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print_asm.py
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print_asm.py
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from functools import reduce
from llvmlite import ir, binding
import fileinput
import json
import sys
import io
import ctypes
def is_flag(name):
flags = ['pf_0', 'zf_0', 'af_0', 'cf_0', 'of_0', 'sf_0']
return name in flags
class AsmPrinter(object):
def __init__(self, program, file, with_flags = False):
self._program = program
self._file = file
self._indent = 0
self._with_flags = with_flags
def indent(self, num = 2):
self._indent += num
def outdent(self, num = 2):
self.indent(-num)
assert(self._indent >= 0)
def write(self, str):
self._file.write(' '*self._indent)
self._file.write(str)
def writeln(self, str = ''):
self.write(str)
self._file.write('\n')
self._file.flush()
def run(self):
for fn in program['functions']:
self.print_fn(fn, program['functions'][fn])
def print_fn(self, name, body):
self.writeln()
self.writeln('functon {}:'.format(name))
self.indent()
for bb in body['vertices']:
self.print_bb(bb)
self.writeln()
self.outdent()
def print_bb(self, bb):
self.write('{}:'.format(bb['name']))
self.indent()
dirty = False
for s in bb['stmts']:
nl = self.print_stmt(s)
dirty = dirty or nl
if not dirty:
self.writeln()
self.outdent()
def print_stmt(self, s):
if s['op'] == 'InsnStmt':
return self.print_InsnStmt(s)
elif s['op'] == 'RegWriteStmt':
return self.print_RegWriteStmt(s)
elif s['op'] == 'MemWriteStmt':
return self.print_MemWriteStmt(s)
elif s['op'] == 'CallStmt':
return self.print_CallStmt(s)
else:
self.writeln(s['op'])
return True
return False
def print_InsnStmt(self, s):
self.writeln(s['asm'])
return True
def print_RegWriteStmt(self, s):
var = self.var_str(s['var'])
if not self._with_flags and is_flag(var):
return False
exp = self.exp_str(s['exp'])
self.writeln('{} := {}'.format(var, exp))
return True
def print_CallStmt(self, s):
self.writeln('{} {}'.format(s['op'], s['calltype']))
return True
def print_MemWriteStmt(self, s):
addr = self.addr_str(s['addr'])
exp = self.exp_str(s['exp'])
self.writeln("MEM[{}] := {}".format(addr, exp))
def addr_str(self, addr):
out = io.StringIO()
self.print_addr(addr, out)
return out.getvalue()
def print_addr(self, addr, out):
assert (addr['type'] == 'exp')
op = addr['op']
if op == 'variable':
out.write(self.var_str(addr))
elif op == 'constant':
out.write(self.const_str(addr))
elif op == 'add':
kids = addr['children']
assert(len(kids) == 2)
self.print_addr(kids[0], out)
out.write(' + ')
self.print_addr(kids[1], out)
def var_str(self, var):
if var['varname'] != '':
return str(var['varname'])
else:
return 'v{}'.format(var['varid'])
def const_str(self, v):
val = int(v['const'], 16)
if v['width'] == '64':
val = ctypes.c_int64(val)
val = val.value
elif v['width'] == '32':
val = ctypes.c_int32(val)
val = val.value
else:
pass
return str(val)
def exp_str(self, v):
out = io.StringIO()
self.print_exp(v, out)
return out.getvalue()
def print_exp(self, v, out):
op = v['op']
if op == 'variable':
out.write(self.var_str(v))
elif op == 'constant':
out.write(self.const_str(v))
elif op == 'add':
kids = v['children']
assert(len(kids) == 2)
self.print_exp(kids[0], out)
out.write(' + ')
self.print_exp(kids[1], out)
elif op == 'read':
array, idx = v['children']
self.print_exp(array, out)
out.write('[')
self.print_exp(idx, out)
out.write(']')
elif op == 'concat':
kids = v['children']
kids = [self.exp_str(k) for k in kids]
out.write(' :: '.join(kids))
elif op == 'extract':
low, high, body = v['children']
self.print_exp(body, out)
out.write('[{}:{}]'.format(int(low['const']), int(high['const'])))
elif op == 'sdiv' or op == 'smod':
kids = v['children']
kid0, kid1 = kids
self.print_exp(kid0, out)
out.write(' ' + op + ' ')
self.print_exp(kid1, out)
elif op == 'sextend' or op == 'uextend':
kids = v['children']
kid0, kid1 = kids
out.write(op[0:4] + ' ')
self.print_exp(kid0, out)
out.write(', ')
self.print_exp(kid1, out)
elif op == 'and':
kids = v['children']
kid0, kid1 = kids
self.print_exp(kid0, out)
out.write(' & ')
self.print_exp(kid1, out)
elif op == 'ite':
kids = v['children']
cond, then_br, else_br = kids
out.write('ite(')
self.print_exp(cond, out)
out.write(', ')
self.print_exp(then_br, out)
out.write(', ')
self.print_exp(else_br, out)
out.write(')')
else:
out.write(str(v))
program = json.loads("\n".join(f for f in fileinput.input()))
printer = AsmPrinter(program, sys.stdout)
printer.run()