== 0) { x &lt&lt= 32; cnt += 32; }
	   if ((x &gt&gt 48) == 0) { x &lt&lt= 16; cnt += 16; }
	   ... </pre>
<li> IRIX 6 MIPSpro compiler has an <code>__inline</code> which could perhaps
     be used in <code>__GMP_EXTERN_INLINE</code>.  What would be the right way
     to identify suitable versions of that compiler?
<li> IRIX <code>cc</code> is rumoured to have an <code>_int_mult_upper</code>
     (in <code>&lt;intrinsics.h&gt;</code> like Cray), but it didn't seem to
     exist on some IRIX 6.5 systems trie