f5168e47a8
* libgfortran.h (support_fpu_underflow_control,
get_fpu_underflow_mode, set_fpu_underflow_mode): New prototypes.
* config/fpu-*.h (support_fpu_underflow_control,
get_fpu_underflow_mode, set_fpu_underflow_mode):
New functions.
* ieee/ieee_arithmetic.F90: Support underflow control.
* gfortran.dg/ieee/underflow_1.f90: New file.
From-SVN: r212407
873 lines
24 KiB
Fortran
873 lines
24 KiB
Fortran
! Implementation of the IEEE_ARITHMETIC standard intrinsic module
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! Copyright (C) 2013 Free Software Foundation, Inc.
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! Contributed by Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
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!
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! This file is part of the GNU Fortran runtime library (libgfortran).
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!
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! Libgfortran is free software; you can redistribute it and/or
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! modify it under the terms of the GNU General Public
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! License as published by the Free Software Foundation; either
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! version 3 of the License, or (at your option) any later version.
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!
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! Libgfortran is distributed in the hope that it will be useful,
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! but WITHOUT ANY WARRANTY; without even the implied warranty of
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! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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! GNU General Public License for more details.
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!
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! Under Section 7 of GPL version 3, you are granted additional
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! permissions described in the GCC Runtime Library Exception, version
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! 3.1, as published by the Free Software Foundation.
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!
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! You should have received a copy of the GNU General Public License and
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! a copy of the GCC Runtime Library Exception along with this program;
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! see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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! <http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "kinds.inc"
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#include "c99_protos.inc"
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#include "fpu-target.inc"
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module IEEE_ARITHMETIC
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use IEEE_EXCEPTIONS
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implicit none
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private
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! Every public symbol from IEEE_EXCEPTIONS must be made public here
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public :: IEEE_FLAG_TYPE, IEEE_INVALID, IEEE_OVERFLOW, &
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IEEE_DIVIDE_BY_ZERO, IEEE_UNDERFLOW, IEEE_INEXACT, IEEE_USUAL, &
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IEEE_ALL, IEEE_STATUS_TYPE, IEEE_GET_FLAG, IEEE_GET_HALTING_MODE, &
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IEEE_GET_STATUS, IEEE_SET_FLAG, IEEE_SET_HALTING_MODE, &
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IEEE_SET_STATUS, IEEE_SUPPORT_FLAG, IEEE_SUPPORT_HALTING
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! Derived types and named constants
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type, public :: IEEE_CLASS_TYPE
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private
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integer :: hidden
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end type
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type(IEEE_CLASS_TYPE), parameter, public :: &
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IEEE_OTHER_VALUE = IEEE_CLASS_TYPE(0), &
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IEEE_SIGNALING_NAN = IEEE_CLASS_TYPE(1), &
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IEEE_QUIET_NAN = IEEE_CLASS_TYPE(2), &
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IEEE_NEGATIVE_INF = IEEE_CLASS_TYPE(3), &
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IEEE_NEGATIVE_NORMAL = IEEE_CLASS_TYPE(4), &
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IEEE_NEGATIVE_DENORMAL = IEEE_CLASS_TYPE(5), &
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IEEE_NEGATIVE_ZERO = IEEE_CLASS_TYPE(6), &
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IEEE_POSITIVE_ZERO = IEEE_CLASS_TYPE(7), &
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IEEE_POSITIVE_DENORMAL = IEEE_CLASS_TYPE(8), &
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IEEE_POSITIVE_NORMAL = IEEE_CLASS_TYPE(9), &
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IEEE_POSITIVE_INF = IEEE_CLASS_TYPE(10)
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type, public :: IEEE_ROUND_TYPE
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private
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integer :: hidden
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end type
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type(IEEE_ROUND_TYPE), parameter, public :: &
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IEEE_NEAREST = IEEE_ROUND_TYPE(GFC_FPE_TONEAREST), &
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IEEE_TO_ZERO = IEEE_ROUND_TYPE(GFC_FPE_TOWARDZERO), &
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IEEE_UP = IEEE_ROUND_TYPE(GFC_FPE_UPWARD), &
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IEEE_DOWN = IEEE_ROUND_TYPE(GFC_FPE_DOWNWARD), &
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IEEE_OTHER = IEEE_ROUND_TYPE(0)
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! Equality operators on the derived types
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interface operator (==)
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module procedure IEEE_CLASS_TYPE_EQ, IEEE_ROUND_TYPE_EQ
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end interface
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public :: operator(==)
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interface operator (/=)
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module procedure IEEE_CLASS_TYPE_NE, IEEE_ROUND_TYPE_NE
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end interface
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public :: operator (/=)
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! IEEE_IS_FINITE
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interface
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elemental logical function _gfortran_ieee_is_finite_4(X)
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real(kind=4), intent(in) :: X
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end function
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elemental logical function _gfortran_ieee_is_finite_8(X)
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real(kind=8), intent(in) :: X
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end function
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end interface
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interface IEEE_IS_FINITE
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procedure _gfortran_ieee_is_finite_4, _gfortran_ieee_is_finite_8
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end interface
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public :: IEEE_IS_FINITE
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! IEEE_IS_NAN
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interface
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elemental logical function _gfortran_ieee_is_nan_4(X)
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real(kind=4), intent(in) :: X
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end function
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elemental logical function _gfortran_ieee_is_nan_8(X)
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real(kind=8), intent(in) :: X
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end function
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end interface
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interface IEEE_IS_NAN
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procedure _gfortran_ieee_is_nan_4, _gfortran_ieee_is_nan_8
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end interface
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public :: IEEE_IS_NAN
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! IEEE_IS_NEGATIVE
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interface
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elemental logical function _gfortran_ieee_is_negative_4(X)
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real(kind=4), intent(in) :: X
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end function
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elemental logical function _gfortran_ieee_is_negative_8(X)
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real(kind=8), intent(in) :: X
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end function
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end interface
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interface IEEE_IS_NEGATIVE
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procedure _gfortran_ieee_is_negative_4, _gfortran_ieee_is_negative_8
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end interface
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public :: IEEE_IS_NEGATIVE
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! IEEE_IS_NORMAL
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interface
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elemental logical function _gfortran_ieee_is_normal_4(X)
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real(kind=4), intent(in) :: X
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end function
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elemental logical function _gfortran_ieee_is_normal_8(X)
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real(kind=8), intent(in) :: X
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end function
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end interface
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interface IEEE_IS_NORMAL
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procedure _gfortran_ieee_is_normal_4, _gfortran_ieee_is_normal_8
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end interface
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public :: IEEE_IS_NORMAL
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! IEEE_COPY_SIGN
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interface
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elemental real(kind=4) function _gfortran_ieee_copy_sign_4_4 (X,Y)
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real(kind=4), intent(in) :: X
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real(kind=4), intent(in) :: Y
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end function
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elemental real(kind=4) function _gfortran_ieee_copy_sign_4_8 (X,Y)
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real(kind=4), intent(in) :: X
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real(kind=8), intent(in) :: Y
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end function
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elemental real(kind=8) function _gfortran_ieee_copy_sign_8_4 (X,Y)
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real(kind=8), intent(in) :: X
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real(kind=4), intent(in) :: Y
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end function
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elemental real(kind=8) function _gfortran_ieee_copy_sign_8_8 (X,Y)
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real(kind=8), intent(in) :: X
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real(kind=8), intent(in) :: Y
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end function
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end interface
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interface IEEE_COPY_SIGN
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procedure _gfortran_ieee_copy_sign_4_4, _gfortran_ieee_copy_sign_4_8, &
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_gfortran_ieee_copy_sign_8_4, _gfortran_ieee_copy_sign_8_8
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end interface
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public :: IEEE_COPY_SIGN
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! IEEE_UNORDERED
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interface
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elemental logical function _gfortran_ieee_unordered_4_4 (X,Y)
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real(kind=4), intent(in) :: X
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real(kind=4), intent(in) :: Y
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end function
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elemental logical function _gfortran_ieee_unordered_4_8 (X,Y)
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real(kind=4), intent(in) :: X
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real(kind=8), intent(in) :: Y
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end function
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elemental logical function _gfortran_ieee_unordered_8_4 (X,Y)
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real(kind=8), intent(in) :: X
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real(kind=4), intent(in) :: Y
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end function
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elemental logical function _gfortran_ieee_unordered_8_8 (X,Y)
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real(kind=8), intent(in) :: X
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real(kind=8), intent(in) :: Y
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end function
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end interface
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interface IEEE_UNORDERED
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procedure _gfortran_ieee_unordered_4_4, _gfortran_ieee_unordered_4_8, &
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_gfortran_ieee_unordered_8_4, _gfortran_ieee_unordered_8_8
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end interface
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public :: IEEE_UNORDERED
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! IEEE_LOGB
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interface
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elemental real(kind=4) function _gfortran_ieee_logb_4 (X)
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real(kind=4), intent(in) :: X
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end function
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elemental real(kind=8) function _gfortran_ieee_logb_8 (X)
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real(kind=8), intent(in) :: X
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end function
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end interface
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interface IEEE_LOGB
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procedure _gfortran_ieee_logb_4, _gfortran_ieee_logb_8
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end interface
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public :: IEEE_LOGB
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! IEEE_NEXT_AFTER
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interface
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elemental real(kind=4) function _gfortran_ieee_next_after_4_4 (X, Y)
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real(kind=4), intent(in) :: X
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real(kind=4), intent(in) :: Y
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end function
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elemental real(kind=4) function _gfortran_ieee_next_after_4_8 (X, Y)
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real(kind=4), intent(in) :: X
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real(kind=8), intent(in) :: Y
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end function
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elemental real(kind=8) function _gfortran_ieee_next_after_8_4 (X, Y)
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real(kind=8), intent(in) :: X
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real(kind=4), intent(in) :: Y
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end function
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elemental real(kind=8) function _gfortran_ieee_next_after_8_8 (X, Y)
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real(kind=8), intent(in) :: X
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real(kind=8), intent(in) :: Y
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end function
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end interface
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interface IEEE_NEXT_AFTER
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procedure _gfortran_ieee_next_after_4_4, _gfortran_ieee_next_after_4_8, &
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_gfortran_ieee_next_after_8_4, _gfortran_ieee_next_after_8_8
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end interface
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public :: IEEE_NEXT_AFTER
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! IEEE_REM
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interface
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elemental real(kind=4) function _gfortran_ieee_rem_4_4 (X, Y)
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real(kind=4), intent(in) :: X
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real(kind=4), intent(in) :: Y
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end function
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elemental real(kind=8) function _gfortran_ieee_rem_4_8 (X, Y)
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real(kind=4), intent(in) :: X
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real(kind=8), intent(in) :: Y
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end function
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elemental real(kind=8) function _gfortran_ieee_rem_8_4 (X, Y)
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real(kind=8), intent(in) :: X
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real(kind=4), intent(in) :: Y
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end function
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elemental real(kind=8) function _gfortran_ieee_rem_8_8 (X, Y)
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real(kind=8), intent(in) :: X
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real(kind=8), intent(in) :: Y
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end function
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end interface
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interface IEEE_REM
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procedure _gfortran_ieee_rem_4_4, _gfortran_ieee_rem_4_8, &
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_gfortran_ieee_rem_8_4, _gfortran_ieee_rem_8_8
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end interface
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public :: IEEE_REM
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! IEEE_RINT
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interface
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elemental real(kind=4) function _gfortran_ieee_rint_4 (X)
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real(kind=4), intent(in) :: X
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end function
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elemental real(kind=8) function _gfortran_ieee_rint_8 (X)
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real(kind=8), intent(in) :: X
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end function
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end interface
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interface IEEE_RINT
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procedure _gfortran_ieee_rint_4, _gfortran_ieee_rint_8
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end interface
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public :: IEEE_RINT
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! IEEE_SCALB
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interface
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elemental real(kind=4) function _gfortran_ieee_scalb_4 (X, I)
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real(kind=4), intent(in) :: X
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integer, intent(in) :: I
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end function
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elemental real(kind=8) function _gfortran_ieee_scalb_8 (X, I)
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real(kind=8), intent(in) :: X
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integer, intent(in) :: I
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end function
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end interface
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interface IEEE_SCALB
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procedure _gfortran_ieee_scalb_4, _gfortran_ieee_scalb_8
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end interface
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public :: IEEE_SCALB
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! IEEE_VALUE
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interface IEEE_VALUE
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module procedure IEEE_VALUE_4, IEEE_VALUE_8
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end interface
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public :: IEEE_VALUE
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! IEEE_CLASS
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interface IEEE_CLASS
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module procedure IEEE_CLASS_4, IEEE_CLASS_8
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end interface
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public :: IEEE_CLASS
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! Public declarations for contained procedures
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public :: IEEE_GET_ROUNDING_MODE, IEEE_SET_ROUNDING_MODE
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public :: IEEE_GET_UNDERFLOW_MODE, IEEE_SET_UNDERFLOW_MODE
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public :: IEEE_SELECTED_REAL_KIND
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! IEEE_SUPPORT_ROUNDING
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interface IEEE_SUPPORT_ROUNDING
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module procedure IEEE_SUPPORT_ROUNDING_4, IEEE_SUPPORT_ROUNDING_8, &
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#ifdef HAVE_GFC_REAL_10
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IEEE_SUPPORT_ROUNDING_10, &
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#endif
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#ifdef HAVE_GFC_REAL_16
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IEEE_SUPPORT_ROUNDING_16, &
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#endif
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IEEE_SUPPORT_ROUNDING_NOARG
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end interface
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public :: IEEE_SUPPORT_ROUNDING
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! Interface to the FPU-specific function
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interface
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pure integer function support_rounding_helper(flag) &
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bind(c, name="_gfortrani_support_fpu_rounding_mode")
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integer, intent(in), value :: flag
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end function
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end interface
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! IEEE_SUPPORT_UNDERFLOW_CONTROL
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interface IEEE_SUPPORT_UNDERFLOW_CONTROL
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module procedure IEEE_SUPPORT_UNDERFLOW_CONTROL_4, &
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IEEE_SUPPORT_UNDERFLOW_CONTROL_8, &
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#ifdef HAVE_GFC_REAL_10
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IEEE_SUPPORT_UNDERFLOW_CONTROL_10, &
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#endif
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#ifdef HAVE_GFC_REAL_16
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IEEE_SUPPORT_UNDERFLOW_CONTROL_16, &
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#endif
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IEEE_SUPPORT_UNDERFLOW_CONTROL_NOARG
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end interface
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public :: IEEE_SUPPORT_UNDERFLOW_CONTROL
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! Interface to the FPU-specific function
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interface
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pure integer function support_underflow_control_helper(kind) &
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bind(c, name="_gfortrani_support_fpu_underflow_control")
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integer, intent(in), value :: kind
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end function
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end interface
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! IEEE_SUPPORT_* generic functions
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#if defined(HAVE_GFC_REAL_10) && defined(HAVE_GFC_REAL_16)
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# define MACRO1(NAME) NAME/**/_4, NAME/**/_8, NAME/**/_10, NAME/**/_16, NAME/**/_NOARG
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#elif defined(HAVE_GFC_REAL_10)
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# define MACRO1(NAME) NAME/**/_4, NAME/**/_8, NAME/**/_10, NAME/**/_NOARG
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#elif defined(HAVE_GFC_REAL_16)
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# define MACRO1(NAME) NAME/**/_4, NAME/**/_8, NAME/**/_16, NAME/**/_NOARG
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#else
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# define MACRO1(NAME) NAME/**/_4, NAME/**/_8, NAME/**/_NOARG
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#endif
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#define SUPPORTGENERIC(NAME) \
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interface NAME ; module procedure MACRO1(NAME) ; end interface ; \
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public :: NAME
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SUPPORTGENERIC(IEEE_SUPPORT_DATATYPE)
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SUPPORTGENERIC(IEEE_SUPPORT_DENORMAL)
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SUPPORTGENERIC(IEEE_SUPPORT_DIVIDE)
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SUPPORTGENERIC(IEEE_SUPPORT_INF)
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SUPPORTGENERIC(IEEE_SUPPORT_IO)
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SUPPORTGENERIC(IEEE_SUPPORT_NAN)
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SUPPORTGENERIC(IEEE_SUPPORT_SQRT)
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SUPPORTGENERIC(IEEE_SUPPORT_STANDARD)
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contains
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! Equality operators for IEEE_CLASS_TYPE and IEEE_ROUNDING_MODE
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elemental logical function IEEE_CLASS_TYPE_EQ (X, Y) result(res)
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implicit none
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type(IEEE_CLASS_TYPE), intent(in) :: X, Y
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res = (X%hidden == Y%hidden)
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end function
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elemental logical function IEEE_CLASS_TYPE_NE (X, Y) result(res)
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implicit none
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type(IEEE_CLASS_TYPE), intent(in) :: X, Y
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res = (X%hidden /= Y%hidden)
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end function
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elemental logical function IEEE_ROUND_TYPE_EQ (X, Y) result(res)
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implicit none
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type(IEEE_ROUND_TYPE), intent(in) :: X, Y
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res = (X%hidden == Y%hidden)
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end function
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elemental logical function IEEE_ROUND_TYPE_NE (X, Y) result(res)
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implicit none
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type(IEEE_ROUND_TYPE), intent(in) :: X, Y
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res = (X%hidden /= Y%hidden)
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end function
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! IEEE_SELECTED_REAL_KIND
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integer function IEEE_SELECTED_REAL_KIND (P, R, RADIX) result(res)
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implicit none
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integer, intent(in), optional :: P, R, RADIX
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integer :: p2, r2
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p2 = 0 ; r2 = 0
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if (present(p)) p2 = p
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if (present(r)) r2 = r
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! The only IEEE types we support right now are binary
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if (present(radix)) then
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if (radix /= 2) then
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res = -5
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return
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endif
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endif
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! Does IEEE float fit?
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if (precision(0.) >= p2 .and. range(0.) >= r2) then
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res = kind(0.)
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return
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endif
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! Does IEEE double fit?
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if (precision(0.d0) >= p2 .and. range(0.d0) >= r2) then
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res = kind(0.d0)
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return
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endif
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if (precision(0.d0) < p2 .and. range(0.d0) < r2) then
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res = -3
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return
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endif
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if (precision(0.d0) < p2) then
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res = -1
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return
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endif
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res = -2
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end function
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! IEEE_CLASS
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elemental function IEEE_CLASS_4 (X) result(res)
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implicit none
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real(kind=4), intent(in) :: X
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type(IEEE_CLASS_TYPE) :: res
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interface
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pure integer function _gfortrani_ieee_class_helper_4(val)
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real(kind=4), intent(in) :: val
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end function
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end interface
|
|
|
|
res = IEEE_CLASS_TYPE(_gfortrani_ieee_class_helper_4(X))
|
|
end function
|
|
|
|
elemental function IEEE_CLASS_8 (X) result(res)
|
|
implicit none
|
|
real(kind=8), intent(in) :: X
|
|
type(IEEE_CLASS_TYPE) :: res
|
|
|
|
interface
|
|
pure integer function _gfortrani_ieee_class_helper_8(val)
|
|
real(kind=8), intent(in) :: val
|
|
end function
|
|
end interface
|
|
|
|
res = IEEE_CLASS_TYPE(_gfortrani_ieee_class_helper_8(X))
|
|
end function
|
|
|
|
! IEEE_VALUE
|
|
|
|
elemental real(kind=4) function IEEE_VALUE_4(X, C) result(res)
|
|
implicit none
|
|
real(kind=4), intent(in) :: X
|
|
type(IEEE_CLASS_TYPE), intent(in) :: C
|
|
|
|
select case (C%hidden)
|
|
case (1) ! IEEE_SIGNALING_NAN
|
|
res = -1
|
|
res = sqrt(res)
|
|
case (2) ! IEEE_QUIET_NAN
|
|
res = -1
|
|
res = sqrt(res)
|
|
case (3) ! IEEE_NEGATIVE_INF
|
|
res = huge(res)
|
|
res = (-res) * res
|
|
case (4) ! IEEE_NEGATIVE_NORMAL
|
|
res = -42
|
|
case (5) ! IEEE_NEGATIVE_DENORMAL
|
|
res = -tiny(res)
|
|
res = res / 2
|
|
case (6) ! IEEE_NEGATIVE_ZERO
|
|
res = 0
|
|
res = -res
|
|
case (7) ! IEEE_POSITIVE_ZERO
|
|
res = 0
|
|
case (8) ! IEEE_POSITIVE_DENORMAL
|
|
res = tiny(res)
|
|
res = res / 2
|
|
case (9) ! IEEE_POSITIVE_NORMAL
|
|
res = 42
|
|
case (10) ! IEEE_POSITIVE_INF
|
|
res = huge(res)
|
|
res = res * res
|
|
case default ! IEEE_OTHER_VALUE, should not happen
|
|
res = 0
|
|
end select
|
|
end function
|
|
|
|
elemental real(kind=8) function IEEE_VALUE_8(X, C) result(res)
|
|
implicit none
|
|
real(kind=8), intent(in) :: X
|
|
type(IEEE_CLASS_TYPE), intent(in) :: C
|
|
|
|
select case (C%hidden)
|
|
case (1) ! IEEE_SIGNALING_NAN
|
|
res = -1
|
|
res = sqrt(res)
|
|
case (2) ! IEEE_QUIET_NAN
|
|
res = -1
|
|
res = sqrt(res)
|
|
case (3) ! IEEE_NEGATIVE_INF
|
|
res = huge(res)
|
|
res = (-res) * res
|
|
case (4) ! IEEE_NEGATIVE_NORMAL
|
|
res = -42
|
|
case (5) ! IEEE_NEGATIVE_DENORMAL
|
|
res = -tiny(res)
|
|
res = res / 2
|
|
case (6) ! IEEE_NEGATIVE_ZERO
|
|
res = 0
|
|
res = -res
|
|
case (7) ! IEEE_POSITIVE_ZERO
|
|
res = 0
|
|
case (8) ! IEEE_POSITIVE_DENORMAL
|
|
res = tiny(res)
|
|
res = res / 2
|
|
case (9) ! IEEE_POSITIVE_NORMAL
|
|
res = 42
|
|
case (10) ! IEEE_POSITIVE_INF
|
|
res = huge(res)
|
|
res = res * res
|
|
case default ! IEEE_OTHER_VALUE, should not happen
|
|
res = 0
|
|
end select
|
|
end function
|
|
|
|
|
|
! IEEE_GET_ROUNDING_MODE
|
|
|
|
subroutine IEEE_GET_ROUNDING_MODE (ROUND_VALUE)
|
|
implicit none
|
|
type(IEEE_ROUND_TYPE), intent(out) :: ROUND_VALUE
|
|
|
|
interface
|
|
integer function helper() &
|
|
bind(c, name="_gfortrani_get_fpu_rounding_mode")
|
|
end function
|
|
end interface
|
|
|
|
ROUND_VALUE = IEEE_ROUND_TYPE(helper())
|
|
end subroutine
|
|
|
|
|
|
! IEEE_SET_ROUNDING_MODE
|
|
|
|
subroutine IEEE_SET_ROUNDING_MODE (ROUND_VALUE)
|
|
implicit none
|
|
type(IEEE_ROUND_TYPE), intent(in) :: ROUND_VALUE
|
|
|
|
interface
|
|
subroutine helper(val) &
|
|
bind(c, name="_gfortrani_set_fpu_rounding_mode")
|
|
integer, value :: val
|
|
end subroutine
|
|
end interface
|
|
|
|
call helper(ROUND_VALUE%hidden)
|
|
end subroutine
|
|
|
|
|
|
! IEEE_GET_UNDERFLOW_MODE
|
|
|
|
subroutine IEEE_GET_UNDERFLOW_MODE (GRADUAL)
|
|
implicit none
|
|
logical, intent(out) :: GRADUAL
|
|
|
|
interface
|
|
integer function helper() &
|
|
bind(c, name="_gfortrani_get_fpu_underflow_mode")
|
|
end function
|
|
end interface
|
|
|
|
GRADUAL = (helper() /= 0)
|
|
end subroutine
|
|
|
|
|
|
! IEEE_SET_UNDERFLOW_MODE
|
|
|
|
subroutine IEEE_SET_UNDERFLOW_MODE (GRADUAL)
|
|
implicit none
|
|
logical, intent(in) :: GRADUAL
|
|
|
|
interface
|
|
subroutine helper(val) &
|
|
bind(c, name="_gfortrani_set_fpu_underflow_mode")
|
|
integer, value :: val
|
|
end subroutine
|
|
end interface
|
|
|
|
call helper(merge(1, 0, GRADUAL))
|
|
end subroutine
|
|
|
|
! IEEE_SUPPORT_ROUNDING
|
|
|
|
pure logical function IEEE_SUPPORT_ROUNDING_4 (ROUND_VALUE, X) result(res)
|
|
implicit none
|
|
real(kind=4), intent(in) :: X
|
|
type(IEEE_ROUND_TYPE), intent(in) :: ROUND_VALUE
|
|
res = (support_rounding_helper(ROUND_VALUE%hidden) /= 0)
|
|
end function
|
|
|
|
pure logical function IEEE_SUPPORT_ROUNDING_8 (ROUND_VALUE, X) result(res)
|
|
implicit none
|
|
real(kind=8), intent(in) :: X
|
|
type(IEEE_ROUND_TYPE), intent(in) :: ROUND_VALUE
|
|
res = (support_rounding_helper(ROUND_VALUE%hidden) /= 0)
|
|
end function
|
|
|
|
#ifdef HAVE_GFC_REAL_10
|
|
pure logical function IEEE_SUPPORT_ROUNDING_10 (ROUND_VALUE, X) result(res)
|
|
implicit none
|
|
real(kind=10), intent(in) :: X
|
|
type(IEEE_ROUND_TYPE), intent(in) :: ROUND_VALUE
|
|
res = .false.
|
|
end function
|
|
#endif
|
|
|
|
#ifdef HAVE_GFC_REAL_16
|
|
pure logical function IEEE_SUPPORT_ROUNDING_16 (ROUND_VALUE, X) result(res)
|
|
implicit none
|
|
real(kind=16), intent(in) :: X
|
|
type(IEEE_ROUND_TYPE), intent(in) :: ROUND_VALUE
|
|
res = .false.
|
|
end function
|
|
#endif
|
|
|
|
pure logical function IEEE_SUPPORT_ROUNDING_NOARG (ROUND_VALUE) result(res)
|
|
implicit none
|
|
type(IEEE_ROUND_TYPE), intent(in) :: ROUND_VALUE
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
res = .false.
|
|
#else
|
|
res = (support_rounding_helper(ROUND_VALUE%hidden) /= 0)
|
|
#endif
|
|
end function
|
|
|
|
! IEEE_SUPPORT_UNDERFLOW_CONTROL
|
|
|
|
pure logical function IEEE_SUPPORT_UNDERFLOW_CONTROL_4 (X) result(res)
|
|
implicit none
|
|
real(kind=4), intent(in) :: X
|
|
res = (support_underflow_control_helper(4) /= 0)
|
|
end function
|
|
|
|
pure logical function IEEE_SUPPORT_UNDERFLOW_CONTROL_8 (X) result(res)
|
|
implicit none
|
|
real(kind=8), intent(in) :: X
|
|
res = (support_underflow_control_helper(8) /= 0)
|
|
end function
|
|
|
|
#ifdef HAVE_GFC_REAL_10
|
|
pure logical function IEEE_SUPPORT_UNDERFLOW_CONTROL_10 (X) result(res)
|
|
implicit none
|
|
real(kind=10), intent(in) :: X
|
|
res = .false.
|
|
end function
|
|
#endif
|
|
|
|
#ifdef HAVE_GFC_REAL_16
|
|
pure logical function IEEE_SUPPORT_UNDERFLOW_CONTROL_16 (X) result(res)
|
|
implicit none
|
|
real(kind=16), intent(in) :: X
|
|
res = .false.
|
|
end function
|
|
#endif
|
|
|
|
pure logical function IEEE_SUPPORT_UNDERFLOW_CONTROL_NOARG () result(res)
|
|
implicit none
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
res = .false.
|
|
#else
|
|
res = (support_underflow_control_helper(4) /= 0 &
|
|
.and. support_underflow_control_helper(8) /= 0)
|
|
#endif
|
|
end function
|
|
|
|
! IEEE_SUPPORT_* functions
|
|
|
|
#define SUPPORTMACRO(NAME, INTKIND, VALUE) \
|
|
pure logical function NAME/**/_/**/INTKIND (X) result(res) ; \
|
|
implicit none ; \
|
|
real(INTKIND), intent(in) :: X(..) ; \
|
|
res = VALUE ; \
|
|
end function
|
|
|
|
#define SUPPORTMACRO_NOARG(NAME, VALUE) \
|
|
pure logical function NAME/**/_NOARG () result(res) ; \
|
|
implicit none ; \
|
|
res = VALUE ; \
|
|
end function
|
|
|
|
! IEEE_SUPPORT_DATATYPE
|
|
|
|
SUPPORTMACRO(IEEE_SUPPORT_DATATYPE,4,.true.)
|
|
SUPPORTMACRO(IEEE_SUPPORT_DATATYPE,8,.true.)
|
|
#ifdef HAVE_GFC_REAL_10
|
|
SUPPORTMACRO(IEEE_SUPPORT_DATATYPE,10,.false.)
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
SUPPORTMACRO(IEEE_SUPPORT_DATATYPE,16,.false.)
|
|
#endif
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_DATATYPE,.false.)
|
|
#else
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_DATATYPE,.true.)
|
|
#endif
|
|
|
|
! IEEE_SUPPORT_DENORMAL
|
|
|
|
SUPPORTMACRO(IEEE_SUPPORT_DENORMAL,4,.true.)
|
|
SUPPORTMACRO(IEEE_SUPPORT_DENORMAL,8,.true.)
|
|
#ifdef HAVE_GFC_REAL_10
|
|
SUPPORTMACRO(IEEE_SUPPORT_DENORMAL,10,.false.)
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
SUPPORTMACRO(IEEE_SUPPORT_DENORMAL,16,.false.)
|
|
#endif
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_DENORMAL,.false.)
|
|
#else
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_DENORMAL,.true.)
|
|
#endif
|
|
|
|
! IEEE_SUPPORT_DIVIDE
|
|
|
|
SUPPORTMACRO(IEEE_SUPPORT_DIVIDE,4,.true.)
|
|
SUPPORTMACRO(IEEE_SUPPORT_DIVIDE,8,.true.)
|
|
#ifdef HAVE_GFC_REAL_10
|
|
SUPPORTMACRO(IEEE_SUPPORT_DIVIDE,10,.false.)
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
SUPPORTMACRO(IEEE_SUPPORT_DIVIDE,16,.false.)
|
|
#endif
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_DIVIDE,.false.)
|
|
#else
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_DIVIDE,.true.)
|
|
#endif
|
|
|
|
! IEEE_SUPPORT_INF
|
|
|
|
SUPPORTMACRO(IEEE_SUPPORT_INF,4,.true.)
|
|
SUPPORTMACRO(IEEE_SUPPORT_INF,8,.true.)
|
|
#ifdef HAVE_GFC_REAL_10
|
|
SUPPORTMACRO(IEEE_SUPPORT_INF,10,.false.)
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
SUPPORTMACRO(IEEE_SUPPORT_INF,16,.false.)
|
|
#endif
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_INF,.false.)
|
|
#else
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_INF,.true.)
|
|
#endif
|
|
|
|
! IEEE_SUPPORT_IO
|
|
|
|
SUPPORTMACRO(IEEE_SUPPORT_IO,4,.true.)
|
|
SUPPORTMACRO(IEEE_SUPPORT_IO,8,.true.)
|
|
#ifdef HAVE_GFC_REAL_10
|
|
SUPPORTMACRO(IEEE_SUPPORT_IO,10,.false.)
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
SUPPORTMACRO(IEEE_SUPPORT_IO,16,.false.)
|
|
#endif
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_IO,.false.)
|
|
#else
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_IO,.true.)
|
|
#endif
|
|
|
|
! IEEE_SUPPORT_NAN
|
|
|
|
SUPPORTMACRO(IEEE_SUPPORT_NAN,4,.true.)
|
|
SUPPORTMACRO(IEEE_SUPPORT_NAN,8,.true.)
|
|
#ifdef HAVE_GFC_REAL_10
|
|
SUPPORTMACRO(IEEE_SUPPORT_NAN,10,.false.)
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
SUPPORTMACRO(IEEE_SUPPORT_NAN,16,.false.)
|
|
#endif
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_NAN,.false.)
|
|
#else
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_NAN,.true.)
|
|
#endif
|
|
|
|
! IEEE_SUPPORT_SQRT
|
|
|
|
SUPPORTMACRO(IEEE_SUPPORT_SQRT,4,.true.)
|
|
SUPPORTMACRO(IEEE_SUPPORT_SQRT,8,.true.)
|
|
#ifdef HAVE_GFC_REAL_10
|
|
SUPPORTMACRO(IEEE_SUPPORT_SQRT,10,.false.)
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
SUPPORTMACRO(IEEE_SUPPORT_SQRT,16,.false.)
|
|
#endif
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_SQRT,.false.)
|
|
#else
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_SQRT,.true.)
|
|
#endif
|
|
|
|
! IEEE_SUPPORT_STANDARD
|
|
|
|
SUPPORTMACRO(IEEE_SUPPORT_STANDARD,4,.true.)
|
|
SUPPORTMACRO(IEEE_SUPPORT_STANDARD,8,.true.)
|
|
#ifdef HAVE_GFC_REAL_10
|
|
SUPPORTMACRO(IEEE_SUPPORT_STANDARD,10,.false.)
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
SUPPORTMACRO(IEEE_SUPPORT_STANDARD,16,.false.)
|
|
#endif
|
|
#if defined(HAVE_GFC_REAL_10) || defined(HAVE_GFC_REAL_16)
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_STANDARD,.false.)
|
|
#else
|
|
SUPPORTMACRO_NOARG(IEEE_SUPPORT_STANDARD,.true.)
|
|
#endif
|
|
|
|
end module IEEE_ARITHMETIC
|