Hi,

Does anybody know how to compile reduction kernels to use in ATI CAL environment?

thx

How to use reduction kernels in ATI CAL

Hi,

Does anybody know how to compile reduction kernels to use in ATI CAL environment?

thx

Hello.

I've decided to ask here for not to create new topic.

I have a kernel:

reduce void krnl(int input<>, reduce int n<>

{

n += 1;

}Let's say

**input**is 1D stream of 160 elements (the number of stream processors on my 4850). What value should I get in first element of**n**? I was expecting 160, but I'm getting very strange results, 14 in this case. If I change kernel to n += 2 I get 23...Please excuse my stupid question, I've only started learning Stream, and obviously I don't understand something about reduction kernels, but what's wrong in my example?

Thanks.

I documented that in reduction kernel we only can do these

reduce void reduceGPU(float input<>, reduce float output<>)

{

//comparison

//if(output < input)

//if(output > input)

//if(output <= input)

//if(output >= input)

//if(output == input)

//if(output < a value for example 1.0f)

//if(output > a value)

//if(output <= a value)

//if(output >= a value)

//if(output == a value)

if(output < input)

output += input;

//output -= input;

//output *= input;

//output /= input;

}

Hi all again

Can somebody suggest me a sample of reduction kernel usage in ATI CAL?

thx