Reorganize macros

macros/data.asm

@@ -0,0 +1,121 @@
+; Constant data (db, dw, dl) macros
+
+dwb: MACRO
+	dw \1
+	db \2
+	ENDM
+
+dbw: MACRO
+	db \1
+	dw \2
+	ENDM
+
+dbbw: MACRO
+	db \1, \2
+	dw \3
+	ENDM
+
+dbww: MACRO
+	db \1
+	dw \2, \3
+	ENDM
+
+dbwww: MACRO
+	db \1
+	dw \2, \3, \4
+	ENDM
+
+dn: MACRO ; nybbles
+	rept _NARG / 2
+	db ((\1) << 4) | (\2)
+	shift
+	shift
+	endr
+	ENDM
+
+dc: MACRO ; "crumbs"
+	rept _NARG / 4
+	db ((\1) << 6) | ((\2) << 4) | ((\3) << 2) | (\4)
+	shift
+	shift
+	shift
+	shift
+	endr
+	ENDM
+
+dx: MACRO
+x = 8 * ((\1) - 1)
+	rept \1
+	db ((\2) >> x) & $ff
+x = x + -8
+	endr
+	ENDM
+
+dt: MACRO ; three-byte (big-endian)
+	dx 3, \1
+	ENDM
+
+dd: MACRO ; four-byte (big-endian)
+	dx 4, \1
+	ENDM
+
+bigdw: MACRO ; big-endian word
+	dx 2, \1
+	ENDM
+
+dba: MACRO ; dbw bank, address
+	rept _NARG
+	dbw BANK(\1), \1
+	shift
+	endr
+	ENDM
+
+dab: MACRO ; dwb address, bank
+	rept _NARG
+	dwb \1, BANK(\1)
+	shift
+	endr
+	ENDM
+
+dba_pic: MACRO ; dbw bank, address
+	db BANK(\1) - PICS_FIX
+	dw \1
+ENDM
+
+
+dbpixel: MACRO
+if _NARG >= 4
+	db \1 * 8 + \3, \2 * 8 + \4
+else
+	db \1 * 8, \2 * 8
+endc
+endm
+
+dsprite: MACRO
+; conditional segment is there because not every instance of
+; this macro is directly OAM
+if _NARG >= 7 ; y tile, y pxl, x tile, x pxl, vtile offset, flags, palette
+	db (\1 * 8) % $100 + \2, (\3 * 8) % $100 + \4, \5, (\6 << 3) + (\7 & 7)
+else
+	db (\1 * 8) % $100 + \2, (\3 * 8) % $100 + \4, \5, \6
+endc
+endm
+
+
+sine_wave: MACRO
+; \1: amplitude
+x = 0
+	rept $20
+	; Round up.
+	dw (sin(x) + (sin(x) & $ff)) >> 8
+x = x + (\1) * $40000
+	endr
+ENDM
+
+
+bcd: MACRO
+	rept _NARG
+	dn ((\1) % 100) / 10, (\1) % 10
+	shift
+	endr
+ENDM