how to define a local array in linear assembly program.

Vinod Krishna

Prodigy 60 points

Hello,

I am new to CCS linear assembly coding.

i started to write linear assembly code but got stuck.

this the standard example in linear assembly coding i got.

.def _dotp4clasmfunc

_dotp4clasmfunc: .cproc ap, bp, count

.reg a, b, prod, sum

zero sum

loop: ldh *ap++,a

ldh *bp++,b

mpy a,b,prod

add prod,sum,sum

sub count,1,count

[count] b loop

.return sum

.endproc

here .reg is used to declare local register to be used in the code.

so my question is what should i do to declare an local array in the code.

thanks,

Vinod

over 11 years ago

0 Archaeologist over 11 years ago

TI__Guru* 84225 points

How do you intend to use this local array?

0 George Mock over 11 years ago

TI__Guru**** 241495 points

Vinod Krishna said:
what should i do to declare an local array in the code.

There is no way to directly do it in linear assembly. You can declare an array in C, then pass it (well, actually, you pass the base address) to the linear assembly routine as a parameter.

Thanks and regards,

-George

0 Vinod Krishna over 11 years ago in reply to George Mock

Prodigy 60 points

Hello,

thanks Geroge for the reply. i tried your solution.

but also, i was thinking if i obtain stack address the use stack as my local array during the execution and later restore it at the end, will that work.

Regards,

Vinod

0 Vinod Krishna over 11 years ago in reply to Archaeologist

Prodigy 60 points

@Archaeologist

i was trying to implement a filter. so i required a local array just for storing the state values.

Regards,

Vinod

0 George Mock over 11 years ago in reply to Vinod Krishna

TI__Guru**** 241495 points

Vinod Krishna said:
i was thinking if i obtain stack address the use stack as my local array during the execution and later restore it at the end, will that work.

There is probably a way to make that work. But I've never seen it done. The linear assembly language has no built-in mechanisms related to local arrays. It is easier and more reliable to create the array in C and pass it in.

Thanks and regards,

-George

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how to define a local array in linear assembly program.