/AbstractVM

Primary LanguageC++

AbstractVM 💻

A simple virtual machine that is able to interpret programs that are written in a simplified assembler language. To be precise, it consists in a stack machine that is able to calculate simple arithmetical expressions. These very arithmetical expressions are given to the machine in the form of simple assembler programs.

How to use

Compiling

Using Makefile : type command make

Usage

With file : ./abstractVM file.avm [ exemples of .avm can be found in /Exemples/ ]

Standar Input : ./abstractVM [ To end the program execution type ;; ]

Values Type

  • Int8

  • Int16

  • Int32

  • Float

  • Double

  • BigDecimal

Instructions

  • push v Stack the v value at the top. The v value will naturally take one of the following forms: int8(n), int16(n), int32(n), float(z), double(z) or bigdecimal(z). (For example : int16(n) - create an signed 16-bit integer with the value n)

  • pop Unstacks the value at the top of the stack.

  • clear Clears the stack. Rendering it empty.

  • dup Duplicates the value on the top of the stack, and stacks the copy of the value.

  • swap Reverses the order of (swaps) the top two values on the stack.

  • dump Display each value on the stack from the newest to the oldest, WITHOUT MODIFYING the stack.

  • assert v Verify that the value at the top of the stack is equal to the one passed as parameter in this instruction.

  • add Unstack the first two values in the stack, add them, and then stack the result.

  • sub Unstack the first two values in the stack, substract them, and then stack the result.

  • mul Unstack the first two values in the stack, multiply them, and then stack the result.

  • div Unstack the first two values in the stack, divide them, and then stack the result.

  • mod Unstack the first two values in the stack, calculate their modulo, and then stack the result.

  • load v Copy the value from the register v and stack it at the top.

  • store v Unstack the first value and store it to the register v.

  • print If the last value of the stack is an 8-bit integer, print the corresponding ASCII character.

  • exit Quit the program execution.