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/* Target-dependent code for the i387.

   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010

   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 3 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, see <http://www.gnu.org/licenses/>.  */

#ifndef I387_TDEP_H

#define I387_TDEP_H

struct gdbarch;

struct frame_info;

struct regcache;

struct type;

struct ui_file;

#define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum)

#define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs)

#define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum)

#define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8)

#define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1)

#define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2)

#define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3)

#define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4)

#define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5)

#define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6)

#define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7)

#define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16)

#define I387_MXCSR_REGNUM(tdep) \

  (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep))

/* Print out the i387 floating point state.  */

extern void i387_print_float_info (struct gdbarch *gdbarch,

                                   struct ui_file *file,

                                   struct frame_info *frame,

                                   const char *args);

/* Return nonzero if a value of type TYPE stored in register REGNUM

   needs any special handling.  */

extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,

                                    struct type *type);

/* Read a value of type TYPE from register REGNUM in frame FRAME, and

   return its contents in TO.  */

extern void i387_register_to_value (struct frame_info *frame, int regnum,

                                    struct type *type, gdb_byte *to);

/* Write the contents FROM of a value of type TYPE into register

   REGNUM in frame FRAME.  */

extern void i387_value_to_register (struct frame_info *frame, int regnum,

                                    struct type *type, const gdb_byte *from);

/* Size of the memory area use by the 'fsave' and 'fxsave'

   instructions.  */

#define I387_SIZEOF_FSAVE       108

#define I387_SIZEOF_FXSAVE      512

/* Fill register REGNUM in REGCACHE with the appropriate value from

   *FSAVE.  This function masks off any of the reserved bits in

   *FSAVE.  */

extern void i387_supply_fsave (struct regcache *regcache, int regnum,

                               const void *fsave);

/* Fill register REGNUM (if it is a floating-point register) in *FSAVE

   with the value from REGCACHE.  If REGNUM is -1, do this for all

   registers.  This function doesn't touch any of the reserved bits in

   *FSAVE.  */

extern void i387_collect_fsave (const struct regcache *regcache, int regnum,

                                void *fsave);

/* Fill register REGNUM in REGCACHE with the appropriate

   floating-point or SSE register value from *FXSAVE.  This function

   masks off any of the reserved bits in *FXSAVE.  */

extern void i387_supply_fxsave (struct regcache *regcache, int regnum,

                                const void *fxsave);

/* Fill register REGNUM (if it is a floating-point or SSE register) in

   *FXSAVE with the value from REGCACHE.  If REGNUM is -1, do this for

   all registers.  This function doesn't touch any of the reserved

   bits in *FXSAVE.  */

extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,

                                 void *fxsave);

/* Prepare the FPU stack in REGCACHE for a function return.  */

extern void i387_return_value (struct gdbarch *gdbarch,

                               struct regcache *regcache);

#endif /* i387-tdep.h */