On 06/10/10 01:30 PM, Sergey Bochkanov wrote:
Hello, David
You wrote 10 июня 2010 г., 15:25:03:
It would be great if you could check your code with the Sun Studio
compiler, which you can get for free for Linux or Solaris.
It is not great, it is must-have. Building ALGLIB on every platform
where SAGE builds and with every popular compiler is top priority for
me.
Sage builds on Solaris systems with SPARC processors. These will
never have SSE instructions, as the processor is completely
different to Intel/AMD. You can check if the system has a sparc
processor by detecting if __sparc__ is defined.
I have no experience with SPARC, but I've studied different CPU
architectures before starting this project. "Generic C" build with all
optimizations turned off should work on SPARC and other non x86 ISA's.
BTW, what compilers support this __sparc__ symbol?
Having checked again, __sparc is preferable. That is supported by gcc, g++, cc
and CC (the Sun compilers)
kir...@t2:[~] $ cat test.c
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv) {
#ifdef __sparc
printf("I'm a SPARC\n");
#endif
}
First on a Solaris 10 machine based on a Sun SPARC processor.
kir...@t2:[~] $ /opt/SUNWspro/bin/cc test.c
kir...@t2:[~] $ ./a.out
I'm a SPARC
kir...@t2:[~] $ /opt/SUNWspro/bin/CC test.c
kir...@t2:[~] $ ./a.out
I'm a SPARC
kir...@t2:[~] $ gcc test.c
kir...@t2:[~] $ ./a.out
I'm a SPARC
kir...@t2:[~] $ g++ test.c
kir...@t2:[~] $ ./a.out
I'm a SPARC
So both the Sun and GNU compilers support __sparc.
On another Solaris machine, but this time based on an Intel Xeon.
drkir...@hawk:~$ /opt/sunstudio12.1/bin/cc test.c
drkir...@hawk:~$ ./a.out
drkir...@hawk:~$ /opt/sunstudio12.1/bin/CC test.c
drkir...@hawk:~$ ./a.out
drkir...@hawk:~$ gcc test.c
drkir...@hawk:~$ ./a.out
drkir...@hawk:~$ g++ test.c
drkir...@hawk:~$ ./a.out
drkir...@hawk:~$ uname -a
SunOS hawk 5.11 snv_134 i86pc i386 i86pc
So I think __sparc will be ok on Solaris. It is defined on a SPARC system and it
is not defined on an Intel system.
One can run Linux on a SPARC too, but that is very very rare. I'm not aware of
any active development of any Linux distro for the SPARC processor.
I've also got machines running AIX, tru64, HP-UX and IRIX. None of the CPUs in
those sorts of machines would support SSE. Clearly there are many system which
will never support SSE, though Solaris SPARC is the most critical for Sage.
I doubt the Intel Itanium processors support SSE either, though I'm not 100%
sure of that.
Dave
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