better

1 files changed, 20 insertions, 2 deletions

diff --git a/cachelab-handout/trans.c b/cachelab-handout/trans.c
index d8f221b..db6f9d3 100644
--- a/cachelab-handout/trans.c
+++ b/cachelab-handout/trans.c
@@ -22,8 +22,18 @@ int is_transpose(int M, int N, int A[N][M], int B[M][N]);
 char transpose_submit_desc[] = "Transpose submission";
 void transpose_submit(int M, int N, int A[N][M], int B[M][N])
 {
+
+    // FILE *fp = fopen("debug.log", "w");
+    // if (fp == NULL) {
+    //     perror("lol");
+    //     return;
+    // }
+    // fprintf(fp, "address of A and B: %p %p\n", A, B);
+    // fclose(fp);
+
+
     int i, j, tmp, i2, j2;
-    const int blockSize = 8;
+    const int blockSize = 4;
 
     // given N, M are multiples of blockSize
     // just to test
@@ -31,12 +41,20 @@ void transpose_submit(int M, int N, int A[N][M], int B[M][N])
     {
         for (j = 0; j < M/blockSize; j++)
         {
-            // now i, j are indecies of smaller groups
             for (i2 = 0; i2 < blockSize; i2++)
             {
                 for (j2 = 0; j2 < blockSize; j2++)
                 {
                     tmp = A[i*blockSize + i2][j*blockSize + j2];
+                    B[j*blockSize + i2][i*blockSize + j2] = tmp;
+                }
+            }
+            for (i2 = 0; i2 < blockSize; i2++)
+            {
+                for (j2 = i2+1; j2 < blockSize; j2++)
+                {
+                    tmp = B[j*blockSize + i2][i*blockSize + j2];
+                    B[j*blockSize + i2][i*blockSize + j2] = B[j*blockSize + j2][i*blockSize + i2];
                     B[j*blockSize + j2][i*blockSize + i2] = tmp;
                 }
             }