Update spmv.c: solve segmentation fault when m and n are larger than 50000

jayfely@qq.com · jayfely@qq.com · commit 2f4c5bb3a98e · 2020-03-11T10:30:09.000+08:00
diff --git a/benchmark/spmv.c b/benchmark/spmv.c
@@ -178,7 +178,7 @@ int main(int argc, char *argv[]){
 
    for(j = 0; j < m; j++){
       		for(i = 0; i < m * COMPSIZE; i++){
-			a[i + j * m * COMPSIZE] = ((FLOAT) rand() / (FLOAT) RAND_MAX) - 0.5;
+			a[(long)i + (long)j * (long)m * COMPSIZE] = ((FLOAT) rand() / (FLOAT) RAND_MAX) - 0.5;
       		}
    }
 

Original file line number	Diff line number	Diff line change
`@@ -178,7 +178,7 @@ int main(int argc, char *argv[]){`
`178`	`178`
`179`	`179`	`for(j = 0; j < m; j++){`
`180`	`180`	`for(i = 0; i < m * COMPSIZE; i++){`
`181`		`- a[i + j * m * COMPSIZE] = ((FLOAT) rand() / (FLOAT) RAND_MAX) - 0.5;`
	`181`	`+ a[(long)i + (long)j * (long)m * COMPSIZE] = ((FLOAT) rand() / (FLOAT) RAND_MAX) - 0.5;`
`182`	`182`	`}`
`183`	`183`	`}`
`184`	`184`