diff options
Diffstat (limited to 'gcc-4.9/libgfortran/config/fpu-sysv.h')
| -rw-r--r-- | gcc-4.9/libgfortran/config/fpu-sysv.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/gcc-4.9/libgfortran/config/fpu-sysv.h b/gcc-4.9/libgfortran/config/fpu-sysv.h new file mode 100644 index 000000000..e7ba88f4a --- /dev/null +++ b/gcc-4.9/libgfortran/config/fpu-sysv.h @@ -0,0 +1,203 @@ +/* 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); +} |