some work on x11 ext

Common/test.h

@@ -4,6 +4,7 @@
 
 #include "bits.h"
 #include "fix.h"
+#include "mat.h"
 #include "std.h"
 #include <stdbool.h>
 
@@ -18,7 +19,7 @@
 static bool com_test_fix(void) {
   bool anyfail = false;
   {
-    double max_sqrt_deviation = 0.0f;
+    double max_sqrt_deviation = 0.0;
     com_fix_t sqrt_accumulator = 0;
     com_fix_t sqrt_test_step = COM_FIX_FRACUNIT >> 2; /* Quarter step */
     for (int i = 0; i < COM_FIX_FRACUNIT << 1; ++i) {
@@ -34,7 +35,7 @@ static bool com_test_fix(void) {
   }
 
   {
-    double max_sin_deviation = 0.0f;
+    double max_sin_deviation = 0.0;
     com_fix_t sin_accumulator = -COM_FIX_PI * 4;
     com_fix_t sin_test_step = (COM_FIX_PI << 1) >> 10;
     for (int i = 0; i < 1024 * 32; ++i) {
@@ -50,7 +51,7 @@ static bool com_test_fix(void) {
   }
 
   {
-    double max_cos_deviation = 0.0f;
+    double max_cos_deviation = 0.0;
     com_fix_t cos_accumulator = -COM_FIX_PI * 4;
     com_fix_t cos_test_step = (COM_FIX_PI << 1) >> 10;
     for (int i = 0; i < 1024 * 32; ++i) {
@@ -66,8 +67,8 @@ static bool com_test_fix(void) {
   }
 
   {
-    double max_sin_deviation = 0.0f;
-    double max_cos_deviation = 0.0f;
+    double max_sin_deviation = 0.0;
+    double max_cos_deviation = 0.0;
     com_fix_t sincos_accumulator = -COM_FIX_PI * 4;
     com_fix_t sincos_test_step = (COM_FIX_PI << 1) >> 10;
     for (int i = 0; i < 1024 * 32; ++i) {
@@ -105,6 +106,26 @@ static bool com_test_bits(void) {
   return anyfail;
 }
 
+static bool com_test_mat(void) {
+  bool anyfail = false;
+
+  com_mat_t const m0 = com_mat_identity();
+  com_mat_t m1 = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+  for (int i = 0; i < 16; ++i)
+    m1.a[i] *= COM_FIX_FRACUNIT;
+
+  com_mat_t const mul = com_mat_mul(m1, m0);
+  com_mat_t const mul_reordered = com_mat_mul_reodered(com_mat_reoder(m1), m0);
+
+  for (int i = 0; i < 16; ++i) {
+    TEST(mul.a[i] == mul_reordered.a[i]);
+    if (mul.a[i] != mul_reordered.a[i])
+      break;
+  }
+
+  return anyfail;
+}
+
 static bool com_test_run(void) {
   bool anyfail = false;
   if (com_test_fix()) {
@@ -115,6 +136,10 @@ static bool com_test_run(void) {
     com_std_print('c', "com_bits tests failed!");
     anyfail = true;
   }
+  if (com_test_mat()) {
+    com_std_print('c', "com_mat tests failed!");
+    anyfail = true;
+  }
   return !anyfail;
 }