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/* 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);
}
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