Request for review (L): 6797305: Add LoadUB and LoadUI opcode class

[Christian Thalinger]

On Thu, 2009-02-26 at 09:02 -0800, Tom Rodriguez wrote:
> As far as sparc goes I wouldn't mind if they were changed to use the  
> MacroAssembler too.  Someday we'd like to convert all the inc_encodes  
> to use MacroAssembler.

Hmm, I don't know how to do it properly on SPARC.  There are only two
(three) versions of emit functions:

ldsb(  Register s1, Register s2, Register d)
ldsb(  Register s1, int simm13a, Register d)

(And this one:

ldsb( const Address& a, Register d, int offset )
)

I tried something like that:

  ins_encode %{
    __ ldsb($mem$$base$$Register, $mem$$disp, $dst$$Register);
  %}

but that does work (I know the $$Register is wrong).  The question is:
would it be correct to use $mem$$base and $mem$$disp and assume $mem
$$index and $mem$$scale are zero or not used?

-- Christian