https://github.com/hopson97/hop-virtual-machine
A simple virtual machine/ interpretted langauge/ assembler
https://github.com/hopson97/hop-virtual-machine
Last synced: 11 months ago
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A simple virtual machine/ interpretted langauge/ assembler
- Host: GitHub
- URL: https://github.com/hopson97/hop-virtual-machine
- Owner: Hopson97
- Created: 2016-06-17T21:39:19.000Z (almost 10 years ago)
- Default Branch: master
- Last Pushed: 2016-09-02T22:15:52.000Z (almost 10 years ago)
- Last Synced: 2025-01-17T13:48:30.103Z (over 1 year ago)
- Language: C++
- Homepage:
- Size: 10.7 KB
- Stars: 3
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# HOP-Virtual-Machine
This is a 2 part program, a "assembler" and "virtual CPU" to interpret the assembled instructions.
So far the instructions for it :
| Value | Instruction | Notes | DOES |
|-------|-------------|-----------------------------------|------------------------------------------------------------------|
| 0 | PUSH X | Replace "X" with an integer value | Pushes "X" onto the top of the stack |
| 1 | POP | | Removes the value from the top of the stack |
| 2 | ADD | | Adds top two values of the stack together, adds new value on top |
| 3 | SUB | | Adds top two values of the stack together, |
| 4 | PRINT | | Adds new value on top |
| 5 | JUMP | Requires a label to jump to | Jumps to a "label" in the program |
| 6 | JIE | Requires a label to jump to | Jumps to a "label" in the program, if the top of stack is equal to next num |
| 7 | JIN | Requires a label to jump to | Jumps to a "label" in the program , if the top of stack is not equal to next num |
| 8 | JIL | Requires a label to jump to | Jumps to a "label" in the program, if the top of stack is less than next num |
| 9 | JIG | Requires a label to jump to | Jumps to a "label" in the program, if the top of stack is greater than next num |
| 10 | EXIT | | Exits the program |
As seen in the instruction list, you can also add labels. Every .hop needs a "main:" label as this marks the entry point of the program.
You can add labels wherever. However, you can only "JUMP" to the ones defined earlier in the program so far.
eg:
_____________
```
SomeSection:
PUSH 8
PRINT
EXIT
SomeLabel:
PUSH 7
PUSH 3
ADD
PRINT
JIE 10 someSection
main:
PUSH 5
PUSH 3
SUB
JIL 3 SomeLabel
PRINT
JUMP SomeLabel
```
_________________
Prints out:
2