116 	r6 = 1;  define
117 	r6 <<= r7;
125 	r5 = r7 & r6;
126 	r7 = ~r6;
129 	r7 = r7 | r6;
155 	r6 = 1;  define
156 	r6 <<= r7;
164 	r5 = r7 & r6;
167 	r6 = ~r6;  define
168 	r7 = r7 & r6;
216 	r6 = r1 & r2;  define
235 	cc = r6 == 0;