1 /* Target-dependent code for the i387. 2 3 Copyright 2000, 2001, 2002, 2003, 2004 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 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 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 (if it is a floating-point register) in *FSAVE 93 with the value in GDB's register cache. If REGNUM is -1, do this 94 for all registers. This function doesn't touch any of the reserved 95 bits in *FSAVE. */ 96 97 extern void i387_fill_fsave (void *fsave, int regnum); 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 /* Fill register REGNUM (if it is a floating-point or SSE register) in 107 *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for 108 all registers. This function doesn't touch any of the reserved 109 bits in *FXSAVE. */ 110 111 extern void i387_collect_fxsave (const struct regcache *regcache, int regnum, 112 void *fxsave); 113 114 /* Fill register REGNUM (if it is a floating-point or SSE register) in 115 *FXSAVE with the value in GDB's register cache. If REGNUM is -1, do 116 this for all registers. This function doesn't touch any of the 117 reserved bits in *FXSAVE. */ 118 119 extern void i387_fill_fxsave (void *fxsave, int regnum); 120 121 /* Prepare the FPU stack in REGCACHE for a function return. */ 122 123 extern void i387_return_value (struct gdbarch *gdbarch, 124 struct regcache *regcache); 125 126 #endif /* i387-tdep.h */ 127