Computer Systems: A Programmer's Perspective (3rd Edition)

3rd Edition

ISBN: 9780134092669

Author: Bryant, Randal E. Bryant, David R. O'Hallaron, David R., Randal E.; O'Hallaron, Bryant/O'hallaron

Publisher: PEARSON

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Textbook Question

Chapter 2, Problem 2.66HW

Write code to implement the following function:

* Generate mask indicating leftmost 1 in x. Assume w=32.

* For example, 0xFF00 -> 0x8000, and 0x6600 — > 0x4000.

* If x = 0, then return 0.

int leftmost_one(unsigned x);

Your function should follow the bit-level integer coding rules (page 128), except that you may assume that data type int has w = 32 bits.

Your code should contain a total of at most 15 arithmetic, bitwise, and logical operations.

Hint: First transform x into a bit vector of the form [0…011…1].

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Chapter 2, Problem 2.65HW

Chapter 2, Problem 2.67HW

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Chapter 2 Solutions

Computer Systems: A Programmer's Perspective (3rd Edition)

Ch. 2.1 - Practice Problem 2.1 (solution page 143) Perform...Ch. 2.1 - Prob. 2.2PP Ch. 2.1 - Prob. 2.3PP Ch. 2.1 - Practice Problem 2.4 (solution page 144) Without...Ch. 2.1 - Prob. 2.5PP Ch. 2.1 - Prob. 2.6PP Ch. 2.1 - Prob. 2.7PP Ch. 2.1 - Prob. 2.8PP Ch. 2.1 - Practice Problem 2.9 solution page 146 Computers...Ch. 2.1 - Prob. 2.10PP

Ch. 2.1 - Prob. 2.11PP Ch. 2.1 - Prob. 2.12PP Ch. 2.1 - Prob. 2.13PP Ch. 2.1 - Prob. 2.14PP Ch. 2.1 - Prob. 2.15PP Ch. 2.1 - Prob. 2.16PP Ch. 2.2 - Prob. 2.17PP Ch. 2.2 - Practice Problem 2.18 (solution page 149) In...Ch. 2.2 - Prob. 2.19PP Ch. 2.2 - Prob. 2.20PP Ch. 2.2 - Prob. 2.21PP Ch. 2.2 - Prob. 2.22PP Ch. 2.2 - Prob. 2.23PP Ch. 2.2 - Prob. 2.24PP Ch. 2.2 - Prob. 2.25PP Ch. 2.2 - Practice Problem 2.26 (solution page 151) You are...Ch. 2.3 - Prob. 2.27PP Ch. 2.3 - Prob. 2.28PP Ch. 2.3 - Prob. 2.29PP Ch. 2.3 - Practice Problem 2.30 (solution page 153) Write a...Ch. 2.3 - Prob. 2.31PP Ch. 2.3 - Practice Problem 2.32 (solution page 153) You are...Ch. 2.3 - Prob. 2.33PP Ch. 2.3 - Prob. 2.34PP Ch. 2.3 - Practice Problem 2.35 (solution page 154) You are...Ch. 2.3 - Prob. 2.36PP Ch. 2.3 - Practice Problem 2.37 solution page 155 You are...Ch. 2.3 - Prob. 2.38PP Ch. 2.3 - Prob. 2.39PP Ch. 2.3 - Practice Problem 2.40 (solution page 156) For each...Ch. 2.3 - Prob. 2.41PP Ch. 2.3 - Practice Problem 2.42 (solution page 156) Write a...Ch. 2.3 - Practice Problem 2.43 (solution page 157) In the...Ch. 2.3 - Prob. 2.44PP Ch. 2.4 - Prob. 2.45PP Ch. 2.4 - Prob. 2.46PP Ch. 2.4 - Prob. 2.47PP Ch. 2.4 - Prob. 2.48PP Ch. 2.4 - Prob. 2.49PP Ch. 2.4 - Prob. 2.50PP Ch. 2.4 - Prob. 2.51PP Ch. 2.4 - Prob. 2.52PP Ch. 2.4 - Practice Problem 2.53 (solution page 160) Fill in...Ch. 2.4 - Practice Problem 2.54 (solution page 160) Assume...Ch. 2 - Compile and run the sample code that uses...Ch. 2 - Try running the code for show_bytes for different...Ch. 2 - Prob. 2.57HW Ch. 2 - Write a procedure is_little_endian that will...Ch. 2 - Prob. 2.59HW Ch. 2 - Prob. 2.60HW Ch. 2 - Prob. 2.61HW Ch. 2 - Write a function int_shifts_are_arithmetic() that...Ch. 2 - Fill in code for the following C functions....Ch. 2 - Write code to implement the following function: /...Ch. 2 - Write code to implement the following function: /...Ch. 2 - Write code to implement the following function: / ...Ch. 2 - You are given the task of writing a procedure...Ch. 2 - Prob. 2.68HW Ch. 2 - Write code for a function with the following...Ch. 2 - Write code for the function with the following...Ch. 2 - You just started working for a company that is...Ch. 2 - You are given the task of writing a function that...Ch. 2 - Write code for a function with the following...Ch. 2 - Write a function with the following prototype: /...Ch. 2 - Prob. 2.75HW Ch. 2 - The library function calloc has the following...Ch. 2 - Prob. 2.77HW Ch. 2 - Write code for a function with the following...Ch. 2 - Prob. 2.79HW Ch. 2 - Write code for a function threefourths that, for...Ch. 2 - Prob. 2.81HW Ch. 2 - Prob. 2.82HW Ch. 2 - Prob. 2.83HW Ch. 2 - Prob. 2.84HW Ch. 2 - Prob. 2.85HW Ch. 2 - Intel-compatible processors also support an...Ch. 2 - Prob. 2.87HW Ch. 2 - Prob. 2.88HW Ch. 2 - We are running programs on a machine where values...Ch. 2 - You have been assigned the task of writing a C...Ch. 2 - Prob. 2.91HW Ch. 2 - Prob. 2.92HW Ch. 2 - following the bit-level floating-point coding...Ch. 2 - Following the bit-level floating-point coding...Ch. 2 - Following the bit-level floating-point coding...Ch. 2 - Following the bit-level floating-point coding...Ch. 2 - Prob. 2.97HW

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