Data processing method and device

Abstract

The embodiment of the invention discloses a data processing method and device.The method comprises the steps of obtaining a data operation instruction, wherein the data operation instruction comprises a destination address, an operation bit and an operation mode, the destination address is the address of a target register, and the operation bit is the bit for operation in the target register; determining an operation address according to the destination address and the operation mode, and generating target data according to the operation bit; and writing the target data into the operation address. According to the method and the device, the target data is written into the operation address to operate the bits in the target register, the value of the register can be changed through one-step operation, the register does not need to be subjected to three-step operation of reading, changing and writing, the atomicity of register operation is ensured, and the efficiency of register operation is improved.

Description

Technical field [0001] The present application relates to the field of registers, and more particularly to a data processing method and apparatus. Background technique [0002] With the rapid development of the semiconductor, multiple modules, multiple subsystems, multiple threads, even multiple operating systems access the same register, more and more. Under normal circumstances, modifying a register requires reading, change, writing three steps to complete, the computer system is difficult to ensure atomicity for such registers (atomicity: referring to the inexability of the transaction, all the operations of a transaction either Not intermittently executed, or one is not executed), so such register operation can affect operational efficiency (three steps to complete the modification of the register value), can not guarantee atomicity of the register operation, If the operation is interrupted, it may cause some unpredictable impact on the computer system. For example, when ther...

AI Technical Summary

Problems solved by technology

In general, modifying a register requires three steps of reading, modifying, and writing. It is difficult for a computer system to guarantee the atomicity of operations on such registers (atomicity: refers to the indivisibility of a transaction, all operations of a transaction are either All are executed without interruption, or none of them are executed), so this register operation method will affect the operation efficiency (three steps can complete the modification of the register value), and cannot guarantee the atomicity of the register operation. At the same time, if the If the operation is interrupted, it may cause some unexpected effects on the computer system

For example, when two subjects (such as two CPUs, two subsystems, two threads, etc.) need to write to the same register at the same time, if the second subject's read step occurs in the first subject's write step After completing the before and read steps, the execution result of the first body will be overwritten by the execution result of the second body, which will lead to problems such as data confusion

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