diff options
Diffstat (limited to 'mppa_k1c/Archi.v')
| -rw-r--r-- | mppa_k1c/Archi.v | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/mppa_k1c/Archi.v b/mppa_k1c/Archi.v index 113f5d51..800c9fe5 100644 --- a/mppa_k1c/Archi.v +++ b/mppa_k1c/Archi.v @@ -16,7 +16,7 @@ (** Architecture-dependent parameters for RISC-V *) -Require Import ZArith. +Require Import ZArith List. (*From Flocq*) Require Import Binary Bits. @@ -34,6 +34,8 @@ Proof. unfold splitlong. destruct ptr64; simpl; congruence. Qed. +(** THIS IS NOT CHECKED ! NONE OF THIS ! *) + (** Section 7.3: "Except when otherwise stated, if the result of a floating-point operation is NaN, it is the canonical NaN. The canonical NaN has a positive sign and all significand bits clear @@ -41,26 +43,36 @@ Qed. We need to extend the [choose_binop_pl] functions to account for this case. *) -Definition default_nan_64 : { x : binary64 | is_nan _ _ x = true } := - exist _ (B754_nan 53 1024 true (iter_nat 51 _ xO xH) (eq_refl true)) (eq_refl true). +Definition default_nan_64 := (false, iter_nat 51 _ xO xH). +Definition default_nan_32 := (false, iter_nat 22 _ xO xH). -Definition choose_binop_pl_64 (pl1 pl2 : positive) := - false. (**r always choose first NaN *) +(* Always choose the first NaN argument, if any *) -Definition default_nan_32 : { x : binary32 | is_nan _ _ x = true } := - exist _ (B754_nan 24 128 true (iter_nat 22 _ xO xH) (eq_refl true)) (eq_refl true). +Definition choose_nan_64 (l: list (bool * positive)) : bool * positive := + match l with nil => default_nan_64 | n :: _ => n end. -Definition choose_binop_pl_32 (pl1 pl2 : positive) := - false. (**r always choose first NaN *) +Definition choose_nan_32 (l: list (bool * positive)) : bool * positive := + match l with nil => default_nan_32 | n :: _ => n end. -(* TODO check *) Definition fpu_returns_default_qNaN := false. +Lemma choose_nan_64_idem: forall n, + choose_nan_64 (n :: n :: nil) = choose_nan_64 (n :: nil). +Proof. auto. Qed. + +Lemma choose_nan_32_idem: forall n, + choose_nan_32 (n :: n :: nil) = choose_nan_32 (n :: nil). +Proof. auto. Qed. + +Definition fma_order {A: Type} (x y z: A) := (x, z, y). + +Definition fma_invalid_mul_is_nan := false. Definition float_of_single_preserves_sNaN := false. Global Opaque ptr64 big_endian splitlong - default_nan_64 choose_binop_pl_64 - default_nan_32 choose_binop_pl_32 + default_nan_64 choose_nan_64 + default_nan_32 choose_nan_32 + fma_order fma_invalid_mul_is_nan float_of_single_preserves_sNaN. (** Whether to generate position-independent code or not *) |