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108 lines
3.1 KiB
Coq
108 lines
3.1 KiB
Coq
Set Implicit Arguments.
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Require Export Shared.
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Require Flocq.Appli.Fappli_IEEE Flocq.Appli.Fappli_IEEE_bits.
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(**************************************************************)
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(** ** Type for number (IEEE floats) *)
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Definition number : Type :=
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Fappli_IEEE_bits.binary64.
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(**************************************************************)
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(** ** Particular values of numbers *)
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(* LATER: find definitions in Flocq *)
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Parameter nan : number.
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Parameter zero : number.
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Parameter neg_zero : number.
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Definition one := Fappli_IEEE.binary_normalize 53 1024 eq_refl eq_refl Fappli_IEEE.mode_NE 1 0 false.
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Parameter infinity : number.
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Parameter neg_infinity : number.
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Parameter max_value : number.
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Parameter min_value : number.
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Parameter pi : number.
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Parameter e : number.
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Parameter ln2 : number.
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(**************************************************************)
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(** ** Conversions on numbers *)
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(* LATER: implement definitions *)
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Parameter from_string : string -> number.
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Parameter to_string : number -> string.
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(**************************************************************)
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(** ** Unary operations on numbers *)
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(* LATER: find definitions in Flocq *)
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Parameter neg : number -> number.
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Parameter floor : number -> number.
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Parameter absolute : number -> number.
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Parameter sign : number -> number. (* returns arbitrary when x is zero or nan *)
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Parameter lt_bool : number -> number -> bool.
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(**************************************************************)
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(** ** Binary operations on numbers *)
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Definition add : number -> number -> number :=
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Fappli_IEEE_bits.b64_plus Fappli_IEEE.mode_NE.
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Parameter sub : number -> number -> number. (* todo: bind *)
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Parameter fmod : number -> number -> number. (* todo: bind *)
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Definition mult : number -> number -> number :=
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Fappli_IEEE_bits.b64_mult Fappli_IEEE.mode_NE.
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Definition div : number -> number -> number :=
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Fappli_IEEE_bits.b64_div Fappli_IEEE.mode_NE.
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(* Todo: find comparison operator *)
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Global Instance number_comparable : Comparable number.
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Proof. Admitted.
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(**************************************************************)
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(** ** Conversions with Int32 *)
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Parameter of_int : int -> number. (* LATER: this is quite complex. Should we make it precise? *)
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Parameter to_int32 : number -> int. (* Remark: extracted code could, for efficiency reasons, use Ocaml Int32 *)
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Parameter to_uint32 : number -> int.
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Parameter to_int16 : number -> int. (* currently not used *)
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(* LATER: Check that the OCaml extraction is correct. *)
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(**************************************************************)
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(** Implements the operation that masks all but the 5 least significant bits
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of a non-negative number (obtained as the result of to_uint32 *)
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Parameter modulo_32 : int -> int.
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(** Implements int32 operation *)
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Parameter int32_bitwise_not : int -> int.
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Parameter int32_bitwise_and : int -> int -> int.
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Parameter int32_bitwise_or : int -> int -> int.
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Parameter int32_bitwise_xor : int -> int -> int.
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Parameter int32_left_shift : int -> int -> int.
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Parameter int32_right_shift : int -> int -> int.
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Parameter uint32_right_shift : int -> int -> int.
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(**************************************************************)
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(** ** Int32 related conversion *)
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