4) Human Assembler: Hand assemble (encode) the following machine code instructio

Question

4) Human Assembler:  Hand assemble (encode) the following machine code instructions.  Write all instruction codes in hex! (2 points each)

For a-d write answer in 32-bit instruction code:

a) MOV    R0, #0x12

32-bit IC: ________________

b) ADD    R5, R6, R7

32-bit IC: ________________

c) LDR    R4, [R5, #4]!

32-bit IC: ________________

d)    STR    R4,[R5], #4

32-bit IC:  ________________

For e-g write answer in 16-bit instruction code:

e) LDRH    R0, [R1]

16-bit IC: ________________

f) STRB    R2, [R3]

16-bit IC: ________________

g) LDR     R4, [R5, #4]

16-bit IC: ________________

Explanation / Answer

a) MOV    R0, #0x12

32-bit IC: 0x1200A0E3

b) ADD    R5, R6, R7

32-bit IC:  0x075086E0

c) LDR    R4, [R5, #4]!

32-bit IC: 0x0440B5E5

d)    STR    R4,[R5], #4

32-bit IC: 0x044085E4

For e-g write answer in 16-bit instruction code:

e) LDRH    R0, [R1]

16-bit IC: 0x0888

f) STRB    R2, [R3]

16-bit IC: 0x1A70

g) LDR     R4, [R5, #4]

16-bit IC: 0x6C68

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