1 /* Target-dependent code for the i387. 2 3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009 4 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 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. 12 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. 17 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/>. */ 20 21 #ifndef I387_TDEP_H 22 #define I387_TDEP_H 23 24 struct gdbarch; 25 struct frame_info; 26 struct regcache; 27 struct type; 28 struct ui_file; 29 30 #define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum) 31 #define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs) 32 #define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum) 33 34 #define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8) 35 #define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1) 36 #define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2) 37 #define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3) 38 #define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4) 39 #define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5) 40 #define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6) 41 #define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7) 42 #define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16) 43 #define I387_MXCSR_REGNUM(tdep) \ 44 (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep)) 45 46 /* Print out the i387 floating point state. */ 47 48 extern void i387_print_float_info (struct gdbarch *gdbarch, 49 struct ui_file *file, 50 struct frame_info *frame, 51 const char *args); 52 53 /* Return nonzero if a value of type TYPE stored in register REGNUM 54 needs any special handling. */ 55 56 extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum, 57 struct type *type); 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, gdb_byte *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 gdb_byte *from); 70 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 from REGCACHE. If REGNUM is -1, do this for all 86 registers. This function doesn't touch any of the reserved bits in 87 *FSAVE. */ 88 89 extern void i387_collect_fsave (const struct regcache *regcache, int regnum, 90 void *fsave); 91 92 /* Fill register REGNUM in REGCACHE with the appropriate 93 floating-point or SSE register value from *FXSAVE. This function 94 masks off any of the reserved bits in *FXSAVE. */ 95 96 extern void i387_supply_fxsave (struct regcache *regcache, int regnum, 97 const void *fxsave); 98 99 /* Fill register REGNUM (if it is a floating-point or SSE register) in 100 *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for 101 all registers. This function doesn't touch any of the reserved 102 bits in *FXSAVE. */ 103 104 extern void i387_collect_fxsave (const struct regcache *regcache, int regnum, 105 void *fxsave); 106 107 /* Prepare the FPU stack in REGCACHE for a function return. */ 108 109 extern void i387_return_value (struct gdbarch *gdbarch, 110 struct regcache *regcache); 111 112 #endif /* i387-tdep.h */ 113