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《黑客的快乐》第二版深入探讨计算机编程中的位操作技巧和算法优化，包括基本逻辑运算、绝对值函数等实用内容，适合程序员和技术爱好者。

• 文件名称：Hacker's Delight 2nd Edition.pdf

• 文件类型：PDF文档

• 文件标签：Computer Programming、Bit Manipulation、Algorithms

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Hacker’s Delight
Second Edition
Henry S. Warren, Jr.
Upper Saddle River, NJ • Boston • Indianapolis • San Francisco
New York • Toronto • Montreal • London • Munich • Paris • Madrid
CapeTown • Sydney • Tokyo • Singapore • Mexico City

To Joseph W. Gauld, my high school algebra teacher, for sparking in me a delight in the
simple things in mathematics

Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the publisher was aware of a trademark claim, the designations have been printed with initial capital letters or in all capitals. The author and publisher have taken care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained herein. The publisher offers excellent discounts on this book when ordered in quantity for bulk purchases or special sales, which may include electronic versions and/or custom covers and content particular to your business, training goals, marketing focus, and branding interests. For more information, please contact: U.S. Corporate and Government Sales (800) 382-3419 corpsales@pearsontechgroup.com For sales outside the United States, please contact: International Sales international@pearsoned.com Visit us on the Web: informit.com/aw Library of Congress Cataloging-in-Publication Data Warren, Henry S. Hacker’s delight / Henry S. Warren, Jr. -- 2nd ed. p. cm. Includes bibliographical references and index. ISBN 0-321-84268-5 (hardcover : alk. paper) 1. Computer programming. I. Title. QA76.6.W375 2013 005.1—dc23 2012026011 Copyright © 2013 Pearson Education, Inc. All rights reserved. Printed in the United States of America. This publication is protected by copyright, and permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. To obtain permission to use material from this work, please submit a written request to Pearson Education, Inc., Permissions Department, One Lake Street, Upper Saddle River, New Jersey 07458, or you may fax your request to (201) 236-3290. ISBN-13: 978-0-321-84268-8 ISBN-10: 0-321-84268-5 Text printed in the United States on recycled paper at Courier in Westford, Massachusetts. First printing, September 2012

Contents
Foreword
Preface
CHAPTER 1. INTRODUCTION
1–1 Notation
1–2 Instruction Set and Execution Time Model
CHAPTER 2. BASICS
2–1 Manipulating Rightmost Bits
2–2 Addition Combined with Logical Operations
2–3 Inequalities among Logical and Arithmetic Expressions
2–4 Absolute Value Function
2–5 Average of Two Integers
2–6 Sign Extension
2–7 Shift Right Signed from Unsigned
2–8 Sign Function
2–9 Three-Valued Compare Function
2–10 Transfer of Sign Function
2–11 Decoding a “Zero Means 2**n” Field
2–12 Comparison Predicates
2–13 Overflow Detection
2–14 Condition Code Result of Add, Subtract, ...