vm-implementation – Page 2

Why is the JVM stack-based and the Dalvik VM register-based?

January 1, 2023 by Tarik

There are a few attributes of a stack-based VM that fit in well with Java’s design goals: A stack-based design makes very few assumptions about the target hardware (registers, CPU features), so it’s easy to implement a VM on a wide variety of hardware. Since the operands for instructions are largely implicit, the object code … Read more

Java’s Virtual Machine and CLR

November 21, 2022 by Tarik

There are a lot of similarities between both implementations (and in my opinion: yes, they’re both “virtual machines”). For one thing, they’re both stack-based VM’s, with no notion of “registers” like we’re used to seeing in a modern CPU like the x86 or PowerPC. The evaluation of all expressions ((1 + 1) / 2) is … Read more