Imported funcs from sm64 to code_80004740.c and trig_tables.inc.c (#68)

* fixed float issue brought over from zeldaret

* Import trig_tables.inc.c

* Delete game_data_802BA370.s

* Import two funcs from sm64 into code_80004740.c

src/math_util.h

@@ -0,0 +1,35 @@
+#ifndef MATH_UTIL_H
+#define MATH_UTIL_H
+
+#include <PR/ultratypes.h>
+
+#include "types.h"
+
+/*
+ * The sine and cosine tables overlap, but "#define gCosineTable (gSineTable +
+ * 0x400)" doesn't give expected codegen; gSineTable and gCosineTable need to
+ * be different symbols for code to match. Most likely the tables were placed
+ * adjacent to each other, and gSineTable cut short, such that reads overflow
+ * into gCosineTable.
+ *
+ * These kinds of out of bounds reads are undefined behavior, and break on
+ * e.g. GCC (which doesn't place the tables next to each other, and probably
+ * exploits array sizes for range analysis-based optimizations as well).
+ * Thus, for non-IDO compilers we use the standard-compliant version.
+ */
+extern f32 gSineTable[];
+#ifdef AVOID_UB
+#define gCosineTable (gSineTable + 0x400)
+#else
+extern f32 gCosineTable[];
+#endif
+
+//#define sins(x) gSineTable[(u16) (x) >> 4]
+//#define coss(x) gCosineTable[(u16) (x) >> 4]
+
+//#define min(a, b) ((a) <= (b) ? (a) : (b))
+//#define max(a, b) ((a) > (b) ? (a) : (b))
+
+#define sqr(x) ((x) * (x))
+
+#endif // MATH_UTIL_H