result of Pix is never more precise than double

3 results were exact to double the precision

20 largest ulp errors (stored in a double)
   0.50000 ulp for Pix(-0.402499911601222171) = -1.26449076535694083)
   0.50000 ulp for Pix(-0.859377740199323004) = -2.6998147952687912)
   0.50000 ulp for Pix(-0.193720938600241782) = -0.608592277553038907)
   0.50000 ulp for Pix(-0.587555582993394943) = -1.84586030310771743)
   0.50000 ulp for Pix(0.297261439603055344) = 0.933874354852484712)
   0.50000 ulp for Pix(0.143596270198912052) = 0.451120987539797069)
   0.50000 ulp for Pix(0.878534741800358843) = 2.75999829076341285)
   0.50000 ulp for Pix(-0.620286544593580236) = -1.94868765161578916)
   0.50000 ulp for Pix(-0.160345431199462873) = -0.503740028692920117)
   0.50000 ulp for Pix(0.0788602522004207968) = 0.247746788973080279)
   0.50000 ulp for Pix(0.947947697000832701) = 2.9780655208851794)
   0.50000 ulp for Pix(-0.0349726054002504408) = -0.109869680202321518)
   0.50000 ulp for Pix(0.290196800597294857) = 0.911680136851723666)
   0.50000 ulp for Pix(0.294157668399192329) = 0.924123570040005116)
   0.50000 ulp for Pix(-0.13784236500043559) = -0.433044561238811243)
   0.50000 ulp for Pix(-0.696951496999841602) = -2.18953770288311089)
   0.50000 ulp for Pix(-0.477825138200535404) = -1.50113194387132975)
   0.50000 ulp for Pix(-0.681058815402102447) = -2.13960937112981187)
   0.50000 ulp for Pix(0.810735118402508448) = 2.54699949198057185)
   0.50000 ulp for Pix(-0.318250363599450359) = -0.9998130042863137)

<tr><td align=left><a href=Pix.res>Pix</a></td><td align=right>720</td><td align=right>0.50000</td><td>-0.402499911601222171</td><td>-1.26449076535694083</td></tr>