Add AVX512 k-mask intrinsics

Add AVX512 k-mask intrinsics

gcc/
	* config/i386/avx512bwintrin.h: Add k-mask test, kortest intrinsics.
	* config/i386/avx512dqintrin.h: Ditto.
	* config/i386/avx512fintrin.h: Ditto.
	* gcc/config/i386/i386.c: Handle new builtins.
	* config/i386/i386-builtin.def: Add new builtins.
	* config/i386/sse.md (ktest<mode>, kortest<mode>): New.
	(UNSPEC_KORTEST, UNSPEC_KTEST): New.

gcc/testsuite/
	* gcc.target/i386/avx512bw-ktestd-1.c: New test.
	* gcc.target/i386/avx512bw-ktestq-1.c: Ditto.
	* gcc.target/i386/avx512dq-ktestb-1.c: Ditto.
	* gcc.target/i386/avx512f-ktestw-1.c: Ditto.
	* gcc.target/i386/avx512bw-kortestd-1.c: Ditto.
	* gcc.target/i386/avx512bw-kortestq-1.c: Ditto.
	* gcc.target/i386/avx512dq-kortestb-1.c: Ditto.
	* gcc.target/i386/avx512f-kortestw-1.c: Ditto.
	* gcc.target/i386/avx512bw-ktestd-2.c: Ditt
	* gcc.target/i386/avx512bw-ktestq-2.c: Ditto.
	* gcc.target/i386/avx512dq-ktestb-2.c: Ditto.
	* gcc.target/i386/avx512f-ktestw-2.c: Ditto.
	* gcc.target/i386/avx512bw-kortestd-2.c: Ditto.
	* gcc.target/i386/avx512bw-kortestq-2.c: Ditto.
	* gcc.target/i386/avx512dq-kortestb-2.c: Ditto.
	* gcc.target/i386/avx512f-kortestw-2.c: Ditto.

From-SVN: r244801