Re: [patch] MIPS gas problems with gcc's explicit relocs

[Thiemo Seufer <ica2_ts at csv dot ica dot uni-stuttgart dot de>]

Zack Weinberg wrote:
> Thiemo Seufer <ica2_ts@csv.ica.uni-stuttgart.de> writes:
> 
> > Maciej W. Rozycki wrote:
> > [snip]
> >> 	asm("dla\t%0,%1" : "=r" (result) : "m" (foo));
> > [snip]
> >> 	lui	$2,%highest(foo)
> >> 	daddiu	$2,$2,%higher(foo)
> >> 	dsll	$2,$2,16
> >> 	daddiu	$2,$2,%hi(foo)
> >> 	dsll	$2,$2,16
> >> #APP
> >> 	dla	$2,%lo(foo)($2)
> >> #NO_APP
> >
> > IMHO this is broken in the compiler. It should either only provide the
> > sympol for %1, or handle the dla expansion correctly, preferably with
> > better optimization for superscalar processors (that is, a
> > lui - lui - daddiu - daddiu - dsll32 - daddu sequence).
> 
> Huh? This is an asm statement; the compiler has no idea that it's a
> dla instruction.

AFAICS it tries to alter it.


Thiemo