xref: /dragonfly/contrib/gdb-7/gdb/i387-tdep.h (revision ef5ccd6c)
1 /* Target-dependent code for the i387.
2 
3    Copyright (C) 2000-2013 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 3 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, see <http://www.gnu.org/licenses/>.  */
19 
20 #ifndef I387_TDEP_H
21 #define I387_TDEP_H
22 
23 struct gdbarch;
24 struct frame_info;
25 struct regcache;
26 struct type;
27 struct ui_file;
28 
29 /* Number of i387 floating point registers.  */
30 #define I387_NUM_REGS	16
31 
32 #define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum)
33 #define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs)
34 #define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum)
35 #define I387_NUM_YMM_REGS(tdep) ((tdep)->num_ymm_regs)
36 #define I387_YMM0H_REGNUM(tdep) ((tdep)->ymm0h_regnum)
37 
38 #define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8)
39 #define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1)
40 #define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2)
41 #define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3)
42 #define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4)
43 #define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5)
44 #define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6)
45 #define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7)
46 #define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16)
47 #define I387_MXCSR_REGNUM(tdep) \
48   (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep))
49 #define I387_YMMENDH_REGNUM(tdep) \
50   (I387_YMM0H_REGNUM (tdep) + I387_NUM_YMM_REGS (tdep))
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 /* Return nonzero if a value of type TYPE stored in register REGNUM
60    needs any special handling.  */
61 
62 extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
63 				    struct type *type);
64 
65 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
66    return its contents in TO.  */
67 
68 extern int i387_register_to_value (struct frame_info *frame, int regnum,
69 				   struct type *type, gdb_byte *to,
70 				   int *optimizedp, int *unavailablep);
71 
72 /* Write the contents FROM of a value of type TYPE into register
73    REGNUM in frame FRAME.  */
74 
75 extern void i387_value_to_register (struct frame_info *frame, int regnum,
76 				    struct type *type, const gdb_byte *from);
77 
78 
79 /* Size of the memory area use by the 'fsave' and 'fxsave'
80    instructions.  */
81 #define I387_SIZEOF_FSAVE	108
82 #define I387_SIZEOF_FXSAVE	512
83 
84 /* Fill register REGNUM in REGCACHE with the appropriate value from
85    *FSAVE.  This function masks off any of the reserved bits in
86    *FSAVE.  */
87 
88 extern void i387_supply_fsave (struct regcache *regcache, int regnum,
89 			       const void *fsave);
90 
91 /* Fill register REGNUM (if it is a floating-point register) in *FSAVE
92    with the value from REGCACHE.  If REGNUM is -1, do this for all
93    registers.  This function doesn't touch any of the reserved bits in
94    *FSAVE.  */
95 
96 extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
97 				void *fsave);
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 /* Similar to i387_supply_fxsave, but use XSAVE extended state.  */
107 
108 extern void i387_supply_xsave (struct regcache *regcache, int regnum,
109 			       const void *xsave);
110 
111 /* Fill register REGNUM (if it is a floating-point or SSE register) in
112    *FXSAVE with the value from REGCACHE.  If REGNUM is -1, do this for
113    all registers.  This function doesn't touch any of the reserved
114    bits in *FXSAVE.  */
115 
116 extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
117 				 void *fxsave);
118 
119 /* Similar to i387_collect_fxsave, but use XSAVE extended state.  */
120 
121 extern void i387_collect_xsave (const struct regcache *regcache,
122 				int regnum, void *xsave, int gcore);
123 
124 /* Prepare the FPU stack in REGCACHE for a function return.  */
125 
126 extern void i387_return_value (struct gdbarch *gdbarch,
127 			       struct regcache *regcache);
128 
129 #endif /* i387-tdep.h */
130