z_lib fully matched (#85)

* z_lib OK

* Documentation

* Added stdbool and stdint

* Fixup for new names

* Fixup bad merge

* Feedback

* Use u/s32 for intptr_t

include/math.h

@@ -0,0 +1,29 @@
+#ifndef _MATH_H_
+#define _MATH_H_
+
+#include <PR/ultratypes.h>
+
+#define M_PI 3.14159265358979323846f
+#define M_SQRT2 1.41421356237309504880f
+#define FLT_MAX 340282346638528859811704183484516925440.0f
+#define SHT_MAX 32767.0f
+#define SHT_MINV (1.0f / SHT_MAX)
+#define DEGTORAD(x) (x * M_PI / 180.0f)
+
+typedef union {
+    struct {
+        u32 hi;
+        u32 lo;
+    } word;
+
+    f64 d;
+} du;
+
+typedef union {
+    u32 i;
+    f32 f;
+} fu;
+
+extern f32 __libm_qnan_f;
+
+#endif