// Test VM file for syntax highlighting
// This file demonstrates various VM language features

// Stack arithmetic operations
push constant 7
push constant 8
add
push constant 3
sub
neg

// Logical operations
push constant 1
push constant 0
eq
push constant 5
push constant 3
gt
push constant 2
push constant 2
lt

// Bitwise operations
push constant 15
push constant 3
and
push constant 12
push constant 5
or
not

// Memory access operations
push argument 0
push argument 1
add
pop local 0

push local 0
push constant 1
add
pop local 1

push static 0
push static 1
add
pop static 2

push this 0
push that 0
add
pop this 1

push pointer 0
push pointer 1
add
pop temp 0

push temp 0
push temp 1
add
pop temp 2

// Program flow commands
label LOOP_START
push local 0
push constant 0
eq
if-goto LOOP_END

push local 0
push constant 1
sub
pop local 0

goto LOOP_START

label LOOP_END

// Function declaration
function Math.multiply 2
    push constant 0
    pop local 0        // sum = 0
    push constant 0
    pop local 1        // i = 0

    label MULTIPLY_LOOP
    push local 1
    push argument 1
    eq
    if-goto MULTIPLY_END

    push local 0
    push argument 0
    add
    pop local 0

    push local 1
    push constant 1
    add
    pop local 1

    goto MULTIPLY_LOOP

    label MULTIPLY_END
    push local 0
    return

// Function call
push constant 5
push constant 3
call Math.multiply 2
pop temp 0

// Another function with local variables
function Fibonacci.compute 3
    push argument 0
    push constant 2
    lt
    if-goto FIBO_BASE_CASE

    push argument 0
    push constant 1
    sub
    call Fibonacci.compute 1
    pop local 0

    push argument 0
    push constant 2
    sub
    call Fibonacci.compute 1
    pop local 1

    push local 0
    push local 1
    add
    return

    label FIBO_BASE_CASE
    push argument 0
    return

// Main function
function Main.main 0
    push constant 10
    call Fibonacci.compute 1
    pop temp 0
    return

// Complex memory operations
push constant 8000
pop pointer 1       // that = 8000
push constant 0
pop that 0          // that[0] = 0
push constant 1
pop that 1          // that[1] = 1

push constant 16384
pop pointer 1       // that = screen base address
push constant -1
pop that 0          // blacken first word

// Array processing example
function Array.sum 3
    push constant 0
    pop local 0         // sum = 0
    push constant 0
    pop local 1         // i = 0

    label SUM_LOOP
    push local 1
    push argument 1     // array length
    eq
    if-goto SUM_END

    push argument 0     // array base
    push local 1        // index
    add
    pop pointer 1       // that = array[i] address
    push that 0         // array[i] value
    push local 0        // current sum
    add
    pop local 0         // sum += array[i]

    push local 1
    push constant 1
    add
    pop local 1         // i++

    goto SUM_LOOP

    label SUM_END
    push local 0        // return sum
    return