27 Nov
2003
27 Nov
'03
3:14 p.m.
On Thu, 2003-10-16 at 19:19, Robert Jonsson wrote:
weapon the compiler can use to optimize code. Athlon64
remedies this by
doubling the size (32->64) and the amount (8->16) of all integer registers.
SSE also have double the amount of registers which (i think) benefits
floating point work (if the compiler supports it).
With Opteron/Athlon64 it's _very_ important to use SSE/3DNow optimized
asm code. There are _major_ speed differences between the code generated
by C/C++ compilers and handwritten assembly code.
For some DSP routines the speed difference seems to be about 10x.
--
Jussi Laako <jussi.laako(a)pp.inet.fi>