1 /* Implementation of the STOP statement.
2 Copyright (C) 2002-2014 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"
35 /* Fortran 2008 demands: If any exception (14) is signaling on that image, the
36 processor shall issue a warning indicating which exceptions are signaling;
37 this warning shall be on the unit identified by the named constant
38 ERROR_UNIT (13.8.2.8). In line with other compilers, we do not report
39 inexact - and we optionally ignore underflow, cf. thread starting at
40 http://mailman.j3-fortran.org/pipermail/j3/2013-June/006452.html. */
43 report_exception (void)
47 if (!compile_options
.fpe_summary
)
50 set_excepts
= get_fpu_except_flags ();
51 if ((set_excepts
& compile_options
.fpe_summary
) == 0)
54 estr_write ("Note: The following floating-point exceptions are signalling:");
56 if ((compile_options
.fpe_summary
& GFC_FPE_INVALID
)
57 && (set_excepts
& GFC_FPE_INVALID
))
58 estr_write (" IEEE_INVALID_FLAG");
60 if ((compile_options
.fpe_summary
& GFC_FPE_ZERO
)
61 && (set_excepts
& GFC_FPE_ZERO
))
62 estr_write (" IEEE_DIVIDE_BY_ZERO");
64 if ((compile_options
.fpe_summary
& GFC_FPE_OVERFLOW
)
65 && (set_excepts
& GFC_FPE_OVERFLOW
))
66 estr_write (" IEEE_OVERFLOW_FLAG");
68 if ((compile_options
.fpe_summary
& GFC_FPE_UNDERFLOW
)
69 && (set_excepts
& GFC_FPE_UNDERFLOW
))
70 estr_write (" IEEE_UNDERFLOW_FLAG");
72 if ((compile_options
.fpe_summary
& GFC_FPE_DENORMAL
)
73 && (set_excepts
& GFC_FPE_DENORMAL
))
74 estr_write (" IEEE_DENORMAL");
76 if ((compile_options
.fpe_summary
& GFC_FPE_INEXACT
)
77 && (set_excepts
& GFC_FPE_INEXACT
))
78 estr_write (" IEEE_INEXACT_FLAG");
84 /* A numeric STOP statement. */
86 extern void stop_numeric (GFC_INTEGER_4
)
87 __attribute__ ((noreturn
));
88 export_proto(stop_numeric
);
91 stop_numeric (GFC_INTEGER_4 code
)
97 st_printf ("STOP %d\n", (int)code
);
103 /* A Fortran 2008 numeric STOP statement. */
105 extern void stop_numeric_f08 (GFC_INTEGER_4
)
106 __attribute__ ((noreturn
));
107 export_proto(stop_numeric_f08
);
110 stop_numeric_f08 (GFC_INTEGER_4 code
)
113 st_printf ("STOP %d\n", (int)code
);
118 /* A character string or blank STOP statement. */
121 stop_string (const char *string
, GFC_INTEGER_4 len
)
126 estr_write ("STOP ");
127 (void) write (STDERR_FILENO
, string
, len
);
134 /* Per Fortran 2008, section 8.4: "Execution of a STOP statement initiates
135 normal termination of execution. Execution of an ERROR STOP statement
136 initiates error termination of execution." Thus, error_stop_string returns
137 a nonzero exit status code. */
139 extern void error_stop_string (const char *, GFC_INTEGER_4
)
140 __attribute__ ((noreturn
));
141 export_proto(error_stop_string
);
144 error_stop_string (const char *string
, GFC_INTEGER_4 len
)
147 estr_write ("ERROR STOP ");
148 (void) write (STDERR_FILENO
, string
, len
);
155 /* A numeric ERROR STOP statement. */
157 extern void error_stop_numeric (GFC_INTEGER_4
)
158 __attribute__ ((noreturn
));
159 export_proto(error_stop_numeric
);
162 error_stop_numeric (GFC_INTEGER_4 code
)
165 st_printf ("ERROR STOP %d\n", (int) code
);