* rs6000.md (movdi splitter): Sign extend more efficiently.
* rs6000.c (reg_or_arith_cint_operand): Redefine 64-bit constant
to "long long" valid on 32-bit and 64-bit hosts.
(logical_operand): Cast trunc_int_for_mode rturn value.
(rs6000_emit_move): Shift macro to encapsulate variable.
(rs6000_va_start): Use HOST_WIDE_INT_PRINT_DEC.
(rs6000_emit_{prologue,epilogue}): EH regno is unsigned but
plus_constant requires signed argument.
From-SVN: r42111
