Write Pip assembler code equivalent to the Python below. The easiest way and mos

Question

Write Pip assembler code equivalent to the Python below. The easiest way and most encouraged way is using symbolic code labels as needed (followed by a colon) and symbolic data names, as understood by pipGUI.py. You may do it with numeric data addresses and/or numeric jump addresses as in the book or the book's applet, but in that case, do make a comment as to what memory locations represent the x, y, and z of the Python version! if x < 0: y = y + 2 else: y = x z = y + z You are encouraged to write to a file pipa.asm, load it into pipGUI.py, give values manually to x, y, and z, run to test the results. Press INIT and go back to set new x, y, z values and test some more...

Explanation / Answer

This can be done writing C extension wrapper for the code fragment implemented in assembly and then linking to the obj file.

pipa.asm

Symbols Used
X for a symbolic or numeric data address.
#N for a literal number N as data
Acc refers to the accumulator
L refers to a symbolic code label or numeric code address
Instructions Pseudo Python syntax for what happens
Data Flow
LOD X (or #N) Acc = X (or N)
STO X X = Acc (copy Acc to location X)
Control
JMP L IP = L (go to instruction L)
JMZ L if Acc==0: IP = L else: IP = IP+2 (normal)
NOP No operation; just go to next instruction
HLT Halt execution
Arithmetic-Logic
ADD X (or #N) Acc = Acc + X (or N)
SUB X (or #N) Acc = Acc - X (or N)
MUL X (or #N) Acc = Acc * X (or N)
DIV X (or #N) Acc = Acc / X (or N)
AND X (or #N) if Acc != 0 and X != 0: Acc=1 else: Acc=0
NOT if Acc == 0: Acc = 1 else: Acc = 0
CPZ X if X == 0: Acc = 1 else: Acc = 0
CPL X if X < 0: Acc = 1 else: Acc = 0

pip.c

#include <Python.h>
void myfunc(void);
static PyObject*
py_myfunc(PyObject* self, PyObject* args)
{
if (!PyArg_ParseTuple(args, ""))
return NULL;
myfunc();
Py_RETURN_NONE;
}

static PyMethodDef MyMethods[] =
{
{"myfunc", py_myfunc, METH_VARARGS, NULL},
{NULL, NULL, 0, NULL}
};

PyMODINIT_FUNC initmyext(void)
{
(void) Py_InitModule("myext", MyMethods);
}

pipGUI.py

from distutils.core import setup, Extension
setup(name='myext', ext_modules=[
Extension('myext', ['myext.c'], extra_objects=['myfunc.obj'])])

X = input('Choose a number')
print ('Number%s ' % (X))

Y = input('Choose a number')
print ('Number%s ' % (Y))

Z = input('Choose a number')
print ('Number%s ' % (Z))

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