1 /* Target-dependent code for the i387.
3 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
5 This file is part of GDB.
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 2 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
31 /* Because the number of general-purpose registers is different for
32 AMD64, the floating-point registers and SSE registers get shifted.
33 The following definitions are intended to help writing code that
34 needs the register numbers of floating-point registers and SSE
35 registers. In order to use these, one should provide a definition
36 for I387_ST0_REGNUM, and possibly I387_NUM_XMM_REGS, preferably by
37 using a local "#define" in the body of the function that uses this.
38 Please "#undef" them before the end of the function. */
40 #define I387_FCTRL_REGNUM (I387_ST0_REGNUM + 8)
41 #define I387_FSTAT_REGNUM (I387_FCTRL_REGNUM + 1)
42 #define I387_FTAG_REGNUM (I387_FCTRL_REGNUM + 2)
43 #define I387_FISEG_REGNUM (I387_FCTRL_REGNUM + 3)
44 #define I387_FIOFF_REGNUM (I387_FCTRL_REGNUM + 4)
45 #define I387_FOSEG_REGNUM (I387_FCTRL_REGNUM + 5)
46 #define I387_FOOFF_REGNUM (I387_FCTRL_REGNUM + 6)
47 #define I387_FOP_REGNUM (I387_FCTRL_REGNUM + 7)
48 #define I387_XMM0_REGNUM (I387_ST0_REGNUM + 16)
49 #define I387_MXCSR_REGNUM (I387_XMM0_REGNUM + I387_NUM_XMM_REGS)
52 /* Print out the i387 floating point state. */
54 extern void i387_print_float_info (struct gdbarch *gdbarch,
56 struct frame_info *frame,
59 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
60 return its contents in TO. */
62 extern void i387_register_to_value (struct frame_info *frame, int regnum,
63 struct type *type, void *to);
65 /* Write the contents FROM of a value of type TYPE into register
66 REGNUM in frame FRAME. */
68 extern void i387_value_to_register (struct frame_info *frame, int regnum,
69 struct type *type, const void *from);
72 /* Size of the memory area use by the 'fsave' and 'fxsave'
74 #define I387_SIZEOF_FSAVE 108
75 #define I387_SIZEOF_FXSAVE 512
77 /* Fill register REGNUM in REGCACHE with the appropriate value from
78 *FSAVE. This function masks off any of the reserved bits in
81 extern void i387_supply_fsave (struct regcache *regcache, int regnum,
84 /* Fill register REGNUM (if it is a floating-point register) in *FSAVE
85 with the value in GDB's register cache. If REGNUM is -1, do this
86 for all registers. This function doesn't touch any of the reserved
89 extern void i387_fill_fsave (void *fsave, 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 in GDB's register cache. If REGNUM is -1, do
100 this for all registers. This function doesn't touch any of the
101 reserved bits in *FXSAVE. */
103 extern void i387_fill_fxsave (void *fxsave, int regnum);
105 /* Prepare the FPU stack in REGCACHE for a function return. */
107 extern void i387_return_value (struct gdbarch *gdbarch,
108 struct regcache *regcache);
110 #endif /* i387-tdep.h */