Re: [rfa/mips] Second go at vr5500 hilo hazard fix

Andrew Cagney
2004-03-26T00:28:09Z

> At Thu, 25 Mar 2004 17:14:18 -0500, Andrew Cagney wrote:
>
>>> Look at it this way, if the igen mechanism is used, gcc is able to
>>> eliminate everything :-)
>
>
> In the case of a single-architecture sim (i.e., not 'multi', then
> yes), GCC will automatically eliminate the test.
>
> In the case of a multiple-architecture sim, it won't.

It still does (or at least can), trust me :-)

> But (a) at
> least in my mind, i'm not worried about absolute maximal performance
> from that configuration (if you want max performance, build a single
> arch sim), and (b) until somebody quantifies the difference, I'll
> claim that i don't believe it'll be a measurable difference. 8-)

But yes, you won't measure the difference.

Andrew