Chapter 3.6, Problem 3.26PP

a.

Explanation of Solution

Jump Instruction:

• The “jump” instruction causes execution to switch to an entirely new position in program.
• The “label” indicates jump destinations in assembly code.
• The “je” instruction denotes “jump if equal” or “jump if zero”.
  • The comparison operation is performed.
  • If result of comparison is either equal or zero, then jump operation takes place.
• The “ja” instruction denotes “jump if above”...

b.

Explanation of Solution

Corresponding C code:

// Define method fun_a

long fun_a(unsigned long x )

{

// Declare variable

long val = 0;

//Loop

while(x)

{

//Compute result

val ^= x;

//Right shift value

x>>=1;

}

//Return

return val & 0x1;

}

Explanation:

• The register “%rdi” has value for “x”.
• The details of assembly code is shown below:
  • The instruction “movl %0, %eax” sets variable “%eax” to zero.
  • The instruction “jmp .L5” jumps to label “...

c.

Explanation of Solution

Explanation:

• The code computes parity of argument “x”.
• If there are odd numbers of ones in x, it returns 1...