3.0 vs 3.0.1 on oopack's Max

[Richard Henderson]

On Fri, Sep 07, 2001 at 03:41:49PM +0200, Paolo Carlini wrote:
> once more, I'm writing to the list to describe a recent performance
> regression :( on a simple benchmark.

You didn't mention how the compiler was configured, 
or what options you gave for compilation.

The performance regression is caused by

3.0:
>  8048912: 31 d2                 xor    %edx,%edx
>  8048919: 0f 97 c2              seta   %dl
>  804891c: 85 d2                 test   %edx,%edx

3.0.1:
>  8048917: 0f 97 c0              seta   %al
>  804891a: 83 e0 01              and    $0x1,%eax

The 3.0.1 version has a partial register stall on %al.



r~