In a criminal case where a sentence of confinement is imposed, the Court will, when sentencing, make and report, along with the sentence, a finding as to the number of days, if any, that the defendant was confined in jail awaiting, and during, trial, prior to the imposition of sentence and not under any sentence of confinement, and that will be the number of days to be recorded in the mittimus by the Clerk and to be used by the jailer or warden in allowing the credit against the sentence imposed.