builtins.def (BUILT_IN_FABSD32): New DFP ABS builtin.

builtins.def (BUILT_IN_FABSD32): New DFP ABS builtin.

gcc/
	* builtins.def (BUILT_IN_FABSD32): New DFP ABS builtin.
	(BUILT_IN_FABSD64): Likewise.
	(BUILT_IN_FABSD128): Likewise.
	* builtins.c (expand_builtin): Add support for new DFP ABS builtins.
	(fold_builtin_1): Likewise.
	* config/rs6000/dfp.md (*negtd2_fpr): Handle non-overlapping destination
	and source operands.
	(*abstd2_fpr): Likewise.
	(*nabstd2_fpr): Likewise.

gcc/testsuite/
	* gcc.target/powerpc/dfp-dd-2.c: New test.
	* gcc.target/powerpc/dfp-td-2.c: Likewise.
	* gcc.target/powerpc/dfp-td-3.c: Likewise.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>
From-SVN: r201849