PA5/PA5RunningExample.java.s at master · CS-4620/PA5 · GitHub

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    .file  "main.java"
__SREG__ = 0x3f
__SP_H__ = 0x3e
__SP_L__ = 0x3d
__tmp_reg__ = 0
__zero_reg__ = 1
    .global __do_copy_data
    .global __do_clear_bss
    .text
.global main
    .type   main, @function
main:
    push r29
    push r28
    in r28,__SP_L__
    in r29,__SP_H__
/* prologue: function */
    call _Z18MeggyJrSimpleSetupv
    /* Need to call this so that the meggy library gets set up */


    # NewExp
    ldi    r24, lo8(4)
    ldi    r25, hi8(4)
    # allocating object of size 4 on heap
    call    malloc
    # push object address
    # push two byte expression onto stack
    push   r25
    push   r24

    # True/1 expression
    ldi    r22, 1
    # push one byte expression onto stack
    push   r22

    #### function call
    # put parameter values into appropriate registers
    # load a one byte expression off stack
    pop    r22
    # receiver will be passed as first param
    # load a two byte expression off stack
    pop    r24
    pop    r25

    call    C_foo


/* epilogue start */
    endLabel:
    jmp endLabel
    ret
    .size   main, .-main


    .text
.global C_foo
    .type  C_foo, @function
C_foo:
    push   r29
    push   r28
    # make space for locals and params
    ldi    r30, 0
    push   r30
    push   r30
    push   r30
    push   r30
    push   r30

    # Copy stack pointer to frame pointer
    in     r28,__SP_L__
    in     r29,__SP_H__

    # save off parameters
    std    Y + 2, r25
    std    Y + 1, r24
    std    Y + 3, r22
/* done with function C_foo prologue */


    # Load constant int 3
    ldi    r24,lo8(3)
    ldi    r25,hi8(3)
    # push two byte expression onto stack
    push   r25
    push   r24

/* epilogue start for C_foo */
    # handle return value
    # load a two byte expression off stack
    pop    r24
    pop    r25
    # pop space off stack for parameters and locals
    pop    r30
    pop    r30
    pop    r30
    pop    r30
    pop    r30
    # restoring the frame pointer
    pop    r28
    pop    r29
    ret
    .size C_foo, .-C_foo