| 摘要 |
A semiconductor device capable of easily processing data different in length, and an electronic arrangement incorporating the semiconductor device. The semiconductor device comprises input means for fetching unpacked input data, a register having a flag to be set at the processing of unpacked data, and an ALU capable of processing data, different in length. When the flag is set to the above register and the current instruction indicates the processing of short-length data, the ALU processes data having half the length of the input data and sets a carry signal for high-order bits of the data to a carry flag. For example, even when the ALU has the function to process 16- and 8-bit data, it is able to process 4-bit data when the 8-bit data processing is selected and an unpacking flag is set. |
