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awoolley
Joined: 12 Jan 2007 Posts: 3
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Posted: Thu Feb 01, 2007 4:10 pm Post subject: 64-bit processor /optimise problem |
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Hi,
I am trying to compile a program with v5.01 using the /OPTIMISE compiler option on a 64-bit processor.
The program works fine on a 32-bit processor (Dell OPTIPLEX GX270 Intel(R) Pentium(R) 4 CPU 2.60GHz), but when I try to run it on a 64-bit xp machine (processor: Dell Precision PWS390, Intel(R) Core(TM)2 CPU 6400@2.13 GHz), the program fails with a floating point stack overflow. This only happens when the code is compiled using /OPTIMISE, and the program runs fine on both machines when compiled using /DEBUG.
I'm afraid the code is too big to post here, but it's pretty old fortran. I can't seem to reproduce the problem with test code.
Has anyone had similar problems using an Intel 64-bit processor? Any suggestions would be appreciated.
Thanks,
Alice |
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PaulLaidler Site Admin
Joined: 21 Feb 2005 Posts: 7916 Location: Salford, UK
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Posted: Thu Feb 01, 2007 6:25 pm Post subject: |
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If you have to use /OPTIMISE, try applying it to one file at a time in order to begin to locate the problem.
Alternatively, apply /OPTIMISE all files but one to see if the problem goes away (varying the one that is not optimised). |
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