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