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(* *********************************************************************)
(* *)
(* The Compcert verified compiler *)
(* *)
(* Xavier Leroy, INRIA Paris *)
(* *)
(* Copyright Institut National de Recherche en Informatique et en *)
(* Automatique. All rights reserved. This file is distributed *)
(* under the terms of the INRIA Non-Commercial License Agreement. *)
(* *)
(* *********************************************************************)
(** Instruction selection for 64-bit integer operations *)
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.
Nondetfunction notl (e: expr) :=
if Archi.splitlong then SplitLong.notl e else
match e with
| Eop (Olongconst n) Enil => longconst (Int64.not n)
| Eop Onotl (t1:::Enil) => t1
| _ => Eop Onotl (e:::Enil)
end.
Nondetfunction 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 e2 with
| Eop (Olongconst n2) Enil =>
longconst (Int64.and n1 n2)
| Eop (Oandlimm n2) (t2:::Enil) =>
Eop (Oandlimm (Int64.and n1 n2)) (t2:::Enil)
| _ =>
Eop (Oandlimm n1) (e2:::Enil)
end.
Nondetfunction andl (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.andl e1 e2 else
match e1, e2 with
| Eop (Olongconst n1) Enil, t2 => andlimm n1 t2
| t1, Eop (Olongconst n2) Enil => andlimm n2 t1
| _, _ => Eop Oandl (e1:::e2:::Enil)
end.
Nondetfunction 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 e2 with
| Eop (Olongconst n2) Enil => longconst (Int64.or n1 n2)
| Eop (Oorlimm n2) (t2:::Enil) => Eop (Oorlimm (Int64.or n1 n2)) (t2:::Enil)
| _ => Eop (Oorlimm n1) (e2:::Enil)
end.
Nondetfunction orl (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.orl e1 e2 else
match e1, e2 with
| Eop (Olongconst n1) Enil, t2 => orlimm n1 t2
| t1, Eop (Olongconst n2) Enil => orlimm n2 t1
| Eop (Oshllimm n1) (t1:::Enil), Eop (Oshrluimm n2) (t2:::Enil) =>
if Int.eq (Int.add n1 n2) Int64.iwordsize' && same_expr_pure t1 t2
then Eop (Ororlimm n2) (t1:::Enil)
else Eop Oorl (e1:::e2:::Enil)
| Eop (Oshrluimm n2) (t2:::Enil), Eop (Oshllimm n1) (t1:::Enil) =>
if Int.eq (Int.add n1 n2) Int64.iwordsize' && same_expr_pure t1 t2
then Eop (Ororlimm n2) (t1:::Enil)
else Eop Oorl (e1:::e2:::Enil)
| _, _ =>
Eop Oorl (e1:::e2:::Enil)
end.
Nondetfunction 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 e2 with
| Eop (Olongconst n2) Enil => longconst (Int64.xor n1 n2)
| Eop (Oxorlimm n2) (t2:::Enil) => Eop (Oxorlimm (Int64.xor n1 n2)) (t2:::Enil)
| Eop Onotl (t2:::Enil) => Eop (Oxorlimm (Int64.not n1)) (t2:::Enil)
| _ => Eop (Oxorlimm n1) (e2:::Enil)
end.
Nondetfunction xorl (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.xorl e1 e2 else
match e1, e2 with
| Eop (Olongconst n1) Enil, t2 => xorlimm n1 t2
| t1, Eop (Olongconst n2) Enil => xorlimm n2 t1
| _, _ => Eop Oxorl (e1:::e2:::Enil)
end.
Nondetfunction 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
match e1 with
| Eop (Olongconst n1) Enil =>
Eop (Olongconst(Int64.shl' n1 n)) Enil
| Eop (Oshllimm n1) (t1:::Enil) =>
if Int.ltu (Int.add n n1) Int64.iwordsize'
then Eop (Oshllimm (Int.add n n1)) (t1:::Enil)
else Eop (Oshllimm n) (e1:::Enil)
| Eop (Oleal (Aindexed n1)) (t1:::Enil) =>
if shift_is_scale n
then Eop (Oleal (Ascaled (Int64.unsigned (Int64.shl' Int64.one n))
(Int64.unsigned (Int64.shl' (Int64.repr n1) n)))) (t1:::Enil)
else Eop (Oshllimm n) (e1:::Enil)
| _ =>
if shift_is_scale n
then Eop (Oleal (Ascaled (Int64.unsigned (Int64.shl' Int64.one n)) 0)) (e1:::Enil)
else Eop (Oshllimm n) (e1:::Enil)
end.
Nondetfunction 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
match e1 with
| Eop (Olongconst n1) Enil =>
Eop (Olongconst(Int64.shru' n1 n)) Enil
| Eop (Oshrluimm n1) (t1:::Enil) =>
if Int.ltu (Int.add n n1) Int64.iwordsize'
then Eop (Oshrluimm (Int.add n n1)) (t1:::Enil)
else Eop (Oshrluimm n) (e1:::Enil)
| _ =>
Eop (Oshrluimm n) (e1:::Enil)
end.
Nondetfunction 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 e1 with
| Eop (Olongconst n1) Enil =>
Eop (Olongconst(Int64.shr' n1 n)) Enil
| Eop (Oshrlimm n1) (t1:::Enil) =>
if Int.ltu (Int.add n n1) Int64.iwordsize'
then Eop (Oshrlimm (Int.add n n1)) (t1:::Enil)
else Eop (Oshrlimm n) (e1:::Enil)
| _ =>
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.
Nondetfunction addlimm (n: int64) (e: expr) :=
if Int64.eq n Int64.zero then e else
match e with
| Eop (Olongconst m) Enil => longconst (Int64.add n m)
| Eop (Oleal addr) args => Eop (Oleal (offset_addressing_total addr (Int64.signed n))) args
| _ => Eop (Oleal (Aindexed (Int64.signed n))) (e ::: Enil)
end.
Nondetfunction addl (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.addl e1 e2 else
match e1, e2 with
| Eop (Olongconst n1) Enil, t2 => addlimm n1 t2
| t1, Eop (Olongconst n2) Enil => addlimm n2 t1
| Eop (Oleal (Aindexed n1)) (t1:::Enil), Eop (Oleal (Aindexed n2)) (t2:::Enil) =>
Eop (Oleal (Aindexed2 (n1 + n2))) (t1:::t2:::Enil)
| Eop (Oleal (Aindexed n1)) (t1:::Enil), Eop (Oleal (Ascaled sc n2)) (t2:::Enil) =>
Eop (Oleal (Aindexed2scaled sc (n1 + n2))) (t1:::t2:::Enil)
| Eop (Oleal (Ascaled sc n1)) (t1:::Enil), Eop (Oleal (Aindexed n2)) (t2:::Enil) =>
Eop (Oleal (Aindexed2scaled sc (n1 + n2))) (t2:::t1:::Enil)
| Eop (Oleal (Ascaled sc n)) (t1:::Enil), t2 =>
Eop (Oleal (Aindexed2scaled sc n)) (t2:::t1:::Enil)
| t1, Eop (Oleal (Ascaled sc n)) (t2:::Enil) =>
Eop (Oleal (Aindexed2scaled sc n)) (t1:::t2:::Enil)
| Eop (Oleal (Aindexed n)) (t1:::Enil), t2 =>
Eop (Oleal (Aindexed2 n)) (t1:::t2:::Enil)
| t1, Eop (Oleal (Aindexed n)) (t2:::Enil) =>
Eop (Oleal (Aindexed2 n)) (t1:::t2:::Enil)
| _, _ =>
Eop (Oleal (Aindexed2 0)) (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.
Nondetfunction subl (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.subl e1 e2 else
match e1, e2 with
| t1, Eop (Olongconst n2) Enil => addlimm (Int64.neg n2) t1
| Eop (Oleal (Aindexed n1)) (t1:::Enil), Eop (Oleal (Aindexed n2)) (t2:::Enil) =>
addlimm (Int64.repr (n1 - n2)) (Eop Osubl (t1:::t2:::Enil))
| Eop (Oleal (Aindexed n1)) (t1:::Enil), t2 =>
addlimm (Int64.repr n1) (Eop Osubl (t1:::t2:::Enil))
| t1, Eop (Oleal (Aindexed n2)) (t2:::Enil) =>
addlimm (Int64.repr (- n2)) (Eop Osubl (t1:::t2:::Enil))
| _, _ =>
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 (Omullimm n1) (e2:::Enil)
end.
Nondetfunction 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 e2 with
| Eop (Olongconst n2) Enil => longconst (Int64.mul n1 n2)
| Eop (Oleal (Aindexed n2)) (t2:::Enil) => addlimm (Int64.mul n1 (Int64.repr n2)) (mullimm_base n1 t2)
| _ => mullimm_base n1 e2
end.
Nondetfunction mull (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.mull e1 e2 else
match e1, e2 with
| Eop (Olongconst n1) Enil, t2 => mullimm n1 t2
| t1, Eop (Olongconst n2) Enil => mullimm n2 t1
| _, _ => 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 divlu_base (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.divlu_base e1 e2 else Eop Odivlu (e1:::e2:::Enil).
Definition modlu_base (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.modlu_base e1 e2 else Eop Omodlu (e1:::e2:::Enil).
Definition divls_base (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.divls_base e1 e2 else Eop Odivl (e1:::e2:::Enil).
Definition modls_base (e1: expr) (e2: expr) :=
if Archi.splitlong then SplitLong.modls_base e1 e2 else Eop Omodl (e1:::e2:::Enil).
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 (e: expr) :=
if Archi.splitlong then SplitLong.longofsingle e else
Eop Olongofsingle (e:::Enil).
Definition singleoflong (e: expr) :=
if Archi.splitlong then SplitLong.singleoflong e else
Eop Osingleoflong (e:::Enil).
End SELECT.
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