[Stackless] New 3 platforms for Stackless Python

[Christian Tismer]

Russ Cox wrote:

>>How can we save&restore registers fast?


Another hint: The product description at
http://www.expresslogic.com/procTX-powerpc.html

says:
""" PowerPC Optimizations

ThreadX optimizes context switching on the PowerPC. When context 
switching occurs inside of a ThreadX service call, only the registers 
preserved across function calls are saved as part of the thread's 
context. This is typically registers r14-r31.

A similar technique is used in interrupt handling.On the front end of 
interrupt service routines, only the compiler's scratch registers are 
saved initially (typically r0 and r3-r12). The full register set is 
saved only if thread preemption is required.
"""

I think this is a good guideline.

ciao - chris

-- 
Christian Tismer             :^)   <mailto:tismer at tismer.com>
Mission Impossible 5oftware  :     Have a break! Take a ride on Python's
Kaunstr. 26                  :    *Starship* http://starship.python.net/
14163 Berlin                 :     PGP key -> http://wwwkeys.pgp.net/
PGP Fingerprint       E182 71C7 1A9D 66E9 9D15  D3CC D4D7 93E2 1FAE F6DF
      where do you want to jump today?   http://www.stackless.com/


_______________________________________________
Stackless mailing list
Stackless at www.tismer.com
http://www.tismer.com/mailman/listinfo/stackless