Select exactly 6 lines of Hack Assembly Language, in the order they must be executed, that will implement the Hack Virtual Machine command:pop argument 0
Question
Select exactly 6 lines of Hack Assembly Language
that will implement the Hack Virtual Machine command:
pop argument 0
// Your assembly code here
Solution
Sure, here are the 6 lines of Hack Assembly Language that implement the Hack Virtual Machine command: pop argument 0.
@ARG
D=M
@0
D=D+A
@R13
M=D
@SP
AM=M-1
D=M
@R13
A=M
M=D
Here's a step-by-step explanation:
@ARG
: This line loads the base address of the 'argument' segment into the A register.D=M
: This line stores the base address of the 'argument' segment into the D register.@0
: This line loads the constant 0 into the A register.D=D+A
: This line adds the base address of the 'argument' segment and 0, storing the result in the D register.@R13
: This line loads the address of the general purpose register R13 into the A register.M=D
: This line stores the address of the 'argument' segment's 0th element into R13.@SP
: This line loads the address of the stack pointer into the A register.AM=M-1
: This line decrements the stack pointer and stores the address of the new top of the stack in the A register.D=M
: This line stores the value at the top of the stack in the D register.@R13
: This line loads the address stored in R13 (the address of the 'argument' segment's 0th element) into the A register.M=D
: This line stores the value from the top of the stack into the 'argument' segment's 0th element.
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