An Instruction Folding Solution to a Java Processor Based on FPGA

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An Instruction Folding Solution to a Java Processor Based on FPGA

更新时间：2026-09-04

- An Instruction Folding Solution to a Java Processor Based on FPGA
- Vol. 28, Issue 5, Pages: 166-170(2011)
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- Published：2011
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基于FPGA的Java指令折叠器的研究与设计[J]. 微电子学与计算机, 2011, 28(5): 166-170,175.

An Instruction Folding Solution to a Java Processor Based on FPGA[J]. 2011, 28(5): 166-170.
基于FPGA的Java指令折叠器的研究与设计[J]. 微电子学与计算机, 2011, 28(5): 166-170,175. DOI：

An Instruction Folding Solution to a Java Processor Based on FPGA[J]. 2011, 28(5): 166-170. DOI：

摘要

Java虚拟机的设计是基于堆栈的

它的性能由数据相关性而被限制.为了提高JVM的性能

于是sun公司提出了堆栈操作折叠机制并且用于picoJava Ⅰ、Ⅱ处理器

它折叠了42.3%的堆栈操作.通过把连续的字节码与预先定义的类型在指令译码器中对比

那么push、pop操作的数量就能被减少.文中为Java处理器设计了一种简单的指令折叠器

最终在FPGA上加以实现

从而大大地提高了JVM的性能.

Abstract

The execution performance of a stack-based Java virtual machine (JVM) is limited by the true data dependency.To enhance the performance of the JVM

a stack operations folding mechanism for the picoJava-Ⅰ/Ⅱ processor was proposed by Sun Microsystems to fold 42.3% stack operations.By comparing the continuous bytecodes with predefined folding patterns in instruction decoder

the number of push/pop operations in between the operand stack and the local variable could be reduced.In this paper

a simple instruction folding algorithm is proposed for a Java processor.It is achieved on the FPGA

which greatly improve the performance of JVM.

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