/* Target-dependent code for the i387.
- Copyright 2000, 2001 Free Software Foundation, Inc.
+
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2007
+ Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#ifndef I387_TDEP_H
#define I387_TDEP_H
+struct gdbarch;
+struct frame_info;
+struct regcache;
+struct type;
+struct ui_file;
+
+/* Because the number of general-purpose registers is different for
+ AMD64, the floating-point registers and SSE registers get shifted.
+ The following definitions are intended to help writing code that
+ needs the register numbers of floating-point registers and SSE
+ registers. In order to use these, one should provide a definition
+ for I387_ST0_REGNUM, and possibly I387_NUM_XMM_REGS, preferably by
+ using a local "#define" in the body of the function that uses this.
+ Please "#undef" them before the end of the function. */
+
+#define I387_FCTRL_REGNUM (I387_ST0_REGNUM + 8)
+#define I387_FSTAT_REGNUM (I387_FCTRL_REGNUM + 1)
+#define I387_FTAG_REGNUM (I387_FCTRL_REGNUM + 2)
+#define I387_FISEG_REGNUM (I387_FCTRL_REGNUM + 3)
+#define I387_FIOFF_REGNUM (I387_FCTRL_REGNUM + 4)
+#define I387_FOSEG_REGNUM (I387_FCTRL_REGNUM + 5)
+#define I387_FOOFF_REGNUM (I387_FCTRL_REGNUM + 6)
+#define I387_FOP_REGNUM (I387_FCTRL_REGNUM + 7)
+#define I387_XMM0_REGNUM (I387_ST0_REGNUM + 16)
+#define I387_MXCSR_REGNUM (I387_XMM0_REGNUM + I387_NUM_XMM_REGS)
+\f
+
/* Print out the i387 floating point state. */
extern void i387_print_float_info (struct gdbarch *gdbarch,
struct frame_info *frame,
const char *args);
-/* Fill register REGNUM in GDB's register array with the appropriate
- value from *FSAVE. This function masks off any of the reserved
- bits in *FSAVE. */
+/* Read a value of type TYPE from register REGNUM in frame FRAME, and
+ return its contents in TO. */
+
+extern void i387_register_to_value (struct frame_info *frame, int regnum,
+ struct type *type, gdb_byte *to);
+
+/* Write the contents FROM of a value of type TYPE into register
+ REGNUM in frame FRAME. */
+
+extern void i387_value_to_register (struct frame_info *frame, int regnum,
+ struct type *type, const gdb_byte *from);
+\f
-extern void i387_supply_register (int regnum, char *fsave);
+/* Size of the memory area use by the 'fsave' and 'fxsave'
+ instructions. */
+#define I387_SIZEOF_FSAVE 108
+#define I387_SIZEOF_FXSAVE 512
-/* Fill GDB's register array with the floating-point register values
- in *FSAVE. This function masks off any of the reserved
- bits in *FSAVE. */
+/* Fill register REGNUM in REGCACHE with the appropriate value from
+ *FSAVE. This function masks off any of the reserved bits in
+ *FSAVE. */
-extern void i387_supply_fsave (char *fsave);
+extern void i387_supply_fsave (struct regcache *regcache, int regnum,
+ const void *fsave);
/* Fill register REGNUM (if it is a floating-point register) in *FSAVE
- with the value in GDB's register array. If REGNUM is -1, do this
- for all registers. This function doesn't touch any of the reserved
- bits in *FSAVE. */
+ with the value from REGCACHE. If REGNUM is -1, do this for all
+ registers. This function doesn't touch any of the reserved bits in
+ *FSAVE. */
-extern void i387_fill_fsave (char *fsave, int regnum);
+extern void i387_collect_fsave (const struct regcache *regcache, int regnum,
+ void *fsave);
-/* Fill GDB's register array with the floating-point and SSE register
- values in *FXSAVE. This function masks off any of the reserved
- bits in *FXSAVE. */
+/* Fill register REGNUM in REGCACHE with the appropriate
+ floating-point or SSE register value from *FXSAVE. This function
+ masks off any of the reserved bits in *FXSAVE. */
-extern void i387_supply_fxsave (char *fxsave);
+extern void i387_supply_fxsave (struct regcache *regcache, int regnum,
+ const void *fxsave);
/* Fill register REGNUM (if it is a floating-point or SSE register) in
- *FXSAVE with the value in GDB's register array. If REGNUM is -1, do
- this for all registers. This function doesn't touch any of the
- reserved bits in *FXSAVE. */
+ *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for
+ all registers. This function doesn't touch any of the reserved
+ bits in *FXSAVE. */
+
+extern void i387_collect_fxsave (const struct regcache *regcache, int regnum,
+ void *fxsave);
+
+/* Prepare the FPU stack in REGCACHE for a function return. */
-extern void i387_fill_fxsave (char *fxsave, int regnum);
+extern void i387_return_value (struct gdbarch *gdbarch,
+ struct regcache *regcache);
#endif /* i387-tdep.h */
projects / deliverable / binutils-gdb.git / blobdiff