1 files changed, 61 insertions, 0 deletions
diff --git a/include/macros.inc b/include/macros.inc
index 2b5b6b8..86c3fb3 100644
--- a/include/macros.inc
+++ b/include/macros.inc
@@ -21,3 +21,64 @@ farjp: macro
     pop af
     jp _farjp
 endm
+
+
+lb: macro
+    ld \1, ((\2) & $ff) << 8 | ((\3) & $ff)
+endm
+
+ln: macro
+    ld \1, ((\2) & $f) << 4 | ((\3) & $f)
+endm
+
+ld16: macro
+    ld a, LOW(\2)
+    ld [\1 + 0], a
+    ld a, HIGH(\2)
+    ld [\1 + 1], a
+endm
+
+
+const_def: macro
+if _NARG >= 1
+const_value = \1
+else
+const_value = 0
+endc
+if _NARG >= 2
+const_inc = \2
+else
+const_inc = 1
+endc
+endm
+
+const: macro
+\1 EQU const_value
+const_value = const_value + const_inc
+endm
+
+shift_const: macro
+\1 EQU (1 << const_value)
+const_value = const_value + const_inc
+endm
+
+const_skip: macro
+if _NARG >= 1
+const_value = const_value + const_inc * (\1)
+else
+const_value = const_value + const_inc
+endc
+endm
+
+const_next: macro
+if (const_value > 0 && \1 < const_value) || (const_value < 0 && \1 > const_value)
+fail "const_next cannot go backwards from {const_value} to \1"
+else
+const_value = \1
+endc
+endm
+
+const_dw: macro
+    const \1
+    dw \2
+endm