| /* Intel 387 floating point stuff. |
| Copyright (C) 1988, 1989, 1991, 1998 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "frame.h" |
| #include "inferior.h" |
| #include "language.h" |
| #include "gdbcore.h" |
| #include "floatformat.h" |
| |
| void i387_to_double PARAMS ((char *, char *)); |
| |
| void double_to_i387 PARAMS ((char *, char *)); |
| |
| /* FIXME: Eliminate these routines when we have the time to change all |
| the callers. */ |
| |
| void |
| i387_to_double (from, to) |
| char *from; |
| char *to; |
| { |
| floatformat_to_double (&floatformat_i387_ext, from, (double *)to); |
| } |
| |
| void |
| double_to_i387 (from, to) |
| char *from; |
| char *to; |
| { |
| floatformat_from_double (&floatformat_i387_ext, (double *)from, to); |
| } |
| |
| void |
| print_387_control_word (control) |
| unsigned int control; |
| { |
| printf_unfiltered ("control %s: ", local_hex_string(control)); |
| printf_unfiltered ("compute to "); |
| switch ((control >> 8) & 3) |
| { |
| case 0: printf_unfiltered ("24 bits; "); break; |
| case 1: printf_unfiltered ("(bad); "); break; |
| case 2: printf_unfiltered ("53 bits; "); break; |
| case 3: printf_unfiltered ("64 bits; "); break; |
| } |
| printf_unfiltered ("round "); |
| switch ((control >> 10) & 3) |
| { |
| case 0: printf_unfiltered ("NEAREST; "); break; |
| case 1: printf_unfiltered ("DOWN; "); break; |
| case 2: printf_unfiltered ("UP; "); break; |
| case 3: printf_unfiltered ("CHOP; "); break; |
| } |
| if (control & 0x3f) |
| { |
| printf_unfiltered ("mask:"); |
| if (control & 0x0001) printf_unfiltered (" INVALID"); |
| if (control & 0x0002) printf_unfiltered (" DENORM"); |
| if (control & 0x0004) printf_unfiltered (" DIVZ"); |
| if (control & 0x0008) printf_unfiltered (" OVERF"); |
| if (control & 0x0010) printf_unfiltered (" UNDERF"); |
| if (control & 0x0020) printf_unfiltered (" LOS"); |
| printf_unfiltered (";"); |
| } |
| printf_unfiltered ("\n"); |
| if (control & 0xe080) warning ("reserved bits on: %s\n", |
| local_hex_string(control & 0xe080)); |
| } |
| |
| void |
| print_387_status_word (status) |
| unsigned int status; |
| { |
| printf_unfiltered ("status %s: ", local_hex_string (status)); |
| if (status & 0xff) |
| { |
| printf_unfiltered ("exceptions:"); |
| if (status & 0x0001) printf_unfiltered (" INVALID"); |
| if (status & 0x0002) printf_unfiltered (" DENORM"); |
| if (status & 0x0004) printf_unfiltered (" DIVZ"); |
| if (status & 0x0008) printf_unfiltered (" OVERF"); |
| if (status & 0x0010) printf_unfiltered (" UNDERF"); |
| if (status & 0x0020) printf_unfiltered (" LOS"); |
| if (status & 0x0040) printf_unfiltered (" FPSTACK"); |
| printf_unfiltered ("; "); |
| } |
| printf_unfiltered ("flags: %d%d%d%d; ", |
| (status & 0x4000) != 0, |
| (status & 0x0400) != 0, |
| (status & 0x0200) != 0, |
| (status & 0x0100) != 0); |
| |
| printf_unfiltered ("top %d\n", (status >> 11) & 7); |
| } |