Intel compiler

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mathematician
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Intel compiler

Post by mathematician »

Does anybody know anything about the Intel C++ compiler? It is available for free if you are going to use it for non-commercial use. Admittedly only in its Linux version, but if you are not going to be making any OS system calls, that shouldn't matter too much.
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Re: Intel compiler

Post by Solar »

mathematician wrote:Does anybody know anything about the Intel C++ compiler?
It's called icc.

Seriously, what do you want to know? It had been known to generate up to 20% more efficient code than GCC back when GCC 3.something was current. Dunno if that is still the case, or how much.
Every good solution is obvious once you've found it.
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Post by JamesM »

We have CDs with that compiler on at work, and yet still use GCC. So I have to assume that the current version of GCC is faster!
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Post by Candy »

JamesM wrote:We have CDs with that compiler on at work, and yet still use GCC. So I have to assume that the current version of GCC is faster!
No you don't :)
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Post by JamesM »

Why?
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Post by Candy »

JamesM wrote:Why?
What if there's another reason they're not using ICC? Say, licenses, target compatibility (cpu), warning quality, platform support (OS), moral objections, financial objections...
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Post by Craze Frog »

http://www.principledtechnologies.com/C ... mpComp.pdf
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Post by bewing »

I'd really love to take some of my asm code, translate it into nice C, and run it through both the Intel compiler and GCC optimized. Somehow, I really doubt the compilers are going to come within a factor of 5 of hand coded compilation. If that is so, then any 20% efficiency advantage of one over the other is meaningless.
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Post by Candy »

bewing wrote:I'd really love to take some of my asm code, translate it into nice C, and run it through both the Intel compiler and GCC optimized. Somehow, I really doubt the compilers are going to come within a factor of 5 of hand coded compilation. If that is so, then any 20% efficiency advantage of one over the other is meaningless.
The average modern day compiler (GCC 4.x) can outperform handwritten ASM if you're not careful.
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