diff options
Diffstat (limited to 'mppa_k1c/Archi.v')
| -rw-r--r-- | mppa_k1c/Archi.v | 42 |
1 files changed, 28 insertions, 14 deletions
diff --git a/mppa_k1c/Archi.v b/mppa_k1c/Archi.v index bbe66c5b..69b32c7c 100644 --- a/mppa_k1c/Archi.v +++ b/mppa_k1c/Archi.v @@ -14,11 +14,10 @@ (* *) (* *********************************************************************) -(** Architecture-dependent parameters for RISC-V *) +(** Architecture-dependent parameters for MPPA K1c. Mostly copied from the Risc-V backend *) -Require Import ZArith. -Require Import Fappli_IEEE. -Require Import Fappli_IEEE_bits. +Require Import ZArith List. +Require Import Binary Bits. Definition ptr64 := true. @@ -34,6 +33,8 @@ 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 @@ -41,23 +42,36 @@ Qed. We need to extend the [choose_binop_pl] functions to account for this case. *) -Program Definition default_pl_64 : bool * nan_pl 53 := - (false, iter_nat 51 _ xO xH). +Definition default_nan_64 := (false, iter_nat 51 _ xO xH). +Definition default_nan_32 := (false, iter_nat 22 _ xO xH). + +(* Always choose the first NaN argument, if any *) + +Definition choose_nan_64 (l: list (bool * positive)) : bool * positive := + match l with nil => default_nan_64 | n :: _ => n end. + +Definition choose_nan_32 (l: list (bool * positive)) : bool * positive := + match l with nil => default_nan_32 | n :: _ => n end. + +Definition fpu_returns_default_qNaN := false. -Definition choose_binop_pl_64 (s1: bool) (pl1: nan_pl 53) (s2: bool) (pl2: nan_pl 53) := - false. (**r always choose first NaN *) +Lemma choose_nan_64_idem: forall n, + choose_nan_64 (n :: n :: nil) = choose_nan_64 (n :: nil). +Proof. auto. Qed. -Program Definition default_pl_32 : bool * nan_pl 24 := - (false, iter_nat 22 _ xO xH). +Lemma choose_nan_32_idem: forall n, + choose_nan_32 (n :: n :: nil) = choose_nan_32 (n :: nil). +Proof. auto. Qed. -Definition choose_binop_pl_32 (s1: bool) (pl1: nan_pl 24) (s2: bool) (pl2: nan_pl 24) := - false. (**r always choose first NaN *) +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_pl_64 choose_binop_pl_64 - default_pl_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 *) |