22a499884f
PR fortran/64022 * simplify.c (gfc_simplify_ieee_selected_real_kind): Extend IEEE support to all real kinds. * ieee/ieee_exceptions.F90: Support all real kinds. * ieee/ieee_arithmetic.F90: Likewise. * ieee/ieee_helper.c (ieee_class_helper_10, ieee_class_helper_16): New functions * gfortran.map (GFORTRAN_1.7): Add entries. * gfortran.dg/ieee/ieee_7.f90: Adjust test. * gfortran.dg/ieee/large_1.f90: New test. From-SVN: r226548
135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/* Helper functions in C for IEEE modules
|
|
Copyright (C) 2013-2015 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 "libgfortran.h"
|
|
|
|
/* Prototypes. */
|
|
|
|
extern int ieee_class_helper_4 (GFC_REAL_4 *);
|
|
internal_proto(ieee_class_helper_4);
|
|
|
|
extern int ieee_class_helper_8 (GFC_REAL_8 *);
|
|
internal_proto(ieee_class_helper_8);
|
|
|
|
#ifdef HAVE_GFC_REAL_10
|
|
extern int ieee_class_helper_10 (GFC_REAL_10 *);
|
|
internal_proto(ieee_class_helper_10);
|
|
#endif
|
|
|
|
#ifdef HAVE_GFC_REAL_16
|
|
extern int ieee_class_helper_16 (GFC_REAL_16 *);
|
|
internal_proto(ieee_class_helper_16);
|
|
#endif
|
|
|
|
/* Enumeration of the possible floating-point types. These values
|
|
correspond to the hidden arguments of the IEEE_CLASS_TYPE
|
|
derived-type of IEEE_ARITHMETIC. */
|
|
|
|
enum { IEEE_OTHER_VALUE = 0, IEEE_SIGNALING_NAN, IEEE_QUIET_NAN,
|
|
IEEE_NEGATIVE_INF, IEEE_NEGATIVE_NORMAL, IEEE_NEGATIVE_DENORMAL,
|
|
IEEE_NEGATIVE_ZERO, IEEE_POSITIVE_ZERO, IEEE_POSITIVE_DENORMAL,
|
|
IEEE_POSITIVE_NORMAL, IEEE_POSITIVE_INF };
|
|
|
|
#define CLASSMACRO(TYPE) \
|
|
int ieee_class_helper_ ## TYPE (GFC_REAL_ ## TYPE *value) \
|
|
{ \
|
|
int res = __builtin_fpclassify (IEEE_QUIET_NAN, IEEE_POSITIVE_INF, \
|
|
IEEE_POSITIVE_NORMAL, \
|
|
IEEE_POSITIVE_DENORMAL, \
|
|
IEEE_POSITIVE_ZERO, *value); \
|
|
\
|
|
if (__builtin_signbit (*value)) \
|
|
{ \
|
|
if (res == IEEE_POSITIVE_NORMAL) \
|
|
return IEEE_NEGATIVE_NORMAL; \
|
|
else if (res == IEEE_POSITIVE_DENORMAL) \
|
|
return IEEE_NEGATIVE_DENORMAL; \
|
|
else if (res == IEEE_POSITIVE_ZERO) \
|
|
return IEEE_NEGATIVE_ZERO; \
|
|
else if (res == IEEE_POSITIVE_INF) \
|
|
return IEEE_NEGATIVE_INF; \
|
|
} \
|
|
\
|
|
if (res == IEEE_QUIET_NAN) \
|
|
{ \
|
|
/* TODO: Handle signaling NaNs */ \
|
|
return res; \
|
|
} \
|
|
\
|
|
return res; \
|
|
}
|
|
|
|
CLASSMACRO(4)
|
|
CLASSMACRO(8)
|
|
|
|
#ifdef HAVE_GFC_REAL_10
|
|
CLASSMACRO(10)
|
|
#endif
|
|
|
|
#ifdef HAVE_GFC_REAL_16
|
|
CLASSMACRO(16)
|
|
#endif
|
|
|
|
|
|
#define GFC_FPE_ALL (GFC_FPE_INVALID | GFC_FPE_DENORMAL | \
|
|
GFC_FPE_ZERO | GFC_FPE_OVERFLOW | \
|
|
GFC_FPE_UNDERFLOW | GFC_FPE_INEXACT)
|
|
|
|
/* Functions to save and restore floating-point state, clear and restore
|
|
exceptions on procedure entry/exit. The rules we follow are set
|
|
in Fortran 2008's 14.3 paragraph 3, note 14.4, 14.4 paragraph 4,
|
|
14.5 paragraph 2, and 14.6 paragraph 1. */
|
|
|
|
void ieee_procedure_entry (void *);
|
|
export_proto(ieee_procedure_entry);
|
|
|
|
void
|
|
ieee_procedure_entry (void *state)
|
|
{
|
|
/* Save the floating-point state in the space provided by the caller. */
|
|
get_fpu_state (state);
|
|
|
|
/* Clear the floating-point exceptions. */
|
|
set_fpu_except_flags (0, GFC_FPE_ALL);
|
|
}
|
|
|
|
|
|
void ieee_procedure_exit (void *);
|
|
export_proto(ieee_procedure_exit);
|
|
|
|
void
|
|
ieee_procedure_exit (void *state)
|
|
{
|
|
/* Get the flags currently signaling. */
|
|
int flags = get_fpu_except_flags ();
|
|
|
|
/* Restore the floating-point state we had on entry. */
|
|
set_fpu_state (state);
|
|
|
|
/* And re-raised the flags that were raised since entry. */
|
|
set_fpu_except_flags (flags, 0);
|
|
}
|
|
|