signature CODEGEN =
sig
- val codegen : Tree.stm list -> x86.insn list
+ val codegen : Tree.stm list -> Blarg.insn list
end
structure Codegen :> CODEGEN =
struct
structure T = Tree
- structure X = x86
-
- (* effect : T.exp -> bool
- * true iff the given expression has an effect.
- *)
- fun effect (T.BINOP(T.DIV, _, _)) = true
- | effect (T.BINOP(T.MOD, _, _)) = true
- | effect (T.CALL _) = true
- | effect (T.BINOP(_, a, b)) = (effect a) orelse (effect b)
- | effect (T.UNOP (_, a)) = effect a
- | effect _ = false
+ structure TU = TreeUtils
+ structure X = Blarg
+ structure Tm = Temp
(* hasfixed : T.exp -> bool
- * true iff the given expression has an hasfixed. Somewhat like effect, hmm?
+ * true iff the given expression has an hasfixed.
*)
- fun hasfixed (T.BINOP(T.DIV, _, _)) = true
- | hasfixed (T.BINOP(T.MOD, _, _)) = true
- | hasfixed (T.BINOP(T.LSH, _, _)) = true
- | hasfixed (T.BINOP(T.RSH, _, _)) = true
- | hasfixed (T.CALL _) = true
+ fun hasfixed (T.CALL _) = true
| hasfixed (T.BINOP(_, a, b)) = (hasfixed a) orelse (hasfixed b)
| hasfixed (T.UNOP (_, a)) = hasfixed a
+ | hasfixed (T.ALLOC(_)) = true
+ | hasfixed (T.MEMORY (m)) = hasfixed m
+ | hasfixed (T.STMVAR _) = true
| hasfixed _ = false
+ (* binophit : X.oper -> X.opc -> T.exp -> T.exp -> X.insn list *)
+ (* binophit d oper e1 e2
+ * generates instructions to achieve d <- e1 oper e2
+ * oper should be something like X.ADD
+ *)
+ fun binophit d oper e1 e2 =
+ let
+ val t = X.TEMP (Tm.new "binop")
+ val i1 = munch_exp d e1
+ val i2 = munch_exp t e2
+(* val _ = print ("s1 = " ^ Tm.sfx s1 ^ ", s2 = " ^ Tm.sfx s2 ^ ", ") *)
+(* val _ = print ("rs = " ^ Tm.sfx rs ^ " from " ^ TU.Print.pp_exp e1 ^ " and " ^ TU.Print.pp_exp e2 ^ "\n") *)
+ in
+ [X.COMMENT "binophit" ] @ i1 @ i2 @ [X.INSN (X.AL, oper (d, t)), X.COMMENT "binophit done"]
+ end
+
+ (* cmphit : X.oper -> X.exp -> X.insn list
+ * cmphit d ex
+ * generates instructions to set d based on the truth value of ex
+ *)
+ and cmphit d ex =
+ let
+ val (insns, pos, neg) = munch_cond ex
+ in
+ insns @ [X.INSN (X.AL, X.MOVLIT (d, 0w0)), X.INSN (pos, X.MOVLIT (d, 0w1))]
+ end
+
(* munch_exp : prex86oper -> T.exp -> prex86insn list *)
(* munch_exp d e
* generates instructions to achieve d <- e
* d must be TEMP(t) or REG(r)
*)
- fun munch_exp d (T.CONST(n)) = [X.MOV(d, X.CONST n)]
- | munch_exp d (T.TEMP(t)) = [X.MOV(d, X.TEMP t)]
- | munch_exp d (T.ARG(0)) = [X.MOV(d, X.REG X.EDI)]
- | munch_exp d (T.ARG(1)) = [X.MOV(d, X.REG X.ESI)]
- | munch_exp d (T.ARG(2)) = [X.MOV(d, X.REG X.EDX)]
- | munch_exp d (T.ARG(3)) = [X.MOV(d, X.REG X.ECX)]
- | munch_exp d (T.ARG(4)) = [X.MOV(d, X.REG X.R8D)]
- | munch_exp d (T.ARG(5)) = [X.MOV(d, X.REG X.R9D)]
- | munch_exp d (T.ARG(t)) = [X.MOV(d, X.STACKARG (t - 6))]
- | munch_exp d (T.CALL(name, l)) = (* Scary demons live here. *)
+ and munch_exp d (T.CONST n) = [X.INSN (X.AL, X.MOVLIT(d, Word.fromLarge n))]
+ | munch_exp d (T.NULLPTR) = [X.INSN (X.AL, X.MOVLIT(d, 0w0))]
+ | munch_exp d (T.TEMP(t)) = [X.INSN (X.AL, X.MOV(d, X.TEMP t))]
+ | munch_exp d (T.ARG(0)) = [X.INSN (X.AL, X.MOV(d, X.REG X.R0))]
+ | munch_exp d (T.ARG(1)) = [X.INSN (X.AL, X.MOV(d, X.REG X.R1))]
+ | munch_exp d (T.ARG(2)) = [X.INSN (X.AL, X.MOV(d, X.REG X.R2))]
+ | munch_exp d (T.ARG(3)) = [X.INSN (X.AL, X.MOV(d, X.REG X.R3))]
+ | munch_exp d (T.ARG(t)) = [X.INSN (X.AL, X.MOV(d, X.STACKARG (t - 4)))]
+ | munch_exp d (T.CALL(name, l)) = (* Scary demons live here. *)
let
val nargs = length l
- val nstack = if (nargs <= 6)
+ val nstack = if (nargs <= 4)
then 0
- else nargs - 6
- val stackb = nstack * 8
- fun argdest 1 = X.REG X.EDI
- | argdest 2 = X.REG X.ESI
- | argdest 3 = X.REG X.EDX
- | argdest 4 = X.REG X.ECX
- | argdest 5 = X.REG X.R8D
- | argdest 6 = X.REG X.R9D
- | argdest n = X.REL (X.RSP, (~(stackb - 8 * (n - 7))))
+ else nargs - 4
+ val stackb = nstack * 1
+ fun argdest 1 = X.REG X.R0
+ | argdest 2 = X.REG X.R1
+ | argdest 3 = X.REG X.R2
+ | argdest 4 = X.REG X.R3
+ | argdest n = raise ErrorMsg.InternalError "more than 4 args not supported yet" (*X.REL ((X.REG X.RSP, Tm.Quad), (X.CONST (Word32.fromInt (~(stackb - 8 * (n - 7)))), Tm.Quad), 0w1)*)
val dests = List.tabulate (nargs, fn x => argdest (x+1))
val hf = List.map hasfixed l
- val (d_hf, exps_hf) = ListPair.unzip (ListPair.foldr
+ val (d_hf, l_hf) = ListPair.unzip (ListPair.foldr
(fn (a,b,c) => if b then a::c else c)
nil
(ListPair.zip (dests,l), hf)
)
- val (d_nohf, exps_nohf) = ListPair.unzip (ListPair.foldr
+ val (d_nohf, l_nohf) = ListPair.unzip (ListPair.foldr
(fn (a,b,c) => if b then c else a::c)
nil
(ListPair.zip (dests,l), hf)
)
- val temps = List.tabulate (List.length d_hf, fn x => Temp.new(Int.toString x ^ " arg"))
+ val temps = List.map (fn _ => Temp.new ("arg")) l_hf
val argevals_hf = List.map
(fn (t,exp) => munch_exp (X.TEMP t) exp)
- (ListPair.zip (temps, exps_hf))
+ (ListPair.zip (temps, l_hf))
val argpushes = List.map
- (fn (dest, t) => [(X.MOV (dest, X.TEMP t))])
+ (fn (dest, t) => [X.INSN (X.AL, X.MOV (dest, X.TEMP t))])
(ListPair.zip (d_hf, temps))
val argevals_nohf = List.map
(fn (d,exp) => munch_exp d exp)
- (ListPair.zip (d_nohf, exps_nohf))
+ (ListPair.zip (d_nohf, l_nohf))
+
+ val t_stackb = Temp.new ("stackb")
+ val t_target = Temp.new ("target")
in
List.concat argevals_hf @
List.concat argpushes @
List.concat argevals_nohf @
- [ X.SIZE (X.Qword, X.SUB (X.REG X.RSP, X.CONST (Word32.fromInt stackb))),
- X.CALL (name, nargs),
- X.SIZE (X.Qword, X.ADD (X.REG X.RSP, X.CONST (Word32.fromInt stackb))),
- X.MOV (d, X.REG X.EAX) ] (* Finally! *)
- end
- | munch_exp d (T.BINOP(T.ADD, e1, T.CONST 0w0)) = munch_exp d e1
- | munch_exp d (T.BINOP(T.ADD, T.CONST 0w0, e1)) = munch_exp d e1
- | munch_exp d (T.BINOP(T.ADD, e1, T.CONST n)) = (munch_exp d e1) @ [X.ADD(d, X.CONST n)]
- | munch_exp d (T.BINOP(T.ADD, T.CONST n, e1)) = (munch_exp d e1) @ [X.ADD(d, X.CONST n)]
- | munch_exp d (T.BINOP(T.ADD, e1, T.TEMP t)) = (munch_exp d e1) @ [X.ADD(d, X.TEMP t)]
- | munch_exp d (T.BINOP(T.ADD, T.TEMP t, e2)) = (munch_exp d e2) @ [X.ADD(d, X.TEMP t)]
- | munch_exp d (T.BINOP(T.ADD, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("add"))
- in
- (munch_exp d e1) @ (munch_exp t1 e2) @ [X.ADD(d, t1)]
- end
- | munch_exp d (T.BINOP(T.SUB, T.CONST 0w0, e1)) = (munch_exp d e1) @ [X.NEG d]
- | munch_exp d (T.BINOP(T.SUB, e1, T.CONST 0w0)) = munch_exp d e1
- | munch_exp d (T.BINOP(T.SUB, e1, T.CONST(n))) = (munch_exp d e1) @ [X.SUB(d, X.CONST n)]
- | munch_exp d (T.BINOP(T.SUB, e1, T.TEMP t)) = (munch_exp d e1) @ [X.SUB(d, X.TEMP t)]
- | munch_exp d (T.BINOP(T.SUB, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("sub"))
- in
- (munch_exp d e1) @ (munch_exp t1 e2) @ [X.SUB(d, t1)]
- end
- | munch_exp d (T.BINOP(T.MUL, T.TEMP t, T.CONST n)) = [X.IMUL3(d, X.TEMP t, n)]
- | munch_exp d (T.BINOP(T.MUL, T.CONST n, T.TEMP t)) = [X.IMUL3(d, X.TEMP t, n)]
- | munch_exp d (T.BINOP(T.MUL, e1, T.CONST 0w1)) = munch_exp d e1
- | munch_exp d (T.BINOP(T.MUL, T.CONST 0w1, e1)) = munch_exp d e1
- | munch_exp d (T.BINOP(T.MUL, e1, T.CONST n)) = (munch_exp d e1) @ [X.IMUL(d, X.CONST n)]
- | munch_exp d (T.BINOP(T.MUL, T.CONST n, e1)) = (munch_exp d e1) @ [X.IMUL(d, X.CONST n)]
- | munch_exp d (T.BINOP(T.MUL, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("mul"))
- in
- (munch_exp d e1) @ (munch_exp t1 e2) @ [X.IMUL(d, t1)]
- end
- | munch_exp d (T.BINOP(T.DIV, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("div"))
- in
- (munch_exp t1 e1) @ (munch_exp d e2) @
- [X.MOV (X.REG X.EAX, t1), X.CLTD, X.IDIV d, X.MOV (d, X.REG X.EAX)]
- end
- | munch_exp d (T.BINOP(T.MOD, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("mod"))
- in
- (munch_exp t1 e1) @ (munch_exp d e2) @
- [X.MOV (X.REG X.EAX, t1), X.CLTD, X.IDIV d, X.MOV (d, X.REG X.EDX)]
- end
- | munch_exp d (T.BINOP(T.LSH, e1, T.CONST n)) = (munch_exp d e1) @ [X.SAL (d, X.CONST (n mod 0w32))]
- | munch_exp d (T.BINOP(T.LSH, e1, T.TEMP t)) = (munch_exp d e1) @ [X.MOV (X.REG X.ECX, X.TEMP t), X.SAL (d, X.REG X.ECX)]
- | munch_exp d (T.BINOP(T.LSH, e1, e2)) =
- let
- val t = X.TEMP (Temp.new ("lsh"))
- in
- (munch_exp d e1) @ (munch_exp t e2) @ [X.MOV (X.REG X.ECX, t), X.SAL (d, X.REG X.ECX)]
- end
- | munch_exp d (T.BINOP(T.RSH, e1, T.CONST n)) = (munch_exp d e1) @ [X.SAR (d, X.CONST (n mod 0w32))]
- | munch_exp d (T.BINOP(T.RSH, e1, T.TEMP t)) = (munch_exp d e1) @ [X.MOV (X.REG X.ECX, X.TEMP t), X.SAR (d, X.REG X.ECX)]
- | munch_exp d (T.BINOP(T.RSH, e1, e2)) =
- let
- val t = X.TEMP (Temp.new ("rsh"))
- in
- (munch_exp d e1) @ (munch_exp t e2) @ [X.MOV (X.REG X.ECX, t), X.SAR (d, X.REG X.ECX)]
- end
- | munch_exp d (T.BINOP(T.BITAND, T.CONST n, e1)) = (munch_exp d e1) @ [X.AND (d, X.CONST n)]
- | munch_exp d (T.BINOP(T.BITAND, e1, T.CONST n)) = (munch_exp d e1) @ [X.AND (d, X.CONST n)]
- | munch_exp d (T.BINOP(T.BITAND, T.TEMP t, e1)) = (munch_exp d e1) @ [X.AND (d, X.TEMP t)]
- | munch_exp d (T.BINOP(T.BITAND, e1, T.TEMP t)) = (munch_exp d e1) @ [X.AND (d, X.TEMP t)]
- | munch_exp d (T.BINOP(T.BITAND, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("bitand"))
- in
- (munch_exp d e1) @ (munch_exp t1 e2) @ [X.AND(d, t1)]
- end
- | munch_exp d (T.BINOP(T.BITOR, T.CONST n, e1)) = (munch_exp d e1) @ [X.OR (d, X.CONST n)]
- | munch_exp d (T.BINOP(T.BITOR, e1, T.CONST n)) = (munch_exp d e1) @ [X.OR (d, X.CONST n)]
- | munch_exp d (T.BINOP(T.BITOR, T.TEMP t, e1)) = (munch_exp d e1) @ [X.OR (d, X.TEMP t)]
- | munch_exp d (T.BINOP(T.BITOR, e1, T.TEMP t)) = (munch_exp d e1) @ [X.OR (d, X.TEMP t)]
- | munch_exp d (T.BINOP(T.BITOR, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("bitor"))
- in
- (munch_exp d e1) @ (munch_exp t1 e2) @ [X.OR(d, t1)]
+ [ X.INSN (X.AL, X.MOVLIT (X.TEMP t_stackb, Word.fromInt stackb)),
+ X.INSN (X.AL, X.MOVSYM (X.TEMP t_target, name)),
+ X.INSN (X.AL, X.SUB (X.REG X.SP, X.TEMP t_stackb)),
+ X.INSN (X.AL, X.CALL (X.REG X.SP, X.TEMP t_target, nargs)),
+ X.INSN (X.AL, X.ADD (X.REG X.SP, X.TEMP t_stackb)),
+ X.INSN (X.AL, X.MOV (d, X.REG X.R0))]
end
- | munch_exp d (T.BINOP(T.BITXOR, T.CONST n, e1)) = (munch_exp d e1) @ [X.XOR (d, X.CONST n)]
- | munch_exp d (T.BINOP(T.BITXOR, e1, T.CONST n)) = (munch_exp d e1) @ [X.XOR (d, X.CONST n)]
- | munch_exp d (T.BINOP(T.BITXOR, T.TEMP t, e1)) = (munch_exp d e1) @ [X.XOR (d, X.TEMP t)]
- | munch_exp d (T.BINOP(T.BITXOR, e1, T.TEMP t)) = (munch_exp d e1) @ [X.XOR (d, X.TEMP t)]
+ (*| munch_exp d (T.BINOP(T.ADD, e1, T.CONST n)) = binophit_c d X.ADD e1 n
+ | munch_exp d (T.BINOP(T.ADD, T.CONST n, e1)) = binophit_c d X.ADD e1 n
+ | munch_exp d (T.BINOP(T.ADD, e1, T.TEMP t)) = binophit_t d X.ADD e1 t
+ | munch_exp d (T.BINOP(T.ADD, T.TEMP t, e1)) = binophit_t d X.ADD e1 t*)
+ | munch_exp d (T.BINOP(T.ADD, e1, e2)) = binophit d X.ADD e1 e2
+
+ (*| munch_exp d (T.BINOP(T.SUB, e1, T.CONST n)) = binophit_c d X.SUB e1 n
+ | munch_exp d (T.BINOP(T.SUB, e1, T.TEMP t)) = binophit_t d X.SUB e1 t*)
+ | munch_exp d (T.BINOP(T.SUB, e1, e2)) = binophit d X.SUB e1 e2
+ | munch_exp d (T.BINOP(T.MUL, e1, e2)) = munch_exp d (T.CALL (Symbol.symbol "__blarg_mul", [e1, e2]))
+ | munch_exp d (T.BINOP(T.DIV, e1, e2)) = munch_exp d (T.CALL (Symbol.symbol "__blarg_div", [e1, e2]))
+ | munch_exp d (T.BINOP(T.MOD, e1, e2)) = munch_exp d (T.CALL (Symbol.symbol "__blarg_mod", [e1, e2]))
+ | munch_exp d (T.BINOP(T.LSH, e1, e2)) = binophit d X.SHL e1 e2
+ | munch_exp d (T.BINOP(T.RSH, e1, e2)) = binophit d X.SHR e1 e2
+ | munch_exp d (T.BINOP(T.BITAND, e1, e2)) = binophit d X.AND e1 e2
+ | munch_exp d (T.BINOP(T.BITOR, e1, e2)) = munch_exp d (T.UNOP (T.BITNOT, T.BINOP (T.BITAND, T.UNOP (T.BITNOT, e1), T.UNOP (T.BITNOT, e2))))
| munch_exp d (T.BINOP(T.BITXOR, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("bitxor"))
- in
- (munch_exp d e1) @ (munch_exp t1 e2) @ [X.XOR(d, t1)]
- end
+ munch_exp d (T.BINOP(T.BITOR, T.BINOP(T.BITAND, e1, T.UNOP(T.BITNOT, e2)),
+ T.BINOP(T.BITAND, e2, T.UNOP(T.BITNOT, e1))))
+
| munch_exp d (a as T.BINOP(T.LOGAND, e1, e2)) =
let
val (insn1, pos1, neg1) = munch_cond e1
val (insn2, pos2, neg2) = munch_cond e2
- val t1 = X.TEMP (Temp.new("logand 1"))
- val t2 = X.TEMP (Temp.new("logand 2"))
val l = Label.new ()
in
- if (effect e2 orelse (length insn2 > 10))
- then (insn1) @
- [X.SETcc(pos1, t1), X.Jcc (neg1, l)] @
- (insn2) @
- [X.SETcc(pos2, t1), X.LABEL l, X.MOVZB(d, t1)]
- else insn1 @ [X.SETcc (pos1, t1)] @ insn2 @ [X.SETcc (pos2, t2), X.SIZE(X.Byte, X.AND(t1, t2)), X.MOVZB(d, t1)]
+ (insn1) @
+ [X.INSN (X.AL, X.MOVLIT (d, 0w0)),
+ X.INSN (neg1, X.MOVLBL (X.REG X.PC, l))] @
+ (insn2) @
+ [X.INSN (pos2, X.MOVLIT (d, 0w1)),
+ X.LABEL l]
end
| munch_exp d (a as T.BINOP(T.LOGOR, e1, e2)) =
let
val (insn1, pos1, neg1) = munch_cond e1
val (insn2, pos2, neg2) = munch_cond e2
- val t1 = X.TEMP (Temp.new("logor 1"))
- val t2 = X.TEMP (Temp.new("logor 2"))
+ val t1 = X.TEMP (Tm.new "logand 1")
+ val t2 = X.TEMP (Tm.new "logand 2")
val l = Label.new ()
in
- if (effect e2 orelse (length insn2 > 10))
- then (insn1) @
- [X.SETcc(pos1, t1), X.Jcc (pos1, l)] @
- (insn2) @
- [X.SETcc(pos2, t1), X.LABEL l, X.MOVZB(d, t1)]
- else insn1 @ [X.SETcc (pos1, t1)] @ insn2 @ [X.SETcc (pos2, t2), X.SIZE(X.Byte, X.OR(t1, t2)), X.MOVZB(d, t1)]
+ (insn1) @
+ [X.INSN (X.AL, X.MOVLIT (d, 0w0)),
+ X.INSN (pos1, X.MOVLIT (d, 0w1)),
+ X.INSN (pos1, X.MOVLBL (X.REG X.PC, l))] @
+ (insn2) @
+ [X.INSN (pos2, X.MOVLIT (d, 0w1)),
+ X.LABEL l]
end
- | munch_exp d (a as T.BINOP(T.EQ, _, _)) =
- let val (insns, pos, neg) = munch_cond a in insns @ [X.SETcc (pos, d), X.MOVZB(d, d)] end
- | munch_exp d (a as T.BINOP(T.NEQ, _, _)) =
- let val (insns, pos, neg) = munch_cond a in insns @ [X.SETcc (pos, d), X.MOVZB(d, d)] end
- | munch_exp d (a as T.BINOP(T.LE, _, _)) =
- let val (insns, pos, neg) = munch_cond a in insns @ [X.SETcc (pos, d), X.MOVZB(d, d)] end
- | munch_exp d (a as T.BINOP(T.LT, _, _)) =
- let val (insns, pos, neg) = munch_cond a in insns @ [X.SETcc (pos, d), X.MOVZB(d, d)] end
- | munch_exp d (a as T.BINOP(T.GE, _, _)) =
- let val (insns, pos, neg) = munch_cond a in insns @ [X.SETcc (pos, d), X.MOVZB(d, d)] end
- | munch_exp d (a as T.BINOP(T.GT, _, _)) =
- let val (insns, pos, neg) = munch_cond a in insns @ [X.SETcc (pos, d), X.MOVZB(d, d)] end
- | munch_exp d (T.UNOP(T.NEG, T.CONST n)) = [X.MOV (d, X.CONST (~n))]
- | munch_exp d (T.UNOP(T.NEG, e1)) = (munch_exp d e1) @ [X.NEG d]
- | munch_exp d (T.UNOP(T.BITNOT, T.CONST n)) = [X.MOV (d, X.CONST (Word32.notb n))]
- | munch_exp d (T.UNOP(T.BITNOT, e1)) = (munch_exp d e1) @ [X.NOT d]
- | munch_exp d (T.UNOP(T.BANG, T.CONST n)) = if (n = 0w0) then [X.MOV (d, X.CONST 0w1)] else [X.MOV (d, X.CONST 0w0)]
- | munch_exp d (T.UNOP(T.BANG, e)) =
+ | munch_exp d (a as T.BINOP(T.EQ, _, _)) = cmphit d a
+ | munch_exp d (a as T.BINOP(T.NEQ, _, _)) = cmphit d a
+ | munch_exp d (a as T.BINOP(T.LE, _, _)) = cmphit d a
+ | munch_exp d (a as T.BINOP(T.LT, _, _)) = cmphit d a
+ | munch_exp d (a as T.BINOP(T.GE, _, _)) = cmphit d a
+ | munch_exp d (a as T.BINOP(T.GT, _, _)) = cmphit d a
+ | munch_exp d (a as T.BINOP(T.BE, _, _)) = cmphit d a
+
+ | munch_exp d (T.UNOP(T.NEG, e1)) =
let
- val (insns, pos, neg) = munch_cond e
+ val t = Temp.new "-val"
+ val i = munch_exp (X.TEMP t) e1
in
- insns @ [X.SETcc (neg, d), X.MOVZB(d, d)]
+ (i) @
+ [X.INSN (X.AL, X.MOVLIT (d, 0w0)),
+ X.INSN (X.AL, X.SUB (d, X.TEMP t))]
end
- (* munch_cond : T.exp -> X.insn list * X.cond * X.cond
- * munch_cond stm generates code to set flags, and then returns a conditional
- * to test if the expression was true and for if it was false.
- *)
- and munch_cond (T.UNOP (T.BANG, e)) =
+ | munch_exp d (T.UNOP(T.BITNOT, e1)) = let val i = munch_exp d e1 in i @ [X.INSN (X.AL, X.NOT (d, d))] end
+ | munch_exp d (T.UNOP(T.BANG, e)) =
let
val (insns, pos, neg) = munch_cond e
in
- (insns, neg, pos)
- end
- | munch_cond (T.BINOP(T.NEQ, T.TEMP t, T.CONST n)) = ([X.CMP(X.TEMP t, X.CONST n)], X.NE, X.E)
- | munch_cond (T.BINOP(T.NEQ, T.CONST n, T.TEMP t)) = ([X.CMP(X.TEMP t, X.CONST n)], X.NE, X.E)
- | munch_cond (T.BINOP(T.NEQ, T.CONST n, e1)) =
- let val t = X.TEMP (Temp.new ("const neq")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.NE, X.E) end
- | munch_cond (T.BINOP(T.NEQ, e1, T.CONST n)) =
- let val t = X.TEMP (Temp.new ("const neq")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.NE, X.E) end
- | munch_cond (T.BINOP(T.NEQ, T.TEMP t, e1)) =
- let val t1 = X.TEMP (Temp.new ("const neq")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.NE, X.E) end
- | munch_cond (T.BINOP(T.NEQ, e1, T.TEMP t)) =
- let val t1 = X.TEMP (Temp.new ("const neq")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.NE, X.E) end
- | munch_cond (T.BINOP(T.NEQ, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("var neq 1"))
- val t2 = X.TEMP (Temp.new ("var neq 2"))
- in
- (munch_exp t1 e1 @ munch_exp t2 e2 @
- [X.CMP(t1, t2)], X.NE, X.E)
- end
- | munch_cond (T.BINOP(T.EQ, T.TEMP t, T.CONST n)) = ([X.CMP(X.TEMP t, X.CONST n)], X.E, X.NE)
- | munch_cond (T.BINOP(T.EQ, T.CONST n, T.TEMP t)) = ([X.CMP(X.TEMP t, X.CONST n)], X.E, X.NE)
- | munch_cond (T.BINOP(T.EQ, T.CONST n, e1)) =
- let val t = X.TEMP (Temp.new ("const eq")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.E, X.NE) end
- | munch_cond (T.BINOP(T.EQ, e1, T.CONST n)) =
- let val t = X.TEMP (Temp.new ("const eq")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.E, X.NE) end
- | munch_cond (T.BINOP(T.EQ, T.TEMP t, e1)) =
- let val t1 = X.TEMP (Temp.new ("const eq")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.E, X.NE) end
- | munch_cond (T.BINOP(T.EQ, e1, T.TEMP t)) =
- let val t1 = X.TEMP (Temp.new ("const eq")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.E, X.NE) end
- | munch_cond (T.BINOP(T.EQ, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("var eq 1"))
- val t2 = X.TEMP (Temp.new ("var eq 2"))
- in
- (munch_exp t1 e1 @ munch_exp t2 e2 @
- [X.CMP(t1, t2)], X.E, X.NE)
+ insns @
+ [X.INSN (X.AL, X.MOVLIT (d, 0w0)),
+ X.INSN (neg, X.MOVLIT (d, 0w1))]
end
- | munch_cond (T.BINOP(T.LE, T.TEMP t, T.CONST n)) = ([X.CMP(X.TEMP t, X.CONST n)], X.LE, X.G)
- | munch_cond (T.BINOP(T.LE, T.CONST n, T.TEMP t)) = ([X.CMP(X.TEMP t, X.CONST n)], X.GE, X.L)
- | munch_cond (T.BINOP(T.LE, T.CONST n, e1)) =
- let val t = X.TEMP (Temp.new ("const le")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.GE, X.L) end
- | munch_cond (T.BINOP(T.LE, e1, T.CONST n)) =
- let val t = X.TEMP (Temp.new ("const le")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.LE, X.G) end
- | munch_cond (T.BINOP(T.LE, T.TEMP t, e1)) =
- let val t1 = X.TEMP (Temp.new ("const le")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.GE, X.L) end
- | munch_cond (T.BINOP(T.LE, e1, T.TEMP t)) =
- let val t1 = X.TEMP (Temp.new ("const le")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.LE, X.G) end
- | munch_cond (T.BINOP(T.LE, e1, e2)) =
+ | munch_exp d (T.MEMORY (e1)) =
let
- val t1 = X.TEMP (Temp.new ("var le 1"))
- val t2 = X.TEMP (Temp.new ("var le 2"))
+ val a = X.TEMP (Temp.new "addr")
+ val i = munch_exp a e1
in
- (munch_exp t1 e1 @ munch_exp t2 e2 @
- [X.CMP(t1, t2)], X.LE, X.G)
+ i @
+ [X.INSN (X.AL, X.LDR (d, a))]
end
- | munch_cond (T.BINOP(T.LT, T.TEMP t, T.CONST n)) = ([X.CMP(X.TEMP t, X.CONST n)], X.L, X.GE)
- | munch_cond (T.BINOP(T.LT, T.CONST n, T.TEMP t)) = ([X.CMP(X.TEMP t, X.CONST n)], X.G, X.LE)
- | munch_cond (T.BINOP(T.LT, T.CONST n, e1)) =
- let val t = X.TEMP (Temp.new ("const lt")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.G, X.LE) end
- | munch_cond (T.BINOP(T.LT, e1, T.CONST n)) =
- let val t = X.TEMP (Temp.new ("const lt")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.L, X.GE) end
- | munch_cond (T.BINOP(T.LT, T.TEMP t, e1)) =
- let val t1 = X.TEMP (Temp.new ("const lt")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.G, X.LE) end
- | munch_cond (T.BINOP(T.LT, e1, T.TEMP t)) =
- let val t1 = X.TEMP (Temp.new ("const lt")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.L, X.GE) end
- | munch_cond (T.BINOP(T.LT, e1, e2)) =
+
+ | munch_exp d (T.ALLOC(exp)) =
let
- val t1 = X.TEMP (Temp.new ("var lt 1"))
- val t2 = X.TEMP (Temp.new ("var lt 2"))
+ val t1 = Temp.new "alloc"
+ val l1 = Label.new()
+ val einsn = munch_exp (X.TEMP t1) exp
+ val insns = munch_exp d (T.CALL (Symbol.symbol "calloc", [T.TEMP t1, T.CONST 0w1]))
in
- (munch_exp t1 e1 @ munch_exp t2 e2 @
- [X.CMP(t1, t2)], X.L, X.GE)
+ einsn @ insns
end
- | munch_cond (T.BINOP(T.GT, T.TEMP t, T.CONST n)) = ([X.CMP(X.TEMP t, X.CONST n)], X.G, X.LE)
- | munch_cond (T.BINOP(T.GT, T.CONST n, T.TEMP t)) = ([X.CMP(X.TEMP t, X.CONST n)], X.L, X.GE)
- | munch_cond (T.BINOP(T.GT, e1, T.CONST n)) =
- let val t = X.TEMP (Temp.new ("const gt")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.G, X.LE) end
- | munch_cond (T.BINOP(T.GT, T.CONST n, e1)) =
- let val t = X.TEMP (Temp.new ("const gt")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.L, X.GE) end
- | munch_cond (T.BINOP(T.GT, e1, T.TEMP t)) =
- let val t1 = X.TEMP (Temp.new ("const gt")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.G, X.LE) end
- | munch_cond (T.BINOP(T.GT, T.TEMP t, e1)) =
- let val t1 = X.TEMP (Temp.new ("const gt")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.L, X.GE) end
- | munch_cond (T.BINOP(T.GT, e1, e2)) =
+(* | munch_exp d (T.COND(c, T.CONST n1, T.CONST n2)) = let val (i,p,n) = munch_cond c in ((X.MOV (d, X.CONST n1))::i) @ [X.CMOVcc (p, d, X.CONST n2)] end *)
+ | munch_exp d (T.COND(c,e1,e2)) =
let
- val t1 = X.TEMP (Temp.new ("var gt 1"))
- val t2 = X.TEMP (Temp.new ("var gt 2"))
+ val (insns, pos, neg) = munch_cond c
+ val l1 = Label.new()
+ val l2 = Label.new()
+ val i1 = munch_exp d e1
+ val i2 = munch_exp d e2
+(* val _ = print ("cond: size " ^ Tm.sfx s1 ^ " from " ^ TU.Print.pp_exp e1 ^ ", " ^ Tm.sfx s2 ^ " from " ^ TU.Print.pp_exp e2 ^ "\n") *)
in
- (munch_exp t1 e1 @ munch_exp t2 e2 @
- [X.CMP(t1, t2)], X.G, X.LE)
+ insns @
+ [X.INSN (neg, X.MOVLBL (X.REG X.PC, l1))] @
+ i1 @
+ [X.INSN (X.AL, X.MOVLBL (X.REG X.PC, l2)),
+ X.LABEL l1] @
+ i2 @
+ [X.LABEL l2]
end
- | munch_cond (T.BINOP(T.GE, T.TEMP t, T.CONST n)) = ([X.CMP(X.TEMP t, X.CONST n)], X.GE, X.L)
- | munch_cond (T.BINOP(T.GE, T.CONST n, T.TEMP t)) = ([X.CMP(X.TEMP t, X.CONST n)], X.LE, X.G)
- | munch_cond (T.BINOP(T.GE, e1, T.CONST n)) =
- let val t = X.TEMP (Temp.new ("const ge")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.GE, X.L) end
- | munch_cond (T.BINOP(T.GE, T.CONST n, e1)) =
- let val t = X.TEMP (Temp.new ("const ge")) in (munch_exp t e1 @ [X.CMP(t, X.CONST n)], X.LE, X.G) end
- | munch_cond (T.BINOP(T.GE, e1, T.TEMP t)) =
- let val t1 = X.TEMP (Temp.new ("const ge")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.GE, X.L) end
- | munch_cond (T.BINOP(T.GE, T.TEMP t, e1)) =
- let val t1 = X.TEMP (Temp.new ("const ge")) in (munch_exp t1 e1 @ [X.CMP(t1, X.TEMP t)], X.LE, X.G) end
- | munch_cond (T.BINOP(T.GE, e1, e2)) =
- let
- val t1 = X.TEMP (Temp.new ("var ge 1"))
- val t2 = X.TEMP (Temp.new ("var ge 2"))
- in
- (munch_exp t1 e1 @ munch_exp t2 e2 @
- [X.CMP(t1, t2)], X.GE, X.L)
- end
- | munch_cond (T.BINOP(T.LOGOR, e1, e2)) =
- let
- val (insn1, pos1, neg1) = munch_cond e1
- val (insn2, pos2, neg2) = munch_cond e2
- val t1 = X.TEMP (Temp.new("logor c 1"))
- val t2 = X.TEMP (Temp.new("logor c 2"))
- val l = Label.new ()
- in
- if (effect e2 orelse (length insn2 > 10))
- then ((insn1) @
- [X.SETcc (pos1, t1), X.Jcc (pos1, l)] @
- (insn2) @
- [X.SETcc (pos2, t1), X.LABEL l, X.SIZE (X.Byte, X.TEST (t1, t1))],
- X.NE, X.E)
- else (insn1 @ [X.SETcc (pos1, t1)] @ insn2 @ [X.SETcc (pos2, t2), X.SIZE(X.Byte, X.OR(t1, t2))], X.NE, X.E)
- end
- | munch_cond (T.BINOP(T.LOGAND, e1, e2)) =
+ | munch_exp d (T.STMVAR (sl, e)) = let val i = munch_exp d e in List.concat (map munch_stm sl) @ i end
+
+ and condhit e1 e2 (pos, neg) =
+ let
+ val t1 = X.TEMP (Temp.new ("var cond 1"))
+ val t2 = X.TEMP (Temp.new ("var cond 2"))
+ val i1 = munch_exp t1 e1
+ val i2 = munch_exp t2 e2
+ in
+ (i1 @ i2 @ [X.INSN (X.AL, X.SUBS (t1, t2))], pos, neg)
+ end
+
+ (* munch_cond : T.exp -> X.insn list * X.cond * X.cond
+ * munch_cond stm generates code to set flags, and then returns a conditional
+ * to test if the expression was true and for if it was false.
+ *)
+ and munch_cond (T.UNOP (T.BANG, e)) =
let
- val (insn1, pos1, neg1) = munch_cond e1
- val (insn2, pos2, neg2) = munch_cond e2
- val t1 = X.TEMP (Temp.new("logand c 1"))
- val t2 = X.TEMP (Temp.new("logand c 2"))
- val l = Label.new ()
+ val (insns, pos, neg) = munch_cond e
in
- if (effect e2 orelse (length insn2 > 10))
- then ((insn1) @
- [X.SETcc (pos1, t1), X.Jcc (neg1, l)] @
- (insn2) @
- [X.SETcc (pos2, t1), X.LABEL l, X.SIZE (X.Byte, X.TEST (t1, t1))],
- X.NE, X.E)
- else (insn1 @ [X.SETcc (pos1, t1)] @ insn2 @ [X.SETcc (pos2, t2), X.SIZE(X.Byte, X.AND(t1, t2))], X.NE, X.E)
+ (insns, neg, pos)
end
+ | munch_cond (T.BINOP(T.NEQ, e1, e2)) = condhit e1 e2 (X.NE, X.EQ)
+ | munch_cond (T.BINOP(T.EQ, e1, e2)) = condhit e1 e2 (X.EQ, X.NE)
+ | munch_cond (T.BINOP(T.LE, e1, e2)) = condhit e1 e2 (X.LE, X.GT)
+ | munch_cond (T.BINOP(T.LT, e1, e2)) = condhit e1 e2 (X.LT, X.GE)
+ | munch_cond (T.BINOP(T.GT, e1, e2)) = condhit e1 e2 (X.GT, X.LE)
+ | munch_cond (T.BINOP(T.GE, e1, e2)) = condhit e1 e2 (X.GE, X.LT)
+
+ | munch_cond (T.BINOP(T.BE, e1, e2)) = raise ErrorMsg.InternalError "memory safety not supported"
+
| munch_cond e =
let
val t = X.TEMP (Temp.new ("munch c"))
+ val i = munch_exp t e
+ in
+ (i @ [ X.INSN (X.AL, X.MOVS (t,t)) ], X.NE, X.EQ)
+ end
+
+ (* munch_lval : T.exp -> X.operand
+ * Takes an expression that has been typechecked as being a valid lvalue and a location of a datum, and then returns an instruction list to store.
+ *)
+ and munch_lval (T.TEMP t) oper = [X.INSN (X.AL, X.MOV (X.TEMP t, oper))]
+ | munch_lval (T.MEMORY m) oper =
+ let
+ val t = X.TEMP (Tm.new "lv addr")
+ val i = munch_exp t m
in
- (munch_exp t e @ [ X.TEST (t,t) ], X.NE, X.E)
+ i @
+ [X.INSN (X.AL, X.STO (t, oper))]
end
+ | munch_lval _ _ = raise ErrorMsg.InternalError "That wasn't really a valid lvalue..."
(* munch_stm : T.stm -> X.insn list *)
(* munch_stm stm generates code to execute stm *)
- fun munch_stm (T.MOVE (T.TEMP t, a as T.TEMP _)) = munch_exp (X.TEMP t) a
- | munch_stm (T.MOVE (T.TEMP t, a as T.CONST _)) = munch_exp (X.TEMP t) a
- | munch_stm (T.MOVE (T.TEMP t, a as T.ARG _)) = munch_exp (X.TEMP t) a
+ and munch_stm (T.MOVE (T.TEMP t1, T.TEMP t2)) = [X.INSN (X.AL, X.MOV(X.TEMP t1, X.TEMP t2))]
+ | munch_stm (T.MOVE (T.TEMP t, T.CONST n)) = [X.INSN (X.AL, X.MOVLIT(X.TEMP t, Word.fromLarge n))]
+ | munch_stm (T.MOVE (T.TEMP t, a as T.ARG (an))) =
+ let
+ val i = munch_exp (X.TEMP t) a
+ in
+ i
+ end
| munch_stm (T.MOVE (T.TEMP t, a as T.CALL _)) = munch_exp (X.TEMP t) a
- | munch_stm (T.MOVE(T.TEMP t1, e2)) =
+ | munch_stm (T.MOVE (a, e2)) =
let
- val t = Temp.new ("assign")
+ val t = X.TEMP (Temp.new ("assign"))
+ val i = munch_exp t e2
+ val li = munch_lval a t
in
- munch_exp (X.TEMP t) e2
- @ [X.MOV(X.TEMP t1, X.TEMP t)]
+ i @ li
end
- | munch_stm (T.MOVE(_, _)) =
- raise ErrorMsg.InternalError "Incorrect first operand for T.MOVE?"
| munch_stm (T.RETURN(e)) =
let
- val t = Temp.new ("retval")
+ val t = X.TEMP (Temp.new ("retval"))
+ val i = munch_exp t e
in
- munch_exp (X.TEMP t) e
- @ [X.MOV(X.REG X.EAX, X.TEMP t), X.RET]
+ i @ [X.INSN (X.AL, X.MOV(X.REG X.R0, t)), X.INSN (X.AL, X.POP (X.REG X.SP, X.REG X.PC))]
end
- | munch_stm (T.LABEL(l)) = [X.LABEL l]
- | munch_stm (T.JUMP(l)) = [X.JMP l]
+ | munch_stm (T.LABEL l) = [X.LABEL l]
+ | munch_stm (T.JUMP l) = [X.INSN (X.AL, X.MOVLBL (X.REG X.PC, l))]
| munch_stm (T.JUMPIFN(e, l)) =
let
val (insns, pos, neg) = munch_cond e
in
- insns @ [X.Jcc (neg, l)]
+ insns @ [X.INSN (neg, X.MOVLBL (X.REG X.PC, l))]
end
+ | munch_stm (T.EFFECT exp) = let val t = X.TEMP (Temp.new "throwaway") val i = munch_exp t exp in i end
fun codegen nil = nil
| codegen (stm::stms) = munch_stm stm @ codegen stms
git.joshuawise.com / snipe.git / blobdiff