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- Subject: Re: [ANN] LuaJIT-2.0.0-beta3
- From: Mike Pall <mikelu-1003@...>
- Date: Thu, 11 Mar 2010 20:48:40 +0100
King, Mike wrote:
> > I should mention that LuaJIT has special tuning for Atom.
> Where did you get information on tuning for the Intel Atom CPU?
"Intel 64 and IA-32 Architectures Optimization Reference Manual"
Chapter 12: Intel Architecture and Software Optimization
"The microarchitecture of Intel, AMD and VIA CPUs: An optimization
guide for assembly programmers and compiler makers"
Chapter 9: Intel Atom pipeline
Rules for Atom summarized: don't use x87, don't use LEA to replace
ADD, do use LEA to adjust ESP, don't mix PUSH/POP and [ESP] access,
avoid multiplies, division is deadly.