result of asinh is never more precise than double

3 results were exact to double the precision

20 largest ulp errors (stored in a double)
   0.50065 ulp for asinh(-0.47782513820001038) = -0.46129060092659302)
   0.50047 ulp for asinh(-0.426553727999999965) = -0.414575538595921222)
   0.50038 ulp for asinh(0.107421759000000949) = 0.107216226776095103)
   0.50038 ulp for asinh(0.172532982599999773) = 0.171688266721786609)
   0.50036 ulp for asinh(0.686114334799933556) = 0.641253886737813028)
   0.50034 ulp for asinh(0.294157668400036376) = 0.290072631770176892)
   0.50032 ulp for asinh(-278.138884199980339) = -6.32127098453032588)
   0.50030 ulp for asinh(-0.618849087000004627) = -0.584920516139458169)
   0.50029 ulp for asinh(0.196586753200000519) = 0.195342053569413865)
   0.50027 ulp for asinh(0.686114334798209602) = 0.641253886736391499)
   0.50026 ulp for asinh(0.350766107599771559) = 0.343944565738450558)
   0.50025 ulp for asinh(0.376358749799980963) = 0.367996556934930164)
   0.50022 ulp for asinh(-2.3905798039999766) = -1.60580868904244412)
   0.50021 ulp for asinh(0.125325775241124954) = 0.125000000000009437)
   0.50021 ulp for asinh(-718.471698797953763) = -7.27027398032374172)
   0.50021 ulp for asinh(-0.415908416800001401) = -0.404765090976104802)
   0.50020 ulp for asinh(0.672688602200022912) = 0.630148705881596216)
   0.50020 ulp for asinh(-7.37027542199957786) = -2.69517308149917056)
   0.50020 ulp for asinh(0.376358749799926395) = 0.367996556934879093)
   0.50019 ulp for asinh(-915.123739200009595) = -7.51220676931516351)

<tr><td align=left><a href=asinh.res>asinh</a></td><td align=right>1042</td><td align=right>0.50065</td><td>-0.47782513820001038</td><td>-0.46129060092659302</td></tr>