Function llvmint::x86::avx512_mask_packsswb_256

pub unsafe extern "C" fn avx512_mask_packsswb_256(
    a: i16x16, 
    b: i16x16, 
    c: i8x32, 
    d: i32
) -> i8x32

The llvm.x86.avx512.mask.packsswb.256 intrinsic; known as __builtin_ia32_packsswb256_mask in GCC.