* config/rx/constraints.md (NEGint4): New constraint.
        * config/rx/rx.md (attr cc): Add set_zsc.
        (cbranchsf4): Only test for -fnon-call-exceptions if cfun has been
        initialised.
        (cmpsf): Likewise.
        (call_internal): Clobber the cc0 register.
        (call_value_internal): Likewise.
        (cstoresi4): Likewise.
        (movsieq): Likewise.
        (movsine): Likewise.
        (addsi3): Add alternative to handle small negative constants.
        (sunsi3): Likewise.
        (addsi3): Do not set the O bit in the cc0 register.
        (adddi3): Likewise.
        (subsi3): Likewise.
        (subdi3): Likewise.
        (andsi3): Reorder alternatives to prefer shorter forms.
        (mulsi3): Likewise.
        (iorsi3): Likewise.
        (negsi2): Note that the cc0 flags are set.
        (rotlsi3): Note that only the Z and S bits are set in cc0.
        (lshrsi3): Likewise.
        (ashlsi3): Likewise.
        (subsf3): Use %Q for the MEM operand.
        (fix_truncsfsi2): Likewise.
        (floatsisf2): Likewise.
        (bitset): Remove early clobber from destination.
        (bitset_in_memory): Likewise.
        (lrintsf2): Clobber the cc0 register.
        * config/rx/rx.c (rx_notice_update_cc):
        Handle CC_SET_ZSC.
        (rx_print_operand): Handle %N.

From-SVN: r160846