I can use memcpy(). I wanted to copy more than few pages, So I was wondering if we can use mmx/sse since the operands would be 128/64 bits and there are ways not to pollute the Cache... Can u give me hints on how this shud be done? (Is MOVUPD Mem -> Reg followed by MOVUPD Reg -> Mem the only way? Or is there any better ways of doing this?) Maybe we can change memcpy() to make use of mmx/sse2 if it is really worth it? -----Original Message----- From: Arjan van de Ven [mailto:arjanv@redhat.com] Sent: Wednesday, December 10, 2003 11:59 PM To: Sivasankaran, Vijay Cc: kernelnewbies@nl.linux.org Subject: Re: Move huge chunks of data in kernel... On Thu, 2003-12-11 at 00:18, Sivasankaran, Vijay wrote: > Hello, > > Anyone know how to move move huge chunks of data in x86 kenel? > I know I can use %esi and %edi as source and destination and > use ecx to specify the number of bytes. I am wondering if there > is any better way of doing it using SSE2 (128 bit) registers? > Imagine we don't have to worry abt context-switching or saving > registers why don't you use memcpy() which will be optimized for your platform ? (and yes it can use mmx/sse2 etc if it is faster (which it btw not really is unless you use weakly ordered stores, which have the side-effect of clearing the cache so are not generally a win) -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
