1 files changed, 48 insertions, 0 deletions
diff --git a/src/code/sys_math.c b/src/code/sys_math.c
new file mode 100644
index 000000000..25af276ec
--- /dev/null
+++ b/src/code/sys_math.c
@@ -0,0 +1,48 @@
+#include <global.h>
+#include <math.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 func_800CA540(f32 arg0) {
+    f32 ret = 1.0f;
+    s32 i;
+    for (i = arg0; i > 1; i--) {
+        ret *= i;
+    }
+    return ret;
+}
+
+#ifdef NON_MATCHING
+f32 func_800CA63C(u32 arg0) {
+    f32 ret;
+    s32 i;
+    if (arg0 > 12) {
+        ret = sFactorialTbl[12];
+        for (i = 13; i < (s32)arg0; i++) {
+            ret *= i;
+        }
+    } else {
+        ret = sFactorialTbl[arg0];
+    }
+    return ret;
+}
+#else
+#pragma GLOBAL_ASM("asm/non_matchings/code/sys_math/func_800CA63C.s")
+#endif
+
+f32 func_800CA6FC(f32 arg0, s32 arg1) {
+    f32 ret = 1.0f;
+    while (arg1 > 0) {
+        arg1--;
+        ret *= arg0;
+    }
+    return ret;
+}
+
+f32 func_800CA720(f32 arg0) {
+    return sins((s16)(arg0 * (32767.0f / M_PI))) * SHT_MINV;
+}
+
+f32 func_800CA774(f32 arg0) {
+    return coss((s16)(arg0 * (32767.0f / M_PI))) * SHT_MINV;
+}