* config/tc-ppc.c (ppc_insert_operand): Truncate sign bits in

	* config/tc-ppc.c (ppc_insert_operand): Truncate sign bits in
	top 32 bits of 64 bit value if so doing results in passing
	range check.  Rewrite sign extension fudges similarly.  Enable
	fudges for powerpc64 too.  Report user value if range check
	fails rather than fudged value.  Negate PPC_OPERAND_NEGATIVE
	range rather than value, also to report user value on failure.