Andre Tampubolon anta40

Foreward

This document was originally written several years ago. At the time I was working as an execution core verification engineer at Arm. The following points are coloured heavily by working in and around the execution cores of various processors. Apply a pinch of salt; points contain varying degrees of opinion.

It is still my opinion that RISC-V could be much better designed; though I will also say that if I was building a 32 or 64-bit CPU today I'd likely implement the architecture to benefit from the existing tooling.

Mostly based upon the RISC-V ISA spec v2.0. Some updates have been made for v2.2

Original Foreword: Some Opinion

The RISC-V ISA has pursued minimalism to a fault. There is a large emphasis on minimizing instruction count, normalizing encoding, etc. This pursuit of minimalism has resulted in false orthogonalities (such as reusing the same instruction for branches, calls and returns) and a requirement for superfluous instructions which impacts code density both in terms of size and

	/**
	* Copyright (c) E.Y. Baskoro, Research In Motion Limited.
	*
	* 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

	public static void deleteFile(String path) {
	if (path.startsWith("file://")) {
	// do nothing
	} else if (!path.startsWith("/"))
	path = "file:///" + path;
	else if (path.startsWith("//"))
	path = "file:/" + path;
	else
	path = "file://" + path;

	/**
	* This is how to use ScreenSplash.java
	*/
	package com.durianapp.brandapp;

	import com.durianapp.brandapp.ui.ScreenSplash;

	public class BrandApp extends UiApplication {
	public BrandApp() {

	package com.durianapp.kertasdanlakban;
	import net.rim.device.api.ui.UiApplication;


	public class Lakban extends UiApplication {
	public Lakban() {
	pushScreen(new LakbanScreen());
	}

	public static void main(String[] args) {

	/**
	* Method to get all bytes from a file.
	*
	* @param path
	* @return
	* @throws IOException
	*/
	public static byte[] getFileContent(String path) throws IOException {
	FileConnection file = null;

	/**
	* I use this method to get contents of JSON formatted file that I put into res
	* directory to deliver default data for my application.
	* Visit my blog at http://web.durianapp.com
	*/

	public static String getResFileContent(String filename) {
	InputStream is = null;

	try {

	/**
	* To use this example, you need to grap my repository on
	* https://github.com/amrishodiq/Blackberry-Development-Tutorial/tree/master/TakingPicture/src/com/durianberry/takingpicture
	*/
	public final class TakingPictureScreen extends MainScreen implements
	PictureTakerListener, FieldChangeListener {
	private ButtonField button;
	private BitmapField photoField;

	public TakingPictureScreen() {

	public static synchronized String saveToFile(String basePath, byte[] data)
	throws IOException {
	try {
	if (basePath.startsWith("file://")) {
	// do nothing
	} else if (!basePath.startsWith("/"))
	basePath = "file:///" + basePath;
	else if (basePath.startsWith("//"))
	basePath = "file:/" + basePath;
	else