[deliverable/binutils-gdb.git] / gdb / i387-tdep.h

/* Target-dependent code for the i387.

   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008
   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)
\f

/* 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);
\f

/* 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 */
Commit	Line	Data
	1	/* Target-dependent code for the i387.
	2
	3	Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008
	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	/* 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	/* Return nonzero if a value of type TYPE stored in register REGNUM
	59	needs any special handling. */
	60
	61	extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
	62	struct type *type);
	63
	64	/* Read a value of type TYPE from register REGNUM in frame FRAME, and
	65	return its contents in TO. */
	66
	67	extern void i387_register_to_value (struct frame_info *frame, int regnum,
	68	struct type type, gdb_byte to);
	69
	70	/* Write the contents FROM of a value of type TYPE into register
	71	REGNUM in frame FRAME. */
	72
	73	extern void i387_value_to_register (struct frame_info *frame, int regnum,
	74	struct type type, const gdb_byte from);
	75	\f
	76
	77	/* Size of the memory area use by the 'fsave' and 'fxsave'
	78	instructions. */
	79	#define I387_SIZEOF_FSAVE 108
	80	#define I387_SIZEOF_FXSAVE 512
	81
	82	/* Fill register REGNUM in REGCACHE with the appropriate value from
	83	*FSAVE. This function masks off any of the reserved bits in
	84	FSAVE. /
	85
	86	extern void i387_supply_fsave (struct regcache *regcache, int regnum,
	87	const void *fsave);
	88
	89	/* Fill register REGNUM (if it is a floating-point register) in *FSAVE
	90	with the value from REGCACHE. If REGNUM is -1, do this for all
	91	registers. This function doesn't touch any of the reserved bits in
	92	FSAVE. /
	93
	94	extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
	95	void *fsave);
	96
	97	/* Fill register REGNUM in REGCACHE with the appropriate
	98	floating-point or SSE register value from *FXSAVE. This function
	99	masks off any of the reserved bits in FXSAVE. /
	100
	101	extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
	102	const void *fxsave);
	103
	104	/* Fill register REGNUM (if it is a floating-point or SSE register) in
	105	*FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for
	106	all registers. This function doesn't touch any of the reserved
	107	bits in FXSAVE. /
	108
	109	extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
	110	void *fxsave);
	111
	112	/* Prepare the FPU stack in REGCACHE for a function return. */
	113
	114	extern void i387_return_value (struct gdbarch *gdbarch,
	115	struct regcache *regcache);
	116
	117	#endif /* i387-tdep.h */