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66 lines
1.8 KiB
NASM
66 lines
1.8 KiB
NASM
MACRO ___wram_conversion_table
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; in:
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; 1: name of the table; will be prefixed to all definitions
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; 2: table size, in entries
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; 3: locked ID table size
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; 4: last allocations table size
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; 5: cache size
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assert (\2) <= $FE, \
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"16-bit conversion table error: too many table entries"
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assert (\2) >= $20, \
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"16-bit conversion table error: too many table entries"
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assert ((\3) + (\4)) <= (\2), \
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"16-bit conversion table error: too many fixed indexes"
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assert (\4) >= 2, \
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"16-bit conversion table error: recent allocations table must contain at least two entries"
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assert !((\5) & ((\5) - 1)), \
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"16-bit conversion table error: invalid cache size"
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assert ((\3) + (\4) + (\5)) <= $100, \
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"16-bit conversion table error: cache would straddle a $100 alignment boundary"
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\1::
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\1UsedSlots:: db
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\1LastAllocatedIndex:: db ; index into LastAllocated
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\1Entries:: ds 2 * (\2)
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\1EntriesEnd::
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; pad to a multiple of $100; ensure that the remaining values share the same high byte
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DEF ___total_bytes = 2 + (2 * (\2)) + (\3) + (\4) + (\5)
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if LOW(___total_bytes)
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ds $100 - LOW(___total_bytes)
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endc
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if \5
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\1EntryCache:: ds \5
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endc
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if \3
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\1LockedEntries:: ds \3
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endc
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\1LastAllocated:: ds \4
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\1End::
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ENDM
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MACRO wram_conversion_table
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; uses constants to invoke the macro above
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; in: WRAM prefix, constant prefix
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assert \2_MINIMUM_RESERVED_INDEX <= $FF, \
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"16-bit conversion table error: $FF must be declared as a reserved index"
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assert \2_ENTRIES < \2_MINIMUM_RESERVED_INDEX, \
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"16-bit conversion table error: table entries and reserved indexes overlap"
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___wram_conversion_table \1, \
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\2_ENTRIES, \
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\2_LOCKED_ENTRIES, \
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\2_SAVED_RECENT_INDEXES, \
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\2_CACHE_SIZE
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ENDM
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