gdb/i387-tdep.h

   1 /* Target-dependent code for the i387.
   2
   3    Copyright (C) 2000-2004, 2007-2012 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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef I387_TDEP_H
  21 #define I387_TDEP_H
  22
  23 struct gdbarch;
  24 struct frame_info;
  25 struct regcache;
  26 struct type;
  27 struct ui_file;
  28
  29 /* Number of i387 floating point registers.  */
  30 #define I387_NUM_REGS   16
  31
  32 #define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum)
  33 #define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs)
  34 #define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum)
  35 #define I387_NUM_YMM_REGS(tdep) ((tdep)->num_ymm_regs)
  36 #define I387_YMM0H_REGNUM(tdep) ((tdep)->ymm0h_regnum)
  37
  38 #define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8)
  39 #define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1)
  40 #define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2)
  41 #define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3)
  42 #define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4)
  43 #define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5)
  44 #define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6)
  45 #define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7)
  46 #define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16)
  47 #define I387_MXCSR_REGNUM(tdep) \
  48   (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep))
  49 #define I387_YMMENDH_REGNUM(tdep) \
  50   (I387_YMM0H_REGNUM (tdep) + I387_NUM_YMM_REGS (tdep))
  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 /* Return nonzero if a value of type TYPE stored in register REGNUM
  60    needs any special handling.  */
  61
  62 extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
  63                                     struct type *type);
  64
  65 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
  66    return its contents in TO.  */
  67
  68 extern int i387_register_to_value (struct frame_info *frame, int regnum,
  69                                    struct type *type, gdb_byte *to,
  70                                    int *optimizedp, int *unavailablep);
  71
  72 /* Write the contents FROM of a value of type TYPE into register
  73    REGNUM in frame FRAME.  */
  74
  75 extern void i387_value_to_register (struct frame_info *frame, int regnum,
  76                                     struct type *type, const gdb_byte *from);
  77 \f
  78
  79 /* Size of the memory area use by the 'fsave' and 'fxsave'
  80    instructions.  */
  81 #define I387_SIZEOF_FSAVE       108
  82 #define I387_SIZEOF_FXSAVE      512
  83
  84 /* Fill register REGNUM in REGCACHE with the appropriate value from
  85    *FSAVE.  This function masks off any of the reserved bits in
  86    *FSAVE.  */
  87
  88 extern void i387_supply_fsave (struct regcache *regcache, int regnum,
  89                                const void *fsave);
  90
  91 /* Fill register REGNUM (if it is a floating-point register) in *FSAVE
  92    with the value from REGCACHE.  If REGNUM is -1, do this for all
  93    registers.  This function doesn't touch any of the reserved bits in
  94    *FSAVE.  */
  95
  96 extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
  97                                 void *fsave);
  98
  99 /* Fill register REGNUM in REGCACHE with the appropriate
 100    floating-point or SSE register value from *FXSAVE.  This function
 101    masks off any of the reserved bits in *FXSAVE.  */
 102
 103 extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
 104                                 const void *fxsave);
 105
 106 /* Similar to i387_supply_fxsave, but use XSAVE extended state.  */
 107
 108 extern void i387_supply_xsave (struct regcache *regcache, int regnum,
 109                                const void *xsave);
 110
 111 /* Fill register REGNUM (if it is a floating-point or SSE register) in
 112    *FXSAVE with the value from REGCACHE.  If REGNUM is -1, do this for
 113    all registers.  This function doesn't touch any of the reserved
 114    bits in *FXSAVE.  */
 115
 116 extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
 117                                  void *fxsave);
 118
 119 /* Similar to i387_collect_fxsave, but use XSAVE extended state.  */
 120
 121 extern void i387_collect_xsave (const struct regcache *regcache,
 122                                 int regnum, void *xsave, int gcore);
 123
 124 /* Prepare the FPU stack in REGCACHE for a function return.  */
 125
 126 extern void i387_return_value (struct gdbarch *gdbarch,
 127                                struct regcache *regcache);
 128
 129 #endif /* i387-tdep.h */