+struct gdbarch;
+struct frame_info;
+struct regcache;
+struct type;
+struct ui_file;
+
+/* Number of i387 floating point registers. */
+#define I387_NUM_REGS 16
+
+#define I387_ST0_REGNUM(tdep) ((tdep)->st0_regnum)
+#define I387_NUM_XMM_REGS(tdep) ((tdep)->num_xmm_regs)
+#define I387_MM0_REGNUM(tdep) ((tdep)->mm0_regnum)
+#define I387_NUM_YMM_REGS(tdep) ((tdep)->num_ymm_regs)
+#define I387_YMM0H_REGNUM(tdep) ((tdep)->ymm0h_regnum)
+#define I387_BND0R_REGNUM(tdep) ((tdep)->bnd0r_regnum)
+#define I387_BNDCFGU_REGNUM(tdep) ((tdep)->bndcfgu_regnum)
+
+/* Set of constants used for 32 and 64-bit. */
+#define I387_NUM_MPX_REGS 6
+#define I387_NUM_BND_REGS 4
+#define I387_NUM_MPX_CTRL_REGS 2
+
+#define I387_FCTRL_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 8)
+#define I387_FSTAT_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 1)
+#define I387_FTAG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 2)
+#define I387_FISEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 3)
+#define I387_FIOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 4)
+#define I387_FOSEG_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 5)
+#define I387_FOOFF_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 6)
+#define I387_FOP_REGNUM(tdep) (I387_FCTRL_REGNUM (tdep) + 7)
+#define I387_XMM0_REGNUM(tdep) (I387_ST0_REGNUM (tdep) + 16)
+#define I387_MXCSR_REGNUM(tdep) \
+ (I387_XMM0_REGNUM (tdep) + I387_NUM_XMM_REGS (tdep))
+#define I387_YMMENDH_REGNUM(tdep) \
+ (I387_YMM0H_REGNUM (tdep) + I387_NUM_YMM_REGS (tdep))
+#define I387_MPXEND_REGNUM(tdep) \
+ (I387_BND0R_REGNUM (tdep) + I387_NUM_MPX_REGS)
+
+/* Print out the i387 floating point state. */
+
+extern void i387_print_float_info (struct gdbarch *gdbarch,
+ struct ui_file *file,
+ struct frame_info *frame,
+ const char *args);
+
+/* Return nonzero if a value of type TYPE stored in register REGNUM
+ needs any special handling. */
+
+extern int i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
+ struct type *type);
+
+/* Read a value of type TYPE from register REGNUM in frame FRAME, and
+ return its contents in TO. */
+
+extern int i387_register_to_value (struct frame_info *frame, int regnum,
+ struct type *type, gdb_byte *to,
+ int *optimizedp, int *unavailablep);
+
+/* 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
+
+/* Size of the memory area use by the 'fsave' and 'fxsave'
+ instructions. */
+#define I387_SIZEOF_FSAVE 108
+#define I387_SIZEOF_FXSAVE 512
+
+/* 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 (struct regcache *regcache, int regnum,
+ const void *fsave);
+
+/* Fill register REGNUM (if it is a floating-point register) 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. */