[AArch64] Implement some saturating math NEON intrinsics.

[AArch64] Implement some saturating math NEON intrinsics.

	* config/aarch64/aarch64-simd.md (aarch64_sqdmulh_laneq<mode>):
	Use VSDQ_HSI mode iterator.
	(aarch64_sqrdmulh_laneq<mode>): Likewise.
	(aarch64_sq<r>dmulh_laneq<mode>_internal): New define_insn.
	* config/aarch64/aarch64-simd-builtins.def (sqdmulh_laneq):
	Use BUILTIN_VDQHS macro.
	(sqrdmulh_laneq): Likewise.
	* config/aarch64/arm_neon.h (vqdmlalh_laneq_s16): New intrinsic.
	(vqdmlals_laneq_s32): Likewise.
	(vqdmlslh_laneq_s16): Likewise.
	(vqdmlsls_laneq_s32): Likewise.
	(vqdmulhh_laneq_s16): Likewise.
	(vqdmulhs_laneq_s32): Likewise.
	(vqrdmulhh_laneq_s16): Likewise.
	(vqrdmulhs_laneq_s32): Likewise.

	* gcc.target/aarch64/simd/vqdmlalh_laneq_s16_1.c: New test.
	* gcc.target/aarch64/simd/vqdmlals_laneq_s32_1.c: Likewise.
	* gcc.target/aarch64/simd/vqdmlslh_laneq_s16_1.c: Likewise.
	* gcc.target/aarch64/simd/vqdmlsls_laneq_s32_1.c: Likewise.
	* gcc.target/aarch64/simd/vqdmulhh_laneq_s16_1.c: Likewise.
	* gcc.target/aarch64/simd/vqdmulhs_laneq_s32_1.c: Likewise.
	* gcc.target/aarch64/simd/vqrdmulhh_laneq_s16_1.c: Likewise.
	* gcc.target/aarch64/simd/vqrdmulhs_laneq_s32_1.c: Likewise.

From-SVN: r213635