#
# File: while1.s
# Author: William T Krieger, Oct 2003
#
# My modification of the while1 test case demonstrating a simple while loop.

	.text
FMT0:	.ascii "x = %d\12\0"
FMT1:	.ascii "Done.\0"
	.align 4

#
# Function: _main()
# void _main()
# Deomonstrates a simple while loop.

	.globl _main
_main:
	pushl %ebp			# enter _main()
	movl %esp, %ebp

	subl $4, %esp		# adjust stack for 1 local var
						# x = -4(%ebp)
	movl $7,-4(%ebp)	# x = 7

LOOP_START:
	cmpl $0,-4(%ebp)	# compare( 0, x)
	jg LOOP1_BODY		# if > jump to LOOP1_BODY
	jmp LOOP1_END		# else jump to LOOP_END1

LOOP1_BODY:
	movl -4(%ebp),%eax	# call printf( fmt, x)
	pushl %eax
	pushl $FMT0
	call _printf
	addl $8,%esp

	decl -4(%ebp)		# x--
	jmp LOOP_START		# jump to top of loop

LOOP1_END:
	pushl $FMT1			# call printf( fmt1)
	call _printf
	addl $4,%esp

	movl %ebp, %esp		# exit _main()
	pop %ebp
	ret