Some Pentium III instructions not accessible from gas

[Steve Underwood]

Hi,

Unless I am missing something, there are a bunch of instructions in the
Pentium III and IV which gas (2.10.1) cannot generate. These are the xmm
enhanced versions of the original MMX instruction set - things like:

        pmaddwd %xmm0,%xmm1

The original Pentium MMX, 64 bit register versions, like:

        pmaddwd %mm0,%mm1


are OK, but it seems the xmm versions didn't get added when the
completely new SSE instructions were. I assume I cannot be the first to
find this. Is anyone addressing the issue? Should I?

Regards,
Steve