| /* SysV FPU-related code (for systems not otherwise supported). |
| Copyright (C) 2005-2014 Free Software Foundation, Inc. |
| Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr> |
| |
| 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/>. */ |
| |
| /* FPU-related code for SysV platforms with fpsetmask(). */ |
| |
| void |
| set_fpu (void) |
| { |
| int cw = 0; |
| |
| if (options.fpe & GFC_FPE_INVALID) |
| #ifdef FP_X_INV |
| cw |= FP_X_INV; |
| #else |
| estr_write ("Fortran runtime warning: IEEE 'invalid operation' " |
| "exception not supported.\n"); |
| #endif |
| |
| if (options.fpe & GFC_FPE_DENORMAL) |
| #ifdef FP_X_DNML |
| cw |= FP_X_DNML; |
| #else |
| estr_write ("Fortran runtime warning: Floating point 'denormal operand' " |
| "exception not supported.\n"); |
| #endif |
| |
| if (options.fpe & GFC_FPE_ZERO) |
| #ifdef FP_X_DZ |
| cw |= FP_X_DZ; |
| #else |
| estr_write ("Fortran runtime warning: IEEE 'division by zero' " |
| "exception not supported.\n"); |
| #endif |
| |
| if (options.fpe & GFC_FPE_OVERFLOW) |
| #ifdef FP_X_OFL |
| cw |= FP_X_OFL; |
| #else |
| estr_write ("Fortran runtime warning: IEEE 'overflow' " |
| "exception not supported.\n"); |
| #endif |
| |
| if (options.fpe & GFC_FPE_UNDERFLOW) |
| #ifdef FP_X_UFL |
| cw |= FP_X_UFL; |
| #else |
| estr_write ("Fortran runtime warning: IEEE 'underflow' " |
| "exception not supported.\n"); |
| #endif |
| |
| if (options.fpe & GFC_FPE_INEXACT) |
| #ifdef FP_X_IMP |
| cw |= FP_X_IMP; |
| #else |
| estr_write ("Fortran runtime warning: IEEE 'inexact' " |
| "exception not supported.\n"); |
| #endif |
| |
| fpsetmask(cw); |
| } |
| |
| int |
| get_fpu_except_flags (void) |
| { |
| int result; |
| #if HAVE_FP_EXCEPT |
| fp_except set_excepts; |
| #elif HAVE_FP_EXCEPT_T |
| fp_except_t set_excepts; |
| #else |
| choke me |
| #endif |
| |
| result = 0; |
| set_excepts = fpgetsticky (); |
| |
| #ifdef FP_X_INV |
| if (set_excepts & FP_X_INV) |
| result |= GFC_FPE_INVALID; |
| #endif |
| |
| #ifdef FP_X_DZ |
| if (set_excepts & FP_X_DZ) |
| result |= GFC_FPE_ZERO; |
| #endif |
| |
| #ifdef FP_X_OFL |
| if (set_excepts & FP_X_OFL) |
| result |= GFC_FPE_OVERFLOW; |
| #endif |
| |
| #ifdef FP_X_UFL |
| if (set_excepts & FP_X_UFL) |
| result |= GFC_FPE_UNDERFLOW; |
| #endif |
| |
| #ifdef FP_X_DNML |
| if (set_excepts & FP_X_DNML) |
| result |= GFC_FPE_DENORMAL; |
| #endif |
| |
| #ifdef FP_X_IMP |
| if (set_excepts & FP_X_IMP) |
| result |= GFC_FPE_INEXACT; |
| #endif |
| |
| return result; |
| } |
| |
| |
| int |
| get_fpu_rounding_mode (void) |
| { |
| switch (fpgetround ()) |
| { |
| #ifdef FP_RN |
| case FP_RN: |
| return GFC_FPE_TONEAREST; |
| #endif |
| |
| #ifdef FP_RP |
| case FP_RP: |
| return GFC_FPE_UPWARD; |
| #endif |
| |
| #ifdef FP_RM |
| case FP_RM: |
| return GFC_FPE_DOWNWARD; |
| #endif |
| |
| #ifdef FP_RZ |
| case FP_RZ: |
| return GFC_FPE_TOWARDZERO; |
| #endif |
| default: |
| return GFC_FPE_INVALID; |
| } |
| } |
| |
| |
| void |
| set_fpu_rounding_mode (int mode) |
| { |
| #if HAVE_FP_RND |
| fp_rnd rnd_mode; |
| #elif HAVE_FP_RND_T |
| fp_rnd_t rnd_mode; |
| #else |
| choke me |
| #endif |
| |
| switch (mode) |
| { |
| #ifdef FP_RN |
| case GFC_FPE_TONEAREST: |
| rnd_mode = FP_RN; |
| break; |
| #endif |
| |
| #ifdef FP_RP |
| case GFC_FPE_UPWARD: |
| rnd_mode = FP_RP; |
| break; |
| #endif |
| |
| #ifdef FP_RM |
| case GFC_FPE_DOWNWARD: |
| rnd_mode = FP_RM; |
| break; |
| #endif |
| |
| #ifdef FP_RZ |
| case GFC_FPE_TOWARDZERO: |
| rnd_mode = FP_RZ; |
| break; |
| #endif |
| default: |
| return; |
| } |
| fpsetround (rnd_mode); |
| } |