[Debian-ppc64-devel] I am planning to restart ppc64 ports project

[Paul Mackerras]

On Mon, Oct 04, 2010 at 08:32:54PM -0700, Brian Morris wrote:

> If you are using double precision floating point, the speed of a
> program compiled 32bit on a 64bit machine is much much slower (maybe
> 1/10). The 64bit kernel supports 64bit operation Only if the program
> is compile 64 bit ! Moreover with any app there are library calls.

The kernel supports 64-bit *integer* operations only in a 64-bit
process.  64-bit floating-point is supported in 32-bit processes,
in fact it's supported on 32-bit kernels on 32-bit machines as well.

Paul.