Allow 2 insns from sched group to issue in same cycle, if no stalls needed.
[official-gcc.git] / libgfortran / runtime / stop.c
blob81f00d77a6ce4d914d79c33f598d539fa17dedb1
1 /* Implementation of the STOP statement.
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
5 This file is part of the GNU Fortran runtime library (libgfortran).
7 Libgfortran is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either
10 version 3 of the License, or (at your option) any later version.
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #include "libgfortran.h"
28 #ifdef HAVE_UNISTD_H
29 #include <unistd.h>
30 #endif
33 /* Fortran 2008 demands: If any exception (14) is signaling on that image, the
34 processor shall issue a warning indicating which exceptions are signaling;
35 this warning shall be on the unit identified by the named constant
36 ERROR_UNIT (13.8.2.8). In line with other compilers, we do not report
37 inexact - and we optionally ignore underflow, cf. thread starting at
38 http://mailman.j3-fortran.org/pipermail/j3/2013-June/006452.html. */
40 static void
41 report_exception (void)
43 int set_excepts;
45 if (!compile_options.fpe_summary)
46 return;
48 set_excepts = get_fpu_except_flags ();
49 if ((set_excepts & compile_options.fpe_summary) == 0)
50 return;
52 estr_write ("Note: The following floating-point exceptions are signalling:");
54 if ((compile_options.fpe_summary & GFC_FPE_INVALID)
55 && (set_excepts & GFC_FPE_INVALID))
56 estr_write (" IEEE_INVALID_FLAG");
58 if ((compile_options.fpe_summary & GFC_FPE_ZERO)
59 && (set_excepts & GFC_FPE_ZERO))
60 estr_write (" IEEE_DIVIDE_BY_ZERO");
62 if ((compile_options.fpe_summary & GFC_FPE_OVERFLOW)
63 && (set_excepts & GFC_FPE_OVERFLOW))
64 estr_write (" IEEE_OVERFLOW_FLAG");
66 if ((compile_options.fpe_summary & GFC_FPE_UNDERFLOW)
67 && (set_excepts & GFC_FPE_UNDERFLOW))
68 estr_write (" IEEE_UNDERFLOW_FLAG");
70 if ((compile_options.fpe_summary & GFC_FPE_DENORMAL)
71 && (set_excepts & GFC_FPE_DENORMAL))
72 estr_write (" IEEE_DENORMAL");
74 if ((compile_options.fpe_summary & GFC_FPE_INEXACT)
75 && (set_excepts & GFC_FPE_INEXACT))
76 estr_write (" IEEE_INEXACT_FLAG");
78 estr_write ("\n");
82 /* A numeric STOP statement. */
84 extern _Noreturn void stop_numeric (GFC_INTEGER_4);
85 export_proto(stop_numeric);
87 void
88 stop_numeric (GFC_INTEGER_4 code)
90 report_exception ();
91 st_printf ("STOP %d\n", (int)code);
92 exit (code);
96 /* A character string or blank STOP statement. */
98 void
99 stop_string (const char *string, GFC_INTEGER_4 len)
101 report_exception ();
102 if (string)
104 estr_write ("STOP ");
105 (void) write (STDERR_FILENO, string, len);
106 estr_write ("\n");
108 exit (0);
112 /* Per Fortran 2008, section 8.4: "Execution of a STOP statement initiates
113 normal termination of execution. Execution of an ERROR STOP statement
114 initiates error termination of execution." Thus, error_stop_string returns
115 a nonzero exit status code. */
117 extern _Noreturn void error_stop_string (const char *, GFC_INTEGER_4);
118 export_proto(error_stop_string);
120 void
121 error_stop_string (const char *string, GFC_INTEGER_4 len)
123 report_exception ();
124 estr_write ("ERROR STOP ");
125 (void) write (STDERR_FILENO, string, len);
126 estr_write ("\n");
128 exit_error (1);
132 /* A numeric ERROR STOP statement. */
134 extern _Noreturn void error_stop_numeric (GFC_INTEGER_4);
135 export_proto(error_stop_numeric);
137 void
138 error_stop_numeric (GFC_INTEGER_4 code)
140 report_exception ();
141 st_printf ("ERROR STOP %d\n", (int) code);
142 exit_error (code);