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From: "Rod Pemberton" <dont_use_email@xnothavet.cqm>
Newsgroups: comp.lang.forth
Subject: Re: Can gforth make excutibles for linux that don't need gforth interpeter?
Date: Sun, 11 May 2014 11:32:17 -0400
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On Sun, 11 May 2014 01:24:04 -0400, Melzzzzz <mel@zzzzz.com> wrote:
> On Sat, 10 May 2014 21:15:57 -0400
> "Rod Pemberton" <dont_use_email@xnothavet.cqm> wrote:

>> You also need to take into account that GCC is not known
>> for producing especially fast compiled C code, as compared
>> to other C compilers, like OpenWatcom.
>
> Hm, that was true perhaps 10 years ago but now I see that
> gcc is able to vectorize where icpc and clang can't...
> Eg
> void init_cumul()
> {
>   for(int k=0;k<N;k++)
>     array[k]=k/3+k;
> }
> gcc 4.8 and later are able to vectorize while intel icc
> 13.1.1 and clang 3.5 can't...
>

My recently installed, up-to-date, Linux is only up to 4.5.2 ...

I.e.,
1) How many versions of Linux have the most recent GCC?
2) How many people have the latest and greatest GCC?
3) How little does vectorization improve general C code?

The version of GCC which I mainly use is 3.4.1 (DJGPP for DOS).
The area which I consider GCC to be especially weak is characters.
The older v1.3 OpenWatcom dramatically outperforms GCC 3.4.1 here.
Maybe, that's fixed in 4.x series somewhere, but OW is many
versions past that too, now.  They would likely need to update
GAS to support the entire x86 instruction set, instead of the
limited subset GCC uses (if they haven't already).

Anyway, we're off the topic of getting Gavino to think about
stuff prior to posting random thoughts, researching some answers
for himself, or researching responses for himself to counter my
"radical" claims.


RP
P.S. "... versions of Linux ..."  What's the plural of Linux?