Implement macros for engine flags

1 files changed, 45 insertions, 0 deletions

diff --git a/macros/flag.asm b/macros/flag.asm
new file mode 100755
index 00000000..c2b307f0
--- /dev/null
+++ b/macros/flag.asm
@@ -0,0 +1,45 @@
+engine_flag_def: macro
+	const \1
+\1_ADDR EQUS "\2"
+\1_BIT  EQU \3
+endm
+
+engine_flag: macro
+	dwb \1_ADDR, (1 << \1_BIT)
+endm
+
+CheckFlag: macro
+	ld a, [\1_ADDR]
+	bit \1_BIT, a
+endm
+
+CheckFlagHL: macro
+	ld hl, \1_ADDR
+	bit \1_BIT, [hl]
+endm
+
+SetFlag: macro
+	ld hl, \1_ADDR
+	set \1_BIT, [hl]
+endm
+
+ClearFlag: macro
+	ld hl, \1_ADDR
+	res \1_BIT, [hl]
+endm
+
+CheckFlagForceReuseA: macro
+	bit \1_BIT, a
+endm
+
+CheckFlagForceReuseHL: macro
+	bit \1_BIT, [hl]
+endm
+
+SetFlagForceReuseHL: macro
+	set \1_BIT, [hl]
+endm
+
+ClearFlagForceReuseHL: macro
+	res \1_BIT, [hl]
+endm