* config/tc-alpha.c (O_samegp): New.

    * config/tc-alpha.c (O_samegp): New.
        (USER_RELOC_P): Include it.
        (alpha_reloc_op_tag, debug_exp, find_macro_match): Add it.
        (md_apply_fix3): Handle BFD_RELOC_ALPHA_BRSGP.
        (alpha_force_relocation, alpha_fix_adjustable): Likewise.
        (alpha_validate_fix): New.
        * config/tc-alpha.h (TC_VALIDATE_FIX): New.

        * gas/alpha/elf-reloc-5.s, gas/alpha/elf-reloc-5.d: New.
        * gas/alpha/elf-reloc-6.s, gas/alpha/elf-reloc-6.l: New.
        * gas/alpha/alpha.exp: Run them.