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 3 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, see <http://www.gnu.org/licenses/>. */
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. */
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)
51 /* Print out the i387 floating point state. */
53 extern void i387_print_float_info (struct gdbarch
*gdbarch
,
55 struct frame_info
*frame
,
58 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
59 return its contents in TO. */
61 extern void i387_register_to_value (struct frame_info
*frame
, int regnum
,
62 struct type
*type
, gdb_byte
*to
);
64 /* Write the contents FROM of a value of type TYPE into register
65 REGNUM in frame FRAME. */
67 extern void i387_value_to_register (struct frame_info
*frame
, int regnum
,
68 struct type
*type
, const gdb_byte
*from
);
71 /* Size of the memory area use by the 'fsave' and 'fxsave'
73 #define I387_SIZEOF_FSAVE 108
74 #define I387_SIZEOF_FXSAVE 512
76 /* Fill register REGNUM in REGCACHE with the appropriate value from
77 *FSAVE. This function masks off any of the reserved bits in
80 extern void i387_supply_fsave (struct regcache
*regcache
, int regnum
,
83 /* Fill register REGNUM (if it is a floating-point register) in *FSAVE
84 with the value from REGCACHE. If REGNUM is -1, do this for all
85 registers. This function doesn't touch any of the reserved bits in
88 extern void i387_collect_fsave (const struct regcache
*regcache
, int regnum
,
91 /* Fill register REGNUM in REGCACHE with the appropriate
92 floating-point or SSE register value from *FXSAVE. This function
93 masks off any of the reserved bits in *FXSAVE. */
95 extern void i387_supply_fxsave (struct regcache
*regcache
, int regnum
,
98 /* Fill register REGNUM (if it is a floating-point or SSE register) in
99 *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for
100 all registers. This function doesn't touch any of the reserved
103 extern void i387_collect_fxsave (const struct regcache
*regcache
, int regnum
,
106 /* Prepare the FPU stack in REGCACHE for a function return. */
108 extern void i387_return_value (struct gdbarch
*gdbarch
,
109 struct regcache
*regcache
);
111 #endif /* i387-tdep.h */
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