1 /* Target-dependent code for the i387.
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010
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 /* Number of i387 floating point registers. */
31 #define I387_NUM_REGS 16
33 #define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum)
34 #define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs)
35 #define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum)
37 #define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8)
38 #define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1)
39 #define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2)
40 #define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3)
41 #define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4)
42 #define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5)
43 #define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6)
44 #define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7)
45 #define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16)
46 #define I387_MXCSR_REGNUM(tdep) \
47 (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep))
49 /* Print out the i387 floating point state. */
51 extern void i387_print_float_info (struct gdbarch *gdbarch,
53 struct frame_info *frame,
56 /* Return nonzero if a value of type TYPE stored in register REGNUM
57 needs any special handling. */
59 extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
62 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
63 return its contents in TO. */
65 extern void i387_register_to_value (struct frame_info *frame, int regnum,
66 struct type *type, gdb_byte *to);
68 /* Write the contents FROM of a value of type TYPE into register
69 REGNUM in frame FRAME. */
71 extern void i387_value_to_register (struct frame_info *frame, int regnum,
72 struct type *type, const gdb_byte *from);
75 /* Size of the memory area use by the 'fsave' and 'fxsave'
77 #define I387_SIZEOF_FSAVE 108
78 #define I387_SIZEOF_FXSAVE 512
80 /* Fill register REGNUM in REGCACHE with the appropriate value from
81 *FSAVE. This function masks off any of the reserved bits in
84 extern void i387_supply_fsave (struct regcache *regcache, int regnum,
87 /* Fill register REGNUM (if it is a floating-point register) in *FSAVE
88 with the value from REGCACHE. If REGNUM is -1, do this for all
89 registers. This function doesn't touch any of the reserved bits in
92 extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
95 /* Fill register REGNUM in REGCACHE with the appropriate
96 floating-point or SSE register value from *FXSAVE. This function
97 masks off any of the reserved bits in *FXSAVE. */
99 extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
102 /* Fill register REGNUM (if it is a floating-point or SSE register) in
103 *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for
104 all registers. This function doesn't touch any of the reserved
107 extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
110 /* Prepare the FPU stack in REGCACHE for a function return. */
112 extern void i387_return_value (struct gdbarch *gdbarch,
113 struct regcache *regcache);
115 #endif /* i387-tdep.h */