PPCG 0.07 has been released

09 February 2017

PPCG 0.07 was released containing one main change:

  • Support hybrid tiling

    Basic hybrid tiling can now be enabled using the --hybrid option. It currently only applies to stencils with a single statement.

    For example, hybrid tiling can be applied to the input (say heat-2d.c)

    #define N 3072
#define T 512
   
void heat(float A[2][N][N])
{
#pragma scop
    for (long t = 0; t < T; t++) {
      for (long i = 1; i < N - 1; i++)
        for (long j = 1; j < N - 1; j++)
            A[(t+1)%2][i][j] = (1/9.0f) *
                (A[t%2][i][j] +
                 A[t%2][i-1][j-1] + A[t%2][i-1][j] + A[t%2][i-1][j+1] +
                 A[t%2][i][j-1] + A[t%2][i][j+1] +
                 A[t%2][i+1][j-1] + A[t%2][i+1][j] + A[t%2][i+1][j+1]);
   
    }
#pragma endscop
}

    by invoking ppcg as follows

    ppcg --hybrid --sizes="{kernel[i]->tile[2,2,128];kernel[i]->block[1,128]}" \
 --isolate-full-tiles --unroll-copy-shared --unroll-gpu-tile heat-2d.c