On 2/6/19 9:10 AM, David Hildenbrand wrote: > Needed on s390x, to test for the data class of a number. So it will > gain soon a user. > > A number is considered normal if the exponent is neither 0 nor all 1's. > That can be checked by adding 1 to the exponent, and comparing against >> = 2 after dropping an eventual overflow into the sign bit. > While at it, convert the other floatXX_is_normal functions to use a > similar, less error prone calculation, as suggested by Richard H. > > Signed-off-by: David Hildenbrand <[email protected]> > --- > include/fpu/softfloat.h | 14 ++++++++++++-- > 1 file changed, 12 insertions(+), 2 deletions(-)
Reviewed-by: Richard Henderson <[email protected]> r~
