* config/i386/avx512fp16intrin.h:
(_mm512_set1_pch): New intrinsic.
* config/i386/avx512fp16vlintrin.h:
(_mm256_set1_pch): New intrinsic.
(_mm_set1_pch): Ditto.
gcc/testsuite/ChangeLog:
* gcc.target/i386/avx512fp16-set1-pch-1a.c: New test.
* gcc.target/i386/avx512fp16-set1-pch-1b.c: New test.
* gcc.target/i386/avx512fp16vl-set1-pch-1a.c: New test.
* gcc.target/i386/avx512fp16vl-set1-pch-1b.c: New test.