1 /* Target-dependent code for the i387. 2 3 Copyright (C) 2000-2013 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 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 */ 130