Which of the following instructions load five words from the stack into register

Question

Which of the following instructions load five words from the stack into registers r1-r5? What are the values of the registers r1-r5? (Assuming SP = 0x20008000, and these instriuctions are executed separately)

f the following instructions load five words from the st r5? What are the value of registers ri-r5? (Assumin ords from the stack into registers r1 e instructions are executed separately.) thes (1) LDMDA sp, fr1-r5) (2) LDMDB sp, fr1-r5h (3) LDMIA sp, fr1-r5h (4) LDMIB sp, fr1-r5) (5) LDMDA spl, fr1-r5h (6) LDMDB sp!, fr1-r5) (7) LDMIA sp!, fr1-r5) (8) LDMIB sp!, fr1-r5) Value 0x00000006 0x00000005 0x00000004 0x00000003 0x00000002 0x00000001 0x00000000 0xFFFFFFFF 0xFFFFFFFE OxFFFFFFFD 0xFFFFFFFC 0xFFFFFFFB 0xFFFFFFFA Memory Address| 0x20008008 0x20008004 0x20008000 0x2000800C 0x20008008 0x20008004 0x20008000 0x20007FFC 0x20007FF8 0x20007FF4 0x20007FF0 0x20007FE8 0x20007FE4

Explanation / Answer

ANS. 5

As shown in the given table, stack starts from a higher value of address and progresses to lower values further, therefore it's a decreasing stack.

The first value is stored in SP = 0x20008000 itself so DA(Decrement After) suffix will be used as we need the first value of SP also. The correct syntax is when '!' is added.

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