AVX512 vpmaddubsw bit GEMM use uint4 in low bits #1

Job	Run time
build-and-test / cmake-linux-armhf	1s
build-and-test / cmake-linux-aarch64	1s
build-and-test / cmake-linux-local	1s
build-and-test / cmake-linux-riscv64	1s
build-and-test / cmake-linux-riscv64-rvv	1s
build-and-test / cmake-windows-arm64	1s
build-and-test / cmake-windows-x64	1s
build-and-test / cmake-windows-x86	1s
build-and-test / bazel-linux-aarch64	1s
build-and-test / bazel-linux-x86_64	1s
build-and-test / bazel-linux-x86_64-gcc-9	1s
build-and-test / cmake-android (build-android-arm64.sh)	1s
build-and-test / cmake-ios-arm64	4m 36s
build-and-test / cmake-android (build-android-armv7.sh)	1s
build-and-test / cmake-ios-x86_64	9m 12s
build-and-test / cmake-android (build-android-x86.sh)	1s
build-and-test / cmake-macos-arm64	10m 49s
	24m 51s

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