* config/m32c/m32c-pragma.c (m32c_register_pragmas): Register the
__far address space.
* config/m32c/m32c.h (ADDR_SPACE_FAR): New.  Add support for
"__far" address space for R8C and M16C processor variants.
* config/m32c/m32c.c (m32c_addr_space_legitimate_address_p): New.
(far_addr_space_p): New.
(encode_pattern_1): Add sign and zero extend support.
(m32c_hard_regno_nregs_1): Large pointers in A16 mode are SImode.
(m32c_extra_constraint_p2): Add SF constraint.
(m32c_legitimate_address_p): Support __far addresses.
(m32c_addr_space_pointer_mode): New.
(m32c_addr_space_address_mode): New.
(m32c_addr_space_legitimate_address_p): New.
(m32c_addr_space_legitimize_address): New.
(m32c_addr_space_subset_p): New.
(m32c_addr_space_convert): New.
(conversions): Add __far operand patterns.
(m32c_prepare_move): Force constants into registers for __far
moves.
(m32c_split_move): __far moves are always split.
* config/m32c/addsub.md (addsi3_1): Support SImode symbols.
* config/m32c/mov.md (mov<mode>_far_op1): New.
(mov<mode>_far_op2): New.
(movqi_op): Add __far (SF) support.
(movhi_op): Likewise.
(movsi_splittable): Split A1A0 also.

From-SVN: r165865