[PATCH 5/17][ARM] Enable HI mode moves for floating point values.

[PATCH 5/17][ARM] Enable HI mode moves for floating point values.

gcc/
2016-09-23  Jiong Wang  <jiong.wang@arm.com>
	    Matthew Wahab  <matthew.wahab@arm.com>

	* config/arm/arm.c (output_move_vfp): Weaken assert to allow
	HImode.
	(arm_hard_regno_mode_ok): Allow HImode values in VFP registers.
	* config/arm/arm.md (*movhi_bytes): Disable when VFP registers are
	available.  Also fix some white-space.
	* config/arm/vfp.md (*arm_movhi_vfp): New.
	(*thumb2_movhi_vfp): New.

testsuite/
2016-09-23  Matthew Wahab  <matthew.wahab@arm.com>

	* gcc.target/arm/short-vfp-1.c: New.

From-SVN: r240403