Function llvmint::amdgcn_atomic_dec_v4i32_p0i8

pub unsafe extern "C" fn amdgcn_atomic_dec_v4i32_p0i8(
    a: *mut i8, 
    b: i32x4
) -> i32x4

The llvm.amdgcn.atomic.dec.v4i32.p0i8 intrinsic.