Implement AVX512_FP16 #2303

Job	Run time
Check Style	12s
Automatic intrinsic verification	29s
Build std_detect	59s
Env Override (ubuntu-latest)	11s
Build Documentation	1m 19s
Env Override (windows-latest)	32s
Test (i686-unknown-linux-gnu)	2m 0s
Test (x86_64-unknown-linux-gnu)	4m 2s
Test (x86_64-unknown-linux-gnu-emulated)	9m 51s
Test (arm-unknown-linux-gnueabihf)	1m 12s
Test (armv7-unknown-linux-gnueabihf)	10m 21s
Test (aarch64-unknown-linux-gnu)	20m 39s
Test (riscv64gc-unknown-linux-gnu)	1m 19s
Test (powerpc64le-unknown-linux-gnu)	3m 28s
Test (s390x-unknown-linux-gnu)	1m 22s
Test (wasm32-wasip1)	1m 17s
Test (i586-unknown-linux-gnu)	2m 2s
Test (nvptx64-nvidia-cuda)	23s
Test (thumbv6m-none-eabi)	14s
Test (thumbv7m-none-eabi)	13s
Test (thumbv7em-none-eabi)	12s
Test (thumbv7em-none-eabihf)	12s
Test (x86_64-apple-darwin)	6m 33s
Test (aarch64-apple-darwin)	47s
Test (x86_64-pc-windows-msvc)	7m 3s
Test (i686-pc-windows-msvc)	3m 14s
Test (aarch64-pc-windows-msvc)	1m 12s
Test (x86_64-pc-windows-gnu)	7m 21s
success	1s
	1h 28m 40s

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