Fix loadSmemB iteration.

Author: KuangjuX

examples/matmul/this-sm80/matmul-v00.cu

@@ -43,7 +43,7 @@ __device__ void loadSmemB(half *smem, half *B, int N, int K, int ko)
     int ty = threadIdx.y;
     int tz = threadIdx.z;
     int tid = tz * 64 + ty * 32 + tx;
-    for (int i = 0; i < 64; ++i)
+    for (int i = 0; i < 32; ++i)
     {
         int row = i * 4 + tid / 32;
         int col = tid % 32;
@@ -175,4 +175,4 @@ __global__ void matmul(half *A, half *B, half *C, int M, int N, int K, float alp
     storeAccum(SC, Accum);
     __syncthreads();
     storeSmemC(C, SC, M, N);
-}
+}