Section CONSTRUCTORS.
Variable ge: genv.
Variable fn: function.
(** Decomposition of integer literals *)
Inductive wf_decomposition: list (Z * Z) -> Prop :=
| wf_decomp_nil:
wf_decomposition nil
| wf_decomp_cons: forall m n p l,
n = Zzero_ext 16 m -> 0 <= p -> wf_decomposition l ->
wf_decomposition ((n, p) :: l).
Fixpoint recompose_int (accu: Z) (l: list (Z * Z)) : Z :=
match l with
| nil => accu
| (n, p) :: l => recompose_int (Zinsert accu n p 16) l
end.
(** Add immediate *)
(** Logical immediate *)
(** Load address of symbol *)
(** Shifted operands *)
Remark transl_shift_not_none:
forall s a, transl_shift s a <> SOnone.
Remark or_zero_eval_shift_op_int:
forall v s, s <> SOnone -> Val.or (Vint Int.zero) (eval_shift_op_int v s) = eval_shift_op_int v s.
Remark or_zero_eval_shift_op_long:
forall v s, s <> SOnone -> Val.orl (Vlong Int64.zero) (eval_shift_op_long v s) = eval_shift_op_long v s.
Remark add_zero_eval_shift_op_long:
forall v s, s <> SOnone -> Val.addl (Vlong Int64.zero) (eval_shift_op_long v s) = eval_shift_op_long v s.
(** Zero- and Sign- extensions *)
(** Extended right shift *)
(** Condition bits *)
Remark int64_sub_overflow:
forall x y,
Int.xor (Int.repr (Int64.unsigned (Int64.sub_overflow x y Int64.zero)))
(Int.repr (Int64.unsigned (Int64.negative (Int64.sub x y)))) =
(if Int64.lt x y then Int.one else Int.zero).

Lemma eval_testcond_compare_ulong: forall c v1 v2 b rs m,
Val.cmplu_bool (Mem.valid_pointer m) c v1 v2 = Some b ->
eval_testcond (cond_for_unsigned_cmp c) (compare_long rs v1 v2 m) = Some b.