Module Archi


Architecture-dependent parameters for PowerPC

Require Import ZArith.
Require Import Fappli_IEEE.
Require Import Fappli_IEEE_bits.

Definition ptr64 := false.

Definition big_endian := true.

Definition align_int64 := 8%Z.
Definition align_float64 := 8%Z.

Can we use the 64-bit extensions to the PowerPC architecture?
Parameter ppc64 : bool.

Definition splitlong := negb ppc64.

Lemma splitlong_ptr32: splitlong = true -> ptr64 = false.
Proof.
  reflexivity.
Qed.

Program Definition default_pl_64 : bool * nan_pl 53 :=
  (false, iter_nat 51 _ xO xH).

Definition choose_binop_pl_64 (s1: bool) (pl1: nan_pl 53) (s2: bool) (pl2: nan_pl 53) :=
  false. (* always choose first NaN *)

Program Definition default_pl_32 : bool * nan_pl 24 :=
  (false, iter_nat 22 _ xO xH).

Definition choose_binop_pl_32 (s1: bool) (pl1: nan_pl 24) (s2: bool) (pl2: nan_pl 24) :=
  false. (* always choose first NaN *)

Definition float_of_single_preserves_sNaN := true.

Global Opaque ptr64 big_endian splitlong
              default_pl_64 choose_binop_pl_64
              default_pl_32 choose_binop_pl_32
              float_of_single_preserves_sNaN.