Re: [PATCH]: R10000 Needs LL/SC Workaround in Gcc

["Maciej W. Rozycki" <macro@linux-mips.org>]

On Sat, 1 Nov 2008, Richard Sandiford wrote:

> There are two ways we could handle this:
> 
>   - Make -mfix-r10000 require -mbranch-likely.  (It mustn't _imply_
>     -mbranch-likely.  It should simply check that -mbranch-likely is
>     already in effect.)
> 
>   - Make -mfix-r10000 insert nops when -mbranch-likely is not in effect.

 If I recall right, these is something special about the pipeline in this 
context making the branch-likely instructions the only ones that work.  
Which would make the option you proposed first the only viable.  I am not 
absolutely sure and I have no reference handy.  Perhaps Ralf or someone at 
linux-mips will know?

  Maciej