Single-precision floating-point data storing method and processor

摘要

A single-precision floating-point data storing method for use in a processor including a register (71), which has a size that can store double-precision floating-point data, for storing double-precision floating-point data and single-precision floating-point data comprises writing input single-precision floating-point data to the high-order half of the register (71), and writing all zeros to the low-order half of the register (71) if a single-precision floating-point data process is specified.