Hello,
Le jeudi 28 janvier 2010 à 08:55 +0100, Bastian Blank a écrit : > On Thu, Jan 28, 2010 at 12:39:31AM +0100, Sylvestre Ledru wrote: > > Atlas is an auto-optimized library. At the beginning of the script, > > atlas launch a script to check what is the CPU architecture, the > > optimisation available, etc. > > Which different optimizations are available for s390? I don't think there is any. It is mainly about x86 and amd64. > > > One of the first check is the CPU. It is done in ASM. > > Why does it need to be done in assembler? I don't know. It is the way it is currently done with Atlas. > > For example, the code for x86 is: > > -------- > > movl 4(%esp), %eax > > movl %eax, %ecx > > shl $1, %eax > > addl %ecx, %eax > > This code does nothing really usefull except for the stack access, why > is it written in assembler at all? But this does not in any way help > with detecting the CPU type. > > > I would like to know if someone could translate that for me to s390 ? > > Why does this tool not have a common implementation in a common language > like C to start with? Good question... I can try to do that. I was just trying to match the current upstream behavior first. Sylvestre -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
