icpc directives and attributes

[jeff_keasler]

Hi,

Can you point me to the best available documentation resources for Intel C/C++ compiler directives (i.e. declspec) and compiler attributes? I need a resource that is comprehensive and will also includes Intel specific features such as __assume_aligned and the intel specific aligned malloc call (alignment, offset, size?).

I'm trying to get the most out of AVX because I am seeing a lot of extraneous assembly language instructions being generated by the compiler.

Thanks,
-Jeff

[SergeyKostrov]

Hi Jeff,

I can't suggest anything better than:

http://software.intel.com/en-us/articles/intel-software-technical-documentation/
http://software.intel.com/en-us/articles/intel-c-compiler-for-windows-kb/all/1/
http://software.intel.com/en-us/articles/intel-c-compiler-for-linux-kb/all/1

and

MSDN

What problems do you have with'malloc' CRT-function?

Best regards,
Sergey

[Om_S_Intel · Accepted solution]

On Windos, Intel C++ compiler is striving to be compatible with Microsoft C++ compiler. You may refrer MSDN documentation for this.

On Linux, Intel C++ compiler is striving to be compatible with GNU compiler. You may refrerGNU documentation for this.

Some of the pramas are special to Intel C++ compiler. These are described is Intel C++ compiler user's guide.

[jeff_keasler]

Quoting Om Sachan (Intel)

On Windos, Intel C++ compiler is striving to be compatible with Microsoft C++ compiler. You may refrer MSDN documentation for this.

On Linux, Intel C++ compiler is striving to be compatible with GNU compiler. You may refrerGNU documentation for this.

Some of the pramas are special to Intel C++ compiler. These are described is Intel C++ compiler user's guide.

In the C++ compiler user's guide, is all the information isolated in a single section somewhere? I can't find such a place.

It would be nice if there were a special Intel optimization document that consolidated all the pragmas, directives, attributes, intrinsics, and Intel specific features in one place. It could probably be quickly pieced together from the voluminous Intel documentation in a few hours for someone at Intel who is expert in low level architure and compiler details and familiar with the vast array of documentation sources.

-Jeff

[Sukruth_H_Intel]

This documentation http://software.intel.com/sites/products/documentation/hpc/composerxe/en-us/cpp/mac/index.htm#optaps/common/ Would give a good idea about the Pragmas, Optimizations, Intrinsics...

Is this helpful?

Thanks & Regards,
Sukruth H.V

[Mark_S_Intel1]

Two other references that may be helpful are:

Intel Compiler Quick Reference Guide

A Guide to Auto-vectorization with Intel C++ Compilers

--mark