bfd/
[binutils-gdb.git] / gdb / i387-tdep.h
1 /* Target-dependent code for the i387.
2
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009
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 #define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum)
31 #define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs)
32 #define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum)
33
34 #define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8)
35 #define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1)
36 #define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2)
37 #define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3)
38 #define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4)
39 #define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5)
40 #define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6)
41 #define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7)
42 #define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16)
43 #define I387_MXCSR_REGNUM(tdep) \
44 (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep))
45
46 /* Print out the i387 floating point state. */
47
48 extern void i387_print_float_info (struct gdbarch *gdbarch,
49 struct ui_file *file,
50 struct frame_info *frame,
51 const char *args);
52
53 /* Return nonzero if a value of type TYPE stored in register REGNUM
54 needs any special handling. */
55
56 extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
57 struct type *type);
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, gdb_byte *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 gdb_byte *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 in REGCACHE with the appropriate
93 floating-point or SSE register value from *FXSAVE. This function
94 masks off any of the reserved bits in *FXSAVE. */
95
96 extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
97 const void *fxsave);
98
99 /* Fill register REGNUM (if it is a floating-point or SSE register) in
100 *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for
101 all registers. This function doesn't touch any of the reserved
102 bits in *FXSAVE. */
103
104 extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
105 void *fxsave);
106
107 /* Prepare the FPU stack in REGCACHE for a function return. */
108
109 extern void i387_return_value (struct gdbarch *gdbarch,
110 struct regcache *regcache);
111
112 #endif /* i387-tdep.h */