somatorio

.section .data
	.global A
	.global B
	.global j

.section .text
	.global swapBytes #Declared function


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

###################################
#Save registers
###################################
	pushl %ebx
	pushl %esi
	pushl %edi

###################################
# Body of the function
# here we implement our function...
###################################

	#Cleans 32bit registers
		movl $0, %eax
		movl $0, %ebx
		movl $0, %ecx
		movl $0, %edx
		movl $0, %esi
		movl $0, %edi

	#Places variables values to registers
		movl A, %eax	#Places A value to eax register
		movl B, %ebx	#Places B value to ebp register

	#Defines limit
		movl j, %ecx	#Places j in ecx register
		movl $1, %edx	#Places 1 in edx register

		jmp loop		#Jumps loop

	loop:
		imull %edx, %eax 	#multiplies edx value to eax value (A)
		idiv %ebx			#divids eax by ebx (ebx is divisor)
		addl %eax, %esi		#adds eax value to esi (empty in the beginning), palcing the result in esi
		movl A, %eax

		#Compare to limit
		cmpl %ecx, %ebx   #Compares registers values (ebx - ecx)
		jge endLoop		  #Jumps loop if greater or equal


		#Iterating i++
		incl %edx	#adds 1 to edx value

		jmp loop	#Jumps loop


	endLoop:
		movl $0, %eax	#Cleans eax register
		movl %esi, %eax	#Moves esi content to eax

###################################
#Restore registers
###################################
	popl %edi
	popl %esi
	popl %ebx

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

	ret 			#Return from the function