My submission for http://redd.it/1kqxz9:
Tiny, a very simple fictional computer architecture, is programmed by an assembly language that has 16 mnemonics, with 37 unique op-codes. The system is based on Harvard architecture, and is very straight-forward: program memory is different from working memory, the machine only executes one instruction at a time, memory is an array of bytes from index 0 to index 255 (inclusive), and doesn't have any relative addressing modes.
Your goal will be to write an assembler for Tiny: though you don't need to simulate the code or machine components, you must take given assembly-language source code and produce a list of hex op-codes. You are essentially writing code that converts the lowest human-readable language to machine-readable language!
- Convert an .asm file to the official syntax (see here):
python assembler.py --pp-only <filename> - Parse an .asm file to hex code:
python assembler.py <filename> - Run an .asm file in the virtual machine:
python virtualmachine.py <filename>
pi.asm computes the value of π using a stochastic algorithm:
Another Monte Carlo method for computing π is to draw a circle inscribed in a square, and randomly place dots in the square. The ratio of dots inside the circle to the total number of dots will approximately equal π/4. From Wikipedia
Because of the random values and the word size of 8 bit, the result will have a very low precision and vary between runs. In addition, due to the lack of float point arithmetics, pi.asm will only output the equation to get π (e.g. 78/100*4). I'm still working on implementing 16bit float point arithmetics for Tiny, so I wanted to implement 16bit float point arithmetics for Tiny, but the 8 bit word size limits me in the programm size as the return address would start overflowing.pi.asm might output the actual result.
Comments
; This is a comment
Labels
label:
JMP :label
Constants
$mem_addr = [0]
$some_const = 5
MOV $mem_addr $some_const
Imports
#import file_name.asm
Char Constants
APRINT '!' ; Prints: !
APRINT '\n' ; Prints a newline
The MIT License (MIT)
Copyright (c) 2013 Markus Siemens
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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