Question 1 In the ARM chip, register ________ is the stack pointer. Question 2 A

Question

Question 1

In the ARM chip, register ________ is the stack pointer.

Question 2

Assume that R7 contains the value 20 000 000 hexadecimal. Which instruction would you use to load the 32 bit word addressed by R7 into R1?

Question 3

If register R0 contains 0x0000FFF1, and register R4 contains 0x0000FFF1, and the following instruction sequence executes:

CMP R0, R4
BEQ valueFound

will the branch be taken, or will the code fall-through the branch to the next instruction?

Question 4

Assume that register R6 contains the number 1, and SUBS instruction in the following code fragment is about to execute:

loop
; body of the loop

SUBS R6, #1
BNE loop

will the body of the loop execute one more time.

Question 5;

Assume that R0 contains the hexadecimal value 2000000C. If you want to store the 32-bit value in R5 at the address 2000000C, which instruction would you use?

Question 6;

The branch instruction, BNE someLabel, loads the program counter with the address of someLabel if the zero flag is true (logic-level 1).

Question 7;

Which instruction would you use to load register R4 with 20000008 hexadecimal?

Explanation / Answer

Answer:-----

1. In the ARM chip, register ___R13_____ is the stack pointer.

2. LDR R1, [R7]

3.  take the branch

4.  No

5. STR R5, [R0]

6. True

7. LDR R4, =0x20000008

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