parameter_registers = ['rdi', 'rsi', 'rdx', 'rcx', 'r8', 'r9']
return_registers = ['rax', 'rdx']

syscall_registers = ['rdi', 'rsi', 'rdx', 'r10', 'r8', 'r9']
static_chain_pointer = 'r10'

fparameter_registers = ['xmm0', 'xmm1', 'xmm2', 'xmm3', 'xmm4', 'xmm5', 'xmm6', 'xmm7']
freturn_registers = ['xmm0', 'xmm1']

callee_must_clean = ['rbx', 'rsp', 'rbp', 'r12', 'r13', 'r14', 'r15']

code = []

code.append('format elf64 executable 3')
code.append('entry start')
code.append('print:')
code.append('mov [rsp - 8], rbx')
code.append('mov rax, [rsp + 8]')
code.append('mov rdi, 10')
code.append('xor rcx, rcx')
code.append('print_loop0:')
code.append('mov [int_buffer + rcx], 48')
code.append('inc rcx')
code.append('cmp rcx, 20')
code.append('jl print_loop0')
code.append('xor rbx, rbx')
code.append('xor rdx, rdx')
code.append('print_loop1:')
code.append('div rdi')
code.append('dec rcx')
code.append('inc rbx')
code.append('add [int_buffer + rcx], dl')
code.append('xor rdx, rdx')
code.append('cmp rax, 0')
code.append('jg print_loop1')
code.append('mov rax, 1')
code.append('mov rdi, 1')
code.append('lea rsi, [int_buffer + rcx]')
code.append('mov rdx, rbx')
code.append('syscall')
code.append('mov [int_buffer], 10')
code.append('mov rax, 1')
code.append('mov rdi, 1')
code.append('mov rsi, int_buffer')
code.append('mov rdx, 1')
code.append('syscall')
code.append('mov rbx, [rsp - 8]')
code.append('ret')

code.append('start:')
with open('input.stk', 'r') as f:
    text = f.read()
    words = text.replace('\n', ' ').strip().split(' ')
    for word in words:
        if word.isdecimal():
            code.append('push ' + word)
        elif word == '+':
            code.append('pop rax')
            code.append('pop rdi')
            code.append('add rax, rdi')
            code.append('push rax')
        elif word == '-':
            code.append('pop rax')
            code.append('pop rdi')
            code.append('sub rax, rdi')
            code.append('push rax')
        elif word == '*':
            code.append('pop rax')
            code.append('pop rdi')
            code.append('mul rdi')
            code.append('push rax')
        elif word == 'pop':
            code.append('pop rax')
        elif word == 'dup':
            code.append('pop rax')
            code.append('push rax')
            code.append('push rax')
        elif word == 'print':
            code.append('call print')
        else:
            print('Unknown word:', word)

code.append('mov rax, 60')
code.append('mov rdi, 0')
code.append('syscall')
code.append('segment writable')
code.append('int_buffer rb 20')

for line in code:
    print(line)