result of y0 is never more precise than double

20 largest ulp errors (stored in a double)
   1129971635514619.75000 ulp for y0(0.893576966279167495) = -2.6871273218695424e-17)
   396696673349893.68750 ulp for y0(3.95767841931485798) = -4.57758966494739554e-17)
   283279295050696.56250 ulp for y0(0.893576966279167606) = 7.07543561500462159e-17)
   141070767937064.56250 ulp for y0(0.893576966279167717) = 1.68403702441310976e-16)
   101312302554023.51562 ulp for y0(7.08605106030177279) = 2.68266743610628222e-17)
   63610537893104.97656 ulp for y0(3.95767841931485753) = 1.33865671568319978e-16)
   28856138311757.51172 ulp for y0(10.2223450434964178) = -1.98235481652117254e-16)
   23338731531638.53125 ulp for y0(47.9118963315164805) = -2.16619971807553946e-17)
   17734981302023.16797 ulp for y0(0.893576966279168605) = 9.49466335631657388e-16)
   17629958181701.32422 ulp for y0(0.893576966279169493) = 1.73056962640347201e-15)
   12800474794963.45703 ulp for y0(10.222345043496416) = 2.45242772816244191e-16)
   10824746102235.43750 ulp for y0(35.3464523052143207) = -2.41195522226328249e-17)
   8158858394957.75879 ulp for y0(3.95767841931485309) = 1.92630046500111395e-15)
   7740486173170.72852 ulp for y0(7.0860510603017719) = -2.39644108208368926e-16)
   6990013345894.27441 ulp for y0(29.0640302527283971) = 1.3711092660677041e-16)
   4082372069547.08203 ulp for y0(25.9229576531809229) = 3.53520127684334767e-17)
   2844522321033.96973 ulp for y0(16.5009224415280897) = 2.00077829491426981e-16)
   2333638594749.43506 ulp for y0(22.7820280472915577) = 2.66037512102970827e-16)
   2201595246120.51953 ulp for y0(41.6291044662138106) = -3.20169212697064236e-16)
   1936221335903.71802 ulp for y0(13.3610974738727624) = -2.43100192307154975e-16)

<tr><td align=left><a href=y0.res>y0</a></td><td align=right>976</td><td align=right>1129971635514619.75000</td><td>0.893576966279167495</td><td>-2.6871273218695424e-17</td></tr>