Please help. Deduct as much as question you want.

Question 1

1. Execute the given sequence of assembly instructions. List the final value of the four condition codes after the sequence is completed. Using 0 to indicate the flag is cleared and 1 to indicate the flag is set. Keep in mind that the operations are working with 1 byte values. (b suffix).

   Assembly sequence:

   movb $0xFF, %al

   movb $0x81, %bl

   addb %bl, %al

   Condition code final value:

   CF = Blank 1

   OF = Blank 2

   SF = Blank 3

   ZF = Blank 4

20 points

Question 2

1. Execute the given sequence of assembly instructions. List the final value of the four condition codes after the sequence is completed. Using 0 to indicate the flag is cleared and 1 to indicate the flag is set. Keep in mind that the operations are working with 1 byte values. (b suffix).

   Assembly sequence:

   movb $0xF0, %al

   testb %al, %al

   Condition code final values:

   CF = Blank 1

   OF = Blank 2

   SF = Blank 3

   ZF = Blank 4

20 points

Question 3

1. Which C function matches the given assembly code? Assume that x is in %rdi, y is in %rsi, and return value is in %rax.

   Assembly code:

   cmpq %rsi, %rdi

   jl L1

   leaq 1(%rdi), %rax

   ret

   L1:

   leaq -1(%rsi), %rax

   ret

   Choices below:

   		/*============================*/ long foo(long x, long y){ if (x<=y) return x+1; else return y-1; }
   		/*============================*/ long foo(long x, long y){ if (x return x+1; else return y-1; }
   		/*============================*/ long foo(long x, long y){ if (x>=y) return x+1; else return y-1; }
   		/*============================*/ long foo(long x, long y){ if (x>y) return x+1; else return y-1; }

20 points

Question 4

1. What is the final value of %rax after the given sequence of assembly code is executed? Assume that at the start of the sequence, %rdi = 30, %rsi = 20.

   Assembly code:

   movq $1, %rax

   cmpq %rsi, %rdi

   cmovge $0, %rax

   		30
   		20
   		1
   		0

20 points

Question 5

1. Given the sequence of assembly code, what would be the final value of %rsi and %rdx after the sequence is executed? Assume that at the start of the execution, %rdi = 9.

   Assembly code:

   movq $0, %rsi

   movq $0, %rdx

   jmp L2

   L1: incq %rdx

   addq $2, %rsi

   L2: cmpq %rsi, %rdi

   jg L1

   L3:

   decq %rdi

   Final values:

   %rsi = Blank 1

   %rdx = Blank 2