.section .data
.global ptrgrades
.global num
.global ptrfreq
.global freqs

.section .text
.global frequencies

    frequencies:

# prologue
pushl %ebp # save previous stack frame pointer
movl %esp, %ebp # the stack frame pointer for sum function

    movl ptrfreq, %eax
    movl ptrgrades, %edx
    movl $0, %ecx # 0 to 20 incrementador
    pushl %ebx
    movl $0, %ebx
    movl $0, %esi

    mainLoop:
    cmpl $20, %ecx
    je fim
    jmp innerLoop

        innerLoop:
        cmpl num, %ebx
        je prepareNextLoop
        cmpl %ecx, (%edx)
        je foundGrade
        incl %edx
        incl %ebx
        jmp innerLoop


            foundGrade:
            incl %esi
            incl %edx
            incl %ebx
            jmp innerLoop


            prepareNextLoop:
            movl %esi, (%eax)
            incl %eax
            incl %ecx
            jmp mainLoop


    fim:
    popl %ebx

# epilogue
movl %ebp, %esp # restore the previous stack pointer ("clear" the stack)
popl %ebp # restore the previous stack frame pointer

ret