mirror of
https://github.com/pret/pokered.git
synced 2024-10-22 22:55:31 +00:00
448 lines
8.5 KiB
NASM
448 lines
8.5 KiB
NASM
;\1 = event index
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;\2 = return result in carry instead of zero flag
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MACRO CheckEvent
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DEF event_byte = ((\1) / 8)
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ld a, [wEventFlags + event_byte]
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IF _NARG > 1
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IF ((\1) % 8) == 7
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add a
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ELSE
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REPT ((\1) % 8) + 1
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rrca
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ENDR
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ENDC
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ELSE
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bit (\1) % 8, a
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ENDC
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ENDM
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;\1 = event index
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MACRO CheckEventReuseA
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IF event_byte != ((\1) / 8)
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DEF event_byte = ((\1) / 8)
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ld a, [wEventFlags + event_byte]
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ENDC
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bit (\1) % 8, a
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ENDM
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;\1 = event index
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;\2 = event index of the last event used before the branch
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MACRO CheckEventAfterBranchReuseA
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DEF event_byte = ((\2) / 8)
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IF event_byte != ((\1) / 8)
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DEF event_byte = ((\1) / 8)
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ld a, [wEventFlags + event_byte]
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ENDC
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bit (\1) % 8, a
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ENDM
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;\1 = reg
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;\2 = event index
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;\3 = event index this event is relative to (optional, this is needed when there is a fixed flag address)
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MACRO EventFlagBit
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IF _NARG > 2
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ld \1, ((\3) % 8) + ((\2) - (\3))
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ELSE
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ld \1, (\2) % 8
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ENDC
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ENDM
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;\1 = reg
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;\2 = event index
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MACRO EventFlagAddress
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DEF event_byte = ((\2) / 8)
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ld \1, wEventFlags + event_byte
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ENDM
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;\1 = event index
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MACRO CheckEventHL
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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bit (\1) % 8, [hl]
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ENDM
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;\1 = event index
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MACRO CheckEventReuseHL
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IF event_byte != ((\1) / 8)
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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ENDC
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bit (\1) % 8, [hl]
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ENDM
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; dangerous, only use when HL is guaranteed to be the desired value
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;\1 = event index
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MACRO CheckEventForceReuseHL
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DEF event_byte = ((\1) / 8)
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bit (\1) % 8, [hl]
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ENDM
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;\1 = event index
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;\2 = event index of the last event used before the branch
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MACRO CheckEventAfterBranchReuseHL
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DEF event_byte = ((\2) / 8)
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IF event_byte != ((\1) / 8)
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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ENDC
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bit (\1) % 8, [hl]
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ENDM
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;\1 = event index
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MACRO CheckAndSetEvent
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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bit (\1) % 8, [hl]
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set (\1) % 8, [hl]
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ENDM
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;\1 = event index
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MACRO CheckAndResetEvent
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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bit (\1) % 8, [hl]
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res (\1) % 8, [hl]
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ENDM
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;\1 = event index
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MACRO CheckAndSetEventA
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ld a, [wEventFlags + ((\1) / 8)]
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bit (\1) % 8, a
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set (\1) % 8, a
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ld [wEventFlags + ((\1) / 8)], a
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ENDM
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;\1 = event index
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MACRO CheckAndResetEventA
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ld a, [wEventFlags + ((\1) / 8)]
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bit (\1) % 8, a
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res (\1) % 8, a
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ld [wEventFlags + ((\1) / 8)], a
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ENDM
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;\1 = event index
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MACRO SetEvent
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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set (\1) % 8, [hl]
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ENDM
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;\1 = event index
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MACRO SetEventReuseHL
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IF event_byte != ((\1) / 8)
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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ENDC
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set (\1) % 8, [hl]
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ENDM
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;\1 = event index
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;\2 = event index of the last event used before the branch
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MACRO SetEventAfterBranchReuseHL
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DEF event_byte = ((\2) / 8)
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IF event_byte != ((\1) / 8)
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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ENDC
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set (\1) % 8, [hl]
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ENDM
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; dangerous, only use when HL is guaranteed to be the desired value
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;\1 = event index
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MACRO SetEventForceReuseHL
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DEF event_byte = ((\1) / 8)
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set (\1) % 8, [hl]
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ENDM
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;\1 = event index
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;\2 = event index
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;\3, \4, ... = additional (optional) event indices
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MACRO SetEvents
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SetEvent \1
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REPT _NARG - 1
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SetEventReuseHL \2
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SHIFT
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ENDR
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ENDM
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;\1 = event index
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MACRO ResetEvent
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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res (\1) % 8, [hl]
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ENDM
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;\1 = event index
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MACRO ResetEventReuseHL
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IF event_byte != ((\1) / 8)
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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ENDC
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res (\1) % 8, [hl]
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ENDM
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;\1 = event index
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;\2 = event index of the last event used before the branch
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MACRO ResetEventAfterBranchReuseHL
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DEF event_byte = ((\2) / 8)
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IF event_byte != ((\1) / 8)
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DEF event_byte = ((\1) / 8)
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ld hl, wEventFlags + event_byte
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ENDC
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res (\1) % 8, [hl]
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ENDM
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; dangerous, only use when HL is guaranteed to be the desired value
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;\1 = event index
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MACRO ResetEventForceReuseHL
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DEF event_byte = ((\1) / 8)
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res (\1) % 8, [hl]
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ENDM
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;\1 = event index
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;\2 = event index
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;\3 = event index (optional)
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MACRO ResetEvents
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ResetEvent \1
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REPT _NARG - 1
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ResetEventReuseHL \2
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SHIFT
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ENDR
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ENDM
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;\1 = start
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;\2 = end
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MACRO SetEventRange
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DEF event_start_byte = ((\1) / 8)
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DEF event_end_byte = ((\2) / 8)
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IF event_end_byte < event_start_byte
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FAIL "Incorrect argument order in SetEventRange."
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ENDC
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IF event_start_byte == event_end_byte
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ld a, [wEventFlags + event_start_byte]
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or (1 << (((\2) % 8) + 1)) - (1 << ((\1) % 8))
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ld [wEventFlags + event_start_byte], a
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ELSE
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DEF event_fill_start = event_start_byte + 1
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DEF event_fill_count = event_end_byte - event_start_byte - 1
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IF ((\1) % 8) == 0
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DEF event_fill_start -= 1
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DEF event_fill_count += 1
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ELSE
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ld a, [wEventFlags + event_start_byte]
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or $ff - ((1 << ((\1) % 8)) - 1)
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ld [wEventFlags + event_start_byte], a
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ENDC
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IF ((\2) % 8) == 7
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DEF event_fill_count += 1
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ENDC
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IF event_fill_count == 1
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ld hl, wEventFlags + event_fill_start
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ld [hl], $ff
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ENDC
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IF event_fill_count > 1
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ld a, $ff
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ld hl, wEventFlags + event_fill_start
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REPT event_fill_count - 1
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ld [hli], a
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ENDR
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ld [hl], a
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ENDC
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IF ((\2) % 8) == 0
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ld hl, wEventFlags + event_end_byte
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set 0, [hl]
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ELSE
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IF ((\2) % 8) != 7
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ld a, [wEventFlags + event_end_byte]
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or (1 << (((\2) % 8) + 1)) - 1
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ld [wEventFlags + event_end_byte], a
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ENDC
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ENDC
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ENDC
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ENDM
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;\1 = start
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;\2 = end
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;\3 = assume a is 0 if present
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MACRO ResetEventRange
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DEF event_start_byte = ((\1) / 8)
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DEF event_end_byte = ((\2) / 8)
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IF event_end_byte < event_start_byte
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FAIL "Incorrect argument order in ResetEventRange."
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ENDC
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IF event_start_byte == event_end_byte
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ld a, [wEventFlags + event_start_byte]
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and ~((1 << (((\2) % 8) + 1)) - (1 << ((\1) % 8))) & $ff
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ld [wEventFlags + event_start_byte], a
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ELSE
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DEF event_fill_start = event_start_byte + 1
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DEF event_fill_count = event_end_byte - event_start_byte - 1
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IF ((\1) % 8) == 0
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DEF event_fill_start -= 1
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DEF event_fill_count += 1
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ELSE
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ld a, [wEventFlags + event_start_byte]
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and ~($ff - ((1 << ((\1) % 8)) - 1)) & $ff
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ld [wEventFlags + event_start_byte], a
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ENDC
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IF ((\2) % 8) == 7
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DEF event_fill_count += 1
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ENDC
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IF event_fill_count == 1
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ld hl, wEventFlags + event_fill_start
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ld [hl], 0
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ENDC
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IF event_fill_count > 1
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ld hl, wEventFlags + event_fill_start
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; force xor a if we just to wrote to it above
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IF (_NARG < 3) || (((\1) % 8) != 0)
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xor a
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ENDC
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REPT event_fill_count - 1
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ld [hli], a
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ENDR
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ld [hl], a
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ENDC
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IF ((\2) % 8) == 0
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ld hl, wEventFlags + event_end_byte
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res 0, [hl]
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ELSE
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IF ((\2) % 8) != 7
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ld a, [wEventFlags + event_end_byte]
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and ~((1 << (((\2) % 8) + 1)) - 1) & $ff
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ld [wEventFlags + event_end_byte], a
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ENDC
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ENDC
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ENDC
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ENDM
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; returns whether both events are set in Z flag
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; This is counter-intuitive because the other event checks set the Z flag when
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; the event is not set, but this sets the Z flag when the event is set.
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;\1 = event index 1
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;\2 = event index 2
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;\3 = try to reuse a (optional)
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MACRO CheckBothEventsSet
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IF ((\1) / 8) == ((\2) / 8)
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IF (_NARG < 3) || (((\1) / 8) != event_byte)
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DEF event_byte = ((\1) / 8)
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ld a, [wEventFlags + ((\1) / 8)]
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ENDC
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and (1 << ((\1) % 8)) | (1 << ((\2) % 8))
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cp (1 << ((\1) % 8)) | (1 << ((\2) % 8))
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ELSE
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; This case doesn't happen in the original ROM.
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IF ((\1) % 8) == ((\2) % 8)
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push hl
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ld a, [wEventFlags + ((\1) / 8)]
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ld hl, wEventFlags + ((\2) / 8)
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and [hl]
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cpl
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bit ((\1) % 8), a
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pop hl
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ELSE
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push bc
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ld a, [wEventFlags + ((\1) / 8)]
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and (1 << ((\1) % 8))
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ld b, a
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ld a, [wEventFlags + ((\2) / 8)]
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and (1 << ((\2) % 8))
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or b
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cp (1 << ((\1) % 8)) | (1 << ((\2) % 8))
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pop bc
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ENDC
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ENDC
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ENDM
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; returns the complement of whether either event is set in Z flag
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;\1 = event index 1
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;\2 = event index 2
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MACRO CheckEitherEventSet
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IF ((\1) / 8) == ((\2) / 8)
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ld a, [wEventFlags + ((\1) / 8)]
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and (1 << ((\1) % 8)) | (1 << ((\2) % 8))
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ELSE
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; This case doesn't happen in the original ROM.
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IF ((\1) % 8) == ((\2) % 8)
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push hl
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ld a, [wEventFlags + ((\1) / 8)]
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ld hl, wEventFlags + ((\2) / 8)
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or [hl]
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bit ((\1) % 8), a
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pop hl
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ELSE
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push bc
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ld a, [wEventFlags + ((\1) / 8)]
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and (1 << ((\1) % 8))
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ld b, a
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ld a, [wEventFlags + ((\2) / 8)]
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and (1 << ((\2) % 8))
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or b
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pop bc
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ENDC
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ENDC
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ENDM
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; for handling fixed event bits when events are inserted/removed
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;\1 = event index
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;\2 = fixed flag bit
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MACRO AdjustEventBit
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IF ((\1) % 8) != (\2)
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add ((\1) % 8) - (\2)
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ENDC
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ENDM
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