First pass spill code.

[snipe.git] / codegen / codegen.sml

diff --git a/codegen/codegen.sml b/codegen/codegen.sml
index 804dee55108edf2cfcafea80e66e4880fefce845..a407a2014ec562685de39437787879d1f427c35b 100644 (file)
--- a/codegen/codegen.sml
+++ b/codegen/codegen.sml
@@ -40,7 +40,7 @@ struct
 (*      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"]
+      i1 @ i2 @ [X.INSN (X.AL, oper (d, t))]
     end
   
   (* cmphit : X.oper -> X.exp -> X.insn list
@@ -75,11 +75,20 @@ struct
                        then 0
                        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)*)
+          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 = 
+              let
+                val t = Temp.new "argdest"
+                val t2 = Temp.new "argptr"
+              in
+                (X.TEMP t, (* Dude, I *love* this shit. *)
+                 [ X.INSN (X.AL, X.MOVLIT (X.TEMP t2, Word.fromInt (0x10000 - (n - 4 + 1)))),
+                   X.INSN (X.AL, X.ADD (X.TEMP t2, X.REG X.SP)),
+                   X.INSN (X.AL, X.STO (X.TEMP t2, X.TEMP t)) ] )
+              end
 
           val dests = List.tabulate (nargs, fn x => argdest (x+1))
           val hf = List.map hasfixed l
@@ -98,11 +107,12 @@ struct
             (fn (t,exp) => munch_exp (X.TEMP t) exp)
             (ListPair.zip (temps, l_hf))
           val argpushes = List.map
-            (fn (dest, t) => [X.INSN (X.AL, 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)
+            (fn ((d,_),exp) => munch_exp d exp)
             (ListPair.zip (d_nohf, l_nohf))
+          val shittodo = List.concat (List.map (fn (_, shit) => shit) (d_hf @ d_nohf))
           
           val t_stackb = Temp.new ("stackb")
           val t_target = Temp.new ("target")
@@ -110,12 +120,18 @@ struct
           List.concat argevals_hf @ 
           List.concat argpushes @
           List.concat argevals_nohf @
-          [ 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))]
+          shittodo @
+          (if stackb > 0
+           then [ 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))]
+           else [ X.INSN (X.AL, X.MOVSYM (X.TEMP t_target, name)),
+                  X.INSN (X.AL, X.CALL (X.REG X.SP, X.TEMP t_target, nargs)),
+                  X.INSN (X.AL, X.MOV (d, X.REG X.R0))]
+          )
         end
     (*| 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