In Hacker’s Delight, Henry Warren once again compiles an irresistible collection of programming hacks: timesaving techniques, algorithms, and tricks that help programmers build more elegant and efficient software, while also gaining deeper insights into their craft. Warren’s hacks are eminently practical, but they’re also intrinsically interesting, and sometimes unexpected, much like the solution to a great puzzle. They are, in a word, a delight to any programmer who is excited by the opportunity to improve.

Extensive additions in this edition include

A new chapter on cyclic redundancy checking (CRC), including routines for the commonly used CRC-32 code
A new chapter on error correcting codes (ECC), including routines for the Hamming code
More coverage of integer division by constants, including methods using only shifts and adds
Computing remainders without computing a quotient
More coverage of population count and counting leading zeros
Array population count
New algorithms for compress and expand
An LRU algorithm
Floating-point to/from integer conversions
Approximate floating-point reciprocal square root routine
A gallery of graphs of discrete functions
Now with exercises and answers

Author Biography

Henry S. Warren, Jr., has had a fifty-year career with IBM, spanning from the IBM 704 to the PowerPC and beyond. He has worked on various military command and control systems and on the SETL (SET Language) project under Jack Schwartz. Since 1973, Hank has been with IBM’s Research Division, focusing on compilers and computer architectures. He currently works on a supercomputer project aimed at an exaflop. Hank received his Ph.D. in computer science from the Courant Institute at New York University.

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