chundoong-lab-ta/SamsungDS22/submissions/HW5/yoojin73.kim/kernel.cl

56 lines
1.6 KiB
Common Lisp

#define TS 32
#define WPT 8
#define RTS (TS/WPT)
__kernel void sgemm(__global float *A, __global float *B, __global float *C, int M, int N, int K) {
const int row = get_local_id(0); // row index of C
const int col = get_local_id(1); // column index of C
const int global_row = TS * get_group_id(0) + row;
const int global_col = TS * get_group_id(1) + col;
__local float subA[TS][TS];
__local float subB[TS][TS];
float accum[WPT];
for (int w = 0; w < WPT; w++) {
accum[w] = 0.0f;
}
const int num_tiles = (K+TS-1)/TS;
for (int t = 0; t < num_tiles; t++) {
for (int w = 0; w < WPT; w++) {
const int tiledRow = TS*t + row;
const int tiledCol = TS*t + col;
/*if (M <= global_row) subA[row + w*RTS][col] = 0.0f;
else*/
if (K <= tiledCol) subA[row + w*RTS][col] = 0.0f;
else if (M <= (global_row + w*RTS)) subA[row + w*RTS][col] = 0.0f;
else
subA[row + w*RTS][col] = A[(global_row + w*RTS)*K + tiledCol];
if (N <= global_col) subB[row + w*RTS][col] = 0.0f;
//else if (K <= tiledRow) subB[row + w*RTS][col] = 0.0f;
else if (K <= (tiledRow + w*RTS)) subB[row + w*RTS][col] = 0.0f;
else
subB[row + w*RTS][col] = B[(tiledRow + w*RTS)*N + global_col];
}
barrier(CLK_LOCAL_MEM_FENCE);
for (int k = 0; k < TS; k++) {
for (int w = 0; w < WPT; w++) {
accum[w] += subA[row + w*RTS][k] * subB[k][col];
}
}
barrier(CLK_LOCAL_MEM_FENCE);
}
for (int w = 0; w < WPT; w++) {
if (M <= (global_row + w*RTS));// C[(global_row + w*RTS)*N + global_col] = 0.0f;
else if (N <= global_col);// C[(global_row + w*RTS)*N + global_col] = 0.0f;
else
C[(global_row + w*RTS)*N + global_col] = accum[w];
}
}