projects/hack-vm/vminit.py


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from .utils import *

VMINIT_ASM = """@256
D=A
@SP
M=D
@{prog}$ret_init
D=A
@SP
A=M
M=D
@LCL
D=M
@SP
AM=M+1
M=D
@ARG
D=M
@SP
AM=M+1
M=D
@THIS
D=M
@SP
AM=M+1
M=D
@THAT
D=M
@SP
AM=M+1
M=D
@SP
MD=M+1
@LCL
M=D
@5
D=D-A
@ARG
M=D
@Sys.init
0;JMP
({prog}$ret_init)
"""

def vminit(prog):
    return VMINIT_ASM.format(prog=prog)