Re: [RFC] Simplify SIMD registers

[Elena Zannoni <ezannoni@redhat.com>]

Elena Zannoni writes:
 > Martin M. Hunt writes:
 >  > On Fri, 26 Apr 2002, Elena Zannoni wrote:
 >  > 
 >  > > Now, I have concerns for platforms other than Altivec, that may have
 >  > > used a representation like the one I would like to abandon.
 >  > > I am talking about SSE regs on x86 which are v4sf type. Right?
 >  > 
 >  > SSE registers are v4sf only, but SSE2 registers (Pentium 4) are
 >  > v2df, v4sf, v16qi, v8hi, v4si, and v2di. I don't believe GDB supports 
 >  > them yet.
 >  > 
 > 
 > Ah ok, so those could be supported w/o structure wrappers. But the
 > debug format is only stabs on x86, and we don't set the flags for those
 > types to TYPE_VECTOR. If we did that we could avoid the structures.
 > 

No sorry, what I just said is nonsense, we can always set the
TYPE_VECTOR flags for the register types because it is set by gdb
itself.  Do these vectors on x86 appear also as variables? I mean,
would there be a function that takes a vector as parameter, for
instance? (In that case we would need to deal with stabs debug info).

Elena