chundoong-lab-ta/SamsungDS22/submissions/HW5/ig1004.lee/kernel.cl

52 lines
1.6 KiB
Common Lisp

#define TS 32
#define WPT 8
#define WIDTH 4
__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);
const int col = get_local_id(1);
const int global_row = TS * get_group_id(0) + row;
const int global_col = TS * get_group_id(1) + col;
const int RTS = TS/WPT;
__local float Asub[TS][TS];
__local float Bsub[TS][TS];
float intermediate_val[WPT];
for(int w = 0; w<WPT; w++) {
intermediate_val[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 t_row = TS * t +row;
const int t_col = TS * t +col;
if (((global_row + w*RTS) < M) && (t_col < K))
Asub[row + w*RTS][col] = A[(global_row + w*RTS) * K + t_col];
else
Asub[row + w*RTS][col] = 0;
if (((t_row + w*RTS) < K) && (global_col < N))
Bsub[row + w*RTS][col] = B[(t_row + w*RTS)* N + global_col];
else
Bsub[row + w*RTS][col] = 0;
}
barrier(CLK_LOCAL_MEM_FENCE);
for(int k = 0; k < TS; k++) {
for(int w=0; w<WPT; w++) {
if (Asub[row + w*RTS][k] == 0 || Bsub[k][col] == 0)
continue;
intermediate_val[w] += Asub[row + w*RTS][k] * Bsub[k][col];
}
}
barrier(CLK_LOCAL_MEM_FENCE);
}
for(int w = 0; w<WPT; w++) {
if ((global_row + w*RTS < M) && (global_col< N))
C[(global_row + w*RTS) *N + global_col] = intermediate_val[w];
}
}