backport: re PR target/79545 (gcc[5/6]: RS6000, xvcvuxdsp and xvcvsxdsp RTL defines...

backport: re PR target/79545 (gcc[5/6]: RS6000, xvcvuxdsp and xvcvsxdsp RTL defines have wrong type)

gcc/ChangeLog:

2017-02-16  Carl Love  <cel@us.ibm.com>

   Backport from mainline commit r245460 on 2017-02-14

   PR 79545
   * 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:

2017-01-16  Carl Love  <cel@us.ibm.com>

   Backport from mainline commit r245460 on 2017-02-14

   PR 79545
   * gcc.target/powerpc/vsx-builtin-3.c: Add missing test case for the
   xvcvsxdsp and xvcvuxdsp instructions.

From-SVN: r245518