diff --git a/hw/dpi/float_dpi.cpp b/hw/dpi/float_dpi.cpp
index 6a810555..570d6bf2 100644
--- a/hw/dpi/float_dpi.cpp
+++ b/hw/dpi/float_dpi.cpp
@@ -358,6 +358,15 @@ float c_D_tile[M][M];
 // code assumes that svBitVecVal is basically a uint32_t
 static_assert(sizeof(svBitVecVal) == 4);
 
+void clear_float_array(float* c_tile, int rows, int cols) {
+  for (int i = 0; i < rows; i += 1) {
+    for (int j = 0; j < cols; j += 1) {
+      int index = i * cols + j;
+      c_tile[index] = 0.0f;
+    }
+  }
+}
+
 void fill_float_array(const svBitVecVal* sv_tile, float* c_tile, int rows, int cols) {
   
   for (int i = 0; i < rows; i += 1) {
@@ -396,6 +405,11 @@ void dpi_hmma(bool enable, const svBitVecVal* A_tile, const svBitVecVal* B_tile,
   if (!enable) {
     return;
   }
+  clear_float_array(&c_A_tile[0][0], M, K);
+  clear_float_array(&c_B_tile[0][0], K, M);
+  clear_float_array(&c_C_tile[0][0], M, M);
+  clear_float_array(&c_D_tile[0][0], M, M);
+
   // std::cout << "A: " << std::endl;
   fill_float_array(A_tile, &c_A_tile[0][0], M, K);
   // std::cout << "B: " << std::endl;