Programming Forums - View Single Post - How do i convert this code into assembly ??

oxyi · Jan 26th, 2005, 4:17 PM

Im trying to find the GCD of two int,
below is an alog. that I tried to make it into assembly..
but it looks like im missing , can anyone help out ??

Gcd(int a, int b, int *result)
{ while(a!=b)
{
if(a > b)
a = a - b;
else
b = b - a;
}
*result = a;
}

(Toggle Plain Text)

void lab1( int a, int b, int *result )
{
__asm
{
mov esi, result
//save the current status of the registers
push eax
push ebx
push edx

//put the variables into the registers
mov eax, a
mov ebx, b


START_WHILE:
cmp eax, ebx
je END_WHILE

cmp eax,ebx
jle Else_Block

sub eax, ebx
jmp START_WHILE

Else_Block:
sub ebx, eax
jmp START_WHILE

END_WHILE:
move edx



//put the answer to result
mov [esi][0], edx

//restore the original status of registers.
pop edx
pop ebx
pop eax
}
return;

}

Jan 26th, 2005, 4:17 PM	#1
oxyi Newbie Join Date: Jan 2005 Posts: 17 Rep Power: 0	How do i convert this code into assembly ?? Im trying to find the GCD of two int, below is an alog. that I tried to make it into assembly.. but it looks like im missing , can anyone help out ?? Gcd(int a, int b, int result) { while(a!=b) { if(a > b) a = a - b; else b = b - a; } result = a; } (Toggle Plain Text) void lab1( int a, int b, int result ) { __asm { mov esi, result //save the current status of the registers push eax push ebx push edx //put the variables into the registers mov eax, a mov ebx, b START_WHILE: cmp eax, ebx je END_WHILE cmp eax,ebx jle Else_Block sub eax, ebx jmp START_WHILE Else_Block: sub ebx, eax jmp START_WHILE END_WHILE: move edx //put the answer to result mov [esi][0], edx //restore the original status of registers. pop edx pop ebx pop eax } return; } void lab1( int a, int b, int result ) { __asm { mov esi, result //save the current status of the registers push eax push ebx push edx //put the variables into the registers mov eax, a mov ebx, b START_WHILE: cmp eax, ebx je END_WHILE cmp eax,ebx jle Else_Block sub eax, ebx jmp START_WHILE Else_Block: sub ebx, eax jmp START_WHILE END_WHILE: move edx //put the answer to result mov [esi][0], edx //restore the original status of registers. pop edx pop ebx pop eax } return; }