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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
include Float64_common
external mul : float -> float -> float = "coq_fmul_byte" "coq_fmul"
[@@unboxed] [@@noalloc]
external add : float -> float -> float = "coq_fadd_byte" "coq_fadd"
[@@unboxed] [@@noalloc]
external sub : float -> float -> float = "coq_fsub_byte" "coq_fsub"
[@@unboxed] [@@noalloc]
external div : float -> float -> float = "coq_fdiv_byte" "coq_fdiv"
[@@unboxed] [@@noalloc]
external sqrt : float -> float = "coq_fsqrt_byte" "coq_fsqrt"
[@@unboxed] [@@noalloc]
(*** Test at runtime that no harmful double rounding seems to
be performed with an intermediate 80 bits representation (x87). *)
let () =
let b = ldexp 1. 53 in
let s = add 1. (ldexp 1. (-52)) in
if add b s <= b || add b 1. <> b || ldexp 1. (-1074) <= 0. then
failwith "Detected non IEEE-754 compliant architecture (or wrong \
rounding mode). Use of Float is thus unsafe."
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