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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*Code in Python A bit shift is a procedure whereby the bits in a bit string are moved to the left or to the right. For example, we can shift the bits in the string 1011 two places to the left to produce the string 1110. Note that the leftmost two bits are wrapped around to the right side of the string in this operation. Define two scripts, shiftLeft.py and shiftRight.py, that expect a bit string as an input. The script shiftLeft shifts the bits in its input one place to the left, wrapping the leftmost bit to the rightmost position. The script shiftRight performs the inverse operation. Each script prints the resulting string. An example of shiftLeft.py input and output is shown below: Enter a string of bits: Hello world! ello world!H An example of shiftRight.py input and output is shown below: Enter a string of bits: Hello world! !Hello world

Oppkls.

Solution Floating point representation: It is defined as the representation of floating numbers. It includes sign bit, exponent, and mantissa bits. Based on precision it has 2 types. 1. For IEEE 754 single-precision floating-point numbers, what is the exponent of a denormalized floating-point number in decimal? Solution: In IEEE 754 single-precision, exponent bits are 8. Therefore exponent = 2 ^(n-1) -1 = 2^(8-1) -1 = 127 OPTION D 2. For IEEE 754 single-precision floating-point numbers, how many bits for mantissa? Solution: In IEEE 754 single-precision, there are 23 bits for mantissa. sign = 1 bit exponent = 8 bits mantissa = 23 bits 3. For IEEE 754 single-precision floating-point numbers, which of the following is an example of NAN? Solution: In IEEE 754 single-precision, NAN is a special value where all exponents bits are 1's and the mantissa is non zero. a. 1 111 1 111 0000 0000 1101 0000 0000 0000 Exponent is not all 1's. Not a NAN b. 0 111 1 111 1000 0000…

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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