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boundary check in indexing #89

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boundary check in indexing #89

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16 changes: 12 additions & 4 deletions csrc/vertical_slash_index.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -60,12 +60,20 @@ __global__ void convert_vertical_slash_indexes_kernel(

int tmp_col_cnt = 0, tmp_blk_cnt = 0;
int s = 0, v = 0;
int v_idx = vertical_indexes[v++];
int s_idx = slash_indexes[s++];
while (s_idx >= end_m) {

// in case of vs are empty
int v_idx = (v < NNZ_V) ? vertical_indexes[v++] : (end_m + BLOCK_SIZE_M);
int s_idx = (s < NNZ_S) ? slash_indexes[s++] : -1;

// make sure s_idx is valid
while (s_idx >= end_m && s < NNZ_S) {
s_idx = slash_indexes[s++];
}
s_idx = max(end_m - s_idx, BLOCK_SIZE_M);
if (s_idx >= end_m) {
s_idx = end_m + BLOCK_SIZE_M;
} else {
s_idx = max(end_m - s_idx, BLOCK_SIZE_M);
}
int range_start = s_idx - BLOCK_SIZE_M, range_end = s_idx;
while (1) {
if (v_idx < range_end) {
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