Method for expanding capacity of register files of processor

A register file and processor technology, applied in machine execution devices, memory address/allocation/relocation, concurrent instruction execution, etc., can solve problems such as limited number of registers

Inactive Publication Date: 2015-03-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among these registers, except the program counter, stack pointer register, link register and other regist

Method used

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  • Method for expanding capacity of register files of processor
  • Method for expanding capacity of register files of processor
  • Method for expanding capacity of register files of processor

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] The method of the present invention is aimed at an instruction set that supports conditional execution (such as an ARM instruction set or an instruction set with similar coding characteristics to the ARM instruction set), and the instructions can be executed conditionally or unconditionally. In conditional execution, the conditional AL (always) means to execute forever, which is the same as the result of unconditional execution, but the instruction encoding of these two instructions is not the same.

[0020] Using this feature, the AL condition of conditional execution is used as the selection information of the register file. When the instruction is non-conditional execution or other conditional execution except AL, select the register file S0; when the instruction is conditional execution and the condition is AL, select Extended register file S1, at the same t...

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Abstract

The invention discloses a method for expanding capacity of register files of a processor and mainly solves the problem of register capacity limitation. The method includes: judging whether an instruction is a conditional instruction or a non-conditional instruction; if the instruction is a conditional instruction and the condition is AL, selecting an expanding register file S1; if the instruction is a non-conditional instruction, selecting an expanding register file S0; if the instruction is the conditional instruction but the condition is not AL, selecting the expanding register file S0. The method for expanding the capacity of the register files of the processor aims at instruction sets supportive to conditional execution and is completely compatible to applications of an original processor with no modification of original instruction sets.

Description

technical field [0001] The invention relates to a method for expanding the register file capacity of a processor. Background technique [0002] Traditional computer hierarchical storage systems use registers and high-speed caches to bridge between ALU and memory, successfully solving the problem that the access speed of memory does not match the computing speed of the processor. Among them, the register can perform fast communication with the ALU, provide operands for the ALU and save calculation results. [0003] Pipeline technology is often used in the current processor architecture design. Taking the design of a typical 5-stage pipeline RISC processor as an example, in the instruction fetching stage, the instruction is read from the instruction memory according to the value of the program counter and stored in the instruction register. In the process, the address of the next instruction is calculated at the same time; in the decoding stage, the instruction is decoded, an...

Claims

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Application Information

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IPC IPC(8): G06F12/08G06F9/38
Inventor 侯毓敏何虎
Owner TSINGHUA UNIV
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