Multiplying without MUL

gistfile1.s

.data
.align 4
varx:	.long 12
vary:	.long 3
.text
.globl main

main:
	mov (varx),%eax
	mov (vary),%ebx
	mov $0,%ecx

	#; loop {
	L1:
		cmp $0,%ebx
		jz END

		#; if (LSb == 1)
		#;    then ONE1
		#;    else ZER0
		shr $1,%ebx
		jc ONE1
		jmp ZER0

		ZER0:
			jmp LE1

		ONE1:
			add %eax,%ecx
			jmp LE1

	#; } end
	LE1:
		shl $1,%eax
		jmp L1

END:
	call stop