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/* Target-dependent code for the i387.
Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007
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;
/* Because the number of general-purpose registers is different for
AMD64, the floating-point registers and SSE registers get shifted.
The following definitions are intended to help writing code that
needs the register numbers of floating-point registers and SSE
registers. In order to use these, one should provide a definition
for I387_ST0_REGNUM, and possibly I387_NUM_XMM_REGS, preferably by
using a local "#define" in the body of the function that uses this.
Please "#undef" them before the end of the function. */
#define I387_FCTRL_REGNUM (I387_ST0_REGNUM + 8)
#define I387_FSTAT_REGNUM (I387_FCTRL_REGNUM + 1)
#define I387_FTAG_REGNUM (I387_FCTRL_REGNUM + 2)
#define I387_FISEG_REGNUM (I387_FCTRL_REGNUM + 3)
#define I387_FIOFF_REGNUM (I387_FCTRL_REGNUM + 4)
#define I387_FOSEG_REGNUM (I387_FCTRL_REGNUM + 5)
#define I387_FOOFF_REGNUM (I387_FCTRL_REGNUM + 6)
#define I387_FOP_REGNUM (I387_FCTRL_REGNUM + 7)
#define I387_XMM0_REGNUM (I387_ST0_REGNUM + 16)
#define I387_MXCSR_REGNUM (I387_XMM0_REGNUM + I387_NUM_XMM_REGS)
/* 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 */
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