pokecrystal-board/macros/data.asm
2022-10-02 22:03:53 -04:00

102 lines
1.7 KiB
NASM

; 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
DEF percent EQUS "* $ff / 100"
; e.g. 1 out_of 2 == 50 percent + 1 == $80
DEF out_of EQUS "* $100 /"
MACRO assert_power_of_2
assert (\1) & ((\1) - 1) == 0, "\1 must be a power of 2"
ENDM
; Constant data (db, dw, dl) macros
MACRO dwb
dw \1
db \2
ENDM
MACRO dbw
db \1
dw \2
ENDM
MACRO dn ; nybbles
rept _NARG / 2
db ((\1) << 4) | (\2)
shift 2
endr
ENDM
MACRO dc ; "crumbs"
rept _NARG / 4
db ((\1) << 6) | ((\2) << 4) | ((\3) << 2) | (\4)
shift 4
endr
ENDM
MACRO dt ; three-byte (big-endian)
db LOW((\1) >> 16), HIGH(\1), LOW(\1)
ENDM
MACRO dd ; four-byte (big-endian)
db HIGH((\1) >> 16), LOW((\1) >> 16), HIGH(\1), LOW(\1)
ENDM
MACRO bigdw ; big-endian word
db HIGH(\1), LOW(\1)
ENDM
MACRO dba ; dbw bank, address
rept _NARG
dbw BANK(\1), \1
shift
endr
ENDM
MACRO dab ; dwb address, bank
rept _NARG
dwb \1, BANK(\1)
shift
endr
ENDM
MACRO dba_pic ; dbw bank, address
db BANK(\1) - PICS_FIX
dw \1
ENDM
MACRO bcd
rept _NARG
dn ((\1) % 100) / 10, (\1) % 10
shift
endr
ENDM
MACRO sine_table
; \1 samples of sin(x) from x=0 to x<0.5 turns (pi radians)
for x, \1
dw sin(x * 0.5 / (\1))
endr
ENDM