确定特定的JDK方法是否通常具有内部实现 [英] Determining whether a particular JDK Method typically has an intrinsic implementation

问题描述

阅读OpenJDK源代码(我不反对)的简短内容是

Short of the reading the OpenJDK source code (which I'm not averse to) is there a reasonably comprehensive (or 'official') list of intrinsic operations within the Hotspot JVM (say for Intel)?

例如，确定是否最快的方法是什么 Math.abs() 通常会在任何使用位置直接转换为一些本机指令?

For example, what's the quickest way to determine whether Math.abs() will generally be converted directly to a few native instructions wherever it is used?

推荐答案

OpenJDK源代码的相关部分指出:

The relevant part of the OpenJDK source code states:

http://hg.openjdk.java.net/jdk8/jdk8/hotspot/file/87ee5ee27509/src/share/vm/classfile/vmSymbols.hpp#l581

这里是运行时和CI已知的所有内在函数."

所以我想这已经足够全面了！

So I suppose that's comprehensive enough!

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