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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [i387-tdep.h] - Blame information for rev 24

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1 24 jeremybenn
/* Target-dependent code for the i387.
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   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007, 2008
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   Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#ifndef I387_TDEP_H
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#define I387_TDEP_H
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struct gdbarch;
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struct frame_info;
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struct regcache;
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struct type;
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struct ui_file;
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/* Because the number of general-purpose registers is different for
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   AMD64, the floating-point registers and SSE registers get shifted.
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   The following definitions are intended to help writing code that
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   needs the register numbers of floating-point registers and SSE
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   registers.  In order to use these, one should provide a definition
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   for I387_ST0_REGNUM, and possibly I387_NUM_XMM_REGS, preferably by
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   using a local "#define" in the body of the function that uses this.
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   Please "#undef" them before the end of the function.  */
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#define I387_FCTRL_REGNUM       (I387_ST0_REGNUM + 8)
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#define I387_FSTAT_REGNUM       (I387_FCTRL_REGNUM + 1)
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#define I387_FTAG_REGNUM        (I387_FCTRL_REGNUM + 2)
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#define I387_FISEG_REGNUM       (I387_FCTRL_REGNUM + 3)
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#define I387_FIOFF_REGNUM       (I387_FCTRL_REGNUM + 4)
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#define I387_FOSEG_REGNUM       (I387_FCTRL_REGNUM + 5)
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#define I387_FOOFF_REGNUM       (I387_FCTRL_REGNUM + 6)
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#define I387_FOP_REGNUM         (I387_FCTRL_REGNUM + 7)
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#define I387_XMM0_REGNUM        (I387_ST0_REGNUM + 16)
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#define I387_MXCSR_REGNUM       (I387_XMM0_REGNUM + I387_NUM_XMM_REGS)
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/* Print out the i387 floating point state.  */
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extern void i387_print_float_info (struct gdbarch *gdbarch,
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                                   struct ui_file *file,
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                                   struct frame_info *frame,
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                                   const char *args);
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/* Return nonzero if a value of type TYPE stored in register REGNUM
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   needs any special handling.  */
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extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
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                                    struct type *type);
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/* Read a value of type TYPE from register REGNUM in frame FRAME, and
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   return its contents in TO.  */
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extern void i387_register_to_value (struct frame_info *frame, int regnum,
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                                    struct type *type, gdb_byte *to);
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/* Write the contents FROM of a value of type TYPE into register
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   REGNUM in frame FRAME.  */
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extern void i387_value_to_register (struct frame_info *frame, int regnum,
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                                    struct type *type, const gdb_byte *from);
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/* Size of the memory area use by the 'fsave' and 'fxsave'
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   instructions.  */
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#define I387_SIZEOF_FSAVE       108
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#define I387_SIZEOF_FXSAVE      512
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/* Fill register REGNUM in REGCACHE with the appropriate value from
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   *FSAVE.  This function masks off any of the reserved bits in
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   *FSAVE.  */
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extern void i387_supply_fsave (struct regcache *regcache, int regnum,
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                               const void *fsave);
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/* Fill register REGNUM (if it is a floating-point register) in *FSAVE
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   with the value from REGCACHE.  If REGNUM is -1, do this for all
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   registers.  This function doesn't touch any of the reserved bits in
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   *FSAVE.  */
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extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
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                                void *fsave);
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/* Fill register REGNUM in REGCACHE with the appropriate
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   floating-point or SSE register value from *FXSAVE.  This function
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   masks off any of the reserved bits in *FXSAVE.  */
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extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
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                                const void *fxsave);
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/* Fill register REGNUM (if it is a floating-point or SSE register) in
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   *FXSAVE with the value from REGCACHE.  If REGNUM is -1, do this for
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   all registers.  This function doesn't touch any of the reserved
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   bits in *FXSAVE.  */
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extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
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                                 void *fxsave);
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/* Prepare the FPU stack in REGCACHE for a function return.  */
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extern void i387_return_value (struct gdbarch *gdbarch,
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                               struct regcache *regcache);
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#endif /* i387-tdep.h */

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