[RFA/i386] Prec x86 MMX 3DNow! SSE SSE2 SSE3 SSSE3 SSE4 support

[Michael Snyder]

Hui Zhu wrote:
> Hi Michael,
> 
> I make a new testsuite that can support sse and sse4 better.
> 
> When the pc doesn't support sse4 insn, the test will skip the sse4 insn test.
> 
> Please help me review it.

Hui,

I found out that older versions of GAS require three arguments for 
blendvps and blendvpd -- and the first argument must be %xmm0.

Try this on your machine:

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