// push constant 0
@0
D = A
@SP
A = M
M = D
@SP
M = M + 1

// pop local 0
@0
D = A
@LCL
A = M
D = D + A
@R13
M = D
// ^ R13 = local + index
@SP
A = M
A = A - 1
D = M
@SP
M = M - 1
// ^ pop into D
@R13
A = M
M = D
// ^ *R13 = D

// label LOOP_START
(LOOP_START)

// push argument 0
@0
D = A
@ARG
A = M
A = D + A
D = M
// ^ D = *(LCL + index)
@SP
A = M
M = D
@SP
M = M + 1
// ^ push D

// push local 0
@0
D = A
@LCL
A = M
A = D + A
D = M
// ^ D = *(LCL + index)
@SP
A = M
M = D
@SP
M = M + 1
// ^ push D

// add
@SP
A = M
A = A - 1
A = A - 1
D = M
A = A + 1
D = D + M
A = A - 1
M = D
@SP
M = M - 1

// pop local 0
@0
D = A
@LCL
A = M
D = D + A
@R13
M = D
// ^ R13 = local + index
@SP
A = M
A = A - 1
D = M
@SP
M = M - 1
// ^ pop into D
@R13
A = M
M = D
// ^ *R13 = D

// push argument 0
@0
D = A
@ARG
A = M
A = D + A
D = M
// ^ D = *(LCL + index)
@SP
A = M
M = D
@SP
M = M + 1
// ^ push D

// push constant 1
@1
D = A
@SP
A = M
M = D
@SP
M = M + 1

// sub
@SP
A = M
A = A - 1
A = A - 1
D = M
A = A + 1
D = D - M
A = A - 1
M = D
@SP
M = M - 1

// pop argument 0
@0
D = A
@ARG
A = M
D = D + A
@R13
M = D
// ^ R13 = argument + index
@SP
A = M
A = A - 1
D = M
@SP
M = M - 1
// ^ pop into D
@R13
A = M
M = D
// ^ *R13 = D

// push argument 0
@0
D = A
@ARG
A = M
A = D + A
D = M
// ^ D = *(LCL + index)
@SP
A = M
M = D
@SP
M = M + 1
// ^ push D

// if-goto LOOP_START
@SP
A = M
A = A - 1
D = M
@SP
M = M - 1
@LOOP_START
D;JNE
// push local 0
@0
D = A
@LCL
A = M
A = D + A
D = M
// ^ D = *(LCL + index)
@SP
A = M
M = D
@SP
M = M + 1
// ^ push D