fn test_high_bits_masked<'tcx>(
    ecx: &MiriInterpCx<'tcx>,
    op: &OpTy<'tcx>,
    mask: &OpTy<'tcx>,
) -> InterpResult<'tcx, (bool, bool)>Expand description
Calculates two booleans.
The first is true when the highest bit of each element of op & mask is zero.
The second is true when the highest bit of each element of !op & mask is zero.