Understanding some assembly code? -

i need deciphering means, put comments of think i'm not entirely sure.

movl 12(%ebp), %eax  //variable (x) moves eax register addl $4, %eax        // add value 4 x movl (%eax), %eax    //eax = *x; movl %eax, (%esp)    //stack pointer = *x call strlen          //calls gets length of string  movl %eax, %edx      //copy *x edx register, name *y movl %edx, %eax      //copy *y eax sall $2, %eax        //shift *x left 2 (eax) addl %edx, %eax      //*x + *y = *x (x shifted 2, remember) movl %eax, (%esp)    // move new *x string onto stack pointer call malloc          // memory allocate string movl %eax, 28(%esp)  //move string onto new variable, lets z movl $.lc1, %edx     //move string in lc1 edx movl 12(%ebp), %eax  //repeat @ top addl $4, %eax movl (%eax), %eax movl 28(%esp), %ecx  // move z ecx register movl %ecx, 8(%esp)   // move z closer stack pointer movl %edx, 4(%esp)   // move y closest stack pointer movl %eax, (%esp)    // set stack pointer x. stack goes: x, y, z call __isoc99_sscanf //return number of input items matched cmpl $1, %eax        //if x == 1, je   .l20            //jump l20 movl $.lc2, (%esp)   //else, lc2 becomes stack pointer call puts            //calls procedure, lc2 movl $1, %eax        // makes x = 1 jmp  .l19            // jump end 

it's not quite correct. here's attempt:

movl    12(%ebp), %eax  //[esp] = [[ebp+12]+4] addl    $4, %eax movl    (%eax), %eax movl    %eax, (%esp) call    strlen          //eax = length of string  movl    %eax, %edx      //edx = length of string movl    %edx, %eax      //useless instruction sall    $2, %eax        //eax = length x 4 addl    %edx, %eax      //eax = length x 5 movl    %eax, (%esp)    //allocate length x 5 bytes call    malloc movl    %eax, 28(%esp)  //[ebp+28] = ptr allocated memory movl    $.lc1, %edx     //edx = offset .lc1 movl    12(%ebp), %eax  //eax = [[ebp+12]+4] addl    $4, %eax movl    (%eax), %eax movl    28(%esp), %ecx  //[esp+8] = ptr allocated memory movl    %ecx, 8(%esp) movl    %edx, 4(%esp)   //[esp+4] = offset .lc1 movl    %eax, (%esp)    //[esp]   = [[ebp+12]+4] call    __isoc99_sscanf //return number of input items matched cmpl    $1, %eax        //if result == 1 je  .l20                //jump l20 movl    $.lc2, (%esp)   //[esp] = offset .lc2 call    puts            //display .lc2 string movl    $1, %eax        //eax = 1 jmp .l19                //jump ???