; STACK instruction example.
;
; Build/run from examples/:
;   ../utils/mcpu-as -o stack.o stack.s
;   ../utils/mcpu-ld --stack-size=128 -o stack stack.o
;   ../utils/mcpu-run --int-reg=r64@0x00028 stack
;
; Expected output: 22
;
.text
_start_life:
        LDI     r64@0x00000, 11
        LDI     r64@0x00008, 22

        ; STACK grows downward.  cpu-run initializes SP to stack_size.
        PUSH    r64@0x00000
        PUSH    r64@0x00008

        ; Current stack top contains 22, SP+8 contains 11.
        LDSP    r64@0x00010, 8
        STSP    0, r64@0x00000

        POP     r64@0x00018
        POP     r64@0x00020

        ; Reserve a 16-byte local frame without automatic padding.
        ADJSP   -16
        STSP    0, r64@0x00008
        LDSP    r64@0x00028, 0
        ADJSP   16

        HALT