243 lines
6.9 KiB
Fortran
243 lines
6.9 KiB
Fortran
! Implementation of the IEEE_EXCEPTIONS standard intrinsic module
|
|
! Copyright (C) 2013-2017 Free Software Foundation, Inc.
|
|
! Contributed by Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
|
|
!
|
|
! This file is part of the GNU Fortran runtime library (libgfortran).
|
|
!
|
|
! Libgfortran 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 of the License, or (at your option) any later version.
|
|
!
|
|
! Libgfortran 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/>. */
|
|
|
|
#include "config.h"
|
|
#include "kinds.inc"
|
|
#include "c99_protos.inc"
|
|
#include "fpu-target.inc"
|
|
|
|
module IEEE_EXCEPTIONS
|
|
|
|
implicit none
|
|
private
|
|
|
|
! Derived types and named constants
|
|
|
|
type, public :: IEEE_FLAG_TYPE
|
|
private
|
|
integer :: hidden
|
|
end type
|
|
|
|
type(IEEE_FLAG_TYPE), parameter, public :: &
|
|
IEEE_INVALID = IEEE_FLAG_TYPE(GFC_FPE_INVALID), &
|
|
IEEE_OVERFLOW = IEEE_FLAG_TYPE(GFC_FPE_OVERFLOW), &
|
|
IEEE_DIVIDE_BY_ZERO = IEEE_FLAG_TYPE(GFC_FPE_ZERO), &
|
|
IEEE_UNDERFLOW = IEEE_FLAG_TYPE(GFC_FPE_UNDERFLOW), &
|
|
IEEE_INEXACT = IEEE_FLAG_TYPE(GFC_FPE_INEXACT)
|
|
|
|
type(IEEE_FLAG_TYPE), parameter, public :: &
|
|
IEEE_USUAL(3) = [ IEEE_OVERFLOW, IEEE_DIVIDE_BY_ZERO, IEEE_INVALID ], &
|
|
IEEE_ALL(5) = [ IEEE_USUAL, IEEE_UNDERFLOW, IEEE_INEXACT ]
|
|
|
|
type, public :: IEEE_STATUS_TYPE
|
|
private
|
|
character(len=GFC_FPE_STATE_BUFFER_SIZE) :: hidden
|
|
end type
|
|
|
|
interface IEEE_SUPPORT_FLAG
|
|
module procedure IEEE_SUPPORT_FLAG_4, &
|
|
IEEE_SUPPORT_FLAG_8, &
|
|
#ifdef HAVE_GFC_REAL_10
|
|
IEEE_SUPPORT_FLAG_10, &
|
|
#endif
|
|
#ifdef HAVE_GFC_REAL_16
|
|
IEEE_SUPPORT_FLAG_16, &
|
|
#endif
|
|
IEEE_SUPPORT_FLAG_NOARG
|
|
end interface IEEE_SUPPORT_FLAG
|
|
|
|
public :: IEEE_SUPPORT_FLAG, IEEE_SUPPORT_HALTING
|
|
public :: IEEE_SET_HALTING_MODE, IEEE_GET_HALTING_MODE
|
|
public :: IEEE_SET_FLAG, IEEE_GET_FLAG
|
|
public :: IEEE_SET_STATUS, IEEE_GET_STATUS
|
|
|
|
contains
|
|
|
|
! Saving and restoring floating-point status
|
|
|
|
subroutine IEEE_GET_STATUS (STATUS_VALUE)
|
|
implicit none
|
|
type(IEEE_STATUS_TYPE), intent(out) :: STATUS_VALUE
|
|
|
|
interface
|
|
subroutine helper(ptr) &
|
|
bind(c, name="_gfortrani_get_fpu_state")
|
|
use, intrinsic :: iso_c_binding, only : c_char
|
|
character(kind=c_char) :: ptr(*)
|
|
end subroutine
|
|
end interface
|
|
|
|
call helper(STATUS_VALUE%hidden)
|
|
end subroutine
|
|
|
|
subroutine IEEE_SET_STATUS (STATUS_VALUE)
|
|
implicit none
|
|
type(IEEE_STATUS_TYPE), intent(in) :: STATUS_VALUE
|
|
|
|
interface
|
|
subroutine helper(ptr) &
|
|
bind(c, name="_gfortrani_set_fpu_state")
|
|
use, intrinsic :: iso_c_binding, only : c_char
|
|
character(kind=c_char) :: ptr(*)
|
|
end subroutine
|
|
end interface
|
|
|
|
call helper(STATUS_VALUE%hidden)
|
|
end subroutine
|
|
|
|
! Getting and setting flags
|
|
|
|
elemental subroutine IEEE_GET_FLAG (FLAG, FLAG_VALUE)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
logical, intent(out) :: FLAG_VALUE
|
|
|
|
interface
|
|
pure integer function helper() &
|
|
bind(c, name="_gfortrani_get_fpu_except_flags")
|
|
end function
|
|
end interface
|
|
|
|
FLAG_VALUE = (IAND(helper(), FLAG%hidden) /= 0)
|
|
end subroutine
|
|
|
|
elemental subroutine IEEE_SET_FLAG (FLAG, FLAG_VALUE)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
logical, intent(in) :: FLAG_VALUE
|
|
|
|
interface
|
|
pure subroutine helper(set, clear) &
|
|
bind(c, name="_gfortrani_set_fpu_except_flags")
|
|
integer, intent(in), value :: set, clear
|
|
end subroutine
|
|
end interface
|
|
|
|
if (FLAG_VALUE) then
|
|
call helper(FLAG%hidden, 0)
|
|
else
|
|
call helper(0, FLAG%hidden)
|
|
end if
|
|
end subroutine
|
|
|
|
! Querying and changing the halting mode
|
|
|
|
elemental subroutine IEEE_GET_HALTING_MODE (FLAG, HALTING)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
logical, intent(out) :: HALTING
|
|
|
|
interface
|
|
pure integer function helper() &
|
|
bind(c, name="_gfortrani_get_fpu_trap_exceptions")
|
|
end function
|
|
end interface
|
|
|
|
HALTING = (IAND(helper(), FLAG%hidden) /= 0)
|
|
end subroutine
|
|
|
|
elemental subroutine IEEE_SET_HALTING_MODE (FLAG, HALTING)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
logical, intent(in) :: HALTING
|
|
|
|
interface
|
|
pure subroutine helper(trap, notrap) &
|
|
bind(c, name="_gfortrani_set_fpu_trap_exceptions")
|
|
integer, intent(in), value :: trap, notrap
|
|
end subroutine
|
|
end interface
|
|
|
|
if (HALTING) then
|
|
call helper(FLAG%hidden, 0)
|
|
else
|
|
call helper(0, FLAG%hidden)
|
|
end if
|
|
end subroutine
|
|
|
|
! Querying support
|
|
|
|
pure logical function IEEE_SUPPORT_HALTING (FLAG)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
|
|
interface
|
|
pure integer function helper(flag) &
|
|
bind(c, name="_gfortrani_support_fpu_trap")
|
|
integer, intent(in), value :: flag
|
|
end function
|
|
end interface
|
|
|
|
IEEE_SUPPORT_HALTING = (helper(FLAG%hidden) /= 0)
|
|
end function
|
|
|
|
pure logical function IEEE_SUPPORT_FLAG_NOARG (FLAG)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
|
|
interface
|
|
pure integer function helper(flag) &
|
|
bind(c, name="_gfortrani_support_fpu_flag")
|
|
integer, intent(in), value :: flag
|
|
end function
|
|
end interface
|
|
|
|
IEEE_SUPPORT_FLAG_NOARG = (helper(FLAG%hidden) /= 0)
|
|
end function
|
|
|
|
pure logical function IEEE_SUPPORT_FLAG_4 (FLAG, X) result(res)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
real(kind=4), intent(in) :: X
|
|
res = IEEE_SUPPORT_FLAG_NOARG(FLAG)
|
|
end function
|
|
|
|
pure logical function IEEE_SUPPORT_FLAG_8 (FLAG, X) result(res)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
real(kind=8), intent(in) :: X
|
|
res = IEEE_SUPPORT_FLAG_NOARG(FLAG)
|
|
end function
|
|
|
|
#ifdef HAVE_GFC_REAL_10
|
|
pure logical function IEEE_SUPPORT_FLAG_10 (FLAG, X) result(res)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
real(kind=10), intent(in) :: X
|
|
res = IEEE_SUPPORT_FLAG_NOARG(FLAG)
|
|
end function
|
|
#endif
|
|
|
|
#ifdef HAVE_GFC_REAL_16
|
|
pure logical function IEEE_SUPPORT_FLAG_16 (FLAG, X) result(res)
|
|
implicit none
|
|
type(IEEE_FLAG_TYPE), intent(in) :: FLAG
|
|
real(kind=16), intent(in) :: X
|
|
res = IEEE_SUPPORT_FLAG_NOARG(FLAG)
|
|
end function
|
|
#endif
|
|
|
|
end module IEEE_EXCEPTIONS
|