PROCESSOR AND METHOD FOR DATA PROCESSING

摘要

PURPOSE:To provide the data processor and data processing method which eliminate the overhead of a process for branch condition execution in arithmetic of data with different bit width and also reduces instruction code allocation to the same function. CONSTITUTION:The data processor is equipped with an instruction decoding part 103 which decodes instructions, a computing element 104 which performs the arithmetic of N(N: integer)-bit width data according to the instruction decoding result, plural flag groups 3 and 4 which include flags set corresponding to the different bit width data on the basis of the arithmetic result obtained by the computing element 104, selectors which select a specific flag group between the flag groups 3 and 4 according to the indication of a conditional branch instruction, and a branch judgement part 7 which judges whether or not the branch conditions is met by referring to the selected flag group.