COMMENT !
	This program was created by Nick Meek.
	This program uses bitwise multiplication to calculate
	the product of two small numbers.
	It was last modified on 10/31/16.
!
INCLUDE Irvine32.inc
.data
	var1 BYTE 00000110b ; multiplicant 6h
	var2 BYTE 00000011b ; multiplier 3h = 3
.code
main PROC
	call MulTwo
	;call MulTwoShift
	call MulTwoLoop
	exit ; exit the program
main ENDP
MulTwo PROC
	PUSHAD ; pushes all of the 32-bit registers to the stack
	PUSHFD ; pushed all of the 32-bit flags to the stack
	MOV EAX,123456h
	MOV EBX,789ABCh
	MUL EBX ; output EDX:EAX
	POPFD ; pops all of the 32-bit flags from the stack
	POPAD ; pops all of the 32-bit registers from the stack
	RET	; return to where procedure was called
MulTwo ENDP
MulTwoShift PROC
	PUSHAD ; pushes all of the 32-bit registers to the stack
	PUSHFD ; pushed all of the 32-bit flags to the stack
	MOV AX,0
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L1
	ADD AL,var1
	L1:
	SHL var1,1
	SHR var2,1
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L2
	ADD AL,var1
	L2:
	SHL var1,1
	SHR var2,1
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L3
	ADD AL,var1
	L3:
	SHL var1,1
	SHR var2,1
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L4
	ADD AL,var1
	L4:
	SHL var1,1
	SHR var2,1
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L5
	ADD AL,var1
	L5:
	SHL var1,1
	SHR var2,1
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L6
	ADD AL,var1
	L6:
	SHL var1,1
	SHR var2,1
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L7
	ADD AL,var1
	L7:
	SHL var1,1
	SHR var2,1
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L8
	ADD AL,var1
	L8:
	SHL var1,1
	SHR var2,1
	POPFD ; pops all of the 32-bit flags from the stack
	POPAD ; pops all of the 32-bit registers from the stack
	RET	; return to where procedure was called
MulTwoShift ENDP
MulTwoLoop PROC
	PUSHAD ; pushes all of the 32-bit registers to the stack
	PUSHFD ; pushed all of the 32-bit flags to the stack
	MOV AX,0
	MOV ECX,8 ; initialize loop counter to 8
	L1:
	MOV AH,var2
	AND AH,00000001b
	CMP AH,00000001b
	JNE L2
	ADD AL,var1
	L2:
	SHL var1,1
	SHR var2,1
	LOOP L1
	POPFD ; pops all of the 32-bit flags from the stack
	POPAD ; pops all of the 32-bit registers from the stack
	RET	; return to where procedure was called
MulTwoLoop ENDP
END main