[postgis-devel] [PostGIS] #703: measures test failure

PostGIS trac at osgeo.org
Mon Dec 13 08:37:39 PST 2010


#703: measures test failure
---------------------+------------------------------------------------------
 Reporter:  strk     |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  medium   |   Milestone:  PostGIS 2.0.0
Component:  postgis  |     Version:  trunk        
 Keywords:           |  
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Comment(by mcayland):

 Looks like you're being caught by the difference in 80-bit hardware
 floating point and software 64-bit floating point - since the hardware
 (i.e. registers) hold more precision then you can get different results
 depending upon whether you're working with a number in memory or in a
 register.

 Google -ffloat-store for more information, plus also strk has some
 experience with this in GEOS.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/703#comment:12>
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