* doc/invoke.texi: Document -mam34 and -mtune options.
        * config/mn10300/mn10300.c (mn10300_tune_string): New variable.
        (mn10300_tune_cpu): New variable.
        (mn10300_handle_option): Handle -mam34 and -mtune options.
        (mn10300_option_override): Convert tune string into tune cpu
        variable.
        (mn10300_legitimate_constant_p): Delete unused local variable.
        (is_load_insn): New function.
        (is_store_insn): New function.
        (mn10300_adjust_schedule_cost): New function.
        (TARGET_SCHED_ADJUST_COST): Define.
        * config/mn10300/mn10300.opt (mam34): New option.
        (mtune): New option.
        * config/mn10300/mn10300.h (TARGET_CPU_CPP_BUILTINS): Add AM34
        support.
        (enum processor_type): Add AM34.
        (TARGET_AM34): Define.
        * config/mn10300/mn10300.md (attr cpu): Add am34.
        Add pipeline description.
        (movqi, movhi, movsi, movsf, movdf, movdi): Fix predicates. Remove unneeded
        alternatives.  Add timing attribute.
        (pop_pic_reg, am33_addsi3, mn10300_addsi3, am33_subsi3,
        mn10300_subsi3, mulsidi3, umulsidi3, am33_mulsi3,
        mn10300_mulsi3, udivmodsi4_am33, divmodsi4, am33_andsi3,
        mn10300_andsi3, am33_iorsi3, mn10300_iorsi3, am33_xorsi3,
        mn10300_xorsi3, byte_clear, byte_set, bit_clear1, bit_clear2,
        bit_set, am33_iorqi3, mn10300_iorqi3, test_byte_bitfield,
        bit_test, subreg_bit_test, cmpsi, am33_cmpsf, am33_subsi3,
        float_conditional_branch, jump, indirect_jump, tablejump,
        call_internal, call_value_internal, zero_extendqisi2_am33,
        zero_extendqisi2_mn10300, zero_extendhisi2_am33,
        zero_extendhisi2_mn10300, extendqisi2_am33, extendqisi2_mn10300,
        extendhisi2_am33, extendhisi2_mn10300, am33_ashlsi3,
        mn10300_ashlsi3, am33_lshrsi3, mn10300_lshrsi3, am33_ashrisi3,
        mn10300_ashrsi3, abssf2_am33_2, negsf2_am33_2, rsqrtsf2,
        addsf3_internal, subsf3_internal, mulsf3_internal, divsf3,
        fmaddsf4, fmsubsf4, fnmaddsf4, fnmsubsf4, return_internal,
        return_internal_regs, store_movm, return, call_next_insn):
        Add timing attribute.
        (am33_subsi3): Add missing clobber of CC_REG.
        (am33_andsi3, mn10300_andsi3): Fix compile time warnings.
        (udivmodsi4, udivmodsi4_insn, divmodsi4, test_byte_bitfield,
        subreg_bit_test, zero_extendqisi2, zero_extendhisi2,
        extendqisi2): Fix predicates.
        (call_internal, call_internal_value): Separate alternatives.
        * config/mn10300/t-mn10300: Add AM34 multilib.

From-SVN: r166058