1 /* Intel 387 floating point stuff.
2 Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "floatformat.h"
27 /* FIXME: Eliminate these routines when we have the time to change all
31 i387_to_double (from
, to
)
35 floatformat_to_double (&floatformat_i387_ext
, from
, (double *)to
);
39 double_to_i387 (from
, to
)
43 floatformat_from_double (&floatformat_i387_ext
, (double *)from
, to
);
47 print_387_control_word (control
)
50 printf_unfiltered ("control %s: ", local_hex_string(control
));
51 printf_unfiltered ("compute to ");
52 switch ((control
>> 8) & 3)
54 case 0: printf_unfiltered ("24 bits; "); break;
55 case 1: printf_unfiltered ("(bad); "); break;
56 case 2: printf_unfiltered ("53 bits; "); break;
57 case 3: printf_unfiltered ("64 bits; "); break;
59 printf_unfiltered ("round ");
60 switch ((control
>> 10) & 3)
62 case 0: printf_unfiltered ("NEAREST; "); break;
63 case 1: printf_unfiltered ("DOWN; "); break;
64 case 2: printf_unfiltered ("UP; "); break;
65 case 3: printf_unfiltered ("CHOP; "); break;
69 printf_unfiltered ("mask:");
70 if (control
& 0x0001) printf_unfiltered (" INVALID");
71 if (control
& 0x0002) printf_unfiltered (" DENORM");
72 if (control
& 0x0004) printf_unfiltered (" DIVZ");
73 if (control
& 0x0008) printf_unfiltered (" OVERF");
74 if (control
& 0x0010) printf_unfiltered (" UNDERF");
75 if (control
& 0x0020) printf_unfiltered (" LOS");
76 printf_unfiltered (";");
78 printf_unfiltered ("\n");
79 if (control
& 0xe080) warning ("reserved bits on: %s\n",
80 local_hex_string(control
& 0xe080));
84 print_387_status_word (status
)
87 printf_unfiltered ("status %s: ", local_hex_string (status
));
90 printf_unfiltered ("exceptions:");
91 if (status
& 0x0001) printf_unfiltered (" INVALID");
92 if (status
& 0x0002) printf_unfiltered (" DENORM");
93 if (status
& 0x0004) printf_unfiltered (" DIVZ");
94 if (status
& 0x0008) printf_unfiltered (" OVERF");
95 if (status
& 0x0010) printf_unfiltered (" UNDERF");
96 if (status
& 0x0020) printf_unfiltered (" LOS");
97 if (status
& 0x0040) printf_unfiltered (" FPSTACK");
98 printf_unfiltered ("; ");
100 printf_unfiltered ("flags: %d%d%d%d; ",
101 (status
& 0x4000) != 0,
102 (status
& 0x0400) != 0,
103 (status
& 0x0200) != 0,
104 (status
& 0x0100) != 0);
106 printf_unfiltered ("top %d\n", (status
>> 11) & 7);
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