Given C Code: void* basic_memset(void s, int c, size_t n) { size_t cnt = 0; unsigned char schar = s; while (cnt < n) { *schar++ = (unsigned char) c; cnt++; } return s; } Cycles per element (CPE): The CPE denotes performance of program that helps in improving code. It helps to understand detailed level loop performance for an iterative program. It is appropriate for programs that use a repetitive computation. The processor’s activity sequencing is controlled by a clock that provides regular signal of some frequency. Loop unrolling: It denotes a program transformation that would reduce count of iterations for a loop. It increases count of elements computed in each iteration. It reduces number of operations that is not dependent to program directly. It reduces count of operations in critical paths of overall computations.

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Answer 1

Question

Chapter 5, Problem 5.17HW

Program Plan Intro

Given C Code:

void* basic_memset(void s, int c, size_t n)

{

size_t cnt = 0;

unsigned char schar = s;

while (cnt < n)

{

*schar++ = (unsigned char) c;

cnt++;

}

return s;

}

Cycles per element (CPE):

The CPE denotes performance of program that helps in improving code.

It helps to understand detailed level loop performance for an iterative program.

It is appropriate for programs that use a repetitive computation.

The processor’s activity sequencing is controlled by a clock that provides regular signal of some frequency.

Loop unrolling:

It denotes a program transformation that would reduce count of iterations for a loop.

It increases count of elements computed in each iteration.

It reduces number of operations that is not dependent to program directly.

It reduces count of operations in critical paths of overall computations.

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Answer 2

Question

Chapter 5, Problem 5.17HW

Program Plan Intro

Given C Code:

void* basic_memset(void s, int c, size_t n)

{

size_t cnt = 0;

unsigned char schar = s;

while (cnt < n)

{

*schar++ = (unsigned char) c;

cnt++;

}

return s;

}

Cycles per element (CPE):

The CPE denotes performance of program that helps in improving code.

It helps to understand detailed level loop performance for an iterative program.

It is appropriate for programs that use a repetitive computation.

The processor’s activity sequencing is controlled by a clock that provides regular signal of some frequency.

Loop unrolling:

It denotes a program transformation that would reduce count of iterations for a loop.

It increases count of elements computed in each iteration.

It reduces number of operations that is not dependent to program directly.

It reduces count of operations in critical paths of overall computations.

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Answer 3

Question

Chapter 5, Problem 5.17HW

Program Plan Intro

Given C Code:

void* basic_memset(void s, int c, size_t n)

{

size_t cnt = 0;

unsigned char schar = s;

while (cnt < n)

{

*schar++ = (unsigned char) c;

cnt++;

}

return s;

}

Cycles per element (CPE):

The CPE denotes performance of program that helps in improving code.

It helps to understand detailed level loop performance for an iterative program.

It is appropriate for programs that use a repetitive computation.

The processor’s activity sequencing is controlled by a clock that provides regular signal of some frequency.

Loop unrolling:

It denotes a program transformation that would reduce count of iterations for a loop.

It increases count of elements computed in each iteration.

It reduces number of operations that is not dependent to program directly.

It reduces count of operations in critical paths of overall computations.

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Answer 4

Question

Chapter 5, Problem 5.17HW

Program Plan Intro

Given C Code:

void* basic_memset(void s, int c, size_t n)

{

size_t cnt = 0;

unsigned char schar = s;

while (cnt < n)

{

*schar++ = (unsigned char) c;

cnt++;

}

return s;

}

Cycles per element (CPE):

The CPE denotes performance of program that helps in improving code.

It helps to understand detailed level loop performance for an iterative program.

It is appropriate for programs that use a repetitive computation.

The processor’s activity sequencing is controlled by a clock that provides regular signal of some frequency.

Loop unrolling:

It denotes a program transformation that would reduce count of iterations for a loop.

It increases count of elements computed in each iteration.

It reduces number of operations that is not dependent to program directly.

It reduces count of operations in critical paths of overall computations.

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Answer 5

Chapter 5, Problem 5.17HW

Program Plan Intro

Given C Code:

void* basic_memset(void s, int c, size_t n)

{

size_t cnt = 0;

unsigned char schar = s;

while (cnt < n)

{

*schar++ = (unsigned char) c;

cnt++;

}

return s;

}

Cycles per element (CPE):

The CPE denotes performance of program that helps in improving code.

It helps to understand detailed level loop performance for an iterative program.

It is appropriate for programs that use a repetitive computation.

The processor’s activity sequencing is controlled by a clock that provides regular signal of some frequency.

Loop unrolling:

It denotes a program transformation that would reduce count of iterations for a loop.

It increases count of elements computed in each iteration.

It reduces number of operations that is not dependent to program directly.

It reduces count of operations in critical paths of overall computations.

Answer 6

Chapter 5, Problem 5.17HW

Program Plan Intro

Given C Code:

void* basic_memset(void s, int c, size_t n)

{

size_t cnt = 0;

unsigned char schar = s;

while (cnt < n)

{

*schar++ = (unsigned char) c;

cnt++;

}

return s;

}

Cycles per element (CPE):

The CPE denotes performance of program that helps in improving code.

It helps to understand detailed level loop performance for an iterative program.

It is appropriate for programs that use a repetitive computation.

The processor’s activity sequencing is controlled by a clock that provides regular signal of some frequency.

Loop unrolling:

It denotes a program transformation that would reduce count of iterations for a loop.

It increases count of elements computed in each iteration.

It reduces number of operations that is not dependent to program directly.

It reduces count of operations in critical paths of overall computations.

Answer 7

Chapter 5, Problem 5.17HW

Program Plan Intro

Given C Code:

void* basic_memset(void s, int c, size_t n)

{

size_t cnt = 0;

unsigned char schar = s;

while (cnt < n)

{

*schar++ = (unsigned char) c;

cnt++;

}

return s;

}

Cycles per element (CPE):

The CPE denotes performance of program that helps in improving code.

It helps to understand detailed level loop performance for an iterative program.

It is appropriate for programs that use a repetitive computation.

The processor’s activity sequencing is controlled by a clock that provides regular signal of some frequency.

Loop unrolling:

It denotes a program transformation that would reduce count of iterations for a loop.

It increases count of elements computed in each iteration.

It reduces number of operations that is not dependent to program directly.

It reduces count of operations in critical paths of overall computations.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 5.1 - Prob. 5.1PP Ch. 5.2 - Prob. 5.2PP Ch. 5.4 - Prob. 5.3PP Ch. 5.6 - Prob. 5.4PP Ch. 5.7 - Practice Problem 5.5 (solution page 575) Suppose...Ch. 5.7 - Practice Problem 5.6 (solution page 575) Let us...Ch. 5.8 - Prob. 5.7PP Ch. 5.9 - Prob. 5.8PP Ch. 5.11 - Prob. 5.9PP Ch. 5.12 - Prob. 5.10PP

Solution Summary: The author explains how cycles per element (CPE) denotes performance of program that helps in improving code. Loop unrolling reduces number of iterations for a loop.

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