rs6000.c (print_operand): Calculate signed constant more clearly.

rs6000.c (print_operand): Calculate signed constant more clearly.

        * rs6000.c (print_operand) [w]: Calculate signed constant more clearly.
        (rs6000_allocate_stack_space): Print as hexadecimal value.
        * rs6000.h (CONST_OK_FOR_LETTER_P): 'L' checks for a signed,
        16-bit shifted constant.  Fix typo for 'P'.
        (EXTRA_CONSTARINT): 'T' checks for a 32-bit mask operand.
        * rs6000.md (movsi, addsi3_internal1, movdi, adddi3_internal1):
        Use 'L' for shifted constant.
        (anddi3_internal3): Fix typo.
        (32-bit mask patterns): Use 'T'.

Co-Authored-By: Richard Henderson <rth@cygnus.com>
From-SVN: r26904