#
# File: local1_mod.s
# Author: William T Krieger, Oct 2003
#
# My modification of the local1 test case. 
# It demonstrates using local variables.

	.text
FMT0:	.ascii "Sum is %d\0"
	.align 4

#
# Function: _main()
# void _main()
# Demonstrates how to setup/use local variables.

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

	pushl $25			# call sum( 75, 25)
	pushl $75
	call sum
	addl $8,%esp

	pushl %eax			# call printf( fmt, %eax ret value)
	pushl $FMT0
	call _printf
	addl $8,%esp

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

#
# Function: sum()
# int sum( int p1, int p2)
# The return value is p1 + p2.

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

	subl $4,%esp		# adjust stack for local vars
						# int tmp = -4(%ebp);

	movl 8(%ebp),%eax		# %eax = p1
	movl 12(%ebp),%edx		# %edx = p2
	addl %eax,%edx			# %edx = %edx + %eax
	movl %edx,-4(%ebp)		# tmp = %ecx

	movl -4(%ebp),%eax		# %eax return value = tmp

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