ifc anomaly

ifc anomaly

Hello users,

I saw following posting on comutational chemistry list (www.ccl.net)


I observed that on my platform (ifc 7.1 linux). Any comments ?


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For more complete information about compiler optimizations, see our Optimization Notice.

I'd expect code like that to have "anomolies" with optimization using any X86 compiler. Such sums are very sensitive to the use of extended-precision X87 registers and the order of operations.


Retired 12/31/2016

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