2014-04-22  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* config/nios2/nios2.md (UNSPEC_ROUND): New.
	(lroundsfsi2): New.
	* config/nios2/nios2.opt (mno-custom-round, mcustom-round=): New.
	* config/nios2/nios2-opts.h (N2FPU_ALL_CODES): Add round.
	* config/nios2/nios2.c (N2F_NO_ERRNO): Define.
	(nios2_fpu_insn): Add entry for round.
	(N2FPU_NO_ERRNO_P): Define.
	(nios2_custom_check_insns): Add check for N2F_NO_ERRNO and
	flag_errno_math.
	* doc/invoke.texi (Nios II Options): Document -mcustom-round.

	gcc/testsuite/
	* gcc.target/nios2/custom-fp-conversion.c: Adjust to test that
	lroundf generates custom round instruction, too.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@209670 138bc75d-0d04-0410-961f-82ee72b054a4