result of y0 is never more precise than double

20 largest ulp errors (stored in a double)
   53610894117217.56200 ulp for y0(35.346452305214321) = -2.3920994576257774e-17)
   46307269530692.07800 ulp for y0(25.922957653180923) = 3.5612243790574596e-17)
   18129364021924.53100 ulp for y0(47.911896331516481) = -2.1645944577750153e-17)
   6498130141085.27440 ulp for y0(29.064030252728397) = 1.3709880074957639e-16)
   2797356648243.43510 ulp for y0(22.782028047291558) = 2.6606037516818624e-16)
   2782593813623.44870 ulp for y0(51.053328552362359) = -3.4374333790421211e-16)
   2135872915459.50290 ulp for y0(32.205204116493277) = -4.5578339073670513e-16)
   2127084665021.53320 ulp for y0(32.205204116493285) = 5.4328160688482174e-16)
   2039649385205.46170 ulp for y0(25.922957653180919) = -5.2127082036967012e-16)
   2034193843270.82250 ulp for y0(44.77048660722199) = -3.7301848235836133e-16)
   1585258070662.48410 ulp for y0(54.194779361087051) = 4.0973083211858428e-16)
   1432999885995.67770 ulp for y0(29.064030252728401) = -3.8883171111466937e-16)
   1302663443600.83890 ulp for y0(22.782028047291561) = -3.279719720056879e-16)
   1273829899337.63870 ulp for y0(44.770486607221997) = 4.7432767505765832e-16)
   1253057097700.31860 ulp for y0(54.194779361087058) = -3.6037699780350871e-16)
   1159684328409.48070 ulp for y0(41.629104466213811) = -3.2033493657505578e-16)
   891213381772.49072 ulp for y0(35.346452305214314) = 9.2971768214389702e-16)
   875735167160.48303 ulp for y0(38.487756653081533) = -5.4588180047553243e-16)
   707346657133.06372 ulp for y0(51.053328552362366) = 4.4965580338695542e-16)
   623988097280.19482 ulp for y0(57.336245704766277) = -3.4556708752070266e-16)

<tr><td align=left><a href=y0.res>y0</a></td><td align=right>976</td><td align=right>53610894117217.56200</td><td>35.346452305214321</td><td>-2.3920994576257774e-17</td></tr>