gas replaces instructions on sparc

[Ilya Basin]

>> I have this in my .S file:
>>     clr  %o3
>> but in the compiled .o file I have:
>>     mov  %g0, %o3
>> Why does it happen?

EB> Because clr isn't a SPARC instruction, it's a "synthethic" instruction which 
EB> is a "or %g0,%g0," under the hood.  And mov isn't a SPARC instruction either, 
EB> it's also a "synthethic" instruction which is a "or %g0," under the hood.

I need to recreate the instruction that is disassembled by gdb like
this:
96 10 20 00    clr  %o3

But both "clr" and "or %g0,%g0" give me this:
96 10 00 00    mov  %g0, %o3


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