EXIT = 1
READ = 3
WRITE = 4
STDIN = 0
STDOUT = 1

.data
    newLine: .ascii "\n"
    star: .ascii "*"
    space: .ascii " "
    height: .long 0
    counter1: .long 0
    counter2: .long 1
.text
.global _start
_start:
    movl $READ, %eax
    movl $STDIN, %ebx
    movl $height, %ecx
    movl $1, %edx
    int $0x80

    movl height, %esi
    sub $48, %esi
    movl %esi, height
    movl %esi, counter1

main_loop:
    cmpl $0, counter1
    je printTrunk

    pushl counter1
    pushl $space
    decl counter1
    call print

    pushl counter2
    pushl $star
    add $2, counter2
    call print
    call printNewLine
    jmp main_loop

printTrunk:
    pushl height
    pushl $space
    call print
    pushl $1
    pushl $star
    call print
    call printNewLine

    movl $EXIT, %eax
    int $0x80

.type print, @function
print:
    movl 8(%esp), %esi

print_loop:
    cmpl $0, %esi
    je end_loop
    decl %esi
    movl $WRITE, %eax
    movl $STDOUT, %ebx
    movl 4(%esp), %ecx
    movl $1, %edx
    int $0x80
    jmp print_loop

end_loop:
    ret

.type printNewLine, @function
printNewLine:
    movl $WRITE, %eax
    movl $STDOUT, %ebx
    movl $newLine, %ecx
    movl $1, %edx
    int $0x80
    ret