Require Import Coqlib Floats Values Memory.
Require Import Integers.
Require Import Op Registers.
Require Import BTL_SEtheory.
Require Import BTL_SEsimuref.

(** Target op simplifications using "fake" values *)

Definition target_op_simplify (op: operation) (lr: list reg) (hrs: ristate): option sval :=
  None.

Definition target_cbranch_expanse (prev: ristate) (cond: condition) (args: list reg) : option (condition * list_sval) :=
  None.

(* Main proof of simplification *)

Lemma target_op_simplify_correct ctx op lr hrs fsv st args: forall
   (H: target_op_simplify op lr hrs = Some fsv)
   (REF: ris_refines ctx hrs st)
   (OK0: ris_ok ctx hrs)
   (OK1: eval_list_sval ctx (list_sval_inj (map (si_sreg st) lr)) = Some args),
   eval_sval ctx fsv = eval_operation (cge ctx) (csp ctx) op args (cm0 ctx).
Proof.
  unfold target_op_simplify; simpl.
  intros H ? ? ?.
  congruence.
Qed.

Lemma target_cbranch_expanse_correct hrs c l ctx st c' l': forall
  (TARGET: target_cbranch_expanse hrs c l = Some (c', l'))
  (REF: ris_refines ctx hrs st)
  (OK: ris_ok ctx hrs),
  eval_scondition ctx c' l' =
  eval_scondition ctx c (list_sval_inj (map (si_sreg st) l)).
Proof.
  unfold target_cbranch_expanse; simpl.
  intros H ? ?.
  congruence.
Qed.
Global Opaque target_op_simplify.
Global Opaque target_cbranch_expanse.