hi Brian and Ian
thank you both for the helpful comments. I will
pursue further along the directions that you have
pointed out.
Qianqian
On 6/7/2010 1:22 PM, Brian Budge wrote:
My advice would be to get a good wrapper on SFMT (simd fast mersenne
twister), and create a differently seeded instance per thread. This
is likely much faster and produces better random numbers than drand48.
The code will then be portable as well.
Brian
On Mon, Jun 7, 2010 at 9:30 AM, Ian Lance Taylor<iant@xxxxxxxxxx> wrote:
gcc is only a compiler. It fully supports the C90 standard with
respect to compiler behaviour. It mostly supports the C99 standard;
exact C99 status can be found at http://gcc.gnu.org/c99status.html .
However, all these standards also specify library behaviour. gcc does
not include a library. gcc can be used with a POSIX compliant library
to support a full POSIX compilation environment, but gcc does not
itself provide a POSIX compliant library.
I believe that Windows has a POSIX mode but it is not the usual
Windows programming environment and I don't know how well it works.
As far as I know Mac OS X provides a POSIX library.
Ian
