diff options
Diffstat (limited to 'gdb/i387-tdep.c')
| -rw-r--r-- | gdb/i387-tdep.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/gdb/i387-tdep.c b/gdb/i387-tdep.c new file mode 100644 index 00000000000..869ab9a33b8 --- /dev/null +++ b/gdb/i387-tdep.c @@ -0,0 +1,111 @@ +/* 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); +} |