fixed to fix and some more

Common/mat.c

@@ -0,0 +1,19 @@
+#include "mat.h"
+#include "Timer/timer.h"
+
+/* TODO: Doesn't work, clang optimizes it away. We need RNG here. */
+
+void com_mat_run_bench(void) {
+  uint64_t start = com_timer_count_ns();
+  for (int i = 5000000; i--;) {
+    com_mat_t a = com_mat_identity();
+    com_mat_t b = com_mat_identity();
+    a.a[3] = i * COM_FIX_FRACUNIT;
+    b.a[9] = i * COM_FIX_FRACUNIT;
+    COM_MAT_PROFILE_SINK(a);
+    COM_MAT_PROFILE_SINK(b);
+    com_mat_t mul = com_mat_mul(a, b);
+    COM_MAT_PROFILE_SINK(mul);
+  }
+  com_timer_profile(start, "mat: mul");
+}