/* hand-coded function to compute sum of array of numbers */
	.section	.rodata
STR1:	.string		"answer is %d\n"
	.text
	
.globl main               /* this is needed! */
main:	push %ebp
	mov  %esp, %ebp
	sub $16, %esp     /* allocate some space */
	and $-16, %esp   
	pushl $40
	call malloc
	add $4, %esp
	mov %eax, %edx   /* edx is going to be base register */
        /* fill array with numbers 100 to 1000 */
	mov $100, %eax
	mov $0, %edi    /* edi will be index register */
loop:	cmp $10, %edi
	je  loopexit
	mov %eax, (%edx,%edi,4)
	add $100, %eax
	inc %edi
	jmp loop
loopexit:	 /* now sum backwards, using -4(ebp) to hold value */
	movl $0, -4(%ebp)
loop2:	dec %edi  /* this will also modify flags */
	/* cmp $-1, %edi */
	jz exit2
	mov (%edx,%edi,4), %eax
	add %eax, -4(%ebp)  /* add to accumulator */
	jmp loop2
exit2:	
	pushl -4(%ebp)  /* surprised this is valid (mem-mem op) */
	pushl $STR1     /* 1st arg to printf - why pushl? */
	call printf
	add $8, %esp

	mov $0, %eax   /* return 0 */
	mov %ebp, %esp
	pop %ebp
	ret