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

/* Target-dependent code for the i387.

   Copyright 2000, 2001, 2002, 2003, 2004 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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#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);

/* 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, void *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 void *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 (if it is a floating-point register) in *FSAVE
   with the value in GDB's register cache.  If REGNUM is -1, do this
   for all registers.  This function doesn't touch any of the reserved
   bits in *FSAVE.  */

extern void i387_fill_fsave (void *fsave, int regnum);

/* 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);

/* Fill register REGNUM (if it is a floating-point or SSE register) in
   *FXSAVE with the value in GDB's register cache.  If REGNUM is -1, do
   this for all registers.  This function doesn't touch any of the
   reserved bits in *FXSAVE.  */

extern void i387_fill_fxsave (void *fxsave, int regnum);

/* 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 2000, 2001, 2002, 2003, 2004 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 frame_info;
	27	struct regcache;
	28	struct type;
	29	struct ui_file;
	30
	31	/* Because the number of general-purpose registers is different for
	32	AMD64, the floating-point registers and SSE registers get shifted.
	33	The following definitions are intended to help writing code that
	34	needs the register numbers of floating-point registers and SSE
	35	registers. In order to use these, one should provide a definition
	36	for I387_ST0_REGNUM, and possibly I387_NUM_XMM_REGS, preferably by
	37	using a local "#define" in the body of the function that uses this.
	38	Please "#undef" them before the end of the function. */
	39
	40	#define I387_FCTRL_REGNUM (I387_ST0_REGNUM + 8)
	41	#define I387_FSTAT_REGNUM (I387_FCTRL_REGNUM + 1)
	42	#define I387_FTAG_REGNUM (I387_FCTRL_REGNUM + 2)
	43	#define I387_FISEG_REGNUM (I387_FCTRL_REGNUM + 3)
	44	#define I387_FIOFF_REGNUM (I387_FCTRL_REGNUM + 4)
	45	#define I387_FOSEG_REGNUM (I387_FCTRL_REGNUM + 5)
	46	#define I387_FOOFF_REGNUM (I387_FCTRL_REGNUM + 6)
	47	#define I387_FOP_REGNUM (I387_FCTRL_REGNUM + 7)
	48	#define I387_XMM0_REGNUM (I387_ST0_REGNUM + 16)
	49	#define I387_MXCSR_REGNUM (I387_XMM0_REGNUM + I387_NUM_XMM_REGS)
	50	\f
	51
	52	/* Print out the i387 floating point state. */
	53
	54	extern void i387_print_float_info (struct gdbarch *gdbarch,
	55	struct ui_file *file,
	56	struct frame_info *frame,
	57	const char *args);
	58
	59	/* Read a value of type TYPE from register REGNUM in frame FRAME, and
	60	return its contents in TO. */
	61
	62	extern void i387_register_to_value (struct frame_info *frame, int regnum,
	63	struct type type, void to);
	64
	65	/* Write the contents FROM of a value of type TYPE into register
	66	REGNUM in frame FRAME. */
	67
	68	extern void i387_value_to_register (struct frame_info *frame, int regnum,
	69	struct type type, const void from);
	70	\f
	71
	72	/* Size of the memory area use by the 'fsave' and 'fxsave'
	73	instructions. */
	74	#define I387_SIZEOF_FSAVE 108
	75	#define I387_SIZEOF_FXSAVE 512
	76
	77	/* Fill register REGNUM in REGCACHE with the appropriate value from
	78	*FSAVE. This function masks off any of the reserved bits in
	79	FSAVE. /
	80
	81	extern void i387_supply_fsave (struct regcache *regcache, int regnum,
	82	const void *fsave);
	83
	84	/* Fill register REGNUM (if it is a floating-point register) in *FSAVE
	85	with the value from REGCACHE. If REGNUM is -1, do this for all
	86	registers. This function doesn't touch any of the reserved bits in
	87	FSAVE. /
	88
	89	extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
	90	void *fsave);
	91
	92	/* Fill register REGNUM (if it is a floating-point register) in *FSAVE
	93	with the value in GDB's register cache. If REGNUM is -1, do this
	94	for all registers. This function doesn't touch any of the reserved
	95	bits in FSAVE. /
	96
	97	extern void i387_fill_fsave (void *fsave, int regnum);
	98
	99	/* Fill register REGNUM in REGCACHE with the appropriate
	100	floating-point or SSE register value from *FXSAVE. This function
	101	masks off any of the reserved bits in FXSAVE. /
	102
	103	extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
	104	const void *fxsave);
	105
	106	/* Fill register REGNUM (if it is a floating-point or SSE register) in
	107	*FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for
	108	all registers. This function doesn't touch any of the reserved
	109	bits in FXSAVE. /
	110
	111	extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
	112	void *fxsave);
	113
	114	/* Fill register REGNUM (if it is a floating-point or SSE register) in
	115	*FXSAVE with the value in GDB's register cache. If REGNUM is -1, do
	116	this for all registers. This function doesn't touch any of the
	117	reserved bits in FXSAVE. /
	118
	119	extern void i387_fill_fxsave (void *fxsave, int regnum);
	120
	121	/* Prepare the FPU stack in REGCACHE for a function return. */
	122
	123	extern void i387_return_value (struct gdbarch *gdbarch,
	124	struct regcache *regcache);
	125
	126	#endif /* i387-tdep.h */