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; Value macros
percent EQUS "* $ff / 100"
; 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 2
endr
ENDM
dc: MACRO ; "crumbs"
rept _NARG / 4
db ((\1) << 6) | ((\2) << 4) | ((\3) << 2) | (\4)
shift 4
endr
ENDM
dx: MACRO
x = 8 * ((\1) - 1)
rept \1
db LOW((\2) >> x)
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
; x tile, x pxl, y tile, y pxl
db \1 * 8 + \3, \2 * 8 + \4
else
; x, y
db \1 * 8, \2 * 8
endc
ENDM
dsprite: MACRO
; y tile, y pxl, x tile, x pxl, vtile offset, flags, attributes
db LOW(\1 * 8) + \2, LOW(\3 * 8) + \4, \5, \6
ENDM
menu_coords: MACRO
; x1, y1, x2, y2
db \2, \1 ; start coords
db \4, \3 ; end coords
ENDM
bcd: MACRO
rept _NARG
dn LOW(\1) / 10, (\1) % 10
shift
endr
ENDM
sine_table: MACRO
; \1 samples of sin(x) from x=0 to x<32768 (pi radians)
x = 0
rept \1
dw (sin(x) + LOW(sin(x))) >> 8 ; round up
x = x + DIV(32768, \1) ; a circle has 65536 "degrees"
endr
ENDM
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