This patch supports following MVE ACLE "add with carry across beats" intrinsics and "beat-wise substract" intrinsics.

vadciq_s32, vadciq_u32, vadciq_m_s32, vadciq_m_u32, vadcq_s32, vadcq_u32, vadcq_m_s32, vadcq_m_u32, vsbciq_s32, vsbciq_u32, vsbciq_m_s32, vsbciq_m_u32, vsbcq_s32, vsbcq_u32, vsbcq_m_s32, vsbcq_m_u32.

Please refer to M-profile Vector Extension (MVE) intrinsics [1]  for more details.
[1] https://developer.arm.com/architectures/instruction-sets/simd-isas/helium/mve-intrinsics

2020-03-20  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
            Andre Vieira  <andre.simoesdiasvieira@arm.com>
            Mihail Ionescu  <mihail.ionescu@arm.com>

	* config/arm/arm-builtins.c (ARM_BUILTIN_GET_FPSCR_NZCVQC): Define.
	(ARM_BUILTIN_SET_FPSCR_NZCVQC): Likewise.
	(arm_init_mve_builtins): Add "__builtin_arm_get_fpscr_nzcvqc" and
	"__builtin_arm_set_fpscr_nzcvqc" to arm_builtin_decls array.
	(arm_expand_builtin): Define case ARM_BUILTIN_GET_FPSCR_NZCVQC
	and ARM_BUILTIN_SET_FPSCR_NZCVQC.
	* config/arm/arm_mve.h (vadciq_s32): Define macro.
	(vadciq_u32): Likewise.
	(vadciq_m_s32): Likewise.
	(vadciq_m_u32): Likewise.
	(vadcq_s32): Likewise.
	(vadcq_u32): Likewise.
	(vadcq_m_s32): Likewise.
	(vadcq_m_u32): Likewise.
	(vsbciq_s32): Likewise.
	(vsbciq_u32): Likewise.
	(vsbciq_m_s32): Likewise.
	(vsbciq_m_u32): Likewise.
	(vsbcq_s32): Likewise.
	(vsbcq_u32): Likewise.
	(vsbcq_m_s32): Likewise.
	(vsbcq_m_u32): Likewise.
	(__arm_vadciq_s32): Define intrinsic.
	(__arm_vadciq_u32): Likewise.
	(__arm_vadciq_m_s32): Likewise.
	(__arm_vadciq_m_u32): Likewise.
	(__arm_vadcq_s32): Likewise.
	(__arm_vadcq_u32): Likewise.
	(__arm_vadcq_m_s32): Likewise.
	(__arm_vadcq_m_u32): Likewise.
	(__arm_vsbciq_s32): Likewise.
	(__arm_vsbciq_u32): Likewise.
	(__arm_vsbciq_m_s32): Likewise.
	(__arm_vsbciq_m_u32): Likewise.
	(__arm_vsbcq_s32): Likewise.
	(__arm_vsbcq_u32): Likewise.
	(__arm_vsbcq_m_s32): Likewise.
	(__arm_vsbcq_m_u32): Likewise.
	(vadciq_m): Define polymorphic variant.
	(vadciq): Likewise.
	(vadcq_m): Likewise.
	(vadcq): Likewise.
	(vsbciq_m): Likewise.
	(vsbciq): Likewise.
	(vsbcq_m): Likewise.
	(vsbcq): Likewise.
	* config/arm/arm_mve_builtins.def (BINOP_NONE_NONE_NONE): Use builtin
	qualifier.
	(BINOP_UNONE_UNONE_UNONE): Likewise.
	(QUADOP_NONE_NONE_NONE_NONE_UNONE): Likewise.
	(QUADOP_UNONE_UNONE_UNONE_UNONE_UNONE): Likewise.
	* config/arm/mve.md (VADCIQ): Define iterator.
	(VADCIQ_M): Likewise.
	(VSBCQ): Likewise.
	(VSBCQ_M): Likewise.
	(VSBCIQ): Likewise.
	(VSBCIQ_M): Likewise.
	(VADCQ): Likewise.
	(VADCQ_M): Likewise.
	(mve_vadciq_m_<supf>v4si): Define RTL pattern.
	(mve_vadciq_<supf>v4si): Likewise.
	(mve_vadcq_m_<supf>v4si): Likewise.
	(mve_vadcq_<supf>v4si): Likewise.
	(mve_vsbciq_m_<supf>v4si): Likewise.
	(mve_vsbciq_<supf>v4si): Likewise.
	(mve_vsbcq_m_<supf>v4si): Likewise.
	(mve_vsbcq_<supf>v4si): Likewise.
	(get_fpscr_nzcvqc): Define isns.
	(set_fpscr_nzcvqc): Define isns.
	* config/arm/unspecs.md (UNSPEC_GET_FPSCR_NZCVQC): Define.
	(UNSPEC_SET_FPSCR_NZCVQC): Define.

gcc/testsuite/ChangeLog:

2020-03-20  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
           Andre Vieira  <andre.simoesdiasvieira@arm.com>
           Mihail Ionescu  <mihail.ionescu@arm.com>

	* gcc.target/arm/mve/intrinsics/vadciq_m_s32.c: New test.
	* gcc.target/arm/mve/intrinsics/vadciq_m_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vadciq_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vadciq_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vadcq_m_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vadcq_m_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vadcq_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vadcq_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vsbciq_m_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vsbciq_m_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vsbciq_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vsbciq_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vsbcq_m_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vsbcq_m_u32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vsbcq_s32.c: Likewise.
	* gcc.target/arm/mve/intrinsics/vsbcq_u32.c: Likewise.