def data_sink(self, value):
"""
This is a private function, you shouldn't need to call this directly.
"""
if self.type_ == "int":
self.l.append(value)
self.times.append(self.chip.time)
elif self.type_ == "long":
if self.high_word:
self.high_word = not self.high_word
self.l.append(join_words(value, self.low))
self.times.append(self.chip.time)
else:
self.high_word = not self.high_word
self.low = value
elif self.type_ == "float":
self.l.append(bits_to_float(value))
self.times.append(self.chip.time)
elif self.type_ == "double":
if self.high_word:
self.high_word = not self.high_word
self.l.append(bits_to_double(join_words(value, self.low)))
self.times.append(self.chip.time)
else:
self.high_word = not self.high_word
self.low = value
def simulation_step(self):
"""execute the python simulation by one step"""
l = self.get_line()
f = self.get_file()
if f in self.breakpoints:
if l in self.breakpoints[f]:
raise BreakSim
instruction = self.instructions[self.program_counter]
current_stack = self.registers.get(register_map.tos, 0)
self.max_stack = max([current_stack, self.max_stack])
if self.profile:
trace = instruction.get("trace", "-")
lines = self.files.get(trace.filename, {})
lines[trace.lineno] = lines.get(trace.lineno, 0) + 1
self.files[trace.filename] = lines
if "literal" in instruction:
literal = instruction["literal"]
if "label" in instruction:
literal = instruction["label"]
# read operands
#
a = instruction.get("a", 0)
b = instruction.get("b", 0)
z = instruction.get("z", 0)
operand_b = self.registers.get(b, 0)
operand_a = self.registers.get(a, 0)
this_instruction = self.program_counter
self.program_counter += 1
wait = False
result = None
if instruction["op"] == "stop":
self.program_counter = this_instruction
wait = True
for file_ in self.input_files.values():
file_.close()
for file_ in self.output_files.values():
file_.close()
raise StopSim
elif instruction["op"] == "literal":
if literal & 0x8000:
result = -65536 | literal
else:
result = literal
result &= 0xffffffff
elif instruction["op"] == "addl":
if literal & 0x8000:
sext = -65536 | literal
else:
sext = literal
result = sext + operand_a
result &= 0xffffffff
elif instruction["op"] == "literal_hi":
if literal & 0x8000:
sext = -65536 | literal
else:
sext = literal
result = (sext << 16) | (operand_a & 0x0000ffff)
result &= 0xffffffff
elif instruction["op"] == "store":
self.memory[operand_a] = operand_b
elif instruction["op"] == "load":
result = self.memory.get(operand_a, 0)
elif instruction["op"] == "call":
result = this_instruction + 1
self.program_counter = literal
elif instruction["op"] == "return":
self.program_counter = operand_a
elif instruction["op"] == "a_lo":
result = self.a_lo
self.a_lo = operand_a
elif instruction["op"] == "b_lo":
result = self.b_lo
self.b_lo = operand_a
elif instruction["op"] == "a_hi":
result = self.a_hi
self.a_hi = operand_a
elif instruction["op"] == "b_hi":
result = self.b_hi
self.b_hi = operand_a
elif instruction["op"] == "not":
result = (~operand_a) & 0xffffffff
elif instruction["op"] == "int_to_long":
if operand_a & 0x80000000:
result = 0xffffffff
else:
result = 0
elif instruction["op"] == "int_to_float":
f = float(to_32_signed(self.a_lo))
self.a_lo = float_to_bits(f)
elif instruction["op"] == "float_to_int":
i = bits_to_float(self.a_lo)
if math.isnan(i):
self.a_lo = 0
else:
self.a_lo = int(i) & 0xffffffff
elif instruction["op"] == "long_to_double":
double = float(to_64_signed(chips_c.join_words(self.a_hi, self.a_lo)))
if math.isnan(double):
self.a_hi = 0
self.a_lo = 0
else:
self.a_hi = chips_c.high_word(double_to_bits(double))
self.a_lo = chips_c.low_word(double_to_bits(double))
elif instruction["op"] == "double_to_long":
bits = int(bits_to_double(chips_c.join_words(self.a_hi, self.a_lo)))
bits &= 0xffffffffffffffff
self.a_hi = chips_c.high_word(bits)
self.a_lo = chips_c.low_word(bits)
elif instruction["op"] == "float_to_double":
f = bits_to_float(self.a_lo)
bits = double_to_bits(f)
self.a_hi = chips_c.high_word(bits)
self.a_lo = chips_c.low_word(bits)
elif instruction["op"] == "double_to_float":
f = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
self.a_lo = float_to_bits(f)
elif instruction["op"] == "add":
total = add(operand_a, operand_b, 0);
result = total.lo
self.carry = total.hi
elif instruction["op"] == "add_with_carry":
total = add(operand_a, operand_b, self.carry);
result = total.lo
self.carry = total.hi
elif instruction["op"] == "subtract":
total = subtract(operand_a, operand_b, 1);
result = total.lo
self.carry = total.hi
elif instruction["op"] == "subtract_with_carry":
total = subtract(operand_a, operand_b, self.carry);
result = total.lo
self.carry = total.hi
elif instruction["op"] == "multiply":
lw = operand_a * operand_b
self.carry = chips_c.high_word(lw)
result = chips_c.low_word(lw)
elif instruction["op"] == "divide":
a = operand_a
b = operand_b
result = chips_c.divide(a, b)
elif instruction["op"] == "unsigned_divide":
a = operand_a
b = operand_b
result = chips_c.unsigned_divide(a, b)
elif instruction["op"] == "modulo":
a = operand_a
b = operand_b
result = chips_c.modulo(a, b)
elif instruction["op"] == "unsigned_modulo":
a = operand_a
b = operand_b
result = chips_c.unsigned_modulo(a, b)
elif instruction["op"] == "long_divide":
a = chips_c.join_words(self.a_hi, self.a_lo)
b = chips_c.join_words(self.b_hi, self.b_lo)
quotient = chips_c.long_divide(a, b)
self.a_hi = chips_c.high_word(quotient)
self.a_lo = chips_c.low_word(quotient)
elif instruction["op"] == "long_modulo":
a = chips_c.join_words(self.a_hi, self.a_lo)
b = chips_c.join_words(self.b_hi, self.b_lo)
remainder = chips_c.long_modulo(a, b)
self.a_hi = chips_c.high_word(remainder)
self.a_lo = chips_c.low_word(remainder)
elif instruction["op"] == "unsigned_long_divide":
a = chips_c.join_words(self.a_hi, self.a_lo)
b = chips_c.join_words(self.b_hi, self.b_lo)
quotient = chips_c.unsigned_long_divide(a, b)
self.a_hi = chips_c.high_word(quotient)
self.a_lo = chips_c.low_word(quotient)
elif instruction["op"] == "unsigned_long_modulo":
a = chips_c.join_words(self.a_hi, self.a_lo)
b = chips_c.join_words(self.b_hi, self.b_lo)
remainder = chips_c.unsigned_long_modulo(a, b)
self.a_hi = chips_c.high_word(remainder)
self.a_lo = chips_c.low_word(remainder)
elif instruction["op"] == "carry":
result = self.carry
elif instruction["op"] == "or":
result = operand_a | operand_b
elif instruction["op"] == "and":
result = operand_a & operand_b
elif instruction["op"] == "xor":
result = operand_a ^ operand_b
elif instruction["op"] == "shift_left":
total = shift_left(operand_a, operand_b, 0)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "shift_left_with_carry":
total = shift_left(operand_a, operand_b, self.carry)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "shift_right":
total = shift_right(operand_a, operand_b)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "unsigned_shift_right":
total = unsigned_shift_right(operand_a, operand_b, 0)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "shift_right_with_carry":
total = unsigned_shift_right(operand_a, operand_b, self.carry)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "greater":
result = greater(operand_a, operand_b)
elif instruction["op"] == "greater_equal":
result = greater_equal(operand_a, operand_b)
elif instruction["op"] == "unsigned_greater":
result = unsigned_greater(operand_a, operand_b)
elif instruction["op"] == "unsigned_greater_equal":
result = unsigned_greater_equal(operand_a, operand_b)
elif instruction["op"] == "equal":
result = operand_a == operand_b
elif instruction["op"] == "not_equal":
result = operand_a != operand_b
elif instruction["op"] == "jmp_if_false":
if operand_a == 0:
self.program_counter = literal
elif instruction["op"] == "jmp_if_true":
if operand_a != 0:
self.program_counter = literal
elif instruction["op"] == "goto":
self.program_counter = literal
elif instruction["op"] == "timer_low":
result = self.clock&0xffffffff
elif instruction["op"] == "timer_high":
result = self.clock>>32
elif instruction["op"] == "file_read":
value = self.input_files[instruction["filename"]].getline()
result = value
elif instruction["op"] == "float_file_write":
self.output_files[instruction["file_name"]].write(
"%.7f\n" %
bits_to_float(operand_a))
elif instruction["op"] == "unsigned_file_write":
self.output_files[instruction["file_name"]].write(
"%i\n" %
operand_a)
elif instruction["op"] == "file_write":
self.output_files[instruction["file_name"]].write(
"%i\n" %
to_32_signed(operand_a))
elif instruction["op"] == "read":
if operand_a not in self.inputs:
result = 0
else:
input_ = self.inputs[operand_a]
if input_.src_rdy and input_.dst_rdy:
result = input_.q
input_.next_dst_rdy = False
else:
input_.next_dst_rdy = True
wait = True
elif instruction["op"] == "ready":
if operand_a not in self.inputs:
operand_a = 0
else:
input_ = self.inputs[operand_a]
if input_.src_rdy:
result = 1
else:
result = 0
elif instruction["op"] == "output_ready":
if operand_a not in self.outputs:
operand_a = 0
else:
output_ = self.outputs[operand_a]
if output_.dst_rdy:
result = 1
else:
result = 0
elif instruction["op"] == "write":
if operand_a not in self.outputs:
pass
else:
output_ = self.outputs[operand_a]
if output_.src_rdy and output_.dst_rdy:
output_.next_src_rdy = False
else:
output_.q = operand_b
output_.next_src_rdy = True
wait = True
elif instruction["op"] == "float_add":
a = operand_a
b = operand_b
float_ = bits_to_float(a)
floatb = bits_to_float(b)
result = float_to_bits(float_ + floatb)
elif instruction["op"] == "float_subtract":
a = operand_a
b = operand_b
float_ = bits_to_float(a)
floatb = bits_to_float(b)
result = float_to_bits(float_ - floatb)
elif instruction["op"] == "float_multiply":
a = operand_a
b = operand_b
float_ = bits_to_float(a)
floatb = bits_to_float(b)
result = float_to_bits(float_ * floatb)
elif instruction["op"] == "float_divide":
a = operand_a
b = operand_b
float_ = bits_to_float(a)
floatb = bits_to_float(b)
try:
result = float_to_bits(float_ / floatb)
except ZeroDivisionError:
result = float_to_bits(float("nan"))
elif instruction["op"] == "long_float_add":
double = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
doubleb = bits_to_double(chips_c.join_words(self.b_hi, self.b_lo))
self.a_hi = chips_c.high_word(double_to_bits(double + doubleb))
self.a_lo = chips_c.low_word(double_to_bits(double + doubleb))
elif instruction["op"] == "long_float_subtract":
double = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
doubleb = bits_to_double(chips_c.join_words(self.b_hi, self.b_lo))
self.a_hi = chips_c.high_word(double_to_bits(double - doubleb))
self.a_lo = chips_c.low_word(double_to_bits(double - doubleb))
elif instruction["op"] == "long_float_multiply":
double = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
doubleb = bits_to_double(chips_c.join_words(self.b_hi, self.b_lo))
self.a_hi = chips_c.high_word(double_to_bits(double * doubleb))
self.a_lo = chips_c.low_word(double_to_bits(double * doubleb))
elif instruction["op"] == "long_float_divide":
double = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
doubleb = bits_to_double(chips_c.join_words(self.b_hi, self.b_lo))
try:
self.a_hi = chips_c.high_word(double_to_bits(double / doubleb))
self.a_lo = chips_c.low_word(double_to_bits(double / doubleb))
except ZeroDivisionError:
self.a_hi = chips_c.high_word(double_to_bits(float("nan")))
self.a_lo = chips_c.low_word(double_to_bits(float("nan")))
elif instruction["op"] == "long_float_file_write":
long_word = chips_c.join_words(self.a_hi, self.a_lo)
self.output_files[instruction["file_name"]].write(
"%.16f\n" %
bits_to_double(long_word))
elif instruction["op"] == "long_file_write":
long_word = chips_c.join_words(self.a_hi, self.a_lo)
self.output_files[instruction["file_name"]].write(
"%f\n" %
long_word)
elif instruction["op"] == "assert":
if operand_a == 0:
raise ChipsAssertionFail(
instruction["file"],
instruction["line"])
elif instruction["op"] == "report":
print "%d (report (int) at line: %s in file: %s)" % (
to_32_signed(self.a_lo),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "long_report":
print "%d (report (long) at line: %s in file: %s)" % (
to_64_signed(chips_c.join_words(self.a_hi, self.a_lo)),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "float_report":
print "%f (report (float) at line: %s in file: %s)" % (
bits_to_float(self.a_lo),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "long_float_report":
print "%s (report (double) at line: %s in file: %s)" % (
bits_to_double(chips_c.join_words(self.a_hi, self.a_lo)),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "unsigned_report":
print "%d (report (unsigned) at line: %s in file: %s)" % (
self.a_lo,
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "long_unsigned_report":
print "%d (report (unsigned long) at line: %s in file: %s)" % (
chips_c.join_words(self.a_hi, self.a_lo),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "wait_clocks":
if self.timer == operand_a:
wait = False
self.timer = 0
else:
wait = True
self.timer += 1
else:
print "Unknown machine instruction", instruction["op"]
sys.exit(-1)
# Write data back
if result is not None:
self.registers[z] = result
# manipulate stack pointer
if wait:
self.program_counter = this_instruction
self.clock += 1
def simulation_step(self):
"""execute the python simulation by one step"""
l = self.get_line()
f = self.get_file()
if f in self.breakpoints:
if l in self.breakpoints[f]:
raise BreakSim
instruction = self.instructions[self.program_counter]
current_stack = self.registers.get(register_map.tos, 0)
self.max_stack = max([current_stack, self.max_stack])
if self.profile:
trace = instruction.get("trace", "-")
lines = self.files.get(trace.filename, {})
lines[trace.lineno] = lines.get(trace.lineno, 0) + 1
self.files[trace.filename] = lines
literal = 0
if "literal" in instruction:
literal = instruction["literal"]
if "label" in instruction:
literal = instruction["label"]
# read operands
#
a = instruction.get("a", 0)
b = instruction.get("b", 0)
z = instruction.get("z", 0)
operand_b = self.registers.get(b, 0)
operand_a = self.registers.get(a, 0)
operand_z = self.registers.get(z, 0)
this_instruction = self.program_counter
self.program_counter += 1
wait = False
result = None
unsigned_literal = literal
#literal = interpret_twos_complement(unsigned_literal, 16)
signed_literal = interpret_twos_complement(unsigned_literal, 16)
if instruction["op"] == "addl":
literal = literal & 0xffff
# if literal < 0:
# print(instruction["op"])
if instruction["op"] == "stop":
self.program_counter = this_instruction
wait = True
for file_ in self.input_files.values():
file_.close()
for file_ in self.output_files.values():
file_.close()
raise StopSim
elif instruction["op"] == "literal":
if literal & 0x8000:
result = -65536 | literal
else:
result = literal
result &= 0xffffffff
elif instruction["op"] == "addl":
if literal & 0x8000:
sext = -65536 | literal
else:
sext = literal
result = sext + operand_a
result &= 0xffffffff
elif instruction["op"] == "literal_hi":
if literal & 0x8000:
sext = -65536 | literal
else:
sext = literal
result = (sext << 16) | (operand_a & 0x0000ffff)
result &= 0xffffffff
elif instruction["op"] == "store":
offset = interpret_twos_complement(literal, 14)
self.memory.store(operand_z + offset, operand_a)
elif instruction["op"] == "store8":
offset = interpret_twos_complement(literal, 14)
self.memory.store_8(operand_z + offset, operand_a)
elif instruction["op"] == "store16":
offset = interpret_twos_complement(literal, 14)
self.memory.store_16(operand_z + offset, operand_a)
elif instruction["op"] == "load":
result = self.memory.load(operand_a)
elif instruction["op"] == "load_disp":
offset = interpret_twos_complement(literal, 13)
result = self.memory.load(operand_a + offset)
elif instruction["op"] == "load8":
offset = interpret_twos_complement(literal, 13)
result = self.memory.load_8(operand_a + offset,
literal & 0x8000 != 0)
elif instruction["op"] == "load16":
offset = interpret_twos_complement(literal, 13)
result = self.memory.load_16(operand_a + offset,
literal & 0x8000 != 0)
elif instruction["op"] == "call":
result = this_instruction + 1
self.program_counter = literal
elif instruction["op"] == "return":
self.program_counter = operand_a
elif instruction["op"] == "a_lo":
result = self.a_lo
self.a_lo = operand_a
elif instruction["op"] == "b_lo":
result = self.b_lo
self.b_lo = operand_a
elif instruction["op"] == "a_hi":
result = self.a_hi
self.a_hi = operand_a
elif instruction["op"] == "b_hi":
result = self.b_hi
self.b_hi = operand_a
elif instruction["op"] == "a_lo_in":
self.a_lo = operand_a
elif instruction["op"] == "b_lo_in":
self.b_lo = operand_a
elif instruction["op"] == "a_hi_in":
self.a_hi = operand_a
elif instruction["op"] == "b_hi_in":
self.b_hi = operand_a
elif instruction["op"] == "a_lo_out":
result = self.a_lo
elif instruction["op"] == "b_lo_out":
result = self.b_lo
elif instruction["op"] == "a_hi_out":
result = self.a_hi
elif instruction["op"] == "b_hi_out":
result = self.b_hi
elif instruction["op"] == "not":
result = (~operand_a) & 0xffffffff
elif instruction["op"] == "int_to_long":
if operand_a & 0x80000000:
result = 0xffffffff
else:
result = 0
elif instruction["op"] == "int_to_float":
f = float(to_32_signed(self.a_lo))
self.a_lo = float_to_bits(f)
elif instruction["op"] == "float_to_int":
i = bits_to_float(self.a_lo)
if math.isnan(i):
self.a_lo = 0
else:
self.a_lo = int(i) & 0xffffffff
elif instruction["op"] == "long_to_double":
double = float(to_64_signed(chips_c.join_words(self.a_hi, self.a_lo)))
if math.isnan(double):
self.a_hi = 0
self.a_lo = 0
else:
self.a_hi = chips_c.high_word(double_to_bits(double))
self.a_lo = chips_c.low_word(double_to_bits(double))
elif instruction["op"] == "double_to_long":
bits = int(bits_to_double(chips_c.join_words(self.a_hi, self.a_lo)))
bits &= 0xffffffffffffffff
self.a_hi = chips_c.high_word(bits)
self.a_lo = chips_c.low_word(bits)
elif instruction["op"] == "float_to_double":
f = bits_to_float(self.a_lo)
bits = double_to_bits(f)
self.a_hi = chips_c.high_word(bits)
self.a_lo = chips_c.low_word(bits)
elif instruction["op"] == "double_to_float":
f = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
self.a_lo = float_to_bits(f)
elif instruction["op"] == "add":
total = add(operand_a, operand_b, 0);
result = total.lo
self.carry = total.hi
elif instruction["op"] == "add_with_carry":
total = add(operand_a, operand_b, self.carry);
result = total.lo
self.carry = total.hi
elif instruction["op"] == "subtract":
total = subtract(operand_a, operand_b, 1);
result = total.lo
self.carry = total.hi
elif instruction["op"] == "subtract_with_carry":
total = subtract(operand_a, operand_b, self.carry);
result = total.lo
self.carry = total.hi
elif instruction["op"] == "multiply":
lw = operand_a * operand_b
self.carry = chips_c.high_word(lw)
result = chips_c.low_word(lw)
elif instruction["op"] == "divide":
a = operand_a
b = operand_b
result = chips_c.divide(a, b)
elif instruction["op"] == "unsigned_divide":
a = operand_a
b = operand_b
result = chips_c.unsigned_divide(a, b)
elif instruction["op"] == "modulo":
a = operand_a
b = operand_b
result = chips_c.modulo(a, b)
elif instruction["op"] == "unsigned_modulo":
a = operand_a
b = operand_b
result = chips_c.unsigned_modulo(a, b)
elif instruction["op"] == "long_divide":
a = chips_c.join_words(self.a_hi, self.a_lo)
b = chips_c.join_words(self.b_hi, self.b_lo)
quotient = chips_c.long_divide(a, b)
self.a_hi = chips_c.high_word(quotient)
self.a_lo = chips_c.low_word(quotient)
elif instruction["op"] == "long_modulo":
a = chips_c.join_words(self.a_hi, self.a_lo)
b = chips_c.join_words(self.b_hi, self.b_lo)
remainder = chips_c.long_modulo(a, b)
self.a_hi = chips_c.high_word(remainder)
self.a_lo = chips_c.low_word(remainder)
elif instruction["op"] == "unsigned_long_divide":
a = chips_c.join_words(self.a_hi, self.a_lo)
b = chips_c.join_words(self.b_hi, self.b_lo)
quotient = chips_c.unsigned_long_divide(a, b)
self.a_hi = chips_c.high_word(quotient)
self.a_lo = chips_c.low_word(quotient)
elif instruction["op"] == "unsigned_long_modulo":
a = chips_c.join_words(self.a_hi, self.a_lo)
b = chips_c.join_words(self.b_hi, self.b_lo)
remainder = chips_c.unsigned_long_modulo(a, b)
self.a_hi = chips_c.high_word(remainder)
self.a_lo = chips_c.low_word(remainder)
elif instruction["op"] == "carry":
result = self.carry
elif instruction["op"] == "or":
result = operand_a | operand_b
elif instruction["op"] == "and":
result = operand_a & operand_b
elif instruction["op"] == "xor":
result = operand_a ^ operand_b
elif instruction["op"] == "shift_left":
total = shift_left(operand_a, operand_b, 0)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "shift_left_with_carry":
total = shift_left(operand_a, operand_b, self.carry)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "shift_right":
total = shift_right(operand_a, operand_b)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "unsigned_shift_right":
total = unsigned_shift_right(operand_a, operand_b, 0)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "shift_right_with_carry":
total = unsigned_shift_right(operand_a, operand_b, self.carry)
result = total.lo
self.carry = total.hi
elif instruction["op"] == "greater":
result = greater(operand_a, operand_b)
elif instruction["op"] == "greater_equal":
result = greater_equal(operand_a, operand_b)
elif instruction["op"] == "unsigned_greater":
result = unsigned_greater(operand_a, operand_b)
elif instruction["op"] == "unsigned_greater_equal":
result = unsigned_greater_equal(operand_a, operand_b)
elif instruction["op"] == "equal":
result = operand_a == operand_b
elif instruction["op"] == "not_equal":
result = operand_a != operand_b
elif instruction["op"] == "jmp_if_false":
if operand_a == 0:
self.program_counter = literal
elif instruction["op"] == "jmp_if_true":
if operand_a != 0:
self.program_counter = literal
elif instruction["op"] == "goto":
self.program_counter = literal
elif instruction["op"] == "timer_low":
result = self.clock&0xffffffff
elif instruction["op"] == "timer_high":
result = self.clock>>32
elif instruction["op"] == "file_read":
value = self.input_files[instruction["filename"]].getline()
result = value
elif instruction["op"] == "float_file_write":
self.output_files[instruction["file_name"]].write(
"%.7f\n" %
bits_to_float(operand_a))
elif instruction["op"] == "unsigned_file_write":
self.output_files[instruction["file_name"]].write(
"%i\n" %
operand_a)
elif instruction["op"] == "file_write":
self.output_files[instruction["file_name"]].write(
"%i\n" %
to_32_signed(operand_a))
elif instruction["op"] == "read":
if operand_a not in self.inputs:
result = 0
else:
input_ = self.inputs[operand_a]
if input_.src_rdy and input_.dst_rdy:
result = input_.q
input_.next_dst_rdy = False
else:
input_.next_dst_rdy = True
wait = True
elif instruction["op"] == "ready":
if operand_a not in self.inputs:
operand_a = 0
else:
input_ = self.inputs[operand_a]
if input_.src_rdy:
result = 1
else:
result = 0
elif instruction["op"] == "output_ready":
if operand_a not in self.outputs:
operand_a = 0
else:
output_ = self.outputs[operand_a]
if output_.dst_rdy:
result = 1
else:
result = 0
elif instruction["op"] == "write":
if operand_a not in self.outputs:
pass
else:
output_ = self.outputs[operand_a]
if output_.src_rdy and output_.dst_rdy:
output_.next_src_rdy = False
else:
output_.q = operand_b
output_.next_src_rdy = True
wait = True
elif instruction["op"] == "float_add":
a = operand_a
b = operand_b
float_ = bits_to_float(a)
floatb = bits_to_float(b)
result = float_to_bits(float_ + floatb)
elif instruction["op"] == "float_subtract":
a = operand_a
b = operand_b
float_ = bits_to_float(a)
floatb = bits_to_float(b)
result = float_to_bits(float_ - floatb)
elif instruction["op"] == "float_multiply":
a = operand_a
b = operand_b
float_ = bits_to_float(a)
floatb = bits_to_float(b)
result = float_to_bits(float_ * floatb)
elif instruction["op"] == "float_divide":
a = operand_a
b = operand_b
float_ = bits_to_float(a)
floatb = bits_to_float(b)
try:
result = float_to_bits(float_ / floatb)
except ZeroDivisionError:
result = float_to_bits(float("nan"))
elif instruction["op"] == "long_float_add":
double = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
doubleb = bits_to_double(chips_c.join_words(self.b_hi, self.b_lo))
self.a_hi = chips_c.high_word(double_to_bits(double + doubleb))
self.a_lo = chips_c.low_word(double_to_bits(double + doubleb))
elif instruction["op"] == "long_float_subtract":
double = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
doubleb = bits_to_double(chips_c.join_words(self.b_hi, self.b_lo))
self.a_hi = chips_c.high_word(double_to_bits(double - doubleb))
self.a_lo = chips_c.low_word(double_to_bits(double - doubleb))
elif instruction["op"] == "long_float_multiply":
double = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
doubleb = bits_to_double(chips_c.join_words(self.b_hi, self.b_lo))
self.a_hi = chips_c.high_word(double_to_bits(double * doubleb))
self.a_lo = chips_c.low_word(double_to_bits(double * doubleb))
elif instruction["op"] == "long_float_divide":
double = bits_to_double(chips_c.join_words(self.a_hi, self.a_lo))
doubleb = bits_to_double(chips_c.join_words(self.b_hi, self.b_lo))
try:
self.a_hi = chips_c.high_word(double_to_bits(double / doubleb))
self.a_lo = chips_c.low_word(double_to_bits(double / doubleb))
except ZeroDivisionError:
self.a_hi = chips_c.high_word(double_to_bits(float("nan")))
self.a_lo = chips_c.low_word(double_to_bits(float("nan")))
elif instruction["op"] == "long_float_file_write":
long_word = chips_c.join_words(self.a_hi, self.a_lo)
self.output_files[instruction["file_name"]].write(
"%.16f\n" %
bits_to_double(long_word))
elif instruction["op"] == "long_file_write":
long_word = chips_c.join_words(self.a_hi, self.a_lo)
self.output_files[instruction["file_name"]].write(
"%f\n" %
long_word)
elif instruction["op"] == "assert":
if operand_a == 0:
raise ChipsAssertionFail(
instruction["file"],
instruction["line"])
elif instruction["op"] == "report":
print "%d (report (int) at line: %s in file: %s)" % (
to_32_signed(self.a_lo),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "long_report":
print "%d (report (long) at line: %s in file: %s)" % (
to_64_signed(chips_c.join_words(self.a_hi, self.a_lo)),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "float_report":
print "%f (report (float) at line: %s in file: %s)" % (
bits_to_float(self.a_lo),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "long_float_report":
print "%s (report (double) at line: %s in file: %s)" % (
bits_to_double(chips_c.join_words(self.a_hi, self.a_lo)),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "unsigned_report":
print "%d (report (unsigned) at line: %s in file: %s)" % (
self.a_lo,
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "long_unsigned_report":
print "%d (report (unsigned long) at line: %s in file: %s)" % (
chips_c.join_words(self.a_hi, self.a_lo),
instruction["line"],
instruction["file"],
)
elif instruction["op"] == "wait_clocks":
if self.timer == operand_a:
wait = False
self.timer = 0
else:
wait = True
self.timer += 1
else:
print "Unknown machine instruction", instruction["op"]
sys.exit(-1)
# Write data back
if result is not None:
self.registers[z] = result
# manipulate stack pointer
if wait:
self.program_counter = this_instruction
self.clock += 1