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iraf.net Issue #109

[2.16.1][linux] convolve does not work correctly

open open olebole opened this issue on 2017-10-20 · 1 comments

olebole commented on 2017-10-20

When running the original binary linux (32 bit) distribution of 2.16.1, the convolve task does not work properly:

vocl> convolve dev$pix pix.cnv "1. 1. 1.; 1. 0. 1.; 1. 1. 1." bound=wrap  
ERROR: floating point invalid operation  

With a self-compiled version (8c330867617f79c8e2790ef0c988324ef8760bc1) the convolve task finishes:

vocl> convolve dev$pix pix.cnv "1. 1. 1.; 1. 0. 1.; 1. 1. 1." bound=wrap  
vocl> imstat pix.cnv  
#               IMAGE      NPIX      MEAN    STDDEV       MIN       MAX  
              pix.cnv    262144     858.6     842.7   -32768.    32055.  

However this result is still different from what one gets on 64 bit:

vocl> convolve dev$pix pix.cnv "1. 1. 1.; 1. 0. 1.; 1. 1. 1." bound=wrap  
vocl> imstat pix.cnv  
#               IMAGE      NPIX      MEAN    STDDEV       MIN       MAX  
              pix.cnv    262144     860.5     804.5   -30822.    32055.  

olebole commented on 2017-10-21

On MacOSX, all tests show the result of the linux64 version, independently of

2.16.1 binary download or own compilation
32 or 64 bit
Yosemite, El Capitan or Sierra

This suggests, that the problem is Linux (32 bit) specific – and the problem exists already in the current 2.16.1 binary. I can reproduce it on Ubuntu 12.04, Ubuntu 14.04 and on Debian testing (others, I didn’t check yet).

Last updated on 2017-10-21