Module SelectLong

Require Import Coqlib.
Require Import Compopts.
Require Import AST Integers Floats.
Require Import Op CminorSel.
Require Import SelectOp SplitLong.

Local Open Scope cminorsel_scope.
Local Open Scope string_scope.

Section SELECT.

Context {hf: helper_functions}.

Definition longconst (n: int64) : expr :=
  if Archi.splitlong then SplitLong.longconst n else Eop (Olongconst n) Enil.

Definition is_longconst (e: expr) :=
  if Archi.splitlong then SplitLong.is_longconst e else
  match e with
  | Eop (Olongconst n) Enil => Some n
  | _ => None
  end.

Definition intoflong (e: expr) :=
  if Archi.splitlong then SplitLong.intoflong e else
  match is_longconst e with
  | Some n => Eop (Ointconst (Int.repr (Int64.unsigned n))) Enil
  | None => Eop Olowlong (e ::: Enil)
  end.

Definition longofint (e: expr) :=
  if Archi.splitlong then SplitLong.longofint e else
  match is_intconst e with
  | Some n => longconst (Int64.repr (Int.signed n))
  | None => Eop Ocast32signed (e ::: Enil)
  end.

Definition longofintu (e: expr) :=
  if Archi.splitlong then SplitLong.longofintu e else
  match is_intconst e with
  | Some n => longconst (Int64.repr (Int.unsigned n))
  | None => Eop Ocast32unsigned (e ::: Enil)
  end.


Inductive notl_cases: forall (e: expr), Type :=
  | notl_case1: forall n, notl_cases (Eop (Olongconst n) Enil)
  | notl_case2: forall t1, notl_cases (Eop Onotl (t1:::Enil))
  | notl_default: forall (e: expr), notl_cases e.

Definition notl_match (e: expr) :=
  match e as zz1 return notl_cases zz1 with
  | Eop (Olongconst n) Enil => notl_case1 n
  | Eop Onotl (t1:::Enil) => notl_case2 t1
  | e => notl_default e
  end.

Definition notl (e: expr) :=
 if Archi.splitlong then SplitLong.notl e else match notl_match e with
  | notl_case1 n =>
      longconst (Int64.not n)
  | notl_case2 t1 =>
      t1
  | notl_default e =>
      Eop Onotl (e:::Enil)
  end.



Inductive andlimm_cases: forall (e2: expr), Type :=
  | andlimm_case1: forall n2, andlimm_cases (Eop (Olongconst n2) Enil)
  | andlimm_case2: forall n2 t2, andlimm_cases (Eop (Oandlimm n2) (t2:::Enil))
  | andlimm_case3: forall amount2 mask2 t2, andlimm_cases (Eop (Orolml amount2 mask2) (t2:::Enil))
  | andlimm_default: forall (e2: expr), andlimm_cases e2.

Definition andlimm_match (e2: expr) :=
  match e2 as zz1 return andlimm_cases zz1 with
  | Eop (Olongconst n2) Enil => andlimm_case1 n2
  | Eop (Oandlimm n2) (t2:::Enil) => andlimm_case2 n2 t2
  | Eop (Orolml amount2 mask2) (t2:::Enil) => andlimm_case3 amount2 mask2 t2
  | e2 => andlimm_default e2
  end.

Definition andlimm (n1: int64) (e2: expr) :=
 if Int64.eq n1 Int64.zero then longconst Int64.zero else if Int64.eq n1 Int64.mone then e2 else match andlimm_match e2 with
  | andlimm_case1 n2 =>
      longconst (Int64.and n1 n2)
  | andlimm_case2 n2 t2 =>
      Eop (Oandlimm (Int64.and n1 n2)) (t2:::Enil)
  | andlimm_case3 amount2 mask2 t2 =>
      Eop (Orolml amount2 (Int64.and n1 mask2)) (t2:::Enil)
  | andlimm_default e2 =>
      Eop (Oandlimm n1) (e2:::Enil)
  end.



Inductive andl_cases: forall (e1: expr) (e2: expr), Type :=
  | andl_case1: forall n1 t2, andl_cases (Eop (Olongconst n1) Enil) (t2)
  | andl_case2: forall t1 n2, andl_cases (t1) (Eop (Olongconst n2) Enil)
  | andl_default: forall (e1: expr) (e2: expr), andl_cases e1 e2.

Definition andl_match (e1: expr) (e2: expr) :=
  match e1 as zz1, e2 as zz2 return andl_cases zz1 zz2 with
  | Eop (Olongconst n1) Enil, t2 => andl_case1 n1 t2
  | t1, Eop (Olongconst n2) Enil => andl_case2 t1 n2
  | e1, e2 => andl_default e1 e2
  end.

Definition andl (e1: expr) (e2: expr) :=
 if Archi.splitlong then SplitLong.andl e1 e2 else match andl_match e1 e2 with
  | andl_case1 n1 t2 =>
      andlimm n1 t2
  | andl_case2 t1 n2 =>
      andlimm n2 t1
  | andl_default e1 e2 =>
      Eop Oandl (e1:::e2:::Enil)
  end.



Inductive orlimm_cases: forall (e2: expr), Type :=
  | orlimm_case1: forall n2, orlimm_cases (Eop (Olongconst n2) Enil)
  | orlimm_case2: forall n2 t2, orlimm_cases (Eop (Oorlimm n2) (t2:::Enil))
  | orlimm_default: forall (e2: expr), orlimm_cases e2.

Definition orlimm_match (e2: expr) :=
  match e2 as zz1 return orlimm_cases zz1 with
  | Eop (Olongconst n2) Enil => orlimm_case1 n2
  | Eop (Oorlimm n2) (t2:::Enil) => orlimm_case2 n2 t2
  | e2 => orlimm_default e2
  end.

Definition orlimm (n1: int64) (e2: expr) :=
 if Int64.eq n1 Int64.zero then e2 else if Int64.eq n1 Int64.mone then longconst Int64.mone else match orlimm_match e2 with
  | orlimm_case1 n2 =>
      longconst (Int64.or n1 n2)
  | orlimm_case2 n2 t2 =>
      Eop (Oorlimm (Int64.or n1 n2)) (t2:::Enil)
  | orlimm_default e2 =>
      Eop (Oorlimm n1) (e2:::Enil)
  end.



Inductive orl_cases: forall (e1: expr) (e2: expr), Type :=
  | orl_case1: forall amount1 mask1 t1 amount2 mask2 t2, orl_cases (Eop (Orolml amount1 mask1) (t1:::Enil)) (Eop (Orolml amount2 mask2) (t2:::Enil))
  | orl_case2: forall n1 t2, orl_cases (Eop (Olongconst n1) Enil) (t2)
  | orl_case3: forall t1 n2, orl_cases (t1) (Eop (Olongconst n2) Enil)
  | orl_default: forall (e1: expr) (e2: expr), orl_cases e1 e2.

Definition orl_match (e1: expr) (e2: expr) :=
  match e1 as zz1, e2 as zz2 return orl_cases zz1 zz2 with
  | Eop (Orolml amount1 mask1) (t1:::Enil), Eop (Orolml amount2 mask2) (t2:::Enil) => orl_case1 amount1 mask1 t1 amount2 mask2 t2
  | Eop (Olongconst n1) Enil, t2 => orl_case2 n1 t2
  | t1, Eop (Olongconst n2) Enil => orl_case3 t1 n2
  | e1, e2 => orl_default e1 e2
  end.

Definition orl (e1: expr) (e2: expr) :=
 if Archi.splitlong then SplitLong.orl e1 e2 else match orl_match e1 e2 with
  | orl_case1 amount1 mask1 t1 amount2 mask2 t2 =>
      if Int.eq amount1 amount2 && same_expr_pure t1 t2 then Eop (Orolml amount1 (Int64.or mask1 mask2)) (t1:::Enil) else Eop Oorl (e1:::e2:::Enil)
  | orl_case2 n1 t2 =>
      orlimm n1 t2
  | orl_case3 t1 n2 =>
      orlimm n2 t1
  | orl_default e1 e2 =>
      Eop Oorl (e1:::e2:::Enil)
  end.



Inductive xorlimm_cases: forall (e2: expr), Type :=
  | xorlimm_case1: forall n2, xorlimm_cases (Eop (Olongconst n2) Enil)
  | xorlimm_case2: forall n2 t2, xorlimm_cases (Eop (Oxorlimm n2) (t2:::Enil))
  | xorlimm_case3: forall t2, xorlimm_cases (Eop Onotl (t2:::Enil))
  | xorlimm_default: forall (e2: expr), xorlimm_cases e2.

Definition xorlimm_match (e2: expr) :=
  match e2 as zz1 return xorlimm_cases zz1 with
  | Eop (Olongconst n2) Enil => xorlimm_case1 n2
  | Eop (Oxorlimm n2) (t2:::Enil) => xorlimm_case2 n2 t2
  | Eop Onotl (t2:::Enil) => xorlimm_case3 t2
  | e2 => xorlimm_default e2
  end.

Definition xorlimm (n1: int64) (e2: expr) :=
 if Int64.eq n1 Int64.zero then e2 else if Int64.eq n1 Int64.mone then notl e2 else match xorlimm_match e2 with
  | xorlimm_case1 n2 =>
      longconst (Int64.xor n1 n2)
  | xorlimm_case2 n2 t2 =>
      Eop (Oxorlimm (Int64.xor n1 n2)) (t2:::Enil)
  | xorlimm_case3 t2 =>
      Eop (Oxorlimm (Int64.not n1)) (t2:::Enil)
  | xorlimm_default e2 =>
      Eop (Oxorlimm n1) (e2:::Enil)
  end.



Inductive xorl_cases: forall (e1: expr) (e2: expr), Type :=
  | xorl_case1: forall n1 t2, xorl_cases (Eop (Olongconst n1) Enil) (t2)
  | xorl_case2: forall t1 n2, xorl_cases (t1) (Eop (Olongconst n2) Enil)
  | xorl_default: forall (e1: expr) (e2: expr), xorl_cases e1 e2.

Definition xorl_match (e1: expr) (e2: expr) :=
  match e1 as zz1, e2 as zz2 return xorl_cases zz1 zz2 with
  | Eop (Olongconst n1) Enil, t2 => xorl_case1 n1 t2
  | t1, Eop (Olongconst n2) Enil => xorl_case2 t1 n2
  | e1, e2 => xorl_default e1 e2
  end.

Definition xorl (e1: expr) (e2: expr) :=
 if Archi.splitlong then SplitLong.xorl e1 e2 else match xorl_match e1 e2 with
  | xorl_case1 n1 t2 =>
      xorlimm n1 t2
  | xorl_case2 t1 n2 =>
      xorlimm n2 t1
  | xorl_default e1 e2 =>
      Eop Oxorl (e1:::e2:::Enil)
  end.



Inductive rolml_cases: forall (e1: expr) , Type :=
  | rolml_case1: forall n1, rolml_cases (Eop (Olongconst n1) Enil)
  | rolml_case2: forall amount1 mask1 t1, rolml_cases (Eop (Orolml amount1 mask1) (t1:::Enil))
  | rolml_case3: forall mask1 t1, rolml_cases (Eop (Oandlimm mask1) (t1:::Enil))
  | rolml_default: forall (e1: expr) , rolml_cases e1.

Definition rolml_match (e1: expr) :=
  match e1 as zz1 return rolml_cases zz1 with
  | Eop (Olongconst n1) Enil => rolml_case1 n1
  | Eop (Orolml amount1 mask1) (t1:::Enil) => rolml_case2 amount1 mask1 t1
  | Eop (Oandlimm mask1) (t1:::Enil) => rolml_case3 mask1 t1
  | e1 => rolml_default e1
  end.

Definition rolml (e1: expr) (amount2: int) (mask2: int64) :=
 if Int.eq amount2 Int.zero then andlimm mask2 e1 else match rolml_match e1 with
  | rolml_case1 n1 =>
      longconst (Int64.and (Int64.rol' n1 amount2) mask2)
  | rolml_case2 amount1 mask1 t1 =>
      Eop (Orolml (Int.modu (Int.add amount1 amount2) Int64.iwordsize') (Int64.and (Int64.rol' mask1 amount2) mask2)) (t1:::Enil)
  | rolml_case3 mask1 t1 =>
      Eop (Orolml amount2 (Int64.and (Int64.rol' mask1 amount2) mask2)) (t1:::Enil)
  | rolml_default e1 =>
      Eop (Orolml amount2 mask2) (e1:::Enil)
  end.


Definition shllimm (e1: expr) (n: int) :=
  if Archi.splitlong then SplitLong.shllimm e1 n else
  if Int.eq n Int.zero then e1 else
  if negb (Int.ltu n Int64.iwordsize') then
    Eop Oshll (e1:::Eop (Ointconst n) Enil:::Enil)
  else
    let n' := Int64.repr (Int.unsigned n) in
    rolml e1 n (Int64.shl Int64.mone n').

Definition shrluimm (e1: expr) (n: int) :=
  if Archi.splitlong then SplitLong.shrluimm e1 n else
  if Int.eq n Int.zero then e1 else
  if negb (Int.ltu n Int64.iwordsize') then
    Eop Oshrlu (e1:::Eop (Ointconst n) Enil:::Enil)
  else
    let n' := Int64.repr (Int.unsigned n) in
    rolml e1 (Int.sub Int64.iwordsize' n) (Int64.shru Int64.mone n').


Inductive shrlimm_cases: forall (e1: expr) , Type :=
  | shrlimm_case1: forall n1, shrlimm_cases (Eop (Olongconst n1) Enil)
  | shrlimm_case2: forall n1 t1, shrlimm_cases (Eop (Oshrlimm n1) (t1:::Enil))
  | shrlimm_default: forall (e1: expr) , shrlimm_cases e1.

Definition shrlimm_match (e1: expr) :=
  match e1 as zz1 return shrlimm_cases zz1 with
  | Eop (Olongconst n1) Enil => shrlimm_case1 n1
  | Eop (Oshrlimm n1) (t1:::Enil) => shrlimm_case2 n1 t1
  | e1 => shrlimm_default e1
  end.

Definition shrlimm (e1: expr) (n: int) :=
 if Archi.splitlong then SplitLong.shrlimm e1 n else if Int.eq n Int.zero then e1 else if negb (Int.ltu n Int64.iwordsize') then Eop Oshrl (e1:::Eop (Ointconst n) Enil:::Enil) else match shrlimm_match e1 with
  | shrlimm_case1 n1 =>
      Eop (Olongconst(Int64.shr' n1 n)) Enil
  | shrlimm_case2 n1 t1 =>
      if Int.ltu (Int.add n n1) Int64.iwordsize' then Eop (Oshrlimm (Int.add n n1)) (t1:::Enil) else Eop (Oshrlimm n) (e1:::Enil)
  | shrlimm_default e1 =>
      Eop (Oshrlimm n) (e1:::Enil)
  end.


Definition shll (e1: expr) (e2: expr) :=
  if Archi.splitlong then SplitLong.shll e1 e2 else
  match is_intconst e2 with
  | Some n2 => shllimm e1 n2
  | None => Eop Oshll (e1:::e2:::Enil)
  end.

Definition shrl (e1: expr) (e2: expr) :=
  if Archi.splitlong then SplitLong.shrl e1 e2 else
  match is_intconst e2 with
  | Some n2 => shrlimm e1 n2
  | None => Eop Oshrl (e1:::e2:::Enil)
  end.

Definition shrlu (e1: expr) (e2: expr) :=
  if Archi.splitlong then SplitLong.shrlu e1 e2 else
  match is_intconst e2 with
  | Some n2 => shrluimm e1 n2
  | _ => Eop Oshrlu (e1:::e2:::Enil)
  end.


Inductive addlimm_cases: forall (e: expr), Type :=
  | addlimm_case1: forall m, addlimm_cases (Eop (Olongconst m) Enil)
  | addlimm_case2: forall m t, addlimm_cases (Eop (Oaddlimm m) (t ::: Enil))
  | addlimm_default: forall (e: expr), addlimm_cases e.

Definition addlimm_match (e: expr) :=
  match e as zz1 return addlimm_cases zz1 with
  | Eop (Olongconst m) Enil => addlimm_case1 m
  | Eop (Oaddlimm m) (t ::: Enil) => addlimm_case2 m t
  | e => addlimm_default e
  end.

Definition addlimm (n: int64) (e: expr) :=
 if Int64.eq n Int64.zero then e else match addlimm_match e with
  | addlimm_case1 m =>
      longconst (Int64.add m n)
  | addlimm_case2 m t =>
      Eop (Oaddlimm(Int64.add m n)) (t ::: Enil)
  | addlimm_default e =>
      Eop (Oaddlimm n) (e ::: Enil)
  end.



Inductive addl_cases: forall (e1: expr) (e2: expr), Type :=
  | addl_case1: forall n1 t2, addl_cases (Eop (Olongconst n1) Enil) (t2)
  | addl_case2: forall t1 n2, addl_cases (t1) (Eop (Olongconst n2) Enil)
  | addl_case3: forall n1 t1 n2 t2, addl_cases (Eop (Oaddlimm n1) (t1:::Enil)) (Eop (Oaddlimm n2) (t2:::Enil))
  | addl_case4: forall n1 t1 t2, addl_cases (Eop (Oaddlimm n1) (t1:::Enil)) (t2)
  | addl_case5: forall t1 n2 t2, addl_cases (t1) (Eop (Oaddlimm n2) (t2:::Enil))
  | addl_default: forall (e1: expr) (e2: expr), addl_cases e1 e2.

Definition addl_match (e1: expr) (e2: expr) :=
  match e1 as zz1, e2 as zz2 return addl_cases zz1 zz2 with
  | Eop (Olongconst n1) Enil, t2 => addl_case1 n1 t2
  | t1, Eop (Olongconst n2) Enil => addl_case2 t1 n2
  | Eop (Oaddlimm n1) (t1:::Enil), Eop (Oaddlimm n2) (t2:::Enil) => addl_case3 n1 t1 n2 t2
  | Eop (Oaddlimm n1) (t1:::Enil), t2 => addl_case4 n1 t1 t2
  | t1, Eop (Oaddlimm n2) (t2:::Enil) => addl_case5 t1 n2 t2
  | e1, e2 => addl_default e1 e2
  end.

Definition addl (e1: expr) (e2: expr) :=
 if Archi.splitlong then SplitLong.addl e1 e2 else match addl_match e1 e2 with
  | addl_case1 n1 t2 =>
      addlimm n1 t2
  | addl_case2 t1 n2 =>
      addlimm n2 t1
  | addl_case3 n1 t1 n2 t2 =>
      addlimm (Int64.add n1 n2) (Eop Oaddl (t1:::t2:::Enil))
  | addl_case4 n1 t1 t2 =>
      addlimm n1 (Eop Oaddl (t1:::t2:::Enil))
  | addl_case5 t1 n2 t2 =>
      addlimm n2 (Eop Oaddl (t1:::t2:::Enil))
  | addl_default e1 e2 =>
      Eop Oaddl (e1:::e2:::Enil)
  end.


Definition negl (e: expr) :=
  if Archi.splitlong then SplitLong.negl e else
  match is_longconst e with
  | Some n => longconst (Int64.neg n)
  | None => Eop Onegl (e ::: Enil)
  end.


Inductive subl_cases: forall (e1: expr) (e2: expr), Type :=
  | subl_case1: forall t1 n2, subl_cases (t1) (Eop (Olongconst n2) Enil)
  | subl_default: forall (e1: expr) (e2: expr), subl_cases e1 e2.

Definition subl_match (e1: expr) (e2: expr) :=
  match e1 as zz1, e2 as zz2 return subl_cases zz1 zz2 with
  | t1, Eop (Olongconst n2) Enil => subl_case1 t1 n2
  | e1, e2 => subl_default e1 e2
  end.

Definition subl (e1: expr) (e2: expr) :=
 if Archi.splitlong then SplitLong.subl e1 e2 else match subl_match e1 e2 with
  | subl_case1 t1 n2 =>
      addlimm (Int64.neg n2) t1
  | subl_default e1 e2 =>
      Eop Osubl (e1:::e2:::Enil)
  end.


Definition mullimm_base (n1: int64) (e2: expr) :=
  match Int64.one_bits' n1 with
  | i :: nil =>
      shllimm e2 i
  | i :: j :: nil =>
      Elet e2 (addl (shllimm (Eletvar 0) i) (shllimm (Eletvar 0) j))
  | _ =>
       Eop Omull (e2:::longconst n1:::Enil)
  end.


Inductive mullimm_cases: forall (e2: expr), Type :=
  | mullimm_case1: forall n2, mullimm_cases (Eop (Olongconst n2) Enil)
  | mullimm_default: forall (e2: expr), mullimm_cases e2.

Definition mullimm_match (e2: expr) :=
  match e2 as zz1 return mullimm_cases zz1 with
  | Eop (Olongconst n2) Enil => mullimm_case1 n2
  | e2 => mullimm_default e2
  end.

Definition mullimm (n1: int64) (e2: expr) :=
 if Archi.splitlong then SplitLong.mullimm n1 e2 else if Int64.eq n1 Int64.zero then longconst Int64.zero else if Int64.eq n1 Int64.one then e2 else match mullimm_match e2 with
  | mullimm_case1 n2 =>
      longconst (Int64.mul n1 n2)
  | mullimm_default e2 =>
      mullimm_base n1 e2
  end.



Inductive mull_cases: forall (e1: expr) (e2: expr), Type :=
  | mull_case1: forall n1 t2, mull_cases (Eop (Olongconst n1) Enil) (t2)
  | mull_case2: forall t1 n2, mull_cases (t1) (Eop (Olongconst n2) Enil)
  | mull_default: forall (e1: expr) (e2: expr), mull_cases e1 e2.

Definition mull_match (e1: expr) (e2: expr) :=
  match e1 as zz1, e2 as zz2 return mull_cases zz1 zz2 with
  | Eop (Olongconst n1) Enil, t2 => mull_case1 n1 t2
  | t1, Eop (Olongconst n2) Enil => mull_case2 t1 n2
  | e1, e2 => mull_default e1 e2
  end.

Definition mull (e1: expr) (e2: expr) :=
 if Archi.splitlong then SplitLong.mull e1 e2 else match mull_match e1 e2 with
  | mull_case1 n1 t2 =>
      mullimm n1 t2
  | mull_case2 t1 n2 =>
      mullimm n2 t1
  | mull_default e1 e2 =>
      Eop Omull (e1:::e2:::Enil)
  end.


Definition mullhu (e1: expr) (n2: int64) :=
  if Archi.splitlong then SplitLong.mullhu e1 n2 else
  Eop Omullhu (e1 ::: longconst n2 ::: Enil).

Definition mullhs (e1: expr) (n2: int64) :=
  if Archi.splitlong then SplitLong.mullhs e1 n2 else
  Eop Omullhs (e1 ::: longconst n2 ::: Enil).

Definition shrxlimm (e: expr) (n: int) :=
  if Archi.splitlong then SplitLong.shrxlimm e n else
  if Int.eq n Int.zero then e else Eop (Oshrxlimm n) (e ::: Enil).


Definition modl_aux (divop: operation) (e1 e2: expr) :=
  Elet e1
    (Elet (lift e2)
      (Eop Osubl (Eletvar 1 :::
                  Eop Omull (Eop divop (Eletvar 1 ::: Eletvar 0 ::: Enil) :::
                             Eletvar 0 :::
                             Enil) :::
                  Enil))).

Definition divls_base (e1: expr) (e2: expr) :=
  if Archi.splitlong then SplitLong.divls_base e1 e2 else Eop Odivl (e1:::e2:::Enil).

Definition divlu_base (e1: expr) (e2: expr) :=
  if Archi.splitlong then SplitLong.divlu_base e1 e2 else Eop Odivlu (e1:::e2:::Enil).

Definition modls_base (e1: expr) (e2: expr) :=
  if Archi.splitlong then SplitLong.modls_base e1 e2 else
  let default := modl_aux Odivl e1 e2 in
  match is_longconst e1, is_longconst e2 with
  | Some n1, Some n2 =>
      if Int64.eq Int64.zero n2 then default else
      if Int64.eq n1 (Int64.repr Int64.min_signed) && Int64.eq n2 Int64.mone then default
      else longconst (Int64.mods n1 n2)
  | _, _ => default
  end.

Definition modlu_base (e1 e2: expr) :=
  if Archi.splitlong then SplitLong.modlu_base e1 e2 else
  let default := modl_aux Odivlu e1 e2 in
  match is_longconst e1, is_longconst e2 with
  | Some n1, Some n2 =>
      if Int64.eq Int64.zero n2
      then default
      else longconst (Int64.modu n1 n2)
  | _, Some n2 =>
      match Int64.is_power2 n2 with
      | Some _ => andlimm (Int64.sub n2 Int64.one) e1
      | _ => default
      end
  | _, _ => default
  end.

Definition cmplu (c: comparison) (e1 e2: expr) :=
  if Archi.splitlong then SplitLong.cmplu c e1 e2 else
  match is_longconst e1, is_longconst e2 with
  | Some n1, Some n2 =>
      Eop (Ointconst (if Int64.cmpu c n1 n2 then Int.one else Int.zero)) Enil
  | Some n1, None => Eop (Ocmp (Ccompluimm (swap_comparison c) n1)) (e2:::Enil)
  | None, Some n2 => Eop (Ocmp (Ccompluimm c n2)) (e1:::Enil)
  | None, None => Eop (Ocmp (Ccomplu c)) (e1:::e2:::Enil)
  end.

Definition cmpl (c: comparison) (e1 e2: expr) :=
  if Archi.splitlong then SplitLong.cmpl c e1 e2 else
  match is_longconst e1, is_longconst e2 with
  | Some n1, Some n2 =>
      Eop (Ointconst (if Int64.cmp c n1 n2 then Int.one else Int.zero)) Enil
  | Some n1, None => Eop (Ocmp (Ccomplimm (swap_comparison c) n1)) (e2:::Enil)
  | None, Some n2 => Eop (Ocmp (Ccomplimm c n2)) (e1:::Enil)
  | None, None => Eop (Ocmp (Ccompl c)) (e1:::e2:::Enil)
  end.

Definition longoffloat (e: expr) :=
  if Archi.splitlong
  then SplitLong.longoffloat e
  else Eop Olongoffloat (e:::Enil).

Definition floatoflong (e: expr) :=
  if Archi.splitlong
  then SplitLong.floatoflong e
  else Eop Ofloatoflong (e:::Enil).

Definition longofsingle (arg: expr) :=
  longoffloat (floatofsingle arg).

End SELECT.