(mips_7000_hilo_fix): Declare. (append_insn): Conditionally insert nops after an mfhi/mflo insn. (md_parse_option): Check for 7000_HILO_FIX options. (OPTION_M7000_HILO_FIX): Define. (OPTION_NO_M7000_HILO_FIX): Define. * doc/c-mips.texi (-mfix7000): Describe.