mirror of
https://github.com/g012/l65.git
synced 2024-11-15 19:09:19 +00:00
712 lines
30 KiB
Lua
712 lines
30 KiB
Lua
local M = {}
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local symbols={} M.symbols=symbols
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local locations={} M.locations=locations
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local stats={} M.stats=stats
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M.__index = M
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symbols.__index = symbols
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setmetatable(M, symbols)
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M.link = function()
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if stats.unused then return end
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stats.unused = 0
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stats.cycles = 0
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for _,location in ipairs(locations) do
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local sections = location.sections
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local chunk_reserve = function(chunk_ix, chunk, start, size)
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if start == chunk.start then
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if size == chunk.size then location.chunks[chunk_ix] = nil
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else chunk.start=start+size chunk.size=chunk.size-size end
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else
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if chunk.size - (start - chunk.start) == size then chunk.size = chunk.size - size
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else
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local sz = start - chunk.start
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table.insert(location.chunks, chunk_ix+1, { start=start+size, size=chunk.size-(sz+size) })
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chunk.size = sz
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end
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end
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end
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-- filter sections list
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local position_independent_sections = {}
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local symbols_to_remove = {}
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location.cycles=0
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for ix,section in ipairs(sections) do
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section:compute_size()
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location.cycles = location.cycles + section.cycles
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if section.size == 0 then
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sections[ix]=nil
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if not section.org then table.insert(symbols_to_remove, section.label) end
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elseif not section.org then table.insert(position_independent_sections, section) end
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end
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for _,v in ipairs(symbols_to_remove) do symbols[v] = nil end
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stats.cycles = stats.cycles + location.cycles
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-- fixed position sections
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for section_ix,section in ipairs(sections) do if section.org then
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if section.org < location.start or section.org > location.finish then
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error("ORG section " .. section.label .. " starts outside container location")
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end
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for chunk_ix,chunk in ipairs(location.chunks) do
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if chunk.start <= section.org and chunk.size - (section.org - chunk.start) >= section.size then
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chunk_reserve(chunk_ix, chunk, section.org, section.size)
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symbols[section.label] = section.org
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goto chunk_located
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end
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end
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error("ORG section " .. section.label .. " overflows its location")
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::chunk_located::
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end end
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-- position independent sections
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table.sort(position_independent_sections, function(a,b) return a.size==b.size and a.label>b.label or a.size>b.size end)
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for _,section in ipairs(position_independent_sections) do
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local chunks = {}
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for _,chunk in ipairs(location.chunks) do
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if chunk.size >= section.size then chunks[#chunks+1] = chunk end
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end
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table.sort(chunks, function(a,b) return a.size < b.size end)
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for chunk_ix,chunk in ipairs(chunks) do
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local waste,position = math.maxinteger
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local usage_lowest = function(start, finish)
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local inc=1
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if section.align then
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start = (start + section.align - 1) // section.align * section.align
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if section.offset then start = start + section.offset end
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inc = section.align
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end
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for address=start,finish,inc do
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for _,constraint in ipairs(section.constraints) do
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local from, to = address+constraint.from, address+constraint.to
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if from // 0x100 == to // 0x100 then
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if constraint.type == 'crosspage' then goto constraints_not_met end
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else
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if constraint.type == 'samepage' then goto constraints_not_met end
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end
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end
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local w = math.min(address - chunk.start, chunk.size - (address+section.size - chunk.start))
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if w < waste then waste=w position=address
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elseif w==waste then
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-- if waste is the same, keep the one that leaves most aligned addresses for other sections
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-- TODO
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if position and address>position then waste=w position=address end
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end
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::constraints_not_met::
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end
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end
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local finish = math.min(chunk.start + 0xff, chunk.start + chunk.size - section.size)
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usage_lowest(chunk.start, finish)
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if chunk.size ~= math.huge then
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local start = math.max(chunk.start + chunk.size - section.size - 0xff, chunk.start)
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usage_lowest(start, chunk.start + chunk.size - section.size)
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end
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if position then
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chunk_reserve(chunk_ix, chunk, position, section.size)
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section.org = position
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symbols[section.label] = position
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goto chunk_located
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end
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end
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error("unable to find space for section " .. section.label)
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::chunk_located::
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end
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-- unused space stats
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local unused = 0
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for _,chunk in ipairs(location.chunks) do unused = unused + chunk.size - chunk.start end
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location.unused = unused
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stats.unused = stats.unused + unused
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end
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end
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M.resolve = function()
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if stats.resolved_count then return end
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M.link()
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stats.resolved_count = 0
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local count = 0
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for k,v in pairs(symbols) do if k ~= '__index' then
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local t = type(v)
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if t == 'function' then v=v() t=type(v) symbols[k]=v count=count+1 end
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if t == 'table' and type(v.resolve) == 'function' then symbols[k]=v.resolve() count=count+1
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elseif t == 'string' then symbols[k]=symbols[v] count=count+1 end
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end end
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stats.resolved_count = count
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-- set local label references resolver
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local llresolver = { __index = function(tab,key)
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if type(key) ~= 'string' or key:sub(1,1) ~= '_' then return nil end
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return symbols[M.label_current .. key]
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end }
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setmetatable(symbols, llresolver)
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end
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M.genbin = function(filler)
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if #locations == 0 then return end
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if not filler then filler = 0 end -- brk opcode
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M.resolve()
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local bin = {}
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local ins,mov = table.insert,table.move
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table.sort(locations, function(a,b) return a.start < b.start end)
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local of0 = locations[1].start
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for _,location in ipairs(locations) do
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if location.start < #bin then
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error(string.format("location [%04x,%04x] overlaps another", location.start, location.finish))
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end
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for i=#bin+of0,location.start-1 do ins(bin, filler) end
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M.size=0 M.cycles=0
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local sections = location.sections
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table.sort(sections, function(a,b) return a.org < b.org end)
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for _,section in ipairs(sections) do
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assert(section.org >= #bin+of0)
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for i=#bin+of0,section.org-1 do ins(bin, filler) end
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M.label_current = section.label
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for _,instruction in ipairs(section.instructions) do
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local b,f = instruction.bin,instruction.asbin
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if b then mov(b,1,#b,#bin+1,bin)
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elseif f then f(bin) end
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M.size=#bin M.cycles=M.cycles+(instruction.cycles or 0)
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end
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end
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if location.finish then
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for i=#bin+of0,location.finish do ins(bin, filler) end
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end
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end
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return bin
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end
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M.writebin = function(filename, bin)
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if not filename then filename = 'main.bin' end
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if not bin then bin = M.genbin() end
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local f = assert(io.open(filename, "wb"), "failed to open " .. filename .. " for writing")
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f:write(string.char(table.unpack(bin)))
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f:close()
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end
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M.writesym = function(filename)
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if not filename then filename = 'main.sym' end
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local f = assert(io.open(filename, "wb"), "failed to open " .. filename .. " for writing")
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table.sort(symbols)
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local ins,fmt,rep = table.insert,string.format,string.rep
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local s ={'--- Symbol List'}
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local sym_rev = {}
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for k,v in pairs(symbols) do if type(v) == 'number' then ins(sym_rev,k) end end
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table.sort(sym_rev, function(a,b) local x,y=symbols[a],symbols[b] return x==y and a<b or x<y end)
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for _,v in ipairs(sym_rev) do local k=symbols[v] ins(s, fmt("%s%s %04x", v, rep(' ',24-#v), k)) end
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s[#s+1] = '--- End of Symbol List.'
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f:write(table.concat(s, '\n'))
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f:close()
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end
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M.getstats = function()
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return 'TODO' -- TODO
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end
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M.location = function(start, finish)
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if type(start) == 'table' then
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for _,v in ipairs(locations) do if v == start then
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M.location_current = start
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return start
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end end
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error("unable to find reference to location [" .. (start.start or '?') .. ", " .. (start.finish or '?') .. "]")
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end
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local size = (finish or math.huge) - start + 1
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local location = { start=start, finish=finish, sections={}, chunks={ { start=start, size=size } } }
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locations[#locations+1] = location
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M.location_current = location
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return location
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end
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M.section = function(t)
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local section = {}
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if (type(t) == 'string') then section.label = t
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else
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assert(type(t) == 'table')
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assert(type(t[1]) == 'string' and string.len(t[1]) > 0)
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section=t section.label=t[1] section[1]=nil
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if section.offset and not section.align then error("section " .. section.label .. " has offset, but no align") end
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end
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table.insert(M.location_current.sections, section)
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if symbols[section.label] then error("duplicate symbol: " .. section.label) end
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symbols[section.label] = section
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M.label_current = section.label
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M.section_current = section
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section.type = 'section'
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section.constraints = {}
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section.instructions = {}
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function section:compute_size()
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local instructions = self.instructions
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self.size=0 self.cycles=0
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for _,instruction in ipairs(instructions) do
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instruction.offset = size
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local ins_sz = instruction.size or 0
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if type(ins_sz) == 'function' then
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-- evaluation is needed to get the size (distinguish zpg/abs)
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-- labels and sections are not resolved at this point, so
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-- evaluation will fail if the size is not explicitly stated (.b/.w);
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-- in that case, assume max size
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ins_sz = ins_sz()
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end
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self.size = self.size + ins_sz
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self.cycles = self.cycles + (instruction.cycles or 0)
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end
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for _,constraint in ipairs(self.constraints) do
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constraint.start = instructions[constraint.from].offset
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constraint.finish = instructions[constraint.to].offset
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end
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end
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return section
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end
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M.label = function(name)
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local label,offset
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local section = M.section_current
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label = { type='label' }
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if name:sub(1,1) == '_' then -- local label
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name = M.label_current .. name
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else
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M.label_current = name
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label.asbin = function() M.label_current = name end
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end
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if symbols[name] then error("duplicate symbol: " .. name) end
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symbols[name] = label
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label.size = function()
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offset = section.size
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label.size = 0
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return 0
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end
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label.resolve = function() return section.org + offset end
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table.insert(section.instructions, label)
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return label
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end
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M.samepage = function()
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local section = M.section_current
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table.insert(section.constraints, { type='samepage', from=#section.instructions+1 })
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end
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M.crosspage = function()
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local section = M.section_current
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table.insert(section.constraints, { type='crosspage', from=#section.instructions+1 })
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end
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M.endpage = function()
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local section = M.section_current
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local constraint = section.constraints[#section.constraints]
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assert(constraint and not constraint.to, "closing constraint, but no constraint is open")
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constraint.to = #section.instructions
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end
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local byte_normalize = function(v)
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if v < -128 or v > 255 then error("value out of byte range: " .. v) end
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if v < 0 then v = v + 0x100 end
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return v & 0xff
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end
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M.byte_normalize = byte_normalize
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local word_normalize = function(v)
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if v < -32768 or v > 65535 then error("value out of word range: " .. v) end
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if v < 0 then v = v + 0x10000 end
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return v & 0xffff
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end
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M.word_normalize = word_normalize
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-- charset([s] [, f])
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-- Set a new charset to be used for next string data in byte().
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-- Without argument, revert to Lua charset.
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-- s: string of all letters of charset
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-- f: letter index offset or function to transform the letter index
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M.charset = function(s, f)
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local st = type(s)
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if st == 'nil' then M.cs = nil return s end
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if st == 'table' then M.cs = s return s end
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if not f then f = function(v) return v end
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elseif type(f) == 'number' then f = function(v) return v + f end end
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local t={}
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for c in s:gmatch'.' do t[c]=f(#t) end
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M.cs=t
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return t
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end
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M.byte_impl = function(args, nrm)
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local data,cs = {},M.cs
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for k,v in ipairs(args) do
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local t = type(v)
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if t == 'number' or t == 'function' then data[#data+1] = v
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elseif t == 'table' then table.move(v,1,#v,#data+1,data)
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elseif t == 'string' then
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if cs then
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for c in v:gmatch'.' do
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local i=cs[c]
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if not i then error("character " .. c .. " is not part of current charset") end
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data[#data+1]=i
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end
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else
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local s = {v:byte(1,#v)}
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table.move(s, 1, #s, #data+1, data)
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end
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else error("unsupported type for byte() argument: " .. t .. ", value: " .. v)
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end
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end
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local asbin = function(b)
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for _,v in ipairs(data) do
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if type(v) == 'function' then v = v() end
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local vt = type(v)
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if vt == 'table' and v.label then v = symbols[v.label]
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elseif vt == 'string' then v = symbols[v] end
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b[#b+1] = nrm(v)
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end
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end
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table.insert(M.section_current.instructions, { data=data, size=#data, asbin=asbin })
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end
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-- byte(...)
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-- Declare bytes to go into the binary stream.
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-- Each argument can be either:
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-- * a number resolving to a valid range byte
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-- * a string, converted to bytes using the charset previously defined,
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-- or Lua's charset if none was defined
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-- * a table, with each entry resolving to a valid range byte
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-- * a function, resolving to exactly one valid range byte, evaluated
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-- after symbols have been resolved
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M.byte = function(...)
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return M.byte_impl({...}, byte_normalize)
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end
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local byte_encapsulate = function(args)
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for k,v in ipairs(args) do
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if type(v) == 'table' and (v.type == 'section' or v.type == 'label') then
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args[k] = function() return symbols[v.label] end
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end
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end
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return args
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end
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M.byte_hi = function(...)
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return M.byte_impl(byte_encapsulate{...}, function(v) return (v>>8)&0xff end)
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end
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M.byte_lo = function(...)
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return M.byte_impl(byte_encapsulate{...}, function(v) return v&0xff end)
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end
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-- word(...)
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-- Declare words to go into the binary stream.
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-- Each argument can be either:
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-- * a section or a label
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-- * a number resolving to a valid range word
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-- * a table, with each entry resolving to a valid range word
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-- * a function, resolving to exactly one valid range word, evaluated
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-- after symbols have been resolved
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M.word = function(...)
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local args = {...}
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local data = {}
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for k,v in ipairs(args) do
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local t = type(v)
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if t == 'number' or t == 'function' then data[#data+1] = v
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elseif t == 'table' then
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if v.type == 'section' or v.type == 'label' then data[#data+1] = function() return symbols[v.label] end
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else table.move(v,1,#v,#data+1,data) end
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else error("unsupported type for word() argument: " .. t .. ", value: " .. v)
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end
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end
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local asbin = function(b)
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for _,v in ipairs(data) do
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if type(v) == 'function' then v = v() end
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local vt = type(v)
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if vt == 'table' and v.label then v = symbols[v.label]
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elseif vt == 'string' then v = symbols[v] end
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v = word_normalize(v)
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b[#b+1] = v&0xff
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b[#b+1] = v>>8
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end
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end
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table.insert(M.section_current.instructions, { data=data, size=#data*2, asbin=asbin })
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end
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local op,cycles_def,xcross_def
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op = function(code, cycles, extra_on_crosspage)
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return { opc=code, cycles=cycles or cycles_def, xcross=extra_on_crosspage or xcross_def }
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end
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local op_eval = function(late, early)
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local x = early or 0
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return type(late) == 'function' and late(x) or x+late
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end
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local op_eval_byte = function(late, early) return byte_normalize(op_eval(late, early)) end
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local op_eval_word = function(late, early) return word_normalize(op_eval(late, early)) end
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cycles_def=2 xcross_def=0 local opimp={
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asl=op(0x0a), brk=op(0x00,7), clc=op(0x18), cld=op(0xd8), cli=op(0x58), clv=op(0xb8), dex=op(0xca), dey=op(0x88),
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inx=op(0xe8), iny=op(0xc8), lsr=op(0x4a), nop=op(0xea), pha=op(0x48,3), php=op(0x08,3), pla=op(0x68,4), plp=op(0x28,4),
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rol=op(0x2a), ror=op(0x6a), rti=op(0x40,6), rts=op(0x60,6), sec=op(0x38), sei=op(0x78), tax=op(0xaa), tay=op(0xa8),
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tsx=op(0xba), txa=op(0x8a), txs=op(0x9a), tya=op(0x98),
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jam=op(0x02,0),
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} M.opimp = opimp
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for k,v in pairs(opimp) do
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M[k .. 'imp'] = function()
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local asbin = function(b) b[#b+1] = v.opc end
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table.insert(M.section_current.instructions, { size=1, cycles=v.cycles, asbin=asbin })
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end
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end
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cycles_def=2 xcross_def=0 local opimm={
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adc=op(0x69), ['and']=op(0x29), cmp=op(0xc9), cpx=op(0xe0), cpy=op(0xc0), eor=op(0x49), lda=op(0xa9), ldx=op(0xa2),
|
|
ldy=op(0xa0), ora=op(0x09), sbc=op(0xe9),
|
|
anc=op(0x0b), ane=op(0x8b), arr=op(0x6b), asr=op(0x4b), jam=op(0x12,0), lax=op(0xab), nop=op(0x80), sbx=op(0xcb),
|
|
} M.opimm = opimm
|
|
for k,v in pairs(opimm) do
|
|
M[k .. 'imm'] = function(late, early)
|
|
local asbin = function(b) b[#b+1]=v.opc b[#b+1]=op_eval_byte(late,early) end
|
|
table.insert(M.section_current.instructions, { size=2, cycles=2, asbin=asbin })
|
|
end
|
|
end
|
|
cycles_def=3 xcross_def=0 local opzpg={
|
|
adc=op(0x65), ['and']=op(0x25), asl=op(0x06,5), bit=op(0x24), cmp=op(0xc5), cpx=op(0xe4), cpy=op(0xc4), dec=op(0xc6,5),
|
|
eor=op(0x45), inc=op(0xe6,5), lda=op(0xa5), ldx=op(0xa6), ldy=op(0xa4), lsr=op(0x46,5), ora=op(0x05), rol=op(0x26,5),
|
|
ror=op(0x66,5), sbc=op(0xe5), sta=op(0x85), stx=op(0x86), sty=op(0x84),
|
|
dcp=op(0xc7,5), isb=op(0xe7,5), jam=op(0x22,0), lax=op(0xa7), nop=op(0x04), rla=op(0x27,5), rra=op(0x67,5), sax=op(0x87),
|
|
slo=op(0x07,5), sre=op(0x47,5),
|
|
} M.opzpg = opzpg
|
|
for k,v in pairs(opzpg) do
|
|
M[k .. 'zpg'] = function(late, early)
|
|
local asbin = function(b) b[#b+1]=v.opc b[#b+1]=op_eval_byte(late,early) end
|
|
table.insert(M.section_current.instructions, { size=2, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
cycles_def=4 xcross_def=0 local opabs={
|
|
adc=op(0x6d), ['and']=op(0x2d), asl=op(0x0e,6), bit=op(0x2c), cmp=op(0xcd), cpx=op(0xec), cpy=op(0xcc), dec=op(0xce,6),
|
|
eor=op(0x4d), inc=op(0xee,6), jmp=op(0x4c,3), jsr=op(0x20,6), lda=op(0xad), ldx=op(0xae), ldy=op(0xac), lsr=op(0x4e,6),
|
|
ora=op(0x0d), rol=op(0x2e,6), ror=op(0x6e,6), sbc=op(0xed), sta=op(0x8d), stx=op(0x8e), sty=op(0x8c),
|
|
dcp=op(0xcf,6), isb=op(0xef,6), jam=op(0x72,0), lax=op(0xaf), nop=op(0x0c), rla=op(0x2f,6), rra=op(0x6f,6), sax=op(0x8f),
|
|
slo=op(0x0f,6), sre=op(0x4f,6),
|
|
} M.opabs = opabs
|
|
for k,v in pairs(opabs) do
|
|
M[k .. 'abs'] = function(late, early)
|
|
local asbin = function(b)
|
|
local x = op_eval_word(late,early)
|
|
b[#b+1]=v.opc b[#b+1]=x&0xff b[#b+1]=x>>8
|
|
end
|
|
table.insert(M.section_current.instructions, { size=3, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
local opzab={} M.opabs = opabs
|
|
for k,_ in pairs(opzpg) do if opabs[k] then opzab[k]=true end end
|
|
for k,_ in pairs(opzab) do
|
|
M[k .. 'zab'] = function(late, early)
|
|
if type(late) ~= 'function' then
|
|
local x = (early or 0) + late
|
|
if x >= -128 and x <= 0xff then return M[k .. 'zpg'](late, early) end
|
|
if x >= -32768 and x <= 0xffff then return M[k .. 'abs'](late, early) end
|
|
error("value out of word range: " .. x)
|
|
end
|
|
local abs = opabs[k]
|
|
local ins = { cycles=abs.cycles }
|
|
ins.size = function()
|
|
local r,x = pcall(late, early or 0)
|
|
if not r then return 3 end
|
|
x = word_normalize(x)
|
|
local zpg = opzpg[k]
|
|
if x <= 0xff and zpg then
|
|
ins.size = 2
|
|
ins.cycles = zpg.cycles
|
|
ins.asbin = function(b) b[#b+1]=zpg.opc b[#b+1]=x end
|
|
return 2
|
|
end
|
|
ins.size = 3
|
|
ins.asbin = function(b) b[#b+1]=abs.opc b[#b+1]=x&0xff b[#b+1]=x>>8 end
|
|
return 3
|
|
end
|
|
ins.asbin = function(b)
|
|
local x = word_normalize(late(early or 0))
|
|
-- since we assumed absolute on link phase, we must generate absolute in binary
|
|
if x <= 0xff and opzpg[k] then print("warning: forcing abs on zpg operand for opcode " .. k) end
|
|
b[#b+1]=abs.opc b[#b+1]=x&0xff b[#b+1]=x>>8
|
|
end
|
|
table.insert(M.section_current.instructions, ins)
|
|
end
|
|
end
|
|
cycles_def=4 xcross_def=0 local opzpx={
|
|
adc=op(0x75), ['and']=op(0x35), asl=op(0x16,6), cmp=op(0xd5), dec=op(0xd6,6), eor=op(0x55), inc=op(0xf6,6), lda=op(0xb5),
|
|
ldy=op(0xb4), lsr=op(0x56,6), ora=op(0x15), rol=op(0x36,6), ror=op(0x76,6), sbc=op(0xf5), sta=op(0x95), sty=op(0x94),
|
|
dcp=op(0xd7,6), isb=op(0xf7,6), jam=op(0x32,0), nop=op(0x14), rla=op(0x37,6), rra=op(0x77,6), slo=op(0x17,6), sre=op(0x57,6),
|
|
} M.opzpx = opzpx
|
|
for k,v in pairs(opzpx) do
|
|
M[k .. 'zpx'] = function(late, early)
|
|
local asbin = function(b) b[#b+1]=v.opc b[#b+1]=op_eval_byte(late,early) end
|
|
table.insert(M.section_current.instructions, { size=2, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
cycles_def=4 xcross_def=1 local opabx={
|
|
adc=op(0x7d), ['and']=op(0x3d), asl=op(0x1e,7,0), cmp=op(0xdd), dec=op(0xde,7,0), eor=op(0x5d), inc=op(0xfe,7,0), lda=op(0xbd),
|
|
ldy=op(0xbc), lsr=op(0x5e,7,0), ora=op(0x1d), rol=op(0x3e,7,0), ror=op(0x7e,7,0), sbc=op(0xfd), sta=op(0x9d,5,0),
|
|
dcp=op(0xdf,7,0), isb=op(0xff,7,0), jam=op(0x92,0,0), nop=op(0x1c), rla=op(0x3f,7,0), rra=op(0x7f,7,0), shy=op(0x9c,5,0), slo=op(0x1f,7,0),
|
|
sre=op(0x5f,7,0),
|
|
} M.opabx = opabx
|
|
for k,v in pairs(opabx) do
|
|
M[k .. 'abx'] = function(late, early)
|
|
local asbin = function(b)
|
|
local x = op_eval_word(late,early)
|
|
b[#b+1]=v.opc b[#b+1]=x&0xff b[#b+1]=x>>8
|
|
end
|
|
table.insert(M.section_current.instructions, { size=3, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
local opzax={} M.opabx = opabx
|
|
for k,_ in pairs(opzpx) do if opabx[k] then opzax[k]=true end end
|
|
for k,_ in pairs(opzax) do
|
|
M[k .. 'zax'] = function(late, early)
|
|
if type(late) ~= 'function' then
|
|
local x = (early or 0) + late
|
|
if x >= -128 and x <= 0xff then return M[k .. 'zpx'](late, early) end
|
|
if x >= -32768 and x <= 0xffff then return M[k .. 'abx'](late, early) end
|
|
error("value out of word range: " .. x)
|
|
end
|
|
local abx = opabx[k]
|
|
local ins = { cycles=abx.cycles }
|
|
ins.size = function()
|
|
local r,x = pcall(late, early or 0)
|
|
if not r then return 3 end
|
|
x = word_normalize(x)
|
|
local zpx = opzpx[k]
|
|
if x <= 0xff and zpx then
|
|
ins.size = 2
|
|
ins.cycles = zpx.cycles
|
|
ins.asbin = function(b) b[#b+1]=zpx.opc b[#b+1]=x end
|
|
return 2
|
|
end
|
|
ins.size = 3
|
|
ins.asbin = function(b) b[#b+1]=abx.opc b[#b+1]=x&0xff b[#b+1]=x>>8 end
|
|
return 3
|
|
end
|
|
ins.asbin = function(b)
|
|
local x = word_normalize(late(early or 0))
|
|
-- since we assumed absolute on link phase, we must generate absolute in binary
|
|
if x <= 0xff and opzpx[k] then print("warning: forcing abx on zpx operand for opcode " .. k) end
|
|
b[#b+1]=abx.opc b[#b+1]=x&0xff b[#b+1]=x>>8
|
|
end
|
|
table.insert(M.section_current.instructions, ins)
|
|
end
|
|
end
|
|
cycles_def=4 xcross_def=0 local opzpy={
|
|
ldx=op(0xb6), stx=op(0x96),
|
|
jam=op(0x42,0), lax=op(0xb7), sax=op(0x97),
|
|
} M.opzpy = opzpy
|
|
for k,v in pairs(opzpy) do
|
|
M[k .. 'zpy'] = function(late, early)
|
|
local asbin = function(b) b[#b+1]=v.opc b[#b+1]=op_eval_byte(late,early) end
|
|
table.insert(M.section_current.instructions, { size=2, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
cycles_def=4 xcross_def=1 local opaby={
|
|
adc=op(0x79), ['and']=op(0x39), cmp=op(0xd9), eor=op(0x59), lda=op(0xb9), ldx=op(0xbe), ora=op(0x19), sbc=op(0xf9),
|
|
sta=op(0x99,5,0),
|
|
dcp=op(0xdb,7,0), isb=op(0xfb,7,0), jam=op(0xb2,0,0), las=op(0xbb), lax=op(0xbf), rla=op(0x3b,7,0), rra=op(0x7b,7,0), sha=op(0x9f,5,0),
|
|
shs=op(0x9b,5,0), shx=op(0x9e,5,0), slo=op(0x1b,7,0), sre=op(0x5b,7,0),
|
|
} M.opaby = opaby
|
|
for k,v in pairs(opaby) do
|
|
M[k .. 'aby'] = function(late, early)
|
|
local asbin = function(b)
|
|
local x = op_eval_word(late,early)
|
|
b[#b+1]=v.opc b[#b+1]=x&0xff b[#b+1]=x>>8
|
|
end
|
|
table.insert(M.section_current.instructions, { size=3, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
local opzay={} M.opaby = opaby
|
|
for k,_ in pairs(opzpy) do if opaby[k] then opzay[k]=true end end
|
|
for k,_ in pairs(opzay) do
|
|
M[k .. 'zay'] = function(late, early)
|
|
if type(late) ~= 'function' then
|
|
local x = (early or 0) + late
|
|
if x >= -128 and x <= 0xff then return M[k .. 'zpy'](late, early) end
|
|
if x >= -32768 and x <= 0xffff then return M[k .. 'aby'](late, early) end
|
|
error("value out of word range: " .. x)
|
|
end
|
|
local aby = opaby[k]
|
|
local ins = { cycles=aby.cycles }
|
|
ins.size = function()
|
|
local r,x = pcall(late, early or 0)
|
|
if not r then return 3 end
|
|
x = word_normalize(x)
|
|
local zpy = opzpy[k]
|
|
if x <= 0xff and zpy then
|
|
ins.size = 2
|
|
ins.cycles = zpy.cycles
|
|
ins.asbin = function(b) b[#b+1]=zpy.opc b[#b+1]=x end
|
|
return 2
|
|
end
|
|
ins.size = 3
|
|
ins.asbin = function(b) b[#b+1]=aby.opc b[#b+1]=x&0xff b[#b+1]=x>>8 end
|
|
return 3
|
|
end
|
|
ins.asbin = function(b)
|
|
local x = word_normalize(late(early or 0))
|
|
-- since we assumed absolute on link phase, we must generate absolute in binary
|
|
if x <= 0xff and opzpy[k] then print("warning: forcing aby on zpy operand for opcode " .. k) end
|
|
b[#b+1]=aby.opc b[#b+1]=x&0xff b[#b+1]=x>>8
|
|
end
|
|
table.insert(M.section_current.instructions, ins)
|
|
end
|
|
end
|
|
cycles_def=2 xcross_def=0 local oprel={
|
|
bcc=op(0x90), bcs=op(0xb0), beq=op(0xf0), bmi=op(0x30), bne=op(0xd0), bpl=op(0x10), bvc=op(0x50), bvs=op(0x70),
|
|
} M.oprel = oprel
|
|
for k,v in pairs(oprel) do
|
|
M[k .. 'rel'] = function(label)
|
|
local parent,offset = M.label_current
|
|
local section = M.section_current
|
|
local op = { cycles=2 }
|
|
op.size = function()
|
|
offset = section.size
|
|
op.size=2
|
|
return 2
|
|
end
|
|
op.asbin = function(b)
|
|
local x,l = label,label
|
|
if type(x) == 'function' then x=x() end
|
|
if type(x) == 'string' then
|
|
if x:sub(1,1) == '_' then x=parent..x l=x end
|
|
x = symbols[x]
|
|
end
|
|
if type(x) ~= 'number' then error("unresolved branch target: " .. tostring(x)) end
|
|
x = x - offset - section.org
|
|
if x < -128 or x > 127 then error("branch target out of range for " .. l .. ": " .. x) end
|
|
b[#b+1]=v.opc b[#b+1]=x&0xff
|
|
end
|
|
table.insert(M.section_current.instructions, op)
|
|
end
|
|
end
|
|
cycles_def=5 xcross_def=0 local opind={
|
|
jmp=op(0x6c),
|
|
jam=op(0xd2,0),
|
|
} M.opind = opind
|
|
for k,v in pairs(opind) do
|
|
M[k .. 'ind'] = function(late, early)
|
|
local asbin = function(b)
|
|
local x = op_eval_word(late,early)
|
|
b[#b+1]=v.opc b[#b+1]=x&0xff b[#b+1]=x>>8
|
|
end
|
|
table.insert(M.section_current.instructions, { size=3, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
cycles_def=6 xcross_def=0 local opinx={
|
|
adc=op(0x61), ['and']=op(0x21), cmp=op(0xc1), eor=op(0x41), lda=op(0xa1), ora=op(0x01), sbc=op(0xe1), sta=op(0x81),
|
|
dcp=op(0xc3,8), isb=op(0xe3,8), jam=op(0x52,0), lax=op(0xa3), rla=op(0x23,8), rra=op(0x63,8), sax=op(0x83), slo=op(0x03,8),
|
|
sre=op(0x43,8),
|
|
} M.opinx = opinx
|
|
for k,v in pairs(opinx) do
|
|
M[k .. 'inx'] = function(late, early)
|
|
local asbin = function(b) b[#b+1]=v.opc b[#b+1]=op_eval_byte(late,early) end
|
|
table.insert(M.section_current.instructions, { size=2, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
cycles_def=5 xcross_def=1 local opiny={
|
|
adc=op(0x71), ['and']=op(0x31), cmp=op(0xd1), eor=op(0x51), lda=op(0xb1), ora=op(0x11), sbc=op(0xf1), sta=op(0x91,6),
|
|
dcp=op(0xd3,8), isb=op(0xf3,8), jam=op(0x62,0,0), lax=op(0xb3), rla=op(0x33,8), rra=op(0x73,8), sha=op(0x93,6), slo=op(0x13,8),
|
|
sre=op(0x53,8),
|
|
}
|
|
for k,v in pairs(opiny) do
|
|
M[k .. 'iny'] = function(late, early)
|
|
local asbin = function(b) b[#b+1]=v.opc b[#b+1]=op_eval_byte(late,early) end
|
|
table.insert(M.section_current.instructions, { size=2, cycles=v.cycles, asbin=asbin })
|
|
end
|
|
end
|
|
|
|
return M
|