Update bench

bench/matrix.c

@@ -0,0 +1,58 @@
+int matrix_a[30][30];
+int matrix_b[30][30];
+int matrix_c[30][30];
+
+void matrix_init(int n, int nonce, int *x, int (*matrix)[30]) {
+  for (int i = 0; i < n; ++i) {
+    for (int j = 0; j < n; ++j) {
+      matrix[i][j] = ++*x;
+
+      if (*x % (nonce + 1)) {
+        ++*x;
+      }
+    }
+  }
+}
+
+int matrix_mul(int n, int nonce) {
+  if (!(n <= 30)) {
+    return nonce;
+  }
+
+  int x = 0;
+  matrix_init(n, nonce, &x, matrix_a);
+  matrix_init(n, nonce, &x, matrix_b);
+
+  int result = 0;
+  for (int i = 0; i < n; ++i) {
+    for (int j = 0; j < n; ++j) {
+      matrix_c[i][j] = 0;
+      for (int k = 0; k < n; ++k) {
+        matrix_c[i][j] += matrix_a[i][k] * matrix_b[k][j];
+      }
+      result += matrix_c[i][j];
+    }
+  }
+
+  return result;
+}
+
+int matrix_add(int n, int nonce) {
+  if (!(n <= 30)) {
+    return nonce;
+  }
+
+  int x = 0;
+  matrix_init(n, nonce, &x, matrix_a);
+  matrix_init(n, nonce, &x, matrix_b);
+
+  int result = 0;
+  for (int i = 0; i < n; ++i) {
+    for (int j = 0; j < n; ++j) {
+      matrix_c[i][j] = matrix_a[i][j] + nonce * matrix_b[i][j];
+      result += matrix_c[i][j];
+    }
+  }
+
+  return result;
+}