+# Threading Primitives (inner interpreter)
+
+NEXT = defPrim(() -> begin
+ reg.W = mem[reg.IP]
+ reg.IP += 1
+ return mem[reg.W]
+end, name="NEXT")
+
+DOCOL = defPrim(() -> begin
+ pushRS(reg.IP)
+ reg.IP = reg.W + 1
+ return NEXT
+end, name="DOCOL")
+
+DOVAR = defPrim(() -> begin
+ pushPS(reg.W + 1)
+ return NEXT
+end, name="DOVAR")
+
+DOCON = defPrim(() -> begin
+ pushPS(mem[reg.W + 1])
+ return NEXT
+end, name="DOVAR")
+
+EXIT = defPrimWord("EXIT", () -> begin
+ reg.IP = popRS()
+ return NEXT
+end)
+
+# Dictionary entries for core built-in variables, constants
+
+HERE_CFA = defExistingVar("HERE", HERE)
+LATEST_CFA = defExistingVar("LATEST", LATEST)
+PSP0_CFA = defExistingVar("PSP0", PSP0)
+RSP0_CFA = defExistingVar("RSP0", RSP0)
+
+defConst("DOCOL", DOCOL)
+defConst("DOCON", DOCON)
+defConst("DOVAR", DOVAR)
+
+defConst("DICT", DICT)
+defConst("MEMSIZE", size_mem)
+
+F_IMMED_CFA = defConst("F_IMMED", F_IMMED)
+F_HIDDEN_CFA = defConst("F_HIDDEN", F_HIDDEN)
+F_LENMASK_CFA = defConst("F_LENMASK", F_LENMASK)
+
+# Basic forth primitives
+
+DROP = defPrimWord("DROP", () -> begin
+ popPS()
+ return NEXT
+end)
+
+SWAP = defPrimWord("SWAP", () -> begin
+ a = popPS()
+ b = popPS()
+ pushPS(a)
+ pushPS(b)
+ return NEXT
+end)
+
+DUP = defPrimWord("DUP", () -> begin
+ ensurePSDepth(1)
+ pushPS(mem[reg.PSP])
+ return NEXT
+end)
+
+OVER = defPrimWord("OVER", () -> begin
+ ensurePSDepth(2)
+ pushPS(mem[reg.PSP-1])
+ return NEXT
+end)
+
+ROT = defPrimWord("ROT", () -> begin
+ a = popPS()
+ b = popPS()
+ c = popPS()
+ pushPS(b)
+ pushPS(a)
+ pushPS(c)
+ return NEXT
+end)
+
+NROT = defPrimWord("-ROT", () -> begin
+ a = popPS()
+ b = popPS()
+ c = popPS()
+ pushPS(a)
+ pushPS(c)
+ pushPS(b)
+ return NEXT
+end)
+
+
+TWODROP = defPrimWord("2DROP", () -> begin
+ popPS()
+ popPS()
+ return NEXT
+end)
+
+TWODUP = defPrimWord("2DUP", () -> begin
+ ensurePSDepth(2)
+ a = mem[reg.PSP-1]
+ b = mem[reg.PSP]
+ pushPS(a)
+ pushPS(b)
+ return NEXT
+end)
+
+TWOSWAP = defPrimWord("2SWAP", () -> begin
+ a = popPS()
+ b = popPS()
+ c = popPS()
+ d = popPS()
+ pushPS(b)
+ pushPS(a)
+ pushPS(d)
+ pushPS(c)
+ return NEXT
+end)
+
+TWOOVER = defPrimWord("2OVER", () -> begin
+ ensurePSDepth(4)
+ a = mem[reg.PSP-3]
+ b = mem[reg.PSP-2]
+ pushPS(a)
+ pushPS(b)
+ return NEXT
+end)
+
+QDUP = defPrimWord("?DUP", () -> begin
+ ensurePSDepth(1)
+ val = mem[reg.PSP]
+ if val != 0
+ pushPS(val)
+ end
+ return NEXT
+end)
+
+INCR = defPrimWord("1+", () -> begin
+ ensurePSDepth(1)
+ mem[reg.PSP] += 1
+ return NEXT
+end)
+
+DECR = defPrimWord("1-", () -> begin
+ ensurePSDepth(1)
+ mem[reg.PSP] -= 1
+ return NEXT
+end)
+
+INCR2 = defPrimWord("2+", () -> begin
+ ensurePSDepth(1)
+ mem[reg.PSP] += 2
+ return NEXT
+end)
+
+DECR2 = defPrimWord("2-", () -> begin
+ ensurePSDepth(1)
+ mem[reg.PSP] -= 2
+ return NEXT
+end)
+
+ADD = defPrimWord("+", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a+b)
+ return NEXT
+end)
+
+SUB = defPrimWord("-", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a-b)
+ return NEXT
+end)
+
+MUL = defPrimWord("*", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a*b)
+ return NEXT
+end)
+
+DIVMOD = defPrimWord("/MOD", () -> begin
+ b = popPS()
+ a = popPS()
+ q,r = divrem(a,b)
+ pushPS(r)
+ pushPS(q)
+ return NEXT
+end)
+
+TWOMUL = defPrimWord("2*", () -> begin
+ pushPS(popPS() << 1)
+ return NEXT
+end)
+
+TWODIV = defPrimWord("2/", () -> begin
+ pushPS(popPS() >> 1)
+ return NEXT
+end)
+
+EQ = defPrimWord("=", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a==b ? -1 : 0)
+ return NEXT
+end)
+
+NE = defPrimWord("<>", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a!=b ? -1 : 0)
+ return NEXT
+end)
+
+LT = defPrimWord("<", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a<b ? -1 : 0)
+ return NEXT
+end)
+
+GT = defPrimWord(">", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a>b ? -1 : 0)
+ return NEXT
+end)
+
+LE = defPrimWord("<=", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a<=b ? -1 : 0)
+ return NEXT
+end)
+
+GE = defPrimWord(">=", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a>=b ? -1 : 0)
+ return NEXT
+end)
+
+ZE = defPrimWord("0=", () -> begin
+ pushPS(popPS() == 0 ? -1 : 0)
+ return NEXT
+end)
+
+ZNE = defPrimWord("0<>", () -> begin
+ pushPS(popPS() != 0 ? -1 : 0)
+ return NEXT
+end)
+
+ZLT = defPrimWord("0<", () -> begin
+ pushPS(popPS() < 0 ? -1 : 0)
+ return NEXT
+end)
+
+ZGT = defPrimWord("0>", () -> begin
+ pushPS(popPS() > 0 ? -1 : 0)
+ return NEXT
+end)
+
+ZLE = defPrimWord("0<=", () -> begin
+ pushPS(popPS() <= 0 ? -1 : 0)
+ return NEXT
+end)
+
+ZGE = defPrimWord("0>=", () -> begin
+ pushPS(popPS() >= 0 ? -1 : 0)
+ return NEXT
+end)
+
+AND = defPrimWord("AND", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a & b)
+ return NEXT
+end)
+
+OR = defPrimWord("OR", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a | b)
+ return NEXT
+end)
+
+XOR = defPrimWord("XOR", () -> begin
+ b = popPS()
+ a = popPS()
+ pushPS(a $ b)
+ return NEXT
+end)
+
+INVERT = defPrimWord("INVERT", () -> begin
+ pushPS(~popPS())
+ return NEXT
+end)
+
+# Literals
+
+LIT = defPrimWord("LIT", () -> begin
+ pushPS(mem[reg.IP])
+ reg.IP += 1
+ return NEXT
+end)
+
+# Memory primitives
+
+STORE = defPrimWord("!", () -> begin
+ addr = popPS()
+ dat = popPS()
+ mem[addr] = dat
+ return NEXT
+end)
+
+FETCH = defPrimWord("@", () -> begin
+ addr = popPS()
+ pushPS(mem[addr])
+ return NEXT
+end)
+
+ADDSTORE = defPrimWord("+!", () -> begin
+ addr = popPS()
+ toAdd = popPS()
+ mem[addr] += toAdd
+ return NEXT
+end)
+
+SUBSTORE = defPrimWord("-!", () -> begin
+ addr = popPS()
+ toSub = popPS()
+ mem[addr] -= toSub
+ return NEXT
+end)
+
+
+# Return Stack
+
+TOR = defPrimWord(">R", () -> begin
+ pushRS(popPS())
+ return NEXT
+end)
+
+FROMR = defPrimWord("R>", () -> begin
+ pushPS(popRS())
+ return NEXT
+end)
+
+RFETCH = defPrimWord("R@", () -> begin
+ pushPS(mem[reg.RSP])
+ return NEXT
+end)
+
+RSPFETCH = defPrimWord("RSP@", () -> begin
+ pushPS(reg.RSP)
+ return NEXT
+end)
+
+RSPSTORE = defPrimWord("RSP!", () -> begin
+ RSP = popPS()
+ return NEXT
+end)
+
+RDROP = defPrimWord("RDROP", () -> begin
+ popRS()
+ return NEXT
+end)
+
+# Parameter Stack
+
+PSPFETCH = defPrimWord("PSP@", () -> begin
+ pushPS(reg.PSP)
+ return NEXT
+end)
+
+PSPSTORE = defPrimWord("PSP!", () -> begin
+ PSP = popPS()
+ return NEXT
+end)
+
+# Working Register
+
+WFETCH = defPrimWord("W@", () -> begin
+ pushPS(reg.W)
+ return NEXT
+end)
+
+WSTORE = defPrimWord("W!", () -> begin
+ reg.W = popPS()
+ return NEXT
+end)
+
+# I/O
+
+sources = Array{Any,1}()
+currentSource() = sources[length(sources)]
+
+EOF_CFA = defConst("EOF", 4)
+
+EMIT = defPrimWord("EMIT", () -> begin
+ print(Char(popPS()))
+ return NEXT
+end)
+
+SPAN, SPAN_CFA = defNewVar("SPAN", 0)
+EXPECT = defPrimWord("EXPECT", () -> begin
+ maxLen = popPS()
+ addr = popPS()
+
+ if !eof(currentSource())
+ line = chomp(readline(currentSource()))
+ mem[SPAN] = min(length(line), maxLen)
+ putString(line[1:mem[SPAN]], addr)
+ else
+ mem[SPAN] = 1
+ mem[addr] = EOF
+ end
+
+ return NEXT
+end)
+
+BASE, BASE_CFA = defNewVar("BASE", 10)
+NUMBER = defPrimWord("NUMBER", () -> begin
+ wordAddr = popPS()+1
+ wordLen = mem[wordAddr-1]
+
+ s = getString(wordAddr, wordLen)
+
+ pushPS(parse(Int64, s, mem[BASE]))
+
+ return NEXT
+end)
+
+# Dictionary searches
+
+FIND = defPrimWord("FIND", () -> begin
+
+ countedAddr = popPS()
+ wordAddr = countedAddr + 1
+ wordLen = mem[countedAddr]
+ word = lowercase(getString(wordAddr, wordLen))
+
+ latest = LATEST
+
+ i = 0
+ while (latest = mem[latest]) > 0
+ lenAndFlags = mem[latest+1]
+ len = lenAndFlags & F_LENMASK
+ hidden = (lenAndFlags & F_HIDDEN) == F_HIDDEN
+
+ if hidden || len != wordLen
+ continue
+ end
+
+ thisAddr = latest+2
+ thisWord = lowercase(getString(thisAddr, len))
+
+ if lowercase(thisWord) == lowercase(word)
+ break
+ end
+ end
+
+ pushPS(latest)
+
+ return NEXT
+end)
+
+TOCFA = defPrimWord(">CFA", () -> begin
+
+ addr = popPS()
+ lenAndFlags = mem[addr+1]
+ len = lenAndFlags & F_LENMASK
+
+ pushPS(addr + 2 + len)
+
+ return NEXT
+end)
+
+TOPFA = defWord(">PFA", [TOCFA, INCR, EXIT])
+
+# Branching
+
+BRANCH = defPrimWord("BRANCH", () -> begin
+ reg.IP += mem[reg.IP]
+ return NEXT
+end)
+
+ZBRANCH = defPrimWord("0BRANCH", () -> begin
+ if (popPS() == 0)
+ reg.IP += mem[reg.IP]