EVE/VCOP/KernelC : one byte load store is possible or not?

Hello,

I am writing program in kernel-C. Trying to load & store 1byte data value.

Eg: If input :  17  18  19  20  21 ......  31  32

                       33  34  35  36  37 ...... 47  48

    output : 0 0 0 0 0 ........ 0 0

                  0 0 0 0 0 ........ 0 0

desire output : 18  0  0  0  0  ......  0  31

                           34  0  0  0  0  ...... 0  47

I tried using onept() for load & store. But output results :

17  18  19   0   0   0   0   0   0   0   0   0   0   0   0  30
31  32   0   0   0   0   0   0   0   0   0   0   0   0   0   0

so, want to know which operation can i use to produce the desired output.


Regards

Surbhi

One issue I see is that AddrIn and AddrOut should be set to:

__agen AddrIn = col*img_width*ELEMSZ_IN;

__agen AddrOut = col*img_width*ELEMSZ_OUT;

Also you should use ELMSZ_IN or ELMSZ_OUT when adding offsets to addresses input and output:

Vin1= (input+(img_width+1)*ELMSZ_IN)[AddrIn].onept();
Vin2= (input+(img_width+(img_width-2))*ELMSZ_IN)[AddrIn].onept();

(output+img_width*ELMSZ_OUT)[AddrOut].onept() = Vin1;
(output+(img_width+(img_width-1))*ELMSZ_OUT)[AddrOut].onept() = Vin2;

I am not sure if adding img_width is the right thing to do, because according to the output pattern you described, it should be:

Vin1= (input+ELMSZ_IN)[AddrIn].onept();
Vin2= (input+(img_width-2)*ELMSZ_IN)[AddrIn].onept();

(output)[AddrOut].onept() = Vin1;
(output+(img_width-1)*ELMSZ_OUT)[AddrOut].onept() = Vin2;

Hi Surbhi,

Please make sure, you have included these lines at the beginning of the *.k file:

#define ELEMSZ_IN sizeof(*input) 
#define ELEMSZ_OUT sizeof(*output)

regards,

Victor