(8 points) The following sequence of code separates a two-digit BCD number in R7, then stores...

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(8 points) The following sequence of code separates a two-digit BCD number in R7, then stores them in variables Xten and Xunit, respectively. Convert the code into a subroutine named as BCD_Separation. In the beginning of the subroutine, make sure you PUSH all relevant registers to protect their values in the parent program, then POP them before you return. MOV R1, R7 MOV R2, R1 AND R1, # 0x0F LDR RO, Xunit STRB R1, [RO] LSR R2, #4 LDR RO, Xten STRB R2, [RO] ; R1 gets a copy of BCD number ; R2 gets a copy of BCD number ; R1 has the units digit ; ROaddress of Xunit ; stores R1 in Xunit ; R2 has the tens digit ; ROaddress of Xten ; stores R2 in Xten (8 points) The following sequence of code separates a two-digit BCD number in R7, then stores them in variables Xten and Xunit, respectively. Convert the code into a subroutine named as BCD_Separation. In the beginning of the subroutine, make sure you PUSH all relevant registers to protect their values in the parent program, then POP them before you return. MOV R1, R7 MOV R2, R1 AND R1, # 0x0F LDR RO, Xunit STRB R1, [RO] LSR R2, #4 LDR RO, Xten STRB R2, [RO] ; R1 gets a copy of BCD number ; R2 gets a copy of BCD number ; R1 has the units digit ; ROaddress of Xunit ; stores R1 in Xunit ; R2 has the tens digit ; ROaddress of Xten ; stores R2 in Xten

Answer rating: 100% (QA)

The subroutine BCDSeparation correctly separates a ... View the full answer