Function llvmint::x86::avx512_mask_packsswb_128

pub unsafe extern "C" fn avx512_mask_packsswb_128(
    a: i16x8, 
    b: i16x8, 
    c: i8x16, 
    d: i16
) -> i8x16

The llvm.x86.avx512.mask.packsswb.128 intrinsic; known as __builtin_ia32_packsswb128_mask in GCC.