1 files changed, 27 insertions, 0 deletions
diff --git a/arm9/source/bang.h b/arm9/source/bang.h
new file mode 100644
index 0000000..1e13f9f
--- /dev/null
+++ b/arm9/source/bang.h
@@ -0,0 +1,27 @@
+#ifndef BANG_H_
+    #define BANG_H_
+
+    #define SET_HIGH(v,high)  v = high << 8 | (v & 0x00ff)
+    #define SET_LOW(v,low)    v = (v & 0xff00) | low
+    #define HIGH(v)           (u8)((v) >> 8)
+    #define LOW(v)            (u8)((v)     )
+
+    #define H_HIGH(v)         (u8)((v) >> 24)
+    #define H_LOW(v)          (u8)((v) >> 16)
+    #define L_HIGH(v)         (u8)((v) >>  8)
+    #define L_LOW(v)          (u8)((v)      )
+
+    #define LEFT(x)       ((x) >> 4)
+    #define RIGHT(x)      ((x) & 0xf)
+
+    #define SHF(x,y)      (x >> RIGHT(y) << LEFT(y))
+    #define TAL(x)        __builtin_popcount(x)
+
+    #define TEST(x,m)     ((x & m) == m)
+    #define BOOL(v)       ((u8)-(v))
+    #define DOUBLE(h,l)   ((u16)(h) << 8 | (u16)(l))
+
+    u8 rev(u8 x);
+    u8 shc(u8 x, u8 y);
+    u16 shcd(u16 x, u8 y);
+#endif