~90% of the JVM instruction set are simple RISC instructions, the rest is object maintenance. Writting a JVM is like writting an emulator for a simple CPU/platform.
True until Java 7, not so with all the newer bytecodes.
Simple Open-Source Java Virtual Machine in C
11–14 of 14 posts
Re: Simple Open-Source Java Virtual Machine in C
#12~90% of the JVM instruction set are simple RISC instructions, the rest is object maintenance. Writting a JVM is like writting an emulator for a simple CPU/platform.
It makes perfect sense at the time Sun is naming it JVM, apparently technically it's a VM. That meant they have had a valid claim to "write once, run anywhere" mantra. It's a shame that in reality it turned out later to be "write once, debug everywhere" kind of nightmare.
Re: Simple Open-Source Java Virtual Machine in C
#13I so wish I could read that source code. For an amateur like me, it is so phenomenal :)
Re: Simple Open-Source Java Virtual Machine in C
#14I tried to get it to run Peter Norvig's JScheme [1]. Apparently I also need a class library like GNU classpath?
DISCLAIMER: not a Java expert or even practitoner.