git subrepo clone https://github.com/HarbourMasters/soh.git

subrepo:
  subdir:   "soh"
  merged:   "ba904bbd0"
upstream:
  origin:   "https://github.com/HarbourMasters/soh.git"
  branch:   "master"
  commit:   "ba904bbd0"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

soh/src/code/sys_math.c

@@ -0,0 +1,47 @@
+#include "global.h"
+
+f32 sFactorialTbl[] = { 1.0f,    1.0f,     2.0f,      6.0f,       24.0f,       120.0f,      720.0f,
+                        5040.0f, 40320.0f, 362880.0f, 3628800.0f, 39916800.0f, 479001600.0f };
+
+f32 Math_FactorialF(f32 n) {
+    f32 ret = 1.0f;
+    s32 i;
+
+    for (i = n; i > 1; i--) {
+        ret *= i;
+    }
+    return ret;
+}
+
+f32 Math_Factorial(s32 n) {
+    f32 ret;
+    s32 i;
+
+    if ((u32)n > 12U) {
+        ret = sFactorialTbl[12];
+        for (i = 13; i <= n; i++) {
+            ret *= i;
+        }
+    } else {
+        ret = sFactorialTbl[n];
+    }
+    return ret;
+}
+
+f32 Math_PowF(f32 base, s32 exp) {
+    f32 ret = 1.0f;
+
+    while (exp > 0) {
+        exp--;
+        ret *= base;
+    }
+    return ret;
+}
+
+f32 Math_SinF(f32 angle) {
+    return sins((s16)(angle * (32767.0f / M_PI))) * SHT_MINV;
+}
+
+f32 Math_CosF(f32 angle) {
+    return coss((s16)(angle * (32767.0f / M_PI))) * SHT_MINV;
+}