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(* LowShort.def provides access to limits of the gm2 SHORTREAL.
Copyright (C) 2010-2025 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. *)
DEFINITION MODULE LowShort;
(* Access to underlying properties of the type SHORTREAL *)
CONST
radix = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, radix> )) ; (* ZType *)
places = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, places> )) ; (* ZType *)
expoMin = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, expoMin> )) ; (* ZType *)
expoMax = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, expoMax> )) ; (* ZType *)
large = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, large> )) ; (* RType *)
small = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, small> )) ; (* RType *)
IEC559 = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, IEC559> )) ; (* BOOLEAN *)
LIA1 = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, LIA1> )) ; (* BOOLEAN *)
ISO = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, ISO> )) ; (* BOOLEAN *)
IEEE = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, IEEE> )) ; (* BOOLEAN *)
rounds = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, rounds> )) ; (* BOOLEAN *)
gUnderflow = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, gUnderflow> )) ; (* BOOLEAN *)
exception = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, exception> )) ; (* BOOLEAN *)
extend = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, extend> )) ; (* BOOLEAN *)
nModes = __ATTRIBUTE__ __BUILTIN__ (( <SHORTREAL, nModes> )) ; (* ZType *)
TYPE
Modes = PACKEDSET OF [0 .. nModes-1];
PROCEDURE exponent (x: SHORTREAL): INTEGER;
(* Returns the exponent value of x *)
PROCEDURE fraction (x: SHORTREAL): SHORTREAL;
(* Returns the significand (or significant part) of x *)
PROCEDURE sign (x: SHORTREAL): SHORTREAL;
(* Returns the signum of x *)
PROCEDURE succ (x: SHORTREAL): SHORTREAL;
(* Returns the next value of the type SHORTREAL greater than x *)
PROCEDURE ulp (x: SHORTREAL): SHORTREAL;
(* Returns the value of a unit in the last place of x *)
PROCEDURE pred (x: SHORTREAL): SHORTREAL;
(* Returns the previous value of the type SHORTREAL less than x *)
PROCEDURE intpart (x: SHORTREAL): SHORTREAL;
(* Returns the integer part of x *)
PROCEDURE fractpart (x: SHORTREAL): SHORTREAL;
(* Returns the fractional part of x *)
PROCEDURE scale (x: SHORTREAL; n: INTEGER): SHORTREAL;
(* Returns the value of x * radix ** n *)
PROCEDURE trunc (x: SHORTREAL; n: INTEGER): SHORTREAL;
(* Returns the value of the first n places of x *)
PROCEDURE round (x: SHORTREAL; n: INTEGER): SHORTREAL;
(* Returns the value of x rounded to the first n places *)
PROCEDURE synthesize (expart: INTEGER; frapart: SHORTREAL): SHORTREAL;
(* Returns a value of the type SHORTREAL constructed from the given expart and frapart *)
PROCEDURE setMode (m: Modes);
(* Sets status flags appropriate to the underlying implementation of the type SHORTREAL *)
PROCEDURE currentMode (): Modes;
(* Returns the current status flags in the form set by setMode *)
PROCEDURE IsLowException (): BOOLEAN;
(* Returns TRUE if the current coroutine is in the exceptional execution state
because of the raising of an exception in a routine from this module; otherwise
returns FALSE.
*)
END LowShort.
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