145    UInt   n, bitoff, op;  in main()  local
158       bitoff = (random() % 1600) - 800;  in main()
162          case 0: c = btsl_mem(block, bitoff); break;  in main()
163          case 1: c = btrl_mem(block, bitoff); break;  in main()
164          case 2: c = btcl_mem(block, bitoff); break;  in main()
165          case 3: c = btl_mem(block, bitoff); break;  in main()
168       carrydep = c ? (rol1(carrydep) ^ bitoff) : carrydep;  in main()
188       bitoff = (random() % 100) - 50;  in main()
192          case 0: c = btsl_reg(reg, bitoff, &reg); break;  in main()
193          case 1: c = btrl_reg(reg, bitoff, &reg); break;  in main()
194          case 2: c = btcl_reg(reg, bitoff, &reg); break;  in main()
195          case 3: c = btl_reg(reg, bitoff, &reg); break;  in main()
198       carrydep = c ? (rol1(carrydep) ^ bitoff) : carrydep;  in main()