// Credits: Professor Leonard Manzara
//
// NOTE: To test the program, run the program normally but add some command line arguments.
// Example: ./a.out 1 2 3
// Example: ./a.out MM DD YYYY

i_r	.req	w19	// index for our loop (integer)
argc_r	.req	w20	// arg-count, or number of arguments passed into main() (integer)
argv_r	.req	x21	// arv-values, the base address of an array of pointers
			// each pointer points to an argument

// To load the values of each argument, you first get the base address of argv. Then you
// use left shift the index i_r (multiply 8) and use that as an offset to get the pointer
// for the argument you want. Load from that pointer to get the value of the argument.

fmt:	.string	"%s\n"

	.balign 4
	.global main
main:	stp	x29, x30, [sp, -16]!
	mov	x29, sp

	mov	argc_r, w0			// copy argc
	mov	argv_r, x1			// copy argv

	mov	i_r, 0				// i= 0
	b	test

top:	adrp	x0, fmt
	add	x0, x0, :lo12:fmt		// set up 1st arg

	ldr	x1, [argv_r, i_r, SXTW 3]	// set up 2nd arg

	bl	printf				// call printf

	add	i_r, i_r, 1			// i++
test:	cmp	i_r, argc_r			// loop while i < argc
	b.lt	top

	ldp	x29, x30, [sp], 16
	ret