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Avoid "+- 1" at every maskbits

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This commit is contained in:
Remy Oukaour 2018-01-16 17:27:50 -05:00
parent 8048082114
commit 7b3de85a06
32 changed files with 79 additions and 76 deletions
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20
audio/engine.asm
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@ -1304,7 +1304,7 @@ ParseSFXOrRest: ; e8698
ld [hl], a ld [hl], a
; are we on the last channel? (noise sampling) ; are we on the last channel? (noise sampling)
ld a, [CurChannel] ld a, [CurChannel]
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
cp CHAN4 cp CHAN4
ret z ret z
; update hi frequency from next param ; update hi frequency from next param
@ -1668,7 +1668,7 @@ MusicEE; e883e
; if ????, jump ; if ????, jump
; get channel ; get channel
ld a, [CurChannel] ld a, [CurChannel]
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
ld e, a ld e, a
ld d, 0 ld d, 0
; hl = Channel1JumpCondition + channel id ; hl = Channel1JumpCondition + channel id
@ -1966,7 +1966,7 @@ Music_NoteType: ; e8963
add hl, bc add hl, bc
ld [hl], a ld [hl], a
ld a, [CurChannel] ld a, [CurChannel]
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
cp CHAN4 cp CHAN4
ret z ret z
; intensity ; intensity
@ -2414,7 +2414,7 @@ SetLRTracks: ; e8b1b
push de push de
; store current channel in de ; store current channel in de
ld a, [CurChannel] ld a, [CurChannel]
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
ld e, a ld e, a
ld d, 0 ld d, 0
; get this channel's lr tracks ; get this channel's lr tracks
@ -2449,7 +2449,7 @@ _PlayMusic:: ; e8b30
call LoadMusicByte ; store first byte of music header in a call LoadMusicByte ; store first byte of music header in a
rlca rlca
rlca rlca
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
inc a inc a
.loop .loop
; start playing channels ; start playing channels
@ -2505,7 +2505,7 @@ _PlayCryHeader:: ; e8b79
; Top 2 bits contain the number of channels ; Top 2 bits contain the number of channels
rlca rlca
rlca rlca
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
; For each channel: ; For each channel:
inc a inc a
@ -2530,7 +2530,7 @@ _PlayCryHeader:: ; e8b79
; No tempo for channel 4 ; No tempo for channel 4
ld a, [CurChannel] ld a, [CurChannel]
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
cp CHAN4 cp CHAN4
jr nc, .start jr nc, .start
@ -2669,7 +2669,7 @@ _PlaySFX:: ; e8c04
call LoadMusicByte call LoadMusicByte
rlca ; top 2 rlca ; top 2
rlca ; bits rlca ; bits
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
inc a ; # channels -> # loops inc a ; # channels -> # loops
.startchannels .startchannels
push af push af
@ -2722,7 +2722,7 @@ PlayStereoSFX:: ; e8ca6
call LoadMusicByte call LoadMusicByte
rlca rlca
rlca rlca
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
inc a inc a
.loop .loop
@ -2736,7 +2736,7 @@ PlayStereoSFX:: ; e8ca6
push de push de
; get tracks for this channel ; get tracks for this channel
ld a, [CurChannel] ld a, [CurChannel]
maskbits NUM_MUSIC_CHANS +- 1 maskbits NUM_MUSIC_CHANS
ld e, a ld e, a
ld d, 0 ld d, 0
call GetLRTracks call GetLRTracks

2
constants/pokemon_data_constants.asm
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@ -216,6 +216,8 @@ NUM_WATERMON EQU 3 ; data/wild/*_water.asm table size
GRASS_WILDDATA_LENGTH EQU (NUM_GRASSMON * 2 + 1) * 3 + 2 GRASS_WILDDATA_LENGTH EQU (NUM_GRASSMON * 2 + 1) * 3 + 2
WATER_WILDDATA_LENGTH EQU (NUM_WATERMON * 2 + 1) * 1 + 2 WATER_WILDDATA_LENGTH EQU (NUM_WATERMON * 2 + 1) * 1 + 2
NUM_ROAMMON_MAPS EQU 16 ; RoamMaps table size (see data/wild/roammon_maps.asm)
; swarms ; swarms

1
data/wild/roammon_maps.asm
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@ -13,6 +13,7 @@ endr
ENDM ENDM
RoamMaps: ; 2a40f RoamMaps: ; 2a40f
; there are NUM_ROAMMON_MAPS entries
roam_map ROUTE_29, 2, ROUTE_30, ROUTE_46 roam_map ROUTE_29, 2, ROUTE_30, ROUTE_46
roam_map ROUTE_30, 2, ROUTE_29, ROUTE_31 roam_map ROUTE_30, 2, ROUTE_29, ROUTE_31
roam_map ROUTE_31, 3, ROUTE_30, ROUTE_32, ROUTE_36 roam_map ROUTE_31, 3, ROUTE_30, ROUTE_32, ROUTE_36

2
engine/battle/ai/move.asm
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@ -186,7 +186,7 @@ AIChooseMove: ; 440ce
.ChooseMove: .ChooseMove:
ld hl, Buffer1 ld hl, Buffer1
call Random call Random
maskbits NUM_MOVES +- 1 maskbits NUM_MOVES
ld c, a ld c, a
ld b, 0 ld b, 0
add hl, bc add hl, bc

2
engine/battle/battle_transition.asm
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@ -640,7 +640,7 @@ StartTrainerBattle_LoadPokeBallGraphics: ; 8c5dc (23:45dc)
.cgb .cgb
ld hl, .daypals ld hl, .daypals
ld a, [TimeOfDayPal] ld a, [TimeOfDayPal]
maskbits NUM_DAYTIMES +- 1 maskbits NUM_DAYTIMES
cp DARKNESS_F cp DARKNESS_F
jr nz, .daytime jr nz, .daytime
ld hl, .nightpals ld hl, .nightpals

2
engine/battle/core.asm
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@ -6031,7 +6031,7 @@ ParseEnemyAction: ; 3e7c1
.loop2 .loop2
ld hl, EnemyMonMoves ld hl, EnemyMonMoves
call BattleRandom call BattleRandom
maskbits NUM_MOVES +- 1 maskbits NUM_MOVES
ld c, a ld c, a
ld b, 0 ld b, 0
add hl, bc add hl, bc

6
engine/battle/effect_commands.asm
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@ -932,7 +932,7 @@ BattleCommand_CheckObedience: ; 343db
.RandomMove: .RandomMove:
call BattleRandom call BattleRandom
maskbits NUM_MOVES +- 1 maskbits NUM_MOVES
cp b cp b
jr nc, .RandomMove jr nc, .RandomMove
@ -4387,7 +4387,7 @@ BattleCommand_SleepTalk: ; 35b33
.sample_move .sample_move
push hl push hl
call BattleRandom call BattleRandom
maskbits NUM_MOVES +- 1 maskbits NUM_MOVES
ld c, a ld c, a
ld b, 0 ld b, 0
add hl, bc add hl, bc
@ -8204,7 +8204,7 @@ BattleCommand_Conversion: ; 3707f
.done .done
.loop3 .loop3
call BattleRandom call BattleRandom
maskbits NUM_MOVES +- 1 maskbits NUM_MOVES
ld c, a ld c, a
ld b, 0 ld b, 0
ld hl, StringBuffer1 ld hl, StringBuffer1

4
engine/battle_anims/anim_commands.asm
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@ -1206,7 +1206,7 @@ BattleAnimCmd_Sound: ; cc7cd (33:47cd)
srl a srl a
ld [wSFXDuration], a ld [wSFXDuration], a
call .GetCryTrack call .GetCryTrack
maskbits NUM_NOISE_CHANS +- 1 maskbits NUM_NOISE_CHANS
ld [CryTracks], a ; CryTracks ld [CryTracks], a ; CryTracks
ld e, a ld e, a
@ -1243,7 +1243,7 @@ BattleAnimCmd_Sound: ; cc7cd (33:47cd)
BattleAnimCmd_Cry: ; cc807 (33:4807) BattleAnimCmd_Cry: ; cc807 (33:4807)
call GetBattleAnimByte call GetBattleAnimByte
maskbits NUM_NOISE_CHANS +- 1 maskbits NUM_NOISE_CHANS
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .CryData ld hl, .CryData

6
engine/color.asm
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@ -1230,7 +1230,7 @@ LoadMapPals:
ld l, a ld l, a
; Futher refine by time of day ; Futher refine by time of day
ld a, [TimeOfDayPal] ld a, [TimeOfDayPal]
maskbits NUM_DAYTIMES +- 1 maskbits NUM_DAYTIMES
add a add a
add a add a
add a add a
@ -1276,7 +1276,7 @@ LoadMapPals:
.got_pals .got_pals
ld a, [TimeOfDayPal] ld a, [TimeOfDayPal]
maskbits NUM_DAYTIMES +- 1 maskbits NUM_DAYTIMES
ld bc, 8 palettes ld bc, 8 palettes
ld hl, MapObjectPals ld hl, MapObjectPals
call AddNTimes call AddNTimes
@ -1300,7 +1300,7 @@ LoadMapPals:
ld de, RoofPals ld de, RoofPals
add hl, de add hl, de
ld a, [TimeOfDayPal] ld a, [TimeOfDayPal]
maskbits NUM_DAYTIMES +- 1 maskbits NUM_DAYTIMES
cp NITE_F cp NITE_F
jr c, .morn_day jr c, .morn_day
rept 4 rept 4

6
engine/events/battle_tower/load_trainer.asm
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@ -27,12 +27,12 @@ Function_LoadOpponentTrainerAndPokemons: ; 1f8000
add b add b
ld b, a ; b contains the nr of the trainer ld b, a ; b contains the nr of the trainer
if DEF(_CRYSTAL11) if DEF(_CRYSTAL11)
maskbits BATTLETOWER_NUM_UNIQUE_TRAINERS +- 1 maskbits BATTLETOWER_NUM_UNIQUE_TRAINERS
cp BATTLETOWER_NUM_UNIQUE_TRAINERS cp BATTLETOWER_NUM_UNIQUE_TRAINERS
else else
; Crystal 1.0 used the wrong constant here, so only the first 21 ; Crystal 1.0 used the wrong constant here, so only the first 21
; trainers in BattleTowerTrainers can be sampled. ; trainers in BattleTowerTrainers can be sampled.
maskbits BATTLETOWER_NUM_UNIQUE_PKMN +- 1 maskbits BATTLETOWER_NUM_UNIQUE_PKMN
cp BATTLETOWER_NUM_UNIQUE_PKMN cp BATTLETOWER_NUM_UNIQUE_PKMN
endc endc
jr nc, .resample jr nc, .resample
@ -115,7 +115,7 @@ Function_LoadRandomBattleTowerPkmn: ; 1f8081
ld a, [hRandomAdd] ld a, [hRandomAdd]
add b add b
ld b, a ld b, a
maskbits BATTLETOWER_NUM_UNIQUE_PKMN +- 1 maskbits BATTLETOWER_NUM_UNIQUE_PKMN
cp BATTLETOWER_NUM_UNIQUE_PKMN cp BATTLETOWER_NUM_UNIQUE_PKMN
jr nc, .resample jr nc, .resample
; in register 'a' is the chosen Pkmn of the LevelGroup ; in register 'a' is the chosen Pkmn of the LevelGroup

2
engine/events/buena.asm
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@ -17,7 +17,7 @@ Special_BuenasPassword: ; 8af6b
ld a, [MenuSelection] ld a, [MenuSelection]
ld c, a ld c, a
ld a, [wBuenasPassword] ld a, [wBuenasPassword]
maskbits NUM_PASSWORDS_PER_CATEGORY +- 1 maskbits NUM_PASSWORDS_PER_CATEGORY
cp c cp c
jr nz, .wrong jr nz, .wrong
ld b, $1 ld b, $1

2
engine/events/fish.asm
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@ -80,7 +80,7 @@ rept 4
endr endr
ld a, [TimeOfDay] ld a, [TimeOfDay]
maskbits NUM_DAYTIMES +- 1 maskbits NUM_DAYTIMES
cp NITE_F cp NITE_F
jr c, .time_species jr c, .time_species
inc hl inc hl

2
engine/events/magnet_train.asm
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@ -435,7 +435,7 @@ MagnetTrain_Jumptable_FirstRunThrough: ; 8ceae
ld a, [wEnvironment] ld a, [wEnvironment]
push af push af
ld a, [TimeOfDay] ld a, [TimeOfDay]
maskbits NUM_DAYTIMES +- 1 maskbits NUM_DAYTIMES
ld [TimeOfDayPal], a ld [TimeOfDayPal], a
ld a, $1 ld a, $1
ld [wEnvironment], a ld [wEnvironment], a

2
engine/events/poisonstep_pals.asm
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@ -10,7 +10,7 @@ LoadPoisonBGPals: ; cbcdd
and a and a
jr nz, .cgb jr nz, .cgb
ld a, [TimeOfDayPal] ld a, [TimeOfDayPal]
maskbits NUM_DAYTIMES +- 1 maskbits NUM_DAYTIMES
cp DARKNESS_F cp DARKNESS_F
ld a, %00000000 ld a, %00000000
jr z, .convert_pals jr z, .convert_pals

2
engine/item_effects.asm
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@ -775,7 +775,7 @@ GetPokedexEntryBank:
ld a, [EnemyMonSpecies] ld a, [EnemyMonSpecies]
rlca rlca
rlca rlca
maskbits NUM_DEX_ENTRY_BANKS +- 1 maskbits NUM_DEX_ENTRY_BANKS
ld hl, .PokedexEntryBanks ld hl, .PokedexEntryBanks
ld d, 0 ld d, 0
ld e, a ld e, a

2
engine/load_font.asm
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@ -82,7 +82,7 @@ _LoadFontsBattleExtra:: ; fb4be
LoadFrame: ; fb4cc LoadFrame: ; fb4cc
ld a, [TextBoxFrame] ld a, [TextBoxFrame]
maskbits NUM_FRAMES +- 1 maskbits NUM_FRAMES
ld bc, 6 * LEN_1BPP_TILE ld bc, 6 * LEN_1BPP_TILE
ld hl, Frames ld hl, Frames
call AddNTimes call AddNTimes

2
engine/map_objects.asm
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@ -893,7 +893,7 @@ MapObjectMovementPattern: ; 47dd
ld hl, OBJECT_DIRECTION_WALKING ld hl, OBJECT_DIRECTION_WALKING
add hl, de add hl, de
ld a, [hl] ld a, [hl]
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
ld d, 1 * 8 + 6 ld d, 1 * 8 + 6
cp DOWN cp DOWN
jr z, .ok_13 jr z, .ok_13

6
engine/npc_movement.asm
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@ -106,7 +106,7 @@ Function6f3e: ; 6f3e
ld hl, OBJECT_DIRECTION_WALKING ld hl, OBJECT_DIRECTION_WALKING
add hl, bc add hl, bc
ld a, [hl] ld a, [hl]
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .data_6f5b ld hl, .data_6f5b
@ -131,7 +131,7 @@ Function6f5f: ; 6f5f
push af push af
ld hl, OBJECT_DIRECTION_WALKING ld hl, OBJECT_DIRECTION_WALKING
add hl, bc add hl, bc
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .data_6f7b ld hl, .data_6f7b
@ -178,7 +178,7 @@ Function6fa1: ; 6fa1
ld hl, OBJECT_DIRECTION_WALKING ld hl, OBJECT_DIRECTION_WALKING
add hl, bc add hl, bc
ld a, [hl] ld a, [hl]
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
jr z, .down jr z, .down
dec a dec a
jr z, .up jr z, .up

8
engine/pack.asm
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@ -954,7 +954,7 @@ InitPackBuffers: ; 1068a
ld [wJumptableIndex], a ld [wJumptableIndex], a
; pocket id -> jumptable index ; pocket id -> jumptable index
ld a, [wLastPocket] ld a, [wLastPocket]
maskbits NUM_POCKETS +- 1 maskbits NUM_POCKETS
ld [wCurrPocket], a ld [wCurrPocket], a
inc a inc a
add a add a
@ -1099,7 +1099,7 @@ DepositSellTutorial_InterpretJoypad: ; 1076f
.d_left .d_left
ld a, [wJumptableIndex] ld a, [wJumptableIndex]
dec a dec a
maskbits NUM_POCKETS +- 1 maskbits NUM_POCKETS
ld [wJumptableIndex], a ld [wJumptableIndex], a
push de push de
ld de, SFX_SWITCH_POCKETS ld de, SFX_SWITCH_POCKETS
@ -1111,7 +1111,7 @@ DepositSellTutorial_InterpretJoypad: ; 1076f
.d_right .d_right
ld a, [wJumptableIndex] ld a, [wJumptableIndex]
inc a inc a
maskbits NUM_POCKETS +- 1 maskbits NUM_POCKETS
ld [wJumptableIndex], a ld [wJumptableIndex], a
push de push de
ld de, SFX_SWITCH_POCKETS ld de, SFX_SWITCH_POCKETS
@ -1281,7 +1281,7 @@ WaitBGMap_DrawPackGFX: ; 1089a (4:489a)
call WaitBGMap call WaitBGMap
DrawPackGFX: ; 1089d DrawPackGFX: ; 1089d
ld a, [wCurrPocket] ld a, [wCurrPocket]
maskbits NUM_POCKETS +- 1 maskbits NUM_POCKETS
ld e, a ld e, a
ld d, $0 ld d, $0
ld a, [BattleType] ld a, [BattleType]

8
engine/player_movement.asm
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@ -140,7 +140,7 @@ DoPlayerMovement:: ; 80000
.water .water
ld a, c ld a, c
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
ld c, a ld c, a
ld b, 0 ld b, 0
ld hl, .water_table ld hl, .water_table
@ -244,7 +244,7 @@ DoPlayerMovement:: ; 80000
ld a, [PlayerDirection] ld a, [PlayerDirection]
rrca rrca
rrca rrca
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
cp e cp e
jr z, .not_turning jr z, .not_turning
@ -430,7 +430,7 @@ DoPlayerMovement:: ; 80000
ld a, [PlayerDirection] ld a, [PlayerDirection]
rrca rrca
rrca rrca
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
cp e cp e
jr nz, .not_warp jr nz, .not_warp
call WarpCheck call WarpCheck
@ -559,7 +559,7 @@ DoPlayerMovement:: ; 80000
cp 0 cp 0
ret z ret z
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .forced_dpad ld hl, .forced_dpad

2
engine/player_object.asm
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@ -589,7 +589,7 @@ Special_SurfStartStep: ; 8379
ld a, [PlayerDirection] ld a, [PlayerDirection]
srl a srl a
srl a srl a
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .movement_data ld hl, .movement_data

2
engine/pokedex_2.asm
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@ -230,7 +230,7 @@ GetDexEntryPointer: ; 44333
push de push de
rlca rlca
rlca rlca
maskbits NUM_DEX_ENTRY_BANKS +- 1 maskbits NUM_DEX_ENTRY_BANKS
ld hl, .PokedexEntryBanks ld hl, .PokedexEntryBanks
ld d, 0 ld d, 0
ld e, a ld e, a

4
engine/pokegear.asm
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@ -251,7 +251,7 @@ InitPokegearTilemap: ; 90da8 (24:4da8)
ld a, $4f ld a, $4f
call ByteFill call ByteFill
ld a, [wPokegearCard] ld a, [wPokegearCard]
maskbits NUM_POKEGEAR_CARDS +- 1 maskbits NUM_POKEGEAR_CARDS
add a add a
ld e, a ld e, a
ld d, 0 ld d, 0
@ -289,7 +289,7 @@ InitPokegearTilemap: ; 90da8 (24:4da8)
ld [hWY], a ld [hWY], a
; swap region maps ; swap region maps
ld a, [wPokegearMapRegion] ld a, [wPokegearMapRegion]
maskbits NUM_REGIONS +- 1 maskbits NUM_REGIONS
xor 1 xor 1
ld [wPokegearMapRegion], a ld [wPokegearMapRegion], a
ret ret

18
engine/radio.asm
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@ -247,7 +247,7 @@ endr
; Generate a number, either 0, 1, or 2, to choose a time of day. ; Generate a number, either 0, 1, or 2, to choose a time of day.
.loop2 .loop2
call Random call Random
maskbits NUM_DAYTIMES +- 1 maskbits NUM_DAYTIMES
cp DARKNESS_F cp DARKNESS_F
jr z, .loop2 jr z, .loop2
@ -351,7 +351,7 @@ OaksPkmnTalk8:
; 0-15 are all valid indexes into .Adverbs, ; 0-15 are all valid indexes into .Adverbs,
; so no need for a retry loop ; so no need for a retry loop
call Random call Random
maskbits NUM_OAKS_MON_TALK_ADVERBS +- 1 maskbits NUM_OAKS_MON_TALK_ADVERBS
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .Adverbs ld hl, .Adverbs
@ -466,7 +466,7 @@ OaksPkmnTalk9:
; 0-15 are all valid indexes into .Adjectives, ; 0-15 are all valid indexes into .Adjectives,
; so no need for a retry loop ; so no need for a retry loop
call Random call Random
maskbits NUM_OAKS_MON_TALK_ADJECTIVES +- 1 maskbits NUM_OAKS_MON_TALK_ADJECTIVES
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .Adjectives ld hl, .Adjectives
@ -692,7 +692,7 @@ PokedexShow_GetDexEntryBank:
dec a dec a
rlca rlca
rlca rlca
maskbits NUM_DEX_ENTRY_BANKS +- 1 maskbits NUM_DEX_ENTRY_BANKS
ld hl, .PokedexEntryBanks ld hl, .PokedexEntryBanks
ld d, 0 ld d, 0
ld e, a ld e, a
@ -1164,7 +1164,7 @@ PnP_Text3:
PeoplePlaces4: ; People PeoplePlaces4: ; People
call Random call Random
maskbits NUM_TRAINER_CLASSES +- 1 maskbits NUM_TRAINER_CLASSES
inc a inc a
cp NUM_TRAINER_CLASSES - 1 cp NUM_TRAINER_CLASSES - 1
jr nc, PeoplePlaces4 jr nc, PeoplePlaces4
@ -1208,7 +1208,7 @@ PeoplePlaces5:
; 0-15 are all valid indexes into .Adjectives, ; 0-15 are all valid indexes into .Adjectives,
; so no need for a retry loop ; so no need for a retry loop
call Random call Random
maskbits NUM_PNP_PEOPLE_ADJECTIVES +- 1 maskbits NUM_PNP_PEOPLE_ADJECTIVES
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .Adjectives ld hl, .Adjectives
@ -1358,7 +1358,7 @@ PeoplePlaces7:
; 0-15 are all valid indexes into .Adjectives, ; 0-15 are all valid indexes into .Adjectives,
; so no need for a retry loop ; so no need for a retry loop
call Random call Random
maskbits NUM_PNP_PLACES_ADJECTIVES +- 1 maskbits NUM_PNP_PLACES_ADJECTIVES
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .Adjectives ld hl, .Adjectives
@ -1565,7 +1565,7 @@ BuenasPassword4:
; There are only 11 groups to choose from. ; There are only 11 groups to choose from.
.greater_than_11 .greater_than_11
call Random call Random
maskbits NUM_PASSWORD_CATEGORIES +- 1 maskbits NUM_PASSWORD_CATEGORIES
cp NUM_PASSWORD_CATEGORIES cp NUM_PASSWORD_CATEGORIES
jr nc, .greater_than_11 jr nc, .greater_than_11
; Store it in the high nybble of e. ; Store it in the high nybble of e.
@ -1574,7 +1574,7 @@ BuenasPassword4:
; For each group, choose one of the three passwords. ; For each group, choose one of the three passwords.
.greater_than_three .greater_than_three
call Random call Random
maskbits NUM_PASSWORDS_PER_CATEGORY +- 1 maskbits NUM_PASSWORDS_PER_CATEGORY
cp NUM_PASSWORDS_PER_CATEGORY cp NUM_PASSWORDS_PER_CATEGORY
jr nc, .greater_than_three jr nc, .greater_than_three
; The high nybble of wBuenasPassword will now contain the password group index, and the low nybble contains the actual password. ; The high nybble of wBuenasPassword will now contain the password group index, and the low nybble contains the actual password.

4
engine/scripting.asm
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@ -614,7 +614,7 @@ GetPocketName:
ld a, [wItemAttributeParamBuffer] ld a, [wItemAttributeParamBuffer]
dec a dec a
ld hl, .Pockets ld hl, .Pockets
maskbits NUM_POCKETS +- 1 maskbits NUM_POCKETS
add a add a
ld e, a ld e, a
ld d, 0 ld d, 0
@ -2474,7 +2474,7 @@ Script_warpfacing:
; parameters: facing, map_group, map_id, x, y ; parameters: facing, map_group, map_id, x, y
call GetScriptByte call GetScriptByte
maskbits NUM_DIRECTIONS +- 1 maskbits NUM_DIRECTIONS
ld c, a ld c, a
ld a, [wPlayerSpriteSetupFlags] ld a, [wPlayerSpriteSetupFlags]
set 5, a set 5, a

8
engine/stats_screen.asm
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@ -283,7 +283,7 @@ StatsScreen_GetJoypad: ; 4de2c (13:5e2c)
StatsScreen_JoypadAction: ; 4de54 (13:5e54) StatsScreen_JoypadAction: ; 4de54 (13:5e54)
push af push af
ld a, [wcf64] ld a, [wcf64]
maskbits NUM_STAT_PAGES +- 1 maskbits NUM_STAT_PAGES
ld c, a ld c, a
pop af pop af
bit B_BUTTON_F, a bit B_BUTTON_F, a
@ -512,7 +512,7 @@ StatsScreen_LoadGFX: ; 4dfb6 (13:5fb6)
.ClearBox: ; 4dfda (13:5fda) .ClearBox: ; 4dfda (13:5fda)
ld a, [wcf64] ld a, [wcf64]
maskbits NUM_STAT_PAGES +- 1 maskbits NUM_STAT_PAGES
ld c, a ld c, a
call StatsScreen_LoadPageIndicators call StatsScreen_LoadPageIndicators
hlcoord 0, 8 hlcoord 0, 8
@ -522,7 +522,7 @@ StatsScreen_LoadGFX: ; 4dfb6 (13:5fb6)
.LoadPals: ; 4dfed (13:5fed) .LoadPals: ; 4dfed (13:5fed)
ld a, [wcf64] ld a, [wcf64]
maskbits NUM_STAT_PAGES +- 1 maskbits NUM_STAT_PAGES
ld c, a ld c, a
farcall LoadStatsScreenPals farcall LoadStatsScreenPals
call DelayFrame call DelayFrame
@ -532,7 +532,7 @@ StatsScreen_LoadGFX: ; 4dfb6 (13:5fb6)
.PageTilemap: ; 4e002 (13:6002) .PageTilemap: ; 4e002 (13:6002)
ld a, [wcf64] ld a, [wcf64]
maskbits NUM_STAT_PAGES +- 1 maskbits NUM_STAT_PAGES
dec a dec a
ld hl, .Jumptable ld hl, .Jumptable
rst JumpTable rst JumpTable

2
engine/trade_animation.asm
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@ -552,7 +552,7 @@ TradeAnim_GetTrademonSFX: ; 29277
; 29281 ; 29281
TradeAnim_TubeAnimJumptable: ; 29281 TradeAnim_TubeAnimJumptable: ; 29281
maskbits TRADEANIMJUMPTABLE_LENGTH +- 1 maskbits TRADEANIMJUMPTABLE_LENGTH
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .Jumptable ld hl, .Jumptable

2
engine/unown_puzzle.asm
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@ -835,7 +835,7 @@ INCBIN "gfx/unown_puzzle/tile_borders.2bpp"
LoadUnownPuzzlePiecesGFX: ; e17a3 LoadUnownPuzzlePiecesGFX: ; e17a3
ld a, [ScriptVar] ld a, [ScriptVar]
maskbits NUM_UNOWN_PUZZLES +- 1 maskbits NUM_UNOWN_PUZZLES
ld e, a ld e, a
ld d, 0 ld d, 0
ld hl, .LZPointers ld hl, .LZPointers

10
engine/wildmons.asm
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@ -739,11 +739,11 @@ JumpRoamMons: ; 2a394
JumpRoamMon: ; 2a3cd JumpRoamMon: ; 2a3cd
.loop .loop
ld hl, RoamMaps ld hl, RoamMaps
.innerloop1 ; This loop is completely unnecessary. .innerloop1 ; This loop happens to be unnecessary.
call Random ; Choose a random number. call Random ; Choose a random number.
maskbits $10 - 1 ; Mask the number to limit it between 0 and 15. maskbits NUM_ROAMMON_MAPS ; Mask the number to limit it between 0 and 15.
cp $10 ; If the number is not less than 16, try again. cp NUM_ROAMMON_MAPS ; If the number is not less than 16, try again.
jr nc, .innerloop1 ; I'm sure you can guess why this check is bogus. jr nc, .innerloop1 ; I'm sure you can guess why this check is bogus.
inc a inc a
ld b, a ld b, a
.innerloop2 ; Loop to get hl to the address of the chosen roam map. .innerloop2 ; Loop to get hl to the address of the chosen roam map.

6
home/time.asm
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@ -48,17 +48,17 @@ GetClock:: ; 5b7
ld [hl], RTC_S ld [hl], RTC_S
ld a, [de] ld a, [de]
maskbits 60 - 1 maskbits 60
ld [hRTCSeconds], a ld [hRTCSeconds], a
ld [hl], RTC_M ld [hl], RTC_M
ld a, [de] ld a, [de]
maskbits 60 - 1 maskbits 60
ld [hRTCMinutes], a ld [hRTCMinutes], a
ld [hl], RTC_H ld [hl], RTC_H
ld a, [de] ld a, [de]
maskbits 24 - 1 maskbits 24
ld [hRTCHours], a ld [hRTCHours], a
ld [hl], RTC_DL ld [hl], RTC_DL

8
macros/code.asm
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@ -37,17 +37,17 @@ ENDM
maskbits: MACRO maskbits: MACRO
; masks just enough bits to cover the argument ; masks just enough bits to cover the argument
; e.g. "maskbits %00010100" becomes "and %00011111" ; e.g. "maskbits 26" becomes "and %00011111" (since 26 - 1 = %00011001)
; example usage in rejection sampling: ; example usage in rejection sampling:
; .loop ; .loop
; call Random ; call Random
; maskbits 30 +- 1 ; maskbits 30
; cp 30 ; cp 30
; jr nc, .loop ; jr nc, .loop
x = 1 x = 1
rept 8 rept 8
if x < (\1) if x + 1 < (\1)
x = (x + 1) * 2 +- 1 x = x << 1 | 1
endc endc
endr endr
and x and x

2
mobile/mobile_41.asm
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@ -1072,7 +1072,7 @@ Function106464:: ; 106464
Function10649b: ; 10649b Function10649b: ; 10649b
ld a, [TextBoxFrame] ld a, [TextBoxFrame]
maskbits NUM_FRAMES +- 1 maskbits NUM_FRAMES
ld bc, 6 * LEN_1BPP_TILE ld bc, 6 * LEN_1BPP_TILE
ld hl, Frames ld hl, Frames
call AddNTimes call AddNTimes