AVX512FP16: Add complex conjugation intrinsic instructions.
gcc/ChangeLog:
* config/i386/avx512fp16intrin.h: Add new intrinsics.
(_mm512_conj_pch): New intrinsic.
(_mm512_mask_conj_pch): Ditto.
(_mm512_maskz_conj_pch): Ditto.
* config/i386/avx512fp16vlintrin.h: Add new intrinsics.
(_mm256_conj_pch): New intrinsic.
(_mm256_mask_conj_pch): Ditto.
(_mm256_maskz_conj_pch): Ditto.
(_mm_conj_pch): Ditto.
(_mm_mask_conj_pch): Ditto.
(_mm_maskz_conj_pch): Ditto.
gcc/testsuite/ChangeLog:
* gcc.target/i386/avx512fp16-conjugation-1.c: New test.
* gcc.target/i386/avx512fp16vl-conjugation-1.c: New test.