1 /* Target-dependent code for the i387.
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007
4 Free Software Foundation, Inc.
6 This file is part of GDB.
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 2 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
32 /* Because the number of general-purpose registers is different for
33 AMD64, the floating-point registers and SSE registers get shifted.
34 The following definitions are intended to help writing code that
35 needs the register numbers of floating-point registers and SSE
36 registers. In order to use these, one should provide a definition
37 for I387_ST0_REGNUM, and possibly I387_NUM_XMM_REGS, preferably by
38 using a local "#define" in the body of the function that uses this.
39 Please "#undef" them before the end of the function. */
41 #define I387_FCTRL_REGNUM (I387_ST0_REGNUM + 8)
42 #define I387_FSTAT_REGNUM (I387_FCTRL_REGNUM + 1)
43 #define I387_FTAG_REGNUM (I387_FCTRL_REGNUM + 2)
44 #define I387_FISEG_REGNUM (I387_FCTRL_REGNUM + 3)
45 #define I387_FIOFF_REGNUM (I387_FCTRL_REGNUM + 4)
46 #define I387_FOSEG_REGNUM (I387_FCTRL_REGNUM + 5)
47 #define I387_FOOFF_REGNUM (I387_FCTRL_REGNUM + 6)
48 #define I387_FOP_REGNUM (I387_FCTRL_REGNUM + 7)
49 #define I387_XMM0_REGNUM (I387_ST0_REGNUM + 16)
50 #define I387_MXCSR_REGNUM (I387_XMM0_REGNUM + I387_NUM_XMM_REGS)
53 /* Print out the i387 floating point state. */
55 extern void i387_print_float_info (struct gdbarch
*gdbarch
,
57 struct frame_info
*frame
,
60 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
61 return its contents in TO. */
63 extern void i387_register_to_value (struct frame_info
*frame
, int regnum
,
64 struct type
*type
, gdb_byte
*to
);
66 /* Write the contents FROM of a value of type TYPE into register
67 REGNUM in frame FRAME. */
69 extern void i387_value_to_register (struct frame_info
*frame
, int regnum
,
70 struct type
*type
, const gdb_byte
*from
);
73 /* Size of the memory area use by the 'fsave' and 'fxsave'
75 #define I387_SIZEOF_FSAVE 108
76 #define I387_SIZEOF_FXSAVE 512
78 /* Fill register REGNUM in REGCACHE with the appropriate value from
79 *FSAVE. This function masks off any of the reserved bits in
82 extern void i387_supply_fsave (struct regcache
*regcache
, int regnum
,
85 /* Fill register REGNUM (if it is a floating-point register) in *FSAVE
86 with the value from REGCACHE. If REGNUM is -1, do this for all
87 registers. This function doesn't touch any of the reserved bits in
90 extern void i387_collect_fsave (const struct regcache
*regcache
, int regnum
,
93 /* Fill register REGNUM in REGCACHE with the appropriate
94 floating-point or SSE register value from *FXSAVE. This function
95 masks off any of the reserved bits in *FXSAVE. */
97 extern void i387_supply_fxsave (struct regcache
*regcache
, int regnum
,
100 /* Fill register REGNUM (if it is a floating-point or SSE register) in
101 *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for
102 all registers. This function doesn't touch any of the reserved
105 extern void i387_collect_fxsave (const struct regcache
*regcache
, int regnum
,
108 /* Prepare the FPU stack in REGCACHE for a function return. */
110 extern void i387_return_value (struct gdbarch
*gdbarch
,
111 struct regcache
*regcache
);
113 #endif /* i387-tdep.h */
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