gdb/i387-tdep.h

   1 /* Target-dependent code for the i387.
   2
   3    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef I387_TDEP_H
  22 #define I387_TDEP_H
  23
  24 struct gdbarch;
  25 struct frame_info;
  26 struct regcache;
  27 struct type;
  28 struct ui_file;
  29
  30 /* Number of i387 floating point registers.  */
  31 #define I387_NUM_REGS   16
  32
  33 #define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum)
  34 #define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs)
  35 #define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum)
  36
  37 #define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8)
  38 #define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1)
  39 #define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2)
  40 #define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3)
  41 #define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4)
  42 #define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5)
  43 #define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6)
  44 #define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7)
  45 #define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16)
  46 #define I387_MXCSR_REGNUM(tdep) \
  47   (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep))
  48
  49 /* Print out the i387 floating point state.  */
  50
  51 extern void i387_print_float_info (struct gdbarch *gdbarch,
  52                                    struct ui_file *file,
  53                                    struct frame_info *frame,
  54                                    const char *args);
  55
  56 /* Return nonzero if a value of type TYPE stored in register REGNUM
  57    needs any special handling.  */
  58
  59 extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
  60                                     struct type *type);
  61
  62 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
  63    return its contents in TO.  */
  64
  65 extern void i387_register_to_value (struct frame_info *frame, int regnum,
  66                                     struct type *type, gdb_byte *to);
  67
  68 /* Write the contents FROM of a value of type TYPE into register
  69    REGNUM in frame FRAME.  */
  70
  71 extern void i387_value_to_register (struct frame_info *frame, int regnum,
  72                                     struct type *type, const gdb_byte *from);
  73 \f
  74
  75 /* Size of the memory area use by the 'fsave' and 'fxsave'
  76    instructions.  */
  77 #define I387_SIZEOF_FSAVE       108
  78 #define I387_SIZEOF_FXSAVE      512
  79
  80 /* Fill register REGNUM in REGCACHE with the appropriate value from
  81    *FSAVE.  This function masks off any of the reserved bits in
  82    *FSAVE.  */
  83
  84 extern void i387_supply_fsave (struct regcache *regcache, int regnum,
  85                                const void *fsave);
  86
  87 /* Fill register REGNUM (if it is a floating-point register) in *FSAVE
  88    with the value from REGCACHE.  If REGNUM is -1, do this for all
  89    registers.  This function doesn't touch any of the reserved bits in
  90    *FSAVE.  */
  91
  92 extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
  93                                 void *fsave);
  94
  95 /* Fill register REGNUM in REGCACHE with the appropriate
  96    floating-point or SSE register value from *FXSAVE.  This function
  97    masks off any of the reserved bits in *FXSAVE.  */
  98
  99 extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
 100                                 const void *fxsave);
 101
 102 /* Fill register REGNUM (if it is a floating-point or SSE register) in
 103    *FXSAVE with the value from REGCACHE.  If REGNUM is -1, do this for
 104    all registers.  This function doesn't touch any of the reserved
 105    bits in *FXSAVE.  */
 106
 107 extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
 108                                  void *fxsave);
 109
 110 /* Prepare the FPU stack in REGCACHE for a function return.  */
 111
 112 extern void i387_return_value (struct gdbarch *gdbarch,
 113                                struct regcache *regcache);
 114
 115 #endif /* i387-tdep.h */