Re: x86 inc/dec on core2

[Uros Bizjak]

H. J. Lu wrote:

inc/dec has the same performance as add/sub on Core 2 Duo. But
inc/dec is shorter.
 
      
What about partial flag register dependency of inc/dec?
    

There is no partial flag register dependency on inc/dec.
  

My docs say that "INC/DEC does not change the carry flag". But you have 
better resources that I, so if you think that C2D should be left out of 
X86_TUNE_USE_INCDEC, then the patch is pre-approved for mainline.

Thanks,
Uros.