678 lines
24 KiB
Lua
678 lines
24 KiB
Lua
require('constants')
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require('stdlib/table')
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local Entity = require('stdlib/entity/entity')
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-- Split a string in to tokens using whitespace as a seperator.
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local function split( str )
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local result = {}
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for sub in string.gmatch( str, "%S+" ) do
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table.insert( result, sub )
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end
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return result
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end
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-- Parse tokens in to an AST we can store and evaluate later.
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local function parse( tokens )
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if #tokens == 0 then
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return OP_NOP
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end
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local c = 1
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local parseExpr
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local peek = function() return tokens[c] end
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local consume = function()
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local result = peek()
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c = c + 1
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return result
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end
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local parseNum = function()
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return { val = tonumber(consume()), type = 'num' }
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end
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local parseOp = function()
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local node = { val = consume(), type = 'op', expr = {} }
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while(peek()) do
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local expr = parseExpr()
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if expr then
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table.insert( node.expr, expr )
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else
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break
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end
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end
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return node
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end
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local parseAddress = function(name)
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local token = consume()
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if string.find(token, "@%d") then
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local addr = string.gsub(token, name.."@(%d+)", "%1")
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return {val = tonumber(addr), pointer = true}
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else
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local index = string.gsub(token, name.."(%d+)", "%1")
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return {val = tonumber(index), pointer = false}
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end
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end
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local parseWire = function(name)
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local address = parseAddress(name)
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return { type = "wire", color = name, val = address.val, pointer = address.pointer}
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end
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local parseRegister = function(name)
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local address = parseAddress(name)
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return { type = "register", location = name, val = address.val, pointer = address.pointer }
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end
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local parseReadOnlyRegister = function( name, index )
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consume()
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return { type = "register", location = "mem", val = tonumber(index) }
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end
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local parseOutput = function(name)
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consume()
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return { type = "register", location = "out" }
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end
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local parseLabel = function()
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local label = consume()
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return { type = "label", label = label }
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end
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parseExpr = function()
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if peek() then
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if string.sub(peek(), 1, 1) == "#" then
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return OP_NOP
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elseif string.sub(peek(), 1, 1) == ":" then
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return parseLabel()
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elseif string.find( peek(), "%d" ) == 1 then
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return parseNum()
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elseif string.find(peek(), "red") then
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return parseWire("red")
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elseif string.find(peek(), "green") then
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return parseWire("green")
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elseif string.find(peek(), "mem") then
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return parseRegister("mem")
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elseif string.find(peek(), "out") then
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return parseOutput("out")
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elseif string.find(peek(), "ipt") then
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return parseReadOnlyRegister("ipt", 5)
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elseif string.find(peek(), "cnr") then
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return parseReadOnlyRegister("cnr", 6)
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elseif string.find(peek(), "cng") then
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return parseReadOnlyRegister("cng", 7)
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elseif string.find(peek(), "clk") then
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return parseReadOnlyRegister("clk", 8)
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else
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return parseOp()
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end
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end
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end
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return parseExpr()
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end
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--- Throws an exception, the exception has a control character prepended to that
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--- we can substring the message to only display the error message and not the stack-trace
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--- to the user.
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local function exception( val )
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error("@"..val, 2)
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end
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--- Evaluates an AST.
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local function eval( ast, control, memory, modules, program_counter, clock )
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local wires = {}
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wires.red = control.get_circuit_network(defines.wire_type.red, defines.circuit_connector_id.combinator_input)
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wires.green = control.get_circuit_network(defines.wire_type.green, defines.circuit_connector_id.combinator_input)
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local node, num
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-- Assertion Helper Functions
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local assert_inout = function( _ )
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if #_ ~= 2 then
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exception("Expecting two parameters after opcode")
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end
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end
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local assert_in = function( _ )
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if #_ ~= 1 then
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exception("Expecting one parameter after opcode")
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end
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end
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local assert_in_register = function( _ )
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if _.type ~= "register" then
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exception("Expecting 1st parameter to be a memory or output register")
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end
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end
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local assert_in_mem = function( _ )
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if _.type ~= "register" or _.location ~= "mem" then
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exception("Expecting 1st parameter to be a memory register")
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end
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end
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local assert_in_register_or_wire = function( _ )
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if not (_.type == "register" or _.type == "wire") then
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exception("Expecting 1st parameter to be a register or wire input")
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end
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end
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local assert_in_mem_or_val = function( _ )
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if not ((_.type == "register" and _.location == "mem") or _.type == "num") then
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exception("Expecting 1st parameter to be an integer or memory register")
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end
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end
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local assert_in_mem_or_val_or_label = function( _ )
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if not ((_.type == "register" and _.location == "mem") or _.type == "num" or _.type == "label") then
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exception("Expecting 1st parameter to be an integer, memory register or label")
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end
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end
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local assert_in_wire = function( _ )
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if _.type ~= "wire" then
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exception("Expecting 1st parameter to be a wire input")
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end
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end
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local assert_out_mem = function( _ )
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if _.type ~= "register" or _.location ~= "mem" then
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exception("Expecting 2nd parameter to be a memory register")
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end
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end
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local assert_out_register = function( _ )
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if _.type ~= "register" then
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exception("Expecting 2nd parameter to be a memory or output register")
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end
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end
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local assert_out_mem_or_val = function( _ )
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if not ((_.type == "register" and _.location == "mem") or _.type == "num") then
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exception("Expecting 2nd parameter to be an integer or memory register")
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end
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end
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local assert_memory_index_range = function( index, max )
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if index == nil then
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exception("No register address specified.")
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end
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if index < 1 or index > max then
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exception("Invalid memory address: "..index..". Out of range.")
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end
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end
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-- Memory Register Helper Functions
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-- Read only registers
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local getmem, setmem
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local function readOnlyRegister( index )
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if index == 5 then
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return program_counter
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elseif index == 6 then
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if wires.red and wires.red.signals then
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return #wires.red.signals
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else
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return 0
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end
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elseif index == 7 then
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if wires.green and wires.green.signals then
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return #wires.green.signals
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else
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return 0
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end
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elseif index == 8 then
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return clock
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end
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end
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local memindex = function( _ )
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if _.pointer then
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--assert_memory_index_range(_.val, 8)
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return getmem(_, true).count
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else
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return _.val
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end
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end
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getmem = function( index_expr, ignore_pointer )
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local index
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if not ignore_pointer then
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index = memindex(index_expr)
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else
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index = index_expr.val
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end
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if index > 10 and index < 45 then
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local direction = math.floor(index / 10)
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local module_index = index - (direction * 10)
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assert_memory_index_range(module_index, 4)
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local module = modules[direction]
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if module then
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if module.name == "microcontroller-ram" then
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return table.deepcopy(module.get_control_behavior().get_signal(module_index))
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elseif module.name == "microcontroller" then
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return table.deepcopy(Entity.get_data(module).memory[module_index])
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end
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else
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exception("Module "..direction.." not found.")
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end
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elseif index > 4 then
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assert_memory_index_range(index, 8)
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local result = table.deepcopy(NULL_SIGNAL)
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result.count = readOnlyRegister(index)
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return result
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else
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assert_memory_index_range(index, 4)
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return table.deepcopy(memory[index])
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end
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end
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setmem = function( index_expr, value )
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local index = memindex(index_expr)
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local signal = table.deepcopy(value)
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if index > 10 and index < 45 then
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local direction = math.floor(index / 10)
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local module_index = index - (direction * 10)
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assert_memory_index_range(module_index, 4)
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local module = modules[direction]
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if module then
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if module.name == "microcontroller-ram" then
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module.get_control_behavior().set_signal(module_index, signal)
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elseif module.name == "microcontroller" then
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local other_mc_state = Entity.get_data(module)
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other_mc_state.memory[module_index] = signal
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end
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else
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exception("Module "..direction.." not found.")
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end
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else
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assert_memory_index_range(index, 4)
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memory[index] = signal
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end
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end
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local setmem_count = function( index_expr, count )
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local value = getmem(index_expr)
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value.count = count
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setmem(index_expr, value)
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end
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-- Output Register Helper Functions
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local getout = function()
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local signalID = control.parameters.parameters.output_signal
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local value = control.parameters.parameters.first_constant
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return {signal = signalID, count = value}
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end
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local setout = function( value )
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local params = control.parameters
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params.parameters.first_constant = value.count
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params.parameters.output_signal = value.signal
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control.parameters = params
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end
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local setout_count = function( count )
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local params = control.parameters
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params.parameters.first_constant = count
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control.parameters = params
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end
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-- Multiplex Helper Functions
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local function getregister( index_expr )
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if index_expr.location == 'mem' then
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return getmem(index_expr)
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elseif index_expr.location == 'out' then
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return getout()
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end
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end
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local function setregister( index_expr, value )
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if index_expr.location == 'mem' then
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setmem(index_expr, value)
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elseif index_expr.location == 'out' then
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setout(value)
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end
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end
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local function setregister_count( index_expr, count )
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if index_expr.location == 'mem' then
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setmem_count(index_expr, count)
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elseif index_expr.location == 'out' then
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setout_count(count)
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end
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end
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local function const_num( number )
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return {type = "num", val = number}
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end
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local function memcount_or_val( _ )
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if _.type == 'num' then
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return num(_)
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elseif _.type == 'register' and _.location == 'mem' then
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return getmem(_).count
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end
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end
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-- Wire Helper Functions
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local function getwire( _ )
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local index = memindex(_)
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if not wires[_.color] then
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exception("Tried to access ".._.color.." wire when input not present.")
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end
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if wires[_.color].signals then
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return wires[_.color].signals[index] or NULL_SIGNAL
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end
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return NULL_SIGNAL
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end
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local function find_signal_in_wire( wire, signal_to_find )
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if signal_to_find and wire.signals then
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for index, wire_signal in pairs(wire.signals) do
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if wire_signal and wire_signal.signal.name == signal_to_find.signal.name then
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return wire.signals[index]
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end
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end
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end
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return NULL_SIGNAL
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end
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-- Setup Helper Functions
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local standard_op = function( _ )
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assert_inout(_)
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local _in = _[1]
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assert_in_mem_or_val(_in)
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local _out = _[2]
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assert_out_mem_or_val(_out)
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return _in, _out
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end
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local test_op = function( _ )
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assert_inout(_)
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local _in = _[1]
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assert_in_mem_or_val(_in)
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local _out = _[2]
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assert_out_mem_or_val(_out)
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return _in, _out
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end
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--------------------
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-- OPCODE Functions
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--------------------
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local ops = {
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-- W = wire
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-- I = integer constant
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-- M = memory register
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-- O = output register
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-- R = Register (memory or output)
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-- + = zero, one or more parameters
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nop = function(_)
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end,
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mov = function(_) -- MOV W/R R -- Move
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local _in = _[1]
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assert_in_register_or_wire(_in)
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local out_val = nil
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if _in.type == 'wire' then
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out_val = getwire(_in)
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elseif _in.type == 'register' then
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out_val = getregister(_in)
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end
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if #_ > 2 then
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for i = 2, #_ do
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assert_out_register(_[i])
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setregister(_[i], out_val)
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end
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else
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local _out = _[2]
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assert_out_register(_out)
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setregister(_out, out_val)
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end
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end,
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set = function(_) -- SET M/I R -- Set Count
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assert_inout(_)
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local _in = _[1]
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assert_in_mem_or_val(_in)
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local _out = _[2]
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assert_out_register(_out)
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if _in.type == 'register' then
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setregister_count(_out, getregister(_in).count)
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elseif _in.type == 'num' then
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setregister_count(_out, num(_in))
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end
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end,
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clr = function(_) -- CLR R+ -- Clear
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if #_ > 0 then
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for i, expr in ipairs(_) do
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setregister(_[i], NULL_SIGNAL)
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end
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else
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for i = 1, #memory do
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memory[i] = NULL_SIGNAL
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end
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for i = 1, 4 do
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if modules[i] then
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for k = 1, 4 do
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setmem(const_num(i*10 + k, NULL_SIGNAL))
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end
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end
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end
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setout(NULL_SIGNAL)
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end
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end,
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fir = function(_) -- FIR R -- Find (from) Red
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assert_in(_)
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local _in = _[1]
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assert_in_register(_in)
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local signal = getregister(_in)
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local wire_signal = find_signal_in_wire(wires.red, signal)
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setmem(const_num(1), wire_signal)
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end,
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fig = function(_) -- FIG R -- Find (from) Green
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assert_in(_)
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local _in = _[1]
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assert_in_register(_in)
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local signal = getregister(_in)
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local wire_signal = find_signal_in_wire(wires.green, signal)
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setmem(const_num(1), wire_signal)
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end,
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swp = function(_) -- SWP R R -- Swap
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assert_inout(_)
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local _in = _[1]
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assert_in_register(_in)
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local _out = _[2]
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assert_out_register(_out)
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local inSignal = getregister(_in)
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local outSignal = getregister(_out)
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setregister(_in, outSignal)
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setregister(_out, inSignal)
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end,
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syn = function(_) -- SYN
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return {type = "sync"}
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end,
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add = function(_) -- ADD M/I M/I -- Add
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local _in, _out = standard_op(_)
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setmem_count(const_num(1), memcount_or_val(_in) + memcount_or_val(_out))
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end,
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sub = function(_) -- SUB M/I M/I -- Subtract
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local _in, _out = standard_op(_)
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setmem_count(const_num(1), memcount_or_val(_in) - memcount_or_val(_out))
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end,
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mul = function(_) -- MUL M/I M/I -- Multiply
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local _in, _out = standard_op(_)
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setmem_count(const_num(1), memcount_or_val(_in) * memcount_or_val(_out))
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end,
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div = function(_) -- DIV M/I M/I -- Divide
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local _in, _out = standard_op(_)
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setmem_count(const_num(1), memcount_or_val(_in) / memcount_or_val(_out))
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end,
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mod = function(_) -- MOD M/I M/I -- Modulo
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local _in, _out = standard_op(_)
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setmem_count(const_num(1), memcount_or_val(_in) % memcount_or_val(_out))
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end,
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pow = function(_) -- POW M/I M/I -- Exponetiation
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local _in, _out = standard_op(_)
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setmem_count(const_num(1), memcount_or_val(_in) ^ memcount_or_val(_out))
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end,
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bnd = function(_) -- BND M/I M/I -- Bitwise AND
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local _in, _out = standard_op(_)
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local result = bit32.band(memcount_or_val(_in), memcount_or_val(_out))
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setmem_count(const_num(1), result)
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end,
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bor = function(_) -- BOR M/I M/I -- Bitwise OR
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local _in, _out = standard_op(_)
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local result = bit32.bor(memcount_or_val(_in), memcount_or_val(_out))
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setmem_count(const_num(1), result)
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end,
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bxr = function(_) -- BXR M/I M/I -- Bitwise XOR
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local _in, _out = standard_op(_)
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local result = bit32.bxor(memcount_or_val(_in), memcount_or_val(_out))
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setmem_count(const_num(1), result)
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end,
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bls = function(_) -- BLS M/I M/I -- Bitwise left shift
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local _in, _out = standard_op(_)
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local result = bit32.lshift(memcount_or_val(_in), memcount_or_val(_out))
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setmem_count(const_num(1), result)
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end,
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brs = function(_) -- BRS M/I M/I -- Bitwise right shift
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local _in, _out = standard_op(_)
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local result = bit32.rshift(memcount_or_val(_in), memcount_or_val(_out))
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setmem_count(const_num(1), result)
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end,
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blr = function(_) -- BLR M/I M/I -- Bitwise left rotate
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local _in, _out = standard_op(_)
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local result = bit32.lrotate(memcount_or_val(_in), memcount_or_val(_out))
|
|
setmem_count(const_num(1), result)
|
|
end,
|
|
brr = function(_) -- BRR M/I M/I -- Bitwise right rotate
|
|
local _in, _out = standard_op(_)
|
|
local result = bit32.rrotate(memcount_or_val(_in), memcount_or_val(_out))
|
|
setmem_count(const_num(1), result)
|
|
end,
|
|
bno = function(_) -- BNO M/I M/I -- Bitwise NOT
|
|
assert_in(_)
|
|
local _in = _[1]
|
|
assert_in_mem_or_val(_in)
|
|
local result = bit32.bnot(memcount_or_val(_in))
|
|
setmem_count(const_num(1), result)
|
|
end,
|
|
slp = function(_) -- SLP M/I -- Sleep
|
|
assert_in(_)
|
|
local _in = _[1]
|
|
assert_in_mem_or_val(_in)
|
|
return { type = "sleep", val = memcount_or_val(_in) }
|
|
end,
|
|
jmp = function(_) -- JMP M/I/L -- Jump
|
|
assert_in(_)
|
|
local _in = _[1]
|
|
assert_in_mem_or_val_or_label(_in)
|
|
if _in.type == 'label' then
|
|
return { type = "jump", label = _in.label }
|
|
else
|
|
return { type = "jump", val = memcount_or_val(_in) }
|
|
end
|
|
end,
|
|
hlt = function(_) -- HLT -- Halt
|
|
return { type = "halt" }
|
|
end,
|
|
tgt = function(_) -- TGT M/I M/I -- Test Greater Than
|
|
local _in, _out = test_op(_)
|
|
if memcount_or_val(_in) > memcount_or_val(_out) then
|
|
return { type = "skip" }
|
|
end
|
|
end,
|
|
tlt = function(_) -- TLT M/I M/I -- Test Less Than
|
|
local _in, _out = test_op(_)
|
|
if memcount_or_val(_in) < memcount_or_val(_out) then
|
|
return { type = "skip" }
|
|
end
|
|
end,
|
|
teq = function(_) -- TEQ M/I M/I -- Test Equal (Signal count)
|
|
local _in, _out = test_op(_)
|
|
if memcount_or_val(_in) == memcount_or_val(_out) then
|
|
return { type = "skip" }
|
|
end
|
|
end,
|
|
tnq = function(_) -- TNG M/I M/I -- Test Not Equal (Signal count)
|
|
local _in, _out = test_op(_)
|
|
if memcount_or_val(_in) ~= memcount_or_val(_out) then
|
|
return { type = "skip" }
|
|
end
|
|
end,
|
|
tte = function(_) -- TTE M M -- Test Equal (Signal type)
|
|
assert_inout(_)
|
|
local _in = _[1]
|
|
assert_in_mem(_in)
|
|
local _out = _[2]
|
|
assert_out_mem(_out)
|
|
if getmem(_in).signal.name == getmem(_out).signal.name then
|
|
return { type = "skip" }
|
|
end
|
|
end,
|
|
ttn = function(_) -- TTN M M -- Test Not Equal (Signal type)
|
|
assert_inout(_)
|
|
local _in = _[1]
|
|
assert_in_mem(_in)
|
|
local _out = _[2]
|
|
assert_out_mem(_out)
|
|
if getmem(_in).signal.name ~= getmem(_out).signal.name then
|
|
return { type = "skip" }
|
|
end
|
|
end,
|
|
dig = function(_) -- DIG M/I -- Get Digit (from memory1)
|
|
assert_in(_)
|
|
local _in = _[1]
|
|
assert_in_mem_or_val(_in)
|
|
local i = memcount_or_val(_in)
|
|
local value = getmem(const_num(1)).count
|
|
local digit = tonumber(string.sub(tostring(value), -i, -i))
|
|
setmem_count(const_num(1), digit)
|
|
end,
|
|
dis = function(_) -- DIS M/I M/I -- Set Digit (in memory1)
|
|
assert_inout(_)
|
|
local _in = _[1]
|
|
assert_in_mem_or_val(_in)
|
|
local _out = _[2]
|
|
assert_out_mem_or_val(_out)
|
|
local str_value = tostring(getmem(const_num(1)).count)
|
|
local selector = string.len(str_value) - memcount_or_val(_in) + 1
|
|
local digit = memcount_or_val(_out)
|
|
local p1 = string.sub(str_value, 1, selector-1)
|
|
local p2 = string.sub(str_value, selector, selector)
|
|
local p3 = string.sub(str_value, selector+1, -1)
|
|
p2 = string.sub(tostring(digit), -1)
|
|
setmem_count(const_num(1), tonumber(p1..p2..p3))
|
|
end,
|
|
bkr = function(_) -- BKR M/I -- Block until there are at least [a] red signals.
|
|
assert_in(_)
|
|
local _in = _[1]
|
|
assert_in_mem_or_val(_in)
|
|
local count = memcount_or_val(_in)
|
|
if wires.red.signals == nil or #wires.red.signals < count then
|
|
return {type = "block"}
|
|
end
|
|
end,
|
|
bkg = function(_) -- BKG M/I -- Block until there are at least [a] green signals.
|
|
assert_in(_)
|
|
local _in = _[1]
|
|
assert_in_mem_or_val(_in)
|
|
local count = memcount_or_val(_in)
|
|
if wires.green.signals == nil or #wires.green.signals < count then
|
|
return {type = "block"}
|
|
end
|
|
end,
|
|
}
|
|
|
|
-- TODO: Tidy this up, we've got functions being declared in two different ways here
|
|
-- and also some before the op codes and some after.
|
|
num = function( _ )
|
|
return _.val
|
|
end
|
|
node = function( _ )
|
|
if _.type == 'num' then
|
|
return num(_)
|
|
elseif _.type == 'op' then
|
|
if not ops[_.val] then
|
|
exception("Unknown opcode: ".._.val)
|
|
else
|
|
return ops[_.val](_.expr)
|
|
end
|
|
elseif _.type == 'nop' or _.type == 'label' then
|
|
-- do nothing
|
|
else
|
|
exception("Unable to parse code")
|
|
end
|
|
end
|
|
|
|
if ast then
|
|
local result = node(ast)
|
|
if type(result) == "number" then
|
|
exception("Expected an opcode but instead read an integer.")
|
|
end
|
|
return result
|
|
end
|
|
end
|
|
|
|
local compiler = {}
|
|
|
|
function compiler.compile( lines )
|
|
local ast = {}
|
|
for i, line in ipairs(lines) do
|
|
ast[i] = parse(split(line))
|
|
end
|
|
return ast
|
|
end
|
|
|
|
function compiler.eval( ast, control, state )
|
|
local status, results = pcall(eval, ast, control, state.memory, state.adjacent_modules, state.program_counter, state.clock)
|
|
if not status then
|
|
local start_index = string.find(results, "@") or 1
|
|
results = string.sub(results, start_index+1, -1)
|
|
end
|
|
return status, results
|
|
end
|
|
|
|
return compiler |