rs6000.c: Add case statement entry to make the xvcvuxdsp built-in argument unsigned.

rs6000.c: Add case statement entry to make the xvcvuxdsp built-in argument unsigned.

gcc/ChangeLog:

2017-02-14  Carl Love  <cel@us.ibm.com>

	* config/rs6000/rs6000.c: Add case statement entry to make the
	xvcvuxdsp built-in argument unsigned.
	* config/rs6000/vsx.md: Fix the source and return operand types so they
	match the instruction definitions from the ISA document.  Fix typo
	in the instruction generation for the (define_insn "vsx_xvcvuxdsp"
	statement.

gcc/testsuite/ChangeLog:

2017-01-14  Carl Love  <cel@us.ibm.com>

	* gcc.target/powerpc/vsx-builtin-3.c: Add missing test case for the
	xvcvsxdsp and xvcvuxdsp instructions.

From-SVN: r245460