result of y0 is never more precise than double

20 largest ulp errors (stored in a double)
   1215569141395856600.00000 ulp for y0(7.0860510603017728) = -3.7192471324942744e-15)
   97102859760612480.00000 ulp for y0(3.957678419314858) = 5.5511151231257827e-16)
   95336791261036400.00000 ulp for y0(7.0860510603017719) = -4.9404924595819466e-15)
   3513351951614740.00000 ulp for y0(3.9576784193148575) = 2.2204460492503131e-16)
   3086655457006340.50000 ulp for y0(0.89357696627916749) = -1.3877787807814457e-17)
   1756155562060734.20000 ulp for y0(3.9576784193148566) = 6.6613381477509392e-16)
   472412682730453.00000 ulp for y0(7.0860510603016982) = -2.0872192862952943e-14)
   394055091549128.56000 ulp for y0(0.89357696627916761) = 6.9388939039072284e-17)
   93489080461644.71900 ulp for y0(7.0860510603015987) = -5.1625370645069779e-14)
   66936182739781.32800 ulp for y0(0.89357696627916949) = 1.7208456881689926e-15)
   64537906457047.42200 ulp for y0(0.89357696627916772) = 1.7347234759768071e-16)
   50219069474278.75800 ulp for y0(3.9576784193148531) = 1.9428902930940239e-15)
   47026658260743.16400 ulp for y0(0.89357696627916861) = 9.4368957093138306e-16)
   43293473108559.46900 ulp for y0(47.911896331516481) = -2.1456670847672042e-17)
   25882147679067.48800 ulp for y0(10.222345043496418) = -1.9958488458452253e-16)
   24244953385920.91800 ulp for y0(25.922957653180923) = 3.5177432146548393e-17)
   17665856069036.03500 ulp for y0(13.361097473872764) = 1.45122095186989e-16)
   12402468256941.71900 ulp for y0(13.361097473872762) = -2.4258416649338018e-16)
   11709351136235.77000 ulp for y0(19.641309700887938) = -3.9176326743490367e-16)
   11701928157131.06100 ulp for y0(3.9576784193145729) = 1.1501910535116622e-13)

<tr><td align=left><a href=y0.res>y0</a></td><td align=right>976</td><td align=right>1215569141395856600.00000</td><td>7.0860510603017728</td><td>-3.7192471324942744e-15</td></tr>