gdb/i387-tdep.h

   1 /* Target-dependent code for the i387.
   2
   3    Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef I387_TDEP_H
  23 #define I387_TDEP_H
  24
  25 struct gdbarch;
  26 struct ui_file;
  27 struct frame_info;
  28 struct type;
  29
  30 /* Because the number of general-purpose registers is different for
  31    AMD64, the floating-point registers and SSE registers get shifted.
  32    The following definitions are intended to help writing code that
  33    needs the register numbers of floating-point registers and SSE
  34    registers.  In order to use these, one should provide a definition
  35    for I387_ST0_REGNUM, and possibly I387_NUM_XMM_REGS, preferably by
  36    using a local "#define" in the body of the function that uses this.
  37    Please "#undef" them before the end of the function.  */
  38
  39 #define I387_FCTRL_REGNUM       (I387_ST0_REGNUM + 8)
  40 #define I387_FSTAT_REGNUM       (I387_FCTRL_REGNUM + 1)
  41 #define I387_FTAG_REGNUM        (I387_FCTRL_REGNUM + 2)
  42 #define I387_FISEG_REGNUM       (I387_FCTRL_REGNUM + 3)
  43 #define I387_FIOFF_REGNUM       (I387_FCTRL_REGNUM + 4)
  44 #define I387_FOSEG_REGNUM       (I387_FCTRL_REGNUM + 5)
  45 #define I387_FOOFF_REGNUM       (I387_FCTRL_REGNUM + 6)
  46 #define I387_FOP_REGNUM         (I387_FCTRL_REGNUM + 7)
  47 #define I387_XMM0_REGNUM        (I387_ST0_REGNUM + 16)
  48 #define I387_MXCSR_REGNUM       (I387_XMM0_REGNUM + I387_NUM_XMM_REGS)
  49 \f
  50
  51 /* Print out the i387 floating point state.  */
  52
  53 extern void i387_print_float_info (struct gdbarch *gdbarch,
  54                                    struct ui_file *file,
  55                                    struct frame_info *frame,
  56                                    const char *args);
  57
  58 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
  59    return its contents in TO.  */
  60
  61 extern void i387_register_to_value (struct frame_info *frame, int regnum,
  62                                     struct type *type, void *to);
  63
  64 /* Write the contents FROM of a value of type TYPE into register
  65    REGNUM in frame FRAME.  */
  66
  67 extern void i387_value_to_register (struct frame_info *frame, int regnum,
  68                                     struct type *type, const void *from);
  69 \f
  70
  71 /* Size of the memory area use by the 'fsave' and 'fxsave'
  72    instructions.  */
  73 #define I387_SIZEOF_FSAVE       108
  74 #define I387_SIZEOF_FXSAVE      512
  75
  76 /* Fill register REGNUM in GDB's register cache with the appropriate
  77    value from *FSAVE.  This function masks off any of the reserved
  78    bits in *FSAVE.  */
  79
  80 extern void i387_supply_fsave (const void *fsave, int regnum);
  81
  82 /* Fill register REGNUM (if it is a floating-point register) in *FSAVE
  83    with the value in GDB's register cache.  If REGNUM is -1, do this
  84    for all registers.  This function doesn't touch any of the reserved
  85    bits in *FSAVE.  */
  86
  87 extern void i387_fill_fsave (void *fsave, int regnum);
  88
  89 /* Fill register REGNUM in GDB's register cache with the appropriate
  90    floating-point or SSE register value from *FXSAVE.  This function
  91    masks off any of the reserved bits in *FXSAVE.  */
  92
  93 extern void i387_supply_fxsave (const void *fxsave, int regnum);
  94
  95 /* Fill register REGNUM (if it is a floating-point or SSE register) in
  96    *FXSAVE with the value in GDB's register cache.  If REGNUM is -1, do
  97    this for all registers.  This function doesn't touch any of the
  98    reserved bits in *FXSAVE.  */
  99
 100 extern void i387_fill_fxsave (void *fxsave, int regnum);
 101
 102 #endif /* i387-tdep.h */