decompile FX.s, FX_atan.s and partially decompile FX_ves.s

1 files changed, 41 insertions, 0 deletions

diff --git a/include/fx.h b/include/fx.h
new file mode 100644
index 00000000..82938219
--- /dev/null
+++ b/include/fx.h
@@ -0,0 +1,41 @@
+#ifndef GUARD_FX_H
+#define GUARD_FX_H
+
+#define FX32_INT_MASK     0xFFFFF000
+#define FX32_INT_ABS_MASK 0x7FFFF000
+#define FX32_FRAC_MASK    0x00000FFF
+
+#define FX32_INT_SHIFT    0xC
+#define FX64_INT_SHIFT    0xC
+
+#define FX32_INT(x)       (((x) & FX32_INT_MASK) >> FX32_INT_SHIFT)
+#define FX32_INT_ABS(x)   (((x) & FX32_INT_ABS_MASK) >> FX32_INT_SHIFT)
+#define FX32_FRAC(x)      ((x) & FX32_FRAC_MASK)
+
+struct Vecx32
+{
+    s32 x;
+    s32 y;
+    s32 z;
+};
+
+struct Vecx16
+{
+    s16 x;
+    s16 y;
+    s16 z;
+};
+
+void FX_Init();
+s32 FX_Modf(s32 x, s32 *iptr);
+s32 FX_Inv(s32 x);
+u16 FX_Atan(s32 x);
+u16 FX_Atan2(s32 x, s32 y);
+
+//Vec
+void VEC_Add(struct Vecx32 *x, struct Vecx32 *y, struct Vecx32 *dst);
+void VEC_Subtract(struct Vecx32 *x, struct Vecx32 *y, struct Vecx32 *dst);
+void VEC_Fx16Add(struct Vecx16 *x, struct Vecx16 *y, struct Vecx16 *dst);
+s32 VEC_DotProduct(struct Vecx32 *x, struct Vecx32 *y);
+
+#endif //GUARD_FX_H