > > Kindly suggest a solution for the above problem . > I would be grateful to u if u can suggest some worked examples regd > passing parameters fron C to C6x Assembly. > > thanks, > nikhil > > This is what i am trying to do ......... > > Example C File > > main() > { > extern int nikhil(); > ............ > ......... > .... > nikhil(); > } > > Assembly File > > .def _nikhil: > _nikhil: Function in assembly. > > > [This message contained attachments] > > ________________________________________________________________________ > ________________________________________________________________________ > > ">http://docs.yahoo.com/info/terms/ |
Re: Interfacing C & Assembly
Started by ●August 20, 2001
Reply by ●August 21, 20012001-08-21
Hi !
I need a help.
I have worked earlier on C54x CCS
Simulator
I am trying to Interface C & assembly (
basically trying to pass parameters from C to Assembly ).
My problem is I am not able to pass parameters
from C to Assembly for C67xx Simulator Mode :
I have also gone through the C67xx Optimizer C users guide from
TI.
Is there any Compiler/Assembler options to be set..........
Kindly suggest a solution for the above problem
.
I would be grateful to u if u can suggest some
worked examples regd passing parameters fron C to C6x Assembly.
thanks,
nikhil
This is what i am trying to do .........
Example C File
main()
{
extern int nikhil();
............
.........
....
nikhil();
}
Assembly File
.def _nikhil:
_nikhil: Function in assembly.
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