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; Value macros
; Many arbitrary percentages are simple base-10 or base-16 values:
; - 10 = 4 percent
; - 15 = 6 percent
; - $10 = 6 percent + 1 = 7 percent - 1
; - 20 = 8 percent
; - 25 = 10 percent
; - 30 = 12 percent
; - 40 = 16 percent
; - 50 = 20 percent - 1
; - 60 = 24 percent - 1
; - 70 = 28 percent - 1
; - 80 = 31 percent + 1 = 32 percent - 1
; - 85 = 33 percent + 1 = 34 percent - 1
; - 100 = 39 percent + 1 = 40 percent - 2
; - 120 = 47 percent + 1
; - 123 = 49 percent - 1
; - 160 = 63 percent
; - 180 = 71 percent - 1 = 70 percent + 2
; - 200 = 79 percent - 1
; - 230 = 90 percent + 1
percent EQUS "* $ff / 100"
; e.g. 1 out_of 2 == 50 percent + 1 == $80
out_of EQUS "* $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 ((\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 ; db HIGH(\1), LOW(\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
; Reverses FixPicBank in engine/gfx/load_pics.asm
;
; Takes the actual bank of the pic in the ROM and returns the "defined" bank
; $1f -> $13
; $20 -> $14
; $2e -> $1f
;
; Otherwise, the ROM bank will match the defined bank.
dba_pic: MACRO ; dbw bank, address
db (BANK(\1) == $1f) * ($13 - $1f) \
+ (BANK(\1) == $20) * ($14 - $20) \
+ (BANK(\1) == $2e) * ($1f - $2e) \
+ (BANK(\1))
dw \1
ENDM
bcd: MACRO
rept _NARG
dn ((\1) % 100) / 10, (\1) % 10
shift
endr
ENDM
sine_table: MACRO
; \1: amplitude
x = 0
rept 32
dw (sin(x) + (sin(x) & $ff)) >> 8 ; round up
x = x + (\1) * $40000
endr
ENDM
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