diff --git a/desmume/src/types.h b/desmume/src/types.h
index fb2892207..bb431113c 100644
--- a/desmume/src/types.h
+++ b/desmume/src/types.h
@@ -74,6 +74,34 @@ typedef u8  uint8;
 typedef u16 uint16;
 typedef u32 uint32;
 
+/*---------- GPU3D fixed-points types -----------*/
+
+typedef s32 f32;
+#define inttof32(n)          ((n) << 12)
+#define f32toint(n)          ((n) >> 12)
+#define floattof32(n)        ((int32)((n) * (1 << 12)))
+#define f32tofloat(n)        (((float)(n)) / (float)(1<<12))
+
+typedef s16 t16;
+#define f32tot16(n)          ((t16)(n >> 8))
+#define inttot16(n)          ((n) << 4)
+#define t16toint(n)          ((n) >> 4)
+#define floattot16(n)        ((t16)((n) * (1 << 4)))
+
+typedef s16 v16;
+#define inttov16(n)          ((n) << 12)
+#define f32tov16(n)          (n)
+#define v16toint(n)          ((n) >> 12)
+#define floattov16(n)         ((v16)((n) * (1 << 12)))
+
+typedef s16 v10;
+#define inttov10(n)          ((n) << 9)
+#define f32tov10(n)          ((v10)(n >> 3))
+#define v10toint(n)          ((n) >> 9)
+#define floattov10(n)        ((v10)((n) * (1 << 9)))
+
+/*----------------------*/
+
 typedef int BOOL;
 
 #ifndef TRUE