Re: [boost] Solaris versions of sp_counted_base and atomic_countby Michael van der Westhuizen

From: Tomas Puverle (Tomas.Puverle_at_[hidden])
Date: 2006-07-04 13:28:22

> Could you send the sunpro versions to me (or the list) please? I'll
> see what I can do about getting them into asm() blocks in the morning.

I have tried and tried a while ago. :)  My conclusion was that unfortunately  
register allocation doesn't play nicely with inlining.  Also, returning a 
parameter is REALLY hard to do and I wasn't able to get it to work in the 
general case.  The atomics for sunpro are pretty much identical to the gcc 
version, however, because the asm() block is inserted at a different stage of 
compilation than the .il file, the block doesn't recognise the synthetic 
instructions such as cas or casx.  You will need to use the real version of 
the instruction, which is CASA and CASXA, so your asm block will look like 
this (if my memory serves me well):

//32-bit
  asm("casa (%reg) #ASI_PRIMARY_BIG, %compareReg, %swapReg")

//64-bit
  asm("casxa (%reg) #ASI_PRIMARY_BIG, %compareReg, %swapReg")

If you can get this to work, I'd love to hear back from you becase I 
absolutely loathe the .il model.  It really makes it difficult to write libs, 
because you have to do special magic to add the .il to the compile line when 
your library gets included.

Tom