I only needed to do a little light re-factoring to support the
half-precision helpers.
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-30-alex.bennee@linaro.org
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>