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8b19810222
PR fortran/29383 gcc/fortran/ * gfortran.h (gfc_simplify_ieee_selected_real_kind): New prototype. * libgfortran.h (GFC_FPE_*): Use simple integer values, valid in both C and Fortran. * expr.c (gfc_check_init_expr): Simplify IEEE_SELECTED_REAL_KIND. * simplify.c (gfc_simplify_ieee_selected_real_kind): New function. * module.c (mio_symbol): Keep track of symbols which came from intrinsic modules. (gfc_use_module): Keep track of the IEEE modules. * trans-decl.c (gfc_get_symbol_decl): Adjust code since we have new intrinsic modules. (gfc_build_builtin_function_decls): Build decls for ieee_procedure_entry and ieee_procedure_exit. (is_from_ieee_module, is_ieee_module_used, save_fp_state, restore_fp_state): New functions. (gfc_generate_function_code): Save and restore floating-point state on procedure entry/exit, when IEEE modules are used. * intrinsic.texi: Document the IEEE modules. libgfortran/ * configure.host: Add checks for IEEE support, rework priorities. * configure.ac: Define IEEE_SUPPORT, check for fpsetsticky and fpresetsticky. * configure: Regenerate. * Makefile.am: Build new ieee files, install IEEE_* modules. * Makefile.in: Regenerate. * gfortran.map (GFORTRAN_1.6): Add new symbols. * libgfortran.h (get_fpu_trap_exceptions, set_fpu_trap_exceptions, support_fpu_trap, set_fpu_except_flags, support_fpu_flag, support_fpu_rounding_mode, get_fpu_state, set_fpu_state): New prototypes. * config/fpu-*.h (get_fpu_trap_exceptions, set_fpu_trap_exceptions, support_fpu_trap, set_fpu_except_flags, support_fpu_flag, support_fpu_rounding_mode, get_fpu_state, set_fpu_state): New functions. * ieee/ieee_features.F90: New file. * ieee/ieee_exceptions.F90: New file. * ieee/ieee_arithmetic.F90: New file. * ieee/ieee_helper.c: New file. gcc/testsuite/ * lib/target-supports.exp (check_effective_target_fortran_ieee): New function. * gfortran.dg/ieee/ieee.exp: New file. * gfortran.dg/ieee/ieee_1.F90: New file. * gfortran.dg/ieee/ieee_2.f90: New file. * gfortran.dg/ieee/ieee_3.f90: New file. * gfortran.dg/ieee/ieee_4.f90: New file. * gfortran.dg/ieee/ieee_5.f90: New file. * gfortran.dg/ieee/ieee_6.f90: New file. * gfortran.dg/ieee/ieee_7.f90: New file. * gfortran.dg/ieee/ieee_rounding_1.f90: New file. From-SVN: r212102
471 lines
8.2 KiB
C
471 lines
8.2 KiB
C
/* SysV FPU-related code (for systems not otherwise supported).
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Copyright (C) 2005-2014 Free Software Foundation, Inc.
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Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>
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This file is part of the GNU Fortran runtime library (libgfortran).
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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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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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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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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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/* FPU-related code for SysV platforms with fpsetmask(). */
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/* BSD and Solaris systems have slightly different types and functions
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naming. We deal with these here, to simplify the code below. */
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#if HAVE_FP_EXCEPT
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# define FP_EXCEPT_TYPE fp_except
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#elif HAVE_FP_EXCEPT_T
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# define FP_EXCEPT_TYPE fp_except_t
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#else
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choke me
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#endif
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#if HAVE_FP_RND
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# define FP_RND_TYPE fp_rnd
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#elif HAVE_FP_RND_T
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# define FP_RND_TYPE fp_rnd_t
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#else
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choke me
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#endif
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#if HAVE_FPSETSTICKY
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# define FPSETSTICKY fpsetsticky
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#elif HAVE_FPRESETSTICKY
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# define FPSETSTICKY fpresetsticky
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#else
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choke me
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#endif
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void
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set_fpu_trap_exceptions (int trap, int notrap)
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{
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FP_EXCEPT_TYPE cw = fpgetmask();
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#ifdef FP_X_INV
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if (trap & GFC_FPE_INVALID)
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cw |= FP_X_INV;
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if (notrap & GFC_FPE_INVALID)
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cw &= ~FP_X_INV;
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#endif
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#ifdef FP_X_DNML
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if (trap & GFC_FPE_DENORMAL)
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cw |= FP_X_DNML;
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if (notrap & GFC_FPE_DENORMAL)
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cw &= ~FP_X_DNML;
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#endif
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#ifdef FP_X_DZ
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if (trap & GFC_FPE_ZERO)
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cw |= FP_X_DZ;
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if (notrap & GFC_FPE_ZERO)
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cw &= ~FP_X_DZ;
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#endif
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#ifdef FP_X_OFL
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if (trap & GFC_FPE_OVERFLOW)
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cw |= FP_X_OFL;
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if (notrap & GFC_FPE_OVERFLOW)
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cw &= ~FP_X_OFL;
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#endif
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#ifdef FP_X_UFL
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if (trap & GFC_FPE_UNDERFLOW)
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cw |= FP_X_UFL;
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if (notrap & GFC_FPE_UNDERFLOW)
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cw &= ~FP_X_UFL;
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#endif
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#ifdef FP_X_IMP
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if (trap & GFC_FPE_INEXACT)
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cw |= FP_X_IMP;
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if (notrap & GFC_FPE_INEXACT)
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cw &= ~FP_X_IMP;
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#endif
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fpsetmask(cw);
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}
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int
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get_fpu_trap_exceptions (void)
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{
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int res = 0;
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FP_EXCEPT_TYPE cw = fpgetmask();
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#ifdef FP_X_INV
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if (cw & FP_X_INV) res |= GFC_FPE_INVALID;
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#endif
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#ifdef FP_X_DNML
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if (cw & FP_X_DNML) res |= GFC_FPE_DENORMAL;
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#endif
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#ifdef FP_X_DZ
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if (cw & FP_X_DZ) res |= GFC_FPE_ZERO;
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#endif
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#ifdef FP_X_OFL
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if (cw & FP_X_OFL) res |= GFC_FPE_OVERFLOW;
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#endif
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#ifdef FP_X_UFL
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if (cw & FP_X_UFL) res |= GFC_FPE_UNDERFLOW;
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#endif
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#ifdef FP_X_IMP
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if (cw & FP_X_IMP) res |= GFC_FPE_INEXACT;
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#endif
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return res;
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}
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int
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support_fpu_trap (int flag)
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{
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return support_fpu_flag (flag);
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}
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void
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set_fpu (void)
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{
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#ifndef FP_X_INV
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if (options.fpe & GFC_FPE_INVALID)
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estr_write ("Fortran runtime warning: IEEE 'invalid operation' "
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"exception not supported.\n");
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#endif
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#ifndef FP_X_DNML
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if (options.fpe & GFC_FPE_DENORMAL)
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estr_write ("Fortran runtime warning: Floating point 'denormal operand' "
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"exception not supported.\n");
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#endif
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#ifndef FP_X_DZ
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if (options.fpe & GFC_FPE_ZERO)
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estr_write ("Fortran runtime warning: IEEE 'division by zero' "
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"exception not supported.\n");
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#endif
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#ifndef FP_X_OFL
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if (options.fpe & GFC_FPE_OVERFLOW)
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estr_write ("Fortran runtime warning: IEEE 'overflow' "
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"exception not supported.\n");
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#endif
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#ifndef FP_X_UFL
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if (options.fpe & GFC_FPE_UNDERFLOW)
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estr_write ("Fortran runtime warning: IEEE 'underflow' "
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"exception not supported.\n");
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#endif
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#ifndef FP_X_IMP
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if (options.fpe & GFC_FPE_INEXACT)
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estr_write ("Fortran runtime warning: IEEE 'inexact' "
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"exception not supported.\n");
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#endif
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set_fpu_trap_exceptions (options.fpe, 0);
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}
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int
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get_fpu_except_flags (void)
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{
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int result;
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FP_EXCEPT_TYPE set_excepts;
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result = 0;
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set_excepts = fpgetsticky ();
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#ifdef FP_X_INV
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if (set_excepts & FP_X_INV)
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result |= GFC_FPE_INVALID;
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#endif
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#ifdef FP_X_DZ
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if (set_excepts & FP_X_DZ)
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result |= GFC_FPE_ZERO;
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#endif
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#ifdef FP_X_OFL
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if (set_excepts & FP_X_OFL)
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result |= GFC_FPE_OVERFLOW;
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#endif
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#ifdef FP_X_UFL
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if (set_excepts & FP_X_UFL)
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result |= GFC_FPE_UNDERFLOW;
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#endif
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#ifdef FP_X_DNML
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if (set_excepts & FP_X_DNML)
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result |= GFC_FPE_DENORMAL;
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#endif
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#ifdef FP_X_IMP
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if (set_excepts & FP_X_IMP)
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result |= GFC_FPE_INEXACT;
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#endif
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return result;
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}
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void
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set_fpu_except_flags (int set, int clear)
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{
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FP_EXCEPT_TYPE flags;
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flags = fpgetsticky ();
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#ifdef FP_X_INV
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if (set & GFC_FPE_INVALID)
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flags |= FP_X_INV;
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if (clear & GFC_FPE_INVALID)
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flags &= ~FP_X_INV;
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#endif
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#ifdef FP_X_DZ
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if (set & GFC_FPE_ZERO)
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flags |= FP_X_DZ;
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if (clear & GFC_FPE_ZERO)
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flags &= ~FP_X_DZ;
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#endif
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#ifdef FP_X_OFL
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if (set & GFC_FPE_OVERFLOW)
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flags |= FP_X_OFL;
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if (clear & GFC_FPE_OVERFLOW)
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flags &= ~FP_X_OFL;
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#endif
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#ifdef FP_X_UFL
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if (set & GFC_FPE_UNDERFLOW)
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flags |= FP_X_UFL;
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if (clear & GFC_FPE_UNDERFLOW)
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flags &= ~FP_X_UFL;
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#endif
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#ifdef FP_X_DNML
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if (set & GFC_FPE_DENORMAL)
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flags |= FP_X_DNML;
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if (clear & GFC_FPE_DENORMAL)
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flags &= ~FP_X_DNML;
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#endif
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#ifdef FP_X_IMP
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if (set & GFC_FPE_INEXACT)
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flags |= FP_X_IMP;
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if (clear & GFC_FPE_INEXACT)
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flags &= ~FP_X_IMP;
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#endif
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FPSETSTICKY (flags);
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}
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int
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support_fpu_flag (int flag)
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{
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if (flag & GFC_FPE_INVALID)
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{
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#ifndef FP_X_INV
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return 0;
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#endif
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}
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else if (flag & GFC_FPE_ZERO)
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{
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#ifndef FP_X_DZ
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return 0;
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#endif
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}
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else if (flag & GFC_FPE_OVERFLOW)
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{
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#ifndef FP_X_OFL
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return 0;
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#endif
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}
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else if (flag & GFC_FPE_UNDERFLOW)
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{
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#ifndef FP_X_UFL
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return 0;
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#endif
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}
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else if (flag & GFC_FPE_DENORMAL)
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{
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#ifndef FP_X_DNML
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return 0;
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#endif
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}
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else if (flag & GFC_FPE_INEXACT)
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{
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#ifndef FP_X_IMP
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return 0;
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#endif
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}
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return 1;
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}
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int
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get_fpu_rounding_mode (void)
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{
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switch (fpgetround ())
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{
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#ifdef FP_RN
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case FP_RN:
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return GFC_FPE_TONEAREST;
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#endif
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#ifdef FP_RP
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case FP_RP:
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return GFC_FPE_UPWARD;
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#endif
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#ifdef FP_RM
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case FP_RM:
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return GFC_FPE_DOWNWARD;
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#endif
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#ifdef FP_RZ
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case FP_RZ:
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return GFC_FPE_TOWARDZERO;
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#endif
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default:
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return GFC_FPE_INVALID;
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}
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}
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void
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set_fpu_rounding_mode (int mode)
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{
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FP_RND_TYPE rnd_mode;
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switch (mode)
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{
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#ifdef FP_RN
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case GFC_FPE_TONEAREST:
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rnd_mode = FP_RN;
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break;
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#endif
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#ifdef FP_RP
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case GFC_FPE_UPWARD:
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rnd_mode = FP_RP;
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break;
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#endif
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#ifdef FP_RM
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case GFC_FPE_DOWNWARD:
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rnd_mode = FP_RM;
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break;
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#endif
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#ifdef FP_RZ
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case GFC_FPE_TOWARDZERO:
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rnd_mode = FP_RZ;
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break;
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#endif
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default:
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return;
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}
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fpsetround (rnd_mode);
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}
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int
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support_fpu_rounding_mode (int mode)
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{
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switch (mode)
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{
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case GFC_FPE_TONEAREST:
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#ifdef FP_RN
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return 1;
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#else
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return 0;
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#endif
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case GFC_FPE_UPWARD:
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#ifdef FP_RP
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return 1;
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#else
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return 0;
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#endif
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case GFC_FPE_DOWNWARD:
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#ifdef FP_RM
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return 1;
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#else
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return 0;
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#endif
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case GFC_FPE_TOWARDZERO:
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#ifdef FP_RZ
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return 1;
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#else
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return 0;
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#endif
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default:
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return 0;
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}
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}
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typedef struct
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{
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FP_EXCEPT_TYPE mask;
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FP_EXCEPT_TYPE sticky;
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FP_RND_TYPE round;
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} fpu_state_t;
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void
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get_fpu_state (void *s)
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{
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fpu_state_t *state = s;
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/* Check we can actually store the FPU state in the allocated size. */
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assert (sizeof(fpu_state_t) <= GFC_FPE_STATE_BUFFER_SIZE);
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state->mask = fpgetmask ();
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state->sticky = fpgetsticky ();
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state->round = fpgetround ();
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}
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void
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set_fpu_state (void *s)
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{
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fpu_state_t *state = s;
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/* Check we can actually store the FPU state in the allocated size. */
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assert (sizeof(fpu_state_t) <= GFC_FPE_STATE_BUFFER_SIZE);
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fpsetmask (state->mask);
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FPSETSTICKY (state->sticky);
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fpsetround (state->round);
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}
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