Method for accessing data cache and processor

The embodiment of the invention provides a method for accessing a data cache and a processor, and relates to the field of computers. According to the method and the processor, the range of data search can be narrowed, the access delay is reduced and the performances of the system are improved. A data register of the processor is a first-level cache, wherein the first-level cache comprises a private data cache and a shared data cache; the private data cache comprises a plurality of private caches and is used for storing private data of threads; the shared data cache is used for storing shared data among the threads; when data in the data register of the processor are accessed, data types of the data are determined according to additional flags, corresponding to the data, in physical addresses; the data types comprise the private data and the shared data; the threads corresponding to the data are determined according to the accessed data, and further data caches corresponding to the threads are accessed according to the threads and the data types, so that the data in the data caches are acquired. The embodiment of the invention is used for distinguishing the data caches and accessing the data caches.