Christoph Hormann schrieb:
> Rich wrote:
> 
>> Has anyone tried to compile 3.5 with 64bit optimizations?  I have a 
>> new PC with an AMD64 3200+ cpu (running Windows XP64) and I'm dying to 
>> see what this thing can do in native 64bit mode.

> In general POV-Ray compiles on 64bit systems but it won't be faster (in 
> most cases even slower).  The main advantage would be to be able to 
> address more than 4GB of memory.

I couldn't believe this and did some testing with my own compilations of 
POVRay.

I compile POVRay on my new AMD64 Box running Suse 9.0 for AMD64. One 
time with -m32 (using 32Bit mode of the processor) and one with -m64 
(using 64Bit mode of the processor)

I have tested the different binarys with this

povray -d -q9 +w800 +h600 +b1000 +r3 +a0.300 +ft 
-i[povray-dir]/scenes/advanced/chess2.pov -L[povray-dir]/include

commandline. I used always the -msse2 option to enable the sse2 Unit in 
the processor. So here are the results:

GCC 3.3.1 with -m32 -mcpu=k8 -msse2
   3:26
GCC 3.3.1 with -m64 -mcpu=k8 -msse2
   2:59

GCC 3.4.0 with -m32 -mcpu=k8 -msse2
   3:08
GCC 3.4.0 with -m64 -mcpu=k8 -msse2
   2:47

I will also try to compile POVRay with the ICC 8.0 under Linux if I can 
bring the compiler to work.

-- 

mat### [at] matweide
http://www.matwei.de

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