| 1 | /* Target-dependent code for the i387. |
| 2 | |
| 3 | Copyright 2000, 2001, 2002, 2003 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 2 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, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #ifndef I387_TDEP_H |
| 23 | #define I387_TDEP_H |
| 24 | |
| 25 | struct gdbarch; |
| 26 | struct frame_info; |
| 27 | struct regcache; |
| 28 | struct type; |
| 29 | struct ui_file; |
| 30 | |
| 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. */ |
| 39 | |
| 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) |
| 50 | \f |
| 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 | /* 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, void *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 void *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 in GDB's register cache. If REGNUM is -1, do this |
| 86 | for all registers. This function doesn't touch any of the reserved |
| 87 | bits in *FSAVE. */ |
| 88 | |
| 89 | extern void i387_fill_fsave (void *fsave, int regnum); |
| 90 | |
| 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. */ |
| 94 | |
| 95 | extern void i387_supply_fxsave (struct regcache *regcache, int regnum, |
| 96 | const void *fxsave); |
| 97 | |
| 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. */ |
| 102 | |
| 103 | extern void i387_fill_fxsave (void *fxsave, int regnum); |
| 104 | |
| 105 | #endif /* i387-tdep.h */ |