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|
;\1 = event index
;\2 = return result in carry instead of zero flag
CheckEvent: MACRO
event_byte = ((\1) / 8)
ld a, [wEventFlags + event_byte]
IF _NARG > 1
IF ((\1) % 8) == 7
add a
ELSE
REPT ((\1) % 8) + 1
rrca
ENDR
ENDC
ELSE
bit (\1) % 8, a
ENDC
ENDM
;\1 = event index
CheckEventReuseA: MACRO
IF event_byte != ((\1) / 8)
event_byte = ((\1) / 8)
ld a, [wEventFlags + event_byte]
ENDC
bit (\1) % 8, a
ENDM
;\1 = event index
;\2 = event index of the last event used before the branch
CheckEventAfterBranchReuseA: MACRO
event_byte = ((\2) / 8)
IF event_byte != ((\1) / 8)
event_byte = ((\1) / 8)
ld a, [wEventFlags + event_byte]
ENDC
bit (\1) % 8, a
ENDM
;\1 = reg
;\2 = event index
;\3 = event index this event is relative to (optional, this is needed when there is a fixed flag address)
EventFlagBit: MACRO
IF _NARG > 2
ld \1, ((\3) % 8) + ((\2) - (\3))
ELSE
ld \1, (\2) % 8
ENDC
ENDM
;\1 = reg
;\2 = event index
EventFlagAddress: MACRO
event_byte = ((\2) / 8)
ld \1, wEventFlags + event_byte
ENDM
;\1 = event index
CheckEventHL: MACRO
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
bit (\1) % 8, [hl]
ENDM
;\1 = event index
CheckEventReuseHL: MACRO
IF event_byte != ((\1) / 8)
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
ENDC
bit (\1) % 8, [hl]
ENDM
; dangerous, only use when HL is guaranteed to be the desired value
;\1 = event index
CheckEventForceReuseHL: MACRO
event_byte = ((\1) / 8)
bit (\1) % 8, [hl]
ENDM
;\1 = event index
;\2 = event index of the last event used before the branch
CheckEventAfterBranchReuseHL: MACRO
event_byte = ((\2) / 8)
IF event_byte != ((\1) / 8)
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
ENDC
bit (\1) % 8, [hl]
ENDM
;\1 = event index
CheckAndSetEvent: MACRO
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
bit (\1) % 8, [hl]
set (\1) % 8, [hl]
ENDM
;\1 = event index
CheckAndResetEvent: MACRO
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
bit (\1) % 8, [hl]
res (\1) % 8, [hl]
ENDM
;\1 = event index
CheckAndSetEventA: MACRO
ld a, [wEventFlags + ((\1) / 8)]
bit (\1) % 8, a
set (\1) % 8, a
ld [wEventFlags + ((\1) / 8)], a
ENDM
;\1 = event index
CheckAndResetEventA: MACRO
ld a, [wEventFlags + ((\1) / 8)]
bit (\1) % 8, a
res (\1) % 8, a
ld [wEventFlags + ((\1) / 8)], a
ENDM
;\1 = event index
SetEvent: MACRO
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
set (\1) % 8, [hl]
ENDM
;\1 = event index
SetEventReuseHL: MACRO
IF event_byte != ((\1) / 8)
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
ENDC
set (\1) % 8, [hl]
ENDM
;\1 = event index
;\2 = event index of the last event used before the branch
SetEventAfterBranchReuseHL: MACRO
event_byte = ((\2) / 8)
IF event_byte != ((\1) / 8)
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
ENDC
set (\1) % 8, [hl]
ENDM
; dangerous, only use when HL is guaranteed to be the desired value
;\1 = event index
SetEventForceReuseHL: MACRO
event_byte = ((\1) / 8)
set (\1) % 8, [hl]
ENDM
;\1 = event index
;\2 = event index
;\3, \4, ... = additional (optional) event indices
SetEvents: MACRO
SetEvent \1
REPT _NARG - 1
SetEventReuseHL \2
SHIFT
ENDR
ENDM
;\1 = event index
ResetEvent: MACRO
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
res (\1) % 8, [hl]
ENDM
;\1 = event index
ResetEventReuseHL: MACRO
IF event_byte != ((\1) / 8)
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
ENDC
res (\1) % 8, [hl]
ENDM
;\1 = event index
;\2 = event index of the last event used before the branch
ResetEventAfterBranchReuseHL: MACRO
event_byte = ((\2) / 8)
IF event_byte != ((\1) / 8)
event_byte = ((\1) / 8)
ld hl, wEventFlags + event_byte
ENDC
res (\1) % 8, [hl]
ENDM
; dangerous, only use when HL is guaranteed to be the desired value
;\1 = event index
ResetEventForceReuseHL: MACRO
event_byte = ((\1) / 8)
res (\1) % 8, [hl]
ENDM
;\1 = event index
;\2 = event index
;\3 = event index (optional)
ResetEvents: MACRO
ResetEvent \1
REPT _NARG - 1
ResetEventReuseHL \2
SHIFT
ENDR
ENDM
;\1 = event index
;\2 = number of bytes away from the base address (optional, for matching the ROM)
dbEventFlagBit: MACRO
IF _NARG > 1
db ((\1) % 8) + ((\2) * 8)
ELSE
db ((\1) % 8)
ENDC
ENDM
;\1 = event index
;\2 = number of bytes away from the base address (optional, for matching the ROM)
dwEventFlagAddress: MACRO
IF _NARG > 1
dw wEventFlags + ((\1) / 8) - (\2)
ELSE
dw wEventFlags + ((\1) / 8)
ENDC
ENDM
;\1 = start
;\2 = end
SetEventRange: MACRO
event_start_byte = ((\1) / 8)
event_end_byte = ((\2) / 8)
IF event_end_byte < event_start_byte
FAIL "Incorrect argument order in SetEventRange."
ENDC
IF event_start_byte == event_end_byte
ld a, [wEventFlags + event_start_byte]
or (1 << (((\2) % 8) + 1)) - (1 << ((\1) % 8))
ld [wEventFlags + event_start_byte], a
ELSE
event_fill_start = event_start_byte + 1
event_fill_count = event_end_byte - event_start_byte - 1
IF ((\1) % 8) == 0
event_fill_start = event_fill_start - 1
event_fill_count = event_fill_count + 1
ELSE
ld a, [wEventFlags + event_start_byte]
or $ff - ((1 << ((\1) % 8)) - 1)
ld [wEventFlags + event_start_byte], a
ENDC
IF ((\2) % 8) == 7
event_fill_count = event_fill_count + 1
ENDC
IF event_fill_count == 1
ld hl, wEventFlags + event_fill_start
ld [hl], $ff
ENDC
IF event_fill_count > 1
ld a, $ff
ld hl, wEventFlags + event_fill_start
REPT event_fill_count - 1
ld [hli], a
ENDR
ld [hl], a
ENDC
IF ((\2) % 8) == 0
ld hl, wEventFlags + event_end_byte
set 0, [hl]
ELSE
IF ((\2) % 8) != 7
ld a, [wEventFlags + event_end_byte]
or (1 << (((\2) % 8) + 1)) - 1
ld [wEventFlags + event_end_byte], a
ENDC
ENDC
ENDC
ENDM
;\1 = start
;\2 = end
;\3 = assume a is 0 if present
ResetEventRange: MACRO
event_start_byte = ((\1) / 8)
event_end_byte = ((\2) / 8)
IF event_end_byte < event_start_byte
FAIL "Incorrect argument order in ResetEventRange."
ENDC
IF event_start_byte == event_end_byte
ld a, [wEventFlags + event_start_byte]
and ~((1 << (((\2) % 8) + 1)) - (1 << ((\1) % 8))) & $ff
ld [wEventFlags + event_start_byte], a
ELSE
event_fill_start = event_start_byte + 1
event_fill_count = event_end_byte - event_start_byte - 1
IF ((\1) % 8) == 0
event_fill_start = event_fill_start - 1
event_fill_count = event_fill_count + 1
ELSE
ld a, [wEventFlags + event_start_byte]
and ~($ff - ((1 << ((\1) % 8)) - 1)) & $ff
ld [wEventFlags + event_start_byte], a
ENDC
IF ((\2) % 8) == 7
event_fill_count = event_fill_count + 1
ENDC
IF event_fill_count == 1
ld hl, wEventFlags + event_fill_start
ld [hl], 0
ENDC
IF event_fill_count > 1
ld hl, wEventFlags + event_fill_start
; force xor a if we just to wrote to it above
IF (_NARG < 3) || (((\1) % 8) != 0)
xor a
ENDC
REPT event_fill_count - 1
ld [hli], a
ENDR
ld [hl], a
ENDC
IF ((\2) % 8) == 0
ld hl, wEventFlags + event_end_byte
res 0, [hl]
ELSE
IF ((\2) % 8) != 7
ld a, [wEventFlags + event_end_byte]
and ~((1 << (((\2) % 8) + 1)) - 1) & $ff
ld [wEventFlags + event_end_byte], a
ENDC
ENDC
ENDC
ENDM
; returns whether both events are set in Z flag
; This is counter-intuitive because the other event checks set the Z flag when
; the event is not set, but this sets the Z flag when the event is set.
;\1 = event index 1
;\2 = event index 2
;\3 = try to reuse a (optional)
CheckBothEventsSet: MACRO
IF ((\1) / 8) == ((\2) / 8)
IF (_NARG < 3) || (((\1) / 8) != event_byte)
event_byte = ((\1) / 8)
ld a, [wEventFlags + ((\1) / 8)]
ENDC
and (1 << ((\1) % 8)) | (1 << ((\2) % 8))
cp (1 << ((\1) % 8)) | (1 << ((\2) % 8))
ELSE
; This case doesn't happen in the original ROM.
IF ((\1) % 8) == ((\2) % 8)
push hl
ld a, [wEventFlags + ((\1) / 8)]
ld hl, wEventFlags + ((\2) / 8)
and [hl]
cpl
bit ((\1) % 8), a
pop hl
ELSE
push bc
ld a, [wEventFlags + ((\1) / 8)]
and (1 << ((\1) % 8))
ld b, a
ld a, [wEventFlags + ((\2) / 8)]
and (1 << ((\2) % 8))
or b
cp (1 << ((\1) % 8)) | (1 << ((\2) % 8))
pop bc
ENDC
ENDC
ENDM
; returns the complement of whether either event is set in Z flag
;\1 = event index 1
;\2 = event index 2
CheckEitherEventSet: MACRO
IF ((\1) / 8) == ((\2) / 8)
ld a, [wEventFlags + ((\1) / 8)]
and (1 << ((\1) % 8)) | (1 << ((\2) % 8))
ELSE
; This case doesn't happen in the original ROM.
IF ((\1) % 8) == ((\2) % 8)
push hl
ld a, [wEventFlags + ((\1) / 8)]
ld hl, wEventFlags + ((\2) / 8)
or [hl]
bit ((\1) % 8), a
pop hl
ELSE
push bc
ld a, [wEventFlags + ((\1) / 8)]
and (1 << ((\1) % 8))
ld b, a
ld a, [wEventFlags + ((\2) / 8)]
and (1 << ((\2) % 8))
or b
pop bc
ENDC
ENDC
ENDM
; for handling fixed event bits when events are inserted/removed
;\1 = event index
;\2 = fixed flag bit
AdjustEventBit: MACRO
IF ((\1) % 8) != (\2)
add ((\1) % 8) - (\2)
ENDC
ENDM
|
