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* gfortran.h: Add bitmasks for different FPE traps. Add fpe member to options_t. * invoke.texi: Document the new -ffpe-trap option. * lang.opt: Add -ffpe-trap option. * options.c (gfc_init_options): Initialize the FPE option. (gfc_handle_fpe_trap_option): New function to parse the argument of the -ffpe-trap option. (gfc_handle_option): Add case for -ffpe-trap. * trans-decl.c: Declare a tree for the set_fpe library function. (gfc_build_builtin_function_decls): Build this tree. (gfc_generate_function_code): Generate a call to set_fpe at the beginning of the main program. * trans.h: New tree for the set_fpe library function. * Makefile.am: Add fpu.c to the build process, and target-dependent code as fpu-target.h. * Makefile.in: Regenerate. * configure.ac: Add call to configure.host to set FPU_HOST_HEADER. * configure: Regenerate. * config.h.in: Regenerate. * aclocal.m4: Regenerate. * configure.host: New script to determine which host-dependent code should go in. * libgfortran.h: Add fpe option, remove previous fpu_ options. Add bitmasks for different FPE traps. Add prototype for set_fpu. * runtime/environ.c: Remove environment variables to control fpu behaviour. * runtime/fpu.c (set_fpe): New function for the front-end. * runtime/main.c (init): Set FPU state. * config: New directory to store host-dependent code. * config/fpu-387.h: New file with code handling the i387 FPU. * config/fpu-glibc.h: New file with code for glibc systems. * config/fpu-generic.h: Fallback for the most generic host. Issue warnings. From-SVN: r105328
122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
/* Copyright (C) 2002-2003, 2005 Free Software Foundation, Inc.
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Contributed by Andy Vaught and Paul Brook <paul@nowt.org>
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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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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You should have received a copy of the GNU General Public License
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along with libgfortran; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <stddef.h>
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#include "libgfortran.h"
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/* This is the offset (in bytes) required to cast from logical(8)* to
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logical(4)*. and still get the same result. Will be 0 for little-endian
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machines and 4 for big-endian machines. */
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int l8_to_l4_offset = 0;
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/* Figure out endianness for this machine. */
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static void
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determine_endianness (void)
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{
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union
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{
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GFC_LOGICAL_8 l8;
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GFC_LOGICAL_4 l4[2];
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} u;
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u.l8 = 1;
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if (u.l4[0])
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l8_to_l4_offset = 0;
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else if (u.l4[1])
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l8_to_l4_offset = 1;
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else
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runtime_error ("Unable to determine machine endianness");
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}
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static int argc_save;
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static char **argv_save;
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/* Set the saved values of the command line arguments. */
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void
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set_args (int argc, char **argv)
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{
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argc_save = argc;
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argv_save = argv;
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}
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/* Retrieve the saved values of the command line arguments. */
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void
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get_args (int *argc, char ***argv)
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{
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*argc = argc_save;
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*argv = argv_save;
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}
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/* Initialize the runtime library. */
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static void __attribute__((constructor))
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init (void)
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{
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/* Figure out the machine endianness. */
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determine_endianness ();
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/* Must be first */
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init_variables ();
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init_units ();
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set_fpu ();
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init_compile_options ();
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#ifdef DEBUG
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/* Check for special command lines. */
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if (argc > 1 && strcmp (argv[1], "--help") == 0)
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show_variables ();
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/* if (argc > 1 && strcmp(argv[1], "--resume") == 0) resume(); */
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#endif
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random_seed(NULL,NULL,NULL);
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}
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/* Cleanup the runtime library. */
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static void __attribute__((destructor))
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cleanup (void)
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{
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close_units ();
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}
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