Computer Systems: A Programmer's Perspective Plus Mastering Engineering With Pearson Etext -- Access Card Package (3rd Edition)
Computer Systems: A Programmer's Perspective Plus Mastering Engineering With Pearson Etext -- Access Card Package (3rd Edition)
3rd Edition
ISBN: 9780134123837
Author: Randal E. Bryant, David R. O'Hallaron
Publisher: PEARSON
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Chapter 6, Problem 6.36HW

A)

Program Plan Intro

Given Information:

The given code is:

//variable declaration

//matrix

Int x[2][128];

int i;

//variable to store sum

Int sum=0;

//iterate through the matrix

for(i=0;i<128;i++)

{

//sum of matrix elements

sum+= x[0][i]*x[1][i];

}

Explanation:

  • The given array is x[2][128]. The cache is initially empty and it begins to store data from “0x0” addresses.
  • Here, size of (int) =4.
  • Only memory accesses entries of array “x”.
  • C arrays allocated in row-major order which means that each row is in their contiguous memory location.

B)

Program Plan Intro

Given Information:

The given code is:

//variable declaration

//matrix

int x[2][128];

int i;

//variable to store sum

int sum=0;

//iterate through the matrix

for(i=0;i<128;i++)

{

//sum of matrix elements

sum+= x[0][i]*x[1][i];

}

Explanation:

  • The given array is x[2][128]. The cache is initially empty and it begins to store data from “0x0” addresses.
  • Here, size of (int) =4.
  • Only memory accesses entries of array “x”.
  • C arrays allocated in row-major order which means that each row is in their contiguous memory location.

C)

Program Plan Intro

Given Information:

The given code is:

//variable declaration

//matrix

Int x[2][128];

int i;

//variable to store sum

Int sum=0;

//iterate through the matrix

for(i=0;i<128;i++)

{

//sum of matrix elements

sum+= x[0][i]*x[1][i];

}

Explanation:

  • The given array is x[2][128]. The cache is initially empty and it begins to store data from “0x0” addresses.
  • Here, size of (int) =4.
  • Only memory accesses entries of array “x”.
  • C arrays allocated in row-major order which means that each row is in their contiguous memory location.

D)

Program Plan Intro

Given Information:

The given code is:

//variable declaration

//matrix

int x[2][128];

int i;

//variable to store sum

int sum=0;

//iterate through the matrix

for(i=0;i<128;i++)

     {

//sum of matrix elements

              sum+= x[0][i]*x[1][i];

     }

  • The given array is x[2][128]. The cache is initially empty and it begins to store data from “0x0” addresses.
  • Here, size of (int) =4.
  • Only memory accesses entries of array “x”.
  • C arrays allocated in row-major order which means that each row is in their contiguous memory location.

E)

Program Plan Intro

Given Information:

The given code is:

The given code is:

//variable declaration

//matrix

Int x[2][128];

int i;

//variable to store sum

Int sum=0;

//iterate through the matrix

for(i=0;i<128;i++)

{

//sum of matrix elements

sum+= x[0][i]*x[1][i];

}

Explanation:

  • The given array is x[2][128]. The cache is initially empty and it begins to store data from “0x0” addresses.
  • Here, size of (int) =4.
  • Only memory accesses entries of array “x”.
  • C arrays allocated in row-major order which means that each row is in their contiguous memory location.

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