division in assembly

[flynnwallace]

Can anyone tell me how does division work in the assembly language. I can do problems that involve addition, subtraction, and multiplication but division confuses me.

Flynn

[tnordloh]

div eax,ebx would put the ebx/eax in the eax register, I believe. At least I think so. It's been a while. ANyway, the problem is of cours that div treats everything as an integer and throws away the remainder. There is also fdiv, which you use on floats. I hope this helps.

[paulb]

i dont know assembly so ill do this in C++ language.

This is probably not a help to you, but I am board and I really feel like coding somthing.

int numb1; // Numb 3 = Numb 1 / Numb 2
int numb2;
int numb3;

for (;numb1 >= numb2; numb3++, numb1 = numb1 - numb2){
}

numb1 is the remainder.

Edit: bugfix (Divisions with no remainder were messed up)

[ 26 November 2001: Message edited by: paulb ]

[ 26 November 2001: Message edited by: paulb ]

[JasonC]

Check out the Art of Assembly Language programming at:
http://webster.cs.ucr.edu/Page_asm/0_ArtOfAsm.html

You can read all about it.

Hope this helps

[Whipping Boy]

Some things to remember:
Addition is the only mathematical operation that can be performed by digital logic gates
Subtraction is just addition of a negative number
Multiplication is just repeated addition
Division is just repeated subtraction with a count of the total number of subtractions performed
All other mathematical operations are just a combination of two or more of these operations


[ 26 November 2001: Message edited by: Whipping Boy ]