diff options
Diffstat (limited to 'arm/Archi.v')
| -rw-r--r-- | arm/Archi.v | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/arm/Archi.v b/arm/Archi.v index 353731e0..39a424ec 100644 --- a/arm/Archi.v +++ b/arm/Archi.v @@ -17,8 +17,8 @@ (** Architecture-dependent parameters for ARM *) Require Import ZArith. -Require Import Fappli_IEEE. -Require Import Fappli_IEEE_bits. +(*From Flocq*) +Require Import Binary Bits. Definition ptr64 := false. @@ -34,29 +34,30 @@ Proof. unfold splitlong, ptr64; congruence. Qed. -Program Definition default_pl_64 : bool * nan_pl 53 := - (false, iter_nat 51 _ xO xH). +Definition default_nan_64 : { x : binary64 | is_nan _ _ x = true } := + exist _ (B754_nan 53 1024 false (iter_nat 51 _ xO xH) (eq_refl true)) (eq_refl true). -Definition choose_binop_pl_64 (s1: bool) (pl1: nan_pl 53) (s2: bool) (pl2: nan_pl 53) := +Definition choose_binop_pl_64 (pl1 pl2 : positive) := (** Choose second NaN if pl2 is sNaN but pl1 is qNan. In all other cases, choose first NaN *) - (Pos.testbit (proj1_sig pl1) 51 && - negb (Pos.testbit (proj1_sig pl2) 51))%bool. + (Pos.testbit pl1 51 && negb (Pos.testbit pl2 51))%bool. -Program Definition default_pl_32 : bool * nan_pl 24 := - (false, iter_nat 22 _ xO xH). +Definition default_nan_32 : { x : binary32 | is_nan _ _ x = true } := + exist _ (B754_nan 24 128 false (iter_nat 22 _ xO xH) (eq_refl true)) (eq_refl true). -Definition choose_binop_pl_32 (s1: bool) (pl1: nan_pl 24) (s2: bool) (pl2: nan_pl 24) := +Definition choose_binop_pl_32 (pl1 pl2 : positive) := (** Choose second NaN if pl2 is sNaN but pl1 is qNan. In all other cases, choose first NaN *) - (Pos.testbit (proj1_sig pl1) 22 && - negb (Pos.testbit (proj1_sig pl2) 22))%bool. + (Pos.testbit pl1 22 && negb (Pos.testbit pl2 22))%bool. + +Definition fpu_returns_default_qNaN := false. Definition float_of_single_preserves_sNaN := false. Global Opaque ptr64 big_endian splitlong - default_pl_64 choose_binop_pl_64 - default_pl_32 choose_binop_pl_32 + default_nan_64 choose_binop_pl_64 + default_nan_32 choose_binop_pl_32 + fpu_returns_default_qNaN float_of_single_preserves_sNaN. (** Which ABI to use: either the standard ARM EABI with floats passed |