Last active
July 12, 2016 07:12
-
-
Save omaralvarez/32441d4791cf3198f837de147dcec432 to your computer and use it in GitHub Desktop.
Shared Memory Gather
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| __global__ void s2g_sm_gpu_gather_kernel(int *in, int *out, int len) { | |
| //@@ INSERT CODE HERE | |
| __shared__ int values[TILE_SIZE]; | |
| // Get our global thread ID | |
| int id = blockIdx.x*blockDim.x + threadIdx.x; | |
| int sum = 0; | |
| for (int k = 0; k < (len - 1)/TILE_SIZE + 1; ++k) { | |
| int start = k*TILE_SIZE; | |
| int lid = start + threadIdx.x; | |
| if(lid < len) | |
| values[threadIdx.x] = outInvariant(in[lid]); | |
| else | |
| values[threadIdx.x] = 0; | |
| __syncthreads(); | |
| for (int l = 0; l < TILE_SIZE; ++l) { | |
| if(start + l < len) | |
| sum += outDependent(values[l], start + l, id); | |
| } | |
| __syncthreads(); | |
| } | |
| if(id < len) | |
| out[id] = sum; | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment