explain the lines of code: fast pl * bitCount returns count of number of 1's in word2, bitCount (7) = 3Legal ops: ! ~ & ^ | + << >>Max ops: 40* Examples: bitCount (5)*** Rating: 4*/int bitCount(int x) {}=int mask1=0x11 | (0x11<<8);int mask = mask1 | (mask1<<16);//returns the value of the words back as they should beint a=x&mask;a + x>>1&mask;a+=x>>2&mask;a+=x>>3&mask;a=a+(a>>16);mask=0xF | (0xF<<8);a= (a&mask)+((a>>4) &mask);return(a+(a>>8)) & 0x3F; * reverseBytes reverse the bytes of x*Example: reverseBytes (0x01020304) = 0x04030201Legal ops: ! ~ & ^ | + << >>**Max ops: 25*Rating: 3*/int reverseBytes (int x) {}int m=0xFF;int byte1=x&m; //shift to the right by the bytesint byte2=(x>>8) &m;|int byte3=(x>>16) &m;int byte4=(x>>24) &m;//return the reverse of each bytereturn (byte1<<24)| (byte2<<16) | (byte3<<8) | byte4;

Answered: explain the lines of code

Engineering

Computer Science

explain the lines of code

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

explain the lines of code:

fast pl

* bitCount returns count of number of 1's in word
2, bitCount (7) = 3
Legal ops: ! ~ & ^ | + << >>
Max ops: 40
* Examples: bitCount (5)
*
*
* Rating: 4
*/
int bitCount(int x) {
}
=
int mask1=0x11 | (0x11<<8);
int mask = mask1 | (mask1<<16);
//returns the value of the words back as they should be
int a=x&mask;
a + x>>1&mask;
a+=x>>2&mask;
a+=x>>3&mask;
a=a+(a>>16);
mask=0xF | (0xF<<8);
a= (a&mask)+((a>>4) &mask);
return(a+(a>>8)) & 0x3F;

* reverseBytes reverse the bytes of x
*
Example: reverseBytes (0x01020304) = 0x04030201
Legal ops: ! ~ & ^ | + << >>
*
*
Max ops: 25
*
Rating: 3
*/
int reverseBytes (int x) {
}
int m=0xFF;
int byte1=x&m; //shift to the right by the bytes
int byte2=(x>>8) &m;|
int byte3=(x>>16) &m;
int byte4=(x>>24) &m;
//return the reverse of each byte
return (byte1<<24)| (byte2<<16) | (byte3<<8) | byte4;

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