Intel® Fortran Compiler
Build applications that can scale for the future with optimized code designed for Intel® Xeon® and compatible processors.
Announcements
FPGA community forums and blogs on community.intel.com are migrating to the new Altera Community and are read-only. For urgent support needs during this transition, please visit the FPGA Design Resources page or contact an Altera Authorized Distributor.
29285 Discussions

ifc anomaly

yogvjosh
Beginner
‎06-10-2003 04:14 PM
593 Views
Hello users,

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



http://www.ccl.net/cgi-bin/ccl/message.cgi?2003+06+09+006

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

Thanks
Yogesh
0 Kudos

Link Copied

1 Reply
Steven_L_Intel1
Employee
‎06-10-2003 05:36 PM
593 Views
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.

Steve
0 Kudos
Copy link
Reply

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

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