1 /* Intel 387 floating point stuff.
2 Copyright (C) 1988, 1989, 1991, 1998 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 void i387_to_double PARAMS ((char *, char *));
29 void double_to_i387 PARAMS ((char *, char *));
31 /* FIXME: Eliminate these routines when we have the time to change all
35 i387_to_double (from, to)
39 floatformat_to_double (&floatformat_i387_ext, from, (double *)to);
43 double_to_i387 (from, to)
47 floatformat_from_double (&floatformat_i387_ext, (double *)from, to);
51 print_387_control_word (control)
54 printf_unfiltered ("control %s: ", local_hex_string(control));
55 printf_unfiltered ("compute to ");
56 switch ((control >> 8) & 3)
58 case 0: printf_unfiltered ("24 bits; "); break;
59 case 1: printf_unfiltered ("(bad); "); break;
60 case 2: printf_unfiltered ("53 bits; "); break;
61 case 3: printf_unfiltered ("64 bits; "); break;
63 printf_unfiltered ("round ");
64 switch ((control >> 10) & 3)
66 case 0: printf_unfiltered ("NEAREST; "); break;
67 case 1: printf_unfiltered ("DOWN; "); break;
68 case 2: printf_unfiltered ("UP; "); break;
69 case 3: printf_unfiltered ("CHOP; "); break;
73 printf_unfiltered ("mask:");
74 if (control & 0x0001) printf_unfiltered (" INVALID");
75 if (control & 0x0002) printf_unfiltered (" DENORM");
76 if (control & 0x0004) printf_unfiltered (" DIVZ");
77 if (control & 0x0008) printf_unfiltered (" OVERF");
78 if (control & 0x0010) printf_unfiltered (" UNDERF");
79 if (control & 0x0020) printf_unfiltered (" LOS");
80 printf_unfiltered (";");
82 printf_unfiltered ("\n");
83 if (control & 0xe080) warning ("reserved bits on: %s\n",
84 local_hex_string(control & 0xe080));
88 print_387_status_word (status)
91 printf_unfiltered ("status %s: ", local_hex_string (status));
94 printf_unfiltered ("exceptions:");
95 if (status & 0x0001) printf_unfiltered (" INVALID");
96 if (status & 0x0002) printf_unfiltered (" DENORM");
97 if (status & 0x0004) printf_unfiltered (" DIVZ");
98 if (status & 0x0008) printf_unfiltered (" OVERF");
99 if (status & 0x0010) printf_unfiltered (" UNDERF");
100 if (status & 0x0020) printf_unfiltered (" LOS");
101 if (status & 0x0040) printf_unfiltered (" FPSTACK");
102 printf_unfiltered ("; ");
104 printf_unfiltered ("flags: %d%d%d%d; ",
105 (status & 0x4000) != 0,
106 (status & 0x0400) != 0,
107 (status & 0x0200) != 0,
108 (status & 0x0100) != 0);
110 printf_unfiltered ("top %d\n", (status >> 11) & 7);