• Peter Maydell's avatar
    target-arm: Ignore most exceptions from scalbn when doing fixpoint conversion · abe66f70
    Peter Maydell authored
    The VFP fixed point conversion helpers first call float_scalbn and
    then convert the result to an integer. This scalbn operation may
    set floating point exception flags for:
     * overflow & inexact (if it overflows to infinity)
     * input denormal squashed to zero
     * output denormal squashed to zero
    Of these, we only care about the input-denormal flag, since
    the output of the whole scale-and-convert operation will be
    an integer (so squashed-output-denormal and overflow don't
    apply). Suppress the others by saving the pre-scalb exception
    flags and only copying across a potential input-denormal flag.
    Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
    Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
helper.c 140 KB