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Merge branch 'wrpll'

This commit is contained in:
Sebastien Bourdeauducq 2019-10-05 10:24:11 +08:00
parent 7b95814cf5 959679d8b7
commit bb5ff46f7d
4 changed files with 963 additions and 0 deletions
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0
artiq/gateware/wrpll/__init__.py Normal file
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artiq/gateware/wrpll/filters.py Normal file
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helper_xn1 = 0
helper_xn2 = 0
helper_yn0 = 0
helper_yn1 = 0
helper_yn2 = 0
previous_helper_tag = 0
main_xn1 = 0
main_xn2 = 0
main_yn0 = 0
main_yn1 = 0
main_yn2 = 0
def helper(helper_tag):
global helper_xn1, helper_xn2, helper_yn0, \
helper_yn1, helper_yn2, previous_helper_tag
helper_xn0 = helper_tag - previous_helper_tag - 32768
helper_yr = 4294967296
helper_yn2 = helper_yn1
helper_yn1 = helper_yn0
helper_yn0 = (
((284885689*((217319150*helper_xn0 >> 44) +
(-17591968725107*helper_xn1 >> 44))) >> 44) +
(-35184372088832*helper_yn1 >> 44) -
(17592186044416*helper_yn2 >> 44))
helper_xn2 = helper_xn1
helper_xn1 = helper_xn0
previous_helper_tag = helper_tag
helper_yn0 = min(helper_yn0, helper_yr)
helper_yn0 = max(helper_yn0, 0 - helper_yr)
return helper_yn0
def main(main_xn0):
global main_xn1, main_xn2, main_yn0, main_yn1, main_yn2
main_yr = 4294967296
main_yn2 = main_yn1
main_yn1 = main_yn0
main_yn0 = (
((133450380908*(((35184372088832*main_xn0) >> 44) +
((17592186044417*main_xn1) >> 44))) >> 44) +
((29455872930889*main_yn1) >> 44) -
((12673794781453*main_yn2) >> 44))
main_xn2 = main_xn1
main_xn1 = main_xn0
main_yn0 = min(main_yn0, main_yr)
main_yn0 = max(main_yn0, 0 - main_yr)
return main_yn0

265
artiq/gateware/wrpll/si549.py Normal file
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from migen import *
from migen.genlib.fsm import *
from migen.genlib.cdc import MultiReg, PulseSynchronizer, BlindTransfer
from misoc.interconnect.csr import *
class I2CClockGen(Module):
def __init__(self, width):
self.load = Signal(width)
self.clk2x = Signal()
cnt = Signal.like(self.load)
self.comb += [
self.clk2x.eq(cnt == 0),
]
self.sync += [
If(self.clk2x,
cnt.eq(self.load),
).Else(
cnt.eq(cnt - 1),
)
]
class I2CMasterMachine(Module):
def __init__(self, clock_width):
self.scl = Signal(reset=1)
self.sda_o = Signal(reset=1)
self.sda_i = Signal()
self.submodules.cg = CEInserter()(I2CClockGen(clock_width))
self.idle = Signal()
self.start = Signal()
self.stop = Signal()
self.write = Signal()
self.read = Signal()
self.ack = Signal()
self.data = Signal(8)
###
busy = Signal()
bits = Signal(4)
fsm = CEInserter()(FSM("IDLE"))
self.submodules += fsm
fsm.act("IDLE",
If(self.start,
NextState("START0"),
).Elif(self.stop & self.start,
NextState("RESTART0"),
).Elif(self.stop,
NextState("STOP0"),
).Elif(self.write,
NextValue(bits, 8),
NextState("WRITE0"),
).Elif(self.read,
NextValue(bits, 8),
NextState("READ0"),
)
)
fsm.act("START0",
NextValue(self.scl, 1),
NextState("START1"))
fsm.act("START1",
NextValue(self.sda_o, 0),
NextState("IDLE"))
fsm.act("RESTART0",
NextValue(self.scl, 0),
NextState("RESTART1"))
fsm.act("RESTART1",
NextValue(self.sda_o, 1),
NextState("START0"))
fsm.act("STOP0",
NextValue(self.scl, 0),
NextState("STOP1"))
fsm.act("STOP1",
NextValue(self.scl, 1),
NextValue(self.sda_o, 0),
NextState("STOP2"))
fsm.act("STOP2",
NextValue(self.sda_o, 1),
NextState("IDLE"))
fsm.act("WRITE0",
NextValue(self.scl, 0),
If(bits == 0,
NextValue(self.sda_o, 1),
NextState("READACK0"),
).Else(
NextValue(self.sda_o, self.data[7]),
NextState("WRITE1"),
)
)
fsm.act("WRITE1",
NextValue(self.scl, 1),
NextValue(self.data[1:], self.data[:-1]),
NextValue(bits, bits - 1),
NextState("WRITE0"),
)
fsm.act("READACK0",
NextValue(self.scl, 1),
NextState("READACK1"),
)
fsm.act("READACK1",
NextValue(self.ack, ~self.sda_i),
NextState("IDLE")
)
fsm.act("READ0",
NextValue(self.scl, 0),
NextState("READ1"),
)
fsm.act("READ1",
NextValue(self.data[0], self.sda_i),
NextValue(self.scl, 0),
If(bits == 0,
NextValue(self.sda_o, ~self.ack),
NextState("WRITEACK0"),
).Else(
NextValue(self.sda_o, 1),
NextState("READ2"),
)
)
fsm.act("READ2",
NextValue(self.scl, 1),
NextValue(self.data[:-1], self.data[1:]),
NextValue(bits, bits - 1),
NextState("READ1"),
)
fsm.act("WRITEACK0",
NextValue(self.scl, 1),
NextState("IDLE"),
)
run = Signal()
self.comb += [
run.eq(self.start | self.stop | self.write | self.read),
self.idle.eq(~run & fsm.ongoing("IDLE")),
self.cg.ce.eq(~self.idle),
fsm.ce.eq(run | self.cg.clk2x),
]
class ADPLLProgrammer(Module):
def __init__(self):
self.i2c_divider = Signal(16)
self.i2c_address = Signal(7)
self.adpll = Signal(24)
self.stb = Signal()
self.busy = Signal()
self.nack = Signal()
self.scl = Signal()
self.sda_i = Signal()
self.sda_o = Signal()
self.scl.attr.add("no_retiming")
self.sda_o.attr.add("no_retiming")
# # #
master = I2CMasterMachine(16)
self.submodules += master
self.comb += [
master.cg.load.eq(self.i2c_divider.storage),
self.scl.eq(master.scl),
master.sda_i.eq(self.sda_i),
self.sda_o.eq(master.sda_o)
]
class Si549(Module, AutoCSR):
def __init__(self, pads):
self.gpio_enable = CSRStorage(reset=1)
self.gpio_in = CSRStatus(2)
self.gpio_out = CSRStorage(2)
self.gpio_oe = CSRStorage(2)
self.i2c_divider = CSRStorage(16)
self.i2c_address = CSRStorage(7)
self.errors = CSR(2)
# in helper clock domain
self.adpll = Signal(24)
self.adpll_stb = Signal()
# # #
programmer = ClockDomainsRenamer("helper")(ADPLLProgrammer())
self.submodules += programmer
self.i2c_divider.storage.attr.add("no_retiming")
self.i2c_address.storage.attr.add("no_retiming")
self.specials += [
MultiReg(self.i2c_divider.storage, programmer.i2c_divider, "helper"),
MultiReg(self.i2c_address.storage, programmer.i2c_address, "helper")
]
self.comb += [
programmer.adpll.eq(self.adpll),
programmer.adpll_stb.eq(self.adpll_stb)
]
self.gpio_enable.storage.attr.add("no_retiming")
self.gpio_out.storage.attr.add("no_retiming")
self.gpio_oe.storage.attr.add("no_retiming")
# SCL GPIO and mux
ts_scl = TSTriple(1)
self.specials += ts_scl.get_tristate(pads.scl)
status = Signal()
self.comb += self.gpio_in.status[0].eq(status)
self.specials += MultiReg(ts_scl.i, status)
self.comb += [
If(self.gpio_enable.storage,
ts_scl.o.eq(self.gpio_out.storage[0]),
ts_scl.oe.eq(self.gpio_oe.storage[0])
).Else(
ts_scl.o.eq(programmer.scl),
ts_scl.oe.eq(1)
)
]
# SDA GPIO and mux
ts_sda = TSTriple(1)
self.specials += ts_sda.get_tristate(pads.sda)
status = Signal()
self.comb += self.gpio_in.status[1].eq(status)
self.specials += MultiReg(ts_sda.i, status)
self.comb += [
If(self.gpio_enable.storage,
ts_sda.o.eq(self.gpio_out.storage[1]),
ts_sda.oe.eq(self.gpio_oe.storage[1])
).Else(
ts_sda.o.eq(0),
ts_sda.oe.eq(~programmer.sda_o)
)
]
self.specials += MultiReg(ts_sda.i, programmer.sda_i, "helper")
# Error reporting
collision_cdc = BlindTransfer("helper", "sys")
self.submodules += collision_cdc
self.comb += collision_cdc.i.eq(programmer.stb & programmer.busy)
nack_cdc = PulseSynchronizer("helper", "sys")
self.submodules += nack_cdc
self.comb += nack_cdc.i.eq(programmer.nack)
for n, trig in enumerate([collision_cdc.o, nack_cdc.o]):
self.sync += [
If(self.errors.re & self.errors.r[n], self.errors.w[n].eq(0)),
If(trig, self.errors.w[n].eq(1))
]

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artiq/gateware/wrpll/thls.py Normal file
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import inspect
import ast
from copy import copy
import operator
from functools import reduce
from collections import OrderedDict
from migen import *
from migen.genlib.fsm import *
class Isn:
def __init__(self, immediate=None, inputs=None, outputs=None):
if inputs is None:
inputs = []
if outputs is None:
outputs = []
self.immediate = immediate
self.inputs = inputs
self.outputs = outputs
def __repr__(self):
r = "<"
r += self.__class__.__name__
if self.immediate is not None:
r += " (" + str(self.immediate) + ")"
for inp in self.inputs:
r += " r" + str(inp)
if self.outputs:
r += " ->"
for outp in self.outputs:
r += " r" + str(outp)
r += ">"
return r
class NopIsn(Isn):
opcode = 0
class AddIsn(Isn):
opcode = 1
class SubIsn(Isn):
opcode = 2
class MulShiftIsn(Isn):
opcode = 3
# opcode = 4: MulShift with alternate shift
class MinIsn(Isn):
opcode = 5
class MaxIsn(Isn):
opcode = 6
class CopyIsn(Isn):
opcode = 7
class InputIsn(Isn):
opcode = 8
class OutputIsn(Isn):
opcode = 9
class EndIsn(Isn):
opcode = 10
class ASTCompiler:
def __init__(self):
self.program = []
self.data = []
self.next_ssa_reg = -1
self.constants = dict()
self.names = dict()
self.globals = OrderedDict()
def get_ssa_reg(self):
r = self.next_ssa_reg
self.next_ssa_reg -= 1
return r
def add_global(self, name):
if name not in self.globals:
r = len(self.data)
self.data.append(0)
self.names[name] = r
self.globals[name] = r
def input(self, name):
target = self.get_ssa_reg()
self.program.append(InputIsn(outputs=[target]))
self.names[name] = target
def emit(self, node):
if isinstance(node, ast.BinOp):
if isinstance(node.op, ast.RShift):
if not isinstance(node.left, ast.BinOp) or not isinstance(node.left.op, ast.Mult):
raise NotImplementedError
if not isinstance(node.right, ast.Num):
raise NotImplementedError
left = self.emit(node.left.left)
right = self.emit(node.left.right)
cons = lambda **kwargs: MulShiftIsn(immediate=node.right.n, **kwargs)
else:
left = self.emit(node.left)
right = self.emit(node.right)
if isinstance(node.op, ast.Add):
cons = AddIsn
elif isinstance(node.op, ast.Sub):
cons = SubIsn
elif isinstance(node.op, ast.Mult):
cons = lambda **kwargs: MulShiftIsn(immediate=0, **kwargs)
else:
raise NotImplementedError
output = self.get_ssa_reg()
self.program.append(cons(inputs=[left, right], outputs=[output]))
return output
elif isinstance(node, ast.Call):
if not isinstance(node.func, ast.Name):
raise NotImplementedError
funcname = node.func.id
if node.keywords:
raise NotImplementedError
inputs = [self.emit(x) for x in node.args]
if funcname == "min":
cons = MinIsn
elif funcname == "max":
cons = MaxIsn
else:
raise NotImplementedError
output = self.get_ssa_reg()
self.program.append(cons(inputs=inputs, outputs=[output]))
return output
elif isinstance(node, (ast.Num, ast.UnaryOp)):
if isinstance(node, ast.UnaryOp):
if not isinstance(node.operand, ast.Num):
raise NotImplementedError
if isinstance(node.op, ast.UAdd):
transform = lambda x: x
elif isinstance(node.op, ast.USub):
transform = operator.neg
elif isinstance(node.op, ast.Invert):
transform = operator.invert
else:
raise NotImplementedError
node = node.operand
else:
transform = lambda x: x
n = transform(node.n)
if n in self.constants:
return self.constants[n]
else:
r = len(self.data)
self.data.append(n)
self.constants[n] = r
return r
elif isinstance(node, ast.Name):
return self.names[node.id]
elif isinstance(node, ast.Assign):
output = self.emit(node.value)
for target in node.targets:
assert isinstance(target, ast.Name)
self.names[target.id] = output
elif isinstance(node, ast.Return):
value = self.emit(node.value)
self.program.append(OutputIsn(inputs=[value]))
elif isinstance(node, ast.Global):
pass
else:
raise NotImplementedError
class Processor:
def __init__(self, data_width=32, multiplier_stages=2):
self.data_width = data_width
self.multiplier_stages = multiplier_stages
self.multiplier_shifts = []
self.program_rom_size = None
self.data_ram_size = None
self.opcode_bits = 4
self.reg_bits = None
def get_instruction_latency(self, isn):
return {
AddIsn: 2,
SubIsn: 2,
MulShiftIsn: 1 + self.multiplier_stages,
MinIsn: 2,
MaxIsn: 2,
CopyIsn: 1,
InputIsn: 1
}[isn.__class__]
def encode_instruction(self, isn, exit):
opcode = isn.opcode
if isn.immediate is not None and not isinstance(isn, MulShiftIsn):
r0 = isn.immediate
if len(isn.inputs) >= 1:
r1 = isn.inputs[0]
else:
r1 = 0
else:
if len(isn.inputs) >= 1:
r0 = isn.inputs[0]
else:
r0 = 0
if len(isn.inputs) >= 2:
r1 = isn.inputs[1]
else:
r1 = 0
r = 0
for value, bits in ((exit, self.reg_bits), (r1, self.reg_bits), (r0, self.reg_bits), (opcode, self.opcode_bits)):
r <<= bits
r |= value
return r
def instruction_bits(self):
return 3*self.reg_bits + self.opcode_bits
def implement(self, program, data):
return ProcessorImpl(self, program, data)
class Scheduler:
def __init__(self, processor, reserved_data, program):
self.processor = processor
self.reserved_data = reserved_data
self.used_registers = set(range(self.reserved_data))
self.exits = dict()
self.program = program
self.remaining = copy(program)
self.output = []
def allocate_register(self):
r = min(set(range(max(self.used_registers) + 2)) - self.used_registers)
self.used_registers.add(r)
return r
def free_register(self, r):
assert r >= self.reserved_data
self.used_registers.discard(r)
def find_inputs(self, cycle, isn):
mapped_inputs = []
for inp in isn.inputs:
if inp >= 0:
mapped_inputs.append(inp)
else:
found = False
for i in range(cycle):
if i in self.exits:
r, rm = self.exits[i]
if r == inp:
mapped_inputs.append(rm)
found = True
break
if not found:
return None
return mapped_inputs
def schedule_one(self, isn):
cycle = len(self.output)
mapped_inputs = self.find_inputs(cycle, isn)
if mapped_inputs is None:
return False
if isn.outputs:
# check that exit slot is free
latency = self.processor.get_instruction_latency(isn)
exit = cycle + latency
if exit in self.exits:
return False
# avoid RAW hazard with global writeback
for output in isn.outputs:
if output >= 0:
for risn in self.remaining:
for inp in risn.inputs:
if inp == output:
return False
# Instruction can be scheduled
self.remaining.remove(isn)
for inp, minp in zip(isn.inputs, mapped_inputs):
can_free = inp < 0 and all(inp != rinp for risn in self.remaining for rinp in risn.inputs)
if can_free:
self.free_register(minp)
if isn.outputs:
assert len(isn.outputs) == 1
if isn.outputs[0] < 0:
output = self.allocate_register()
else:
output = isn.outputs[0]
self.exits[exit] = (isn.outputs[0], output)
self.output.append(isn.__class__(immediate=isn.immediate, inputs=mapped_inputs))
return True
def schedule(self):
while self.remaining:
success = False
for isn in self.remaining:
if self.schedule_one(isn):
success = True
break
if not success:
self.output.append(NopIsn())
self.output += [NopIsn()]*(max(self.exits.keys()) - len(self.output) + 1)
return self.output
class CompiledProgram:
def __init__(self, processor, program, exits, data, glbs):
self.processor = processor
self.program = program
self.exits = exits
self.data = data
self.globals = glbs
def pretty_print(self):
for cycle, isn in enumerate(self.program):
l = "{:4d} {:15}".format(cycle, str(isn))
if cycle in self.exits:
l += " -> r{}".format(self.exits[cycle])
print(l)
def dimension_processor(self):
self.processor.program_rom_size = len(self.program)
self.processor.data_ram_size = len(self.data)
self.processor.reg_bits = (self.processor.data_ram_size - 1).bit_length()
for isn in self.program:
if isinstance(isn, MulShiftIsn) and isn.immediate not in self.processor.multiplier_shifts:
self.processor.multiplier_shifts.append(isn.immediate)
def encode(self):
r = []
for i, isn in enumerate(self.program):
exit = self.exits.get(i, 0)
r.append(self.processor.encode_instruction(isn, exit))
return r
def compile(processor, function):
node = ast.parse(inspect.getsource(function))
assert isinstance(node, ast.Module)
assert len(node.body) == 1
node = node.body[0]
assert isinstance(node, ast.FunctionDef)
assert len(node.args.args) == 1
arg = node.args.args[0].arg
body = node.body
astcompiler = ASTCompiler()
for node in body:
if isinstance(node, ast.Global):
for name in node.names:
astcompiler.add_global(name)
arg_r = astcompiler.input(arg)
for node in body:
astcompiler.emit(node)
if isinstance(node, ast.Return):
break
for glbl, location in astcompiler.globals.items():
new_location = astcompiler.names[glbl]
if new_location != location:
astcompiler.program.append(CopyIsn(inputs=[new_location], outputs=[location]))
scheduler = Scheduler(processor, len(astcompiler.data), astcompiler.program)
scheduler.schedule()
program = copy(scheduler.output)
program.append(EndIsn())
max_reg = max(max(max(isn.inputs + [0]) for isn in program), max(v[1] for k, v in scheduler.exits.items()))
return CompiledProgram(
processor=processor,
program=program,
exits={k: v[1] for k, v in scheduler.exits.items()},
data=astcompiler.data + [0]*(max_reg - len(astcompiler.data) + 1),
glbs=astcompiler.globals)
class BaseUnit(Module):
def __init__(self, data_width):
self.stb_i = Signal()
self.i0 = Signal((data_width, True))
self.i1 = Signal((data_width, True))
self.stb_o = Signal()
self.o = Signal((data_width, True))
class NopUnit(BaseUnit):
pass
class OpUnit(BaseUnit):
def __init__(self, op, data_width, stages):
BaseUnit.__init__(self, data_width)
o = op(self.i0, self.i1)
stb_o = self.stb_i
for i in range(stages):
n_o = Signal(data_width)
n_stb_o = Signal()
self.sync += [
n_o.eq(o),
n_stb_o.eq(stb_o)
]
o = n_o
stb_o = n_stb_o
self.comb += [
self.o.eq(o),
self.stb_o.eq(stb_o)
]
class SelectUnit(BaseUnit):
def __init__(self, op, data_width):
BaseUnit.__init__(self, data_width)
self.sync += [
self.stb_o.eq(self.stb_i),
If(op(self.i0, self.i1),
self.o.eq(self.i0)
).Else(
self.o.eq(self.i1)
)
]
class CopyUnit(BaseUnit):
def __init__(self, data_width):
BaseUnit.__init__(self, data_width)
self.comb += [
self.stb_o.eq(self.stb_i),
self.o.eq(self.i0)
]
class InputUnit(BaseUnit):
def __init__(self, data_width, input_stb, input):
BaseUnit.__init__(self, data_width)
self.buffer = Signal(data_width)
self.comb += [
self.stb_o.eq(self.stb_i),
self.o.eq(self.buffer)
]
class OutputUnit(BaseUnit):
def __init__(self, data_width, output_stb, output):
BaseUnit.__init__(self, data_width)
self.sync += [
output_stb.eq(self.stb_i),
output.eq(self.i0)
]
class ProcessorImpl(Module):
def __init__(self, pd, program, data):
self.input_stb = Signal()
self.input = Signal((pd.data_width, True))
self.output_stb = Signal()
self.output = Signal((pd.data_width, True))
self.busy = Signal()
# # #
program_mem = Memory(pd.instruction_bits(), pd.program_rom_size, init=program)
data_mem0 = Memory(pd.data_width, pd.data_ram_size, init=data)
data_mem1 = Memory(pd.data_width, pd.data_ram_size, init=data)
self.specials += program_mem, data_mem0, data_mem1
pc = Signal(pd.instruction_bits())
pc_next = Signal.like(pc)
pc_en = Signal()
self.sync += pc.eq(pc_next)
self.comb += [
If(pc_en,
pc_next.eq(pc + 1)
).Else(
pc_next.eq(0)
)
]
program_mem_port = program_mem.get_port()
self.specials += program_mem_port
self.comb += program_mem_port.adr.eq(pc_next)
s = 0
opcode = Signal(pd.opcode_bits)
self.comb += opcode.eq(program_mem_port.dat_r[s:s+pd.opcode_bits])
s += pd.opcode_bits
r0 = Signal(pd.reg_bits)
self.comb += r0.eq(program_mem_port.dat_r[s:s+pd.reg_bits])
s += pd.reg_bits
r1 = Signal(pd.reg_bits)
self.comb += r1.eq(program_mem_port.dat_r[s:s+pd.reg_bits])
s += pd.reg_bits
exit = Signal(pd.reg_bits)
self.comb += exit.eq(program_mem_port.dat_r[s:s+pd.reg_bits])
data_read_port0 = data_mem0.get_port()
data_read_port1 = data_mem1.get_port()
self.specials += data_read_port0, data_read_port1
self.comb += [
data_read_port0.adr.eq(r0),
data_read_port1.adr.eq(r1)
]
data_write_port = data_mem0.get_port(write_capable=True)
data_write_port_dup = data_mem1.get_port(write_capable=True)
self.specials += data_write_port, data_write_port_dup
self.comb += [
data_write_port_dup.we.eq(data_write_port.we),
data_write_port_dup.adr.eq(data_write_port.adr),
data_write_port_dup.dat_w.eq(data_write_port.dat_w),
data_write_port.adr.eq(exit)
]
nop = NopUnit(pd.data_width)
adder = OpUnit(operator.add, pd.data_width, 1)
subtractor = OpUnit(operator.sub, pd.data_width, 1)
if pd.multiplier_shifts:
if len(pd.multiplier_shifts) != 1:
raise NotImplementedError
multiplier = OpUnit(lambda a, b: a * b >> pd.multiplier_shifts[0],
pd.data_width, pd.multiplier_stages)
else:
multiplier = NopUnit(pd.data_width)
minu = SelectUnit(operator.lt, pd.data_width)
maxu = SelectUnit(operator.gt, pd.data_width)
copier = CopyUnit(pd.data_width)
inu = InputUnit(pd.data_width, self.input_stb, self.input)
outu = OutputUnit(pd.data_width, self.output_stb, self.output)
units = [nop, adder, subtractor, multiplier, minu, maxu, copier, inu, outu]
self.submodules += units
for unit in units:
self.sync += unit.stb_i.eq(0)
self.comb += [
unit.i0.eq(data_read_port0.dat_r),
unit.i1.eq(data_read_port1.dat_r),
If(unit.stb_o,
data_write_port.we.eq(1),
data_write_port.dat_w.eq(unit.o)
)
]
decode_table = [
(NopIsn.opcode, nop),
(AddIsn.opcode, adder),
(SubIsn.opcode, subtractor),
(MulShiftIsn.opcode, multiplier),
(MulShiftIsn.opcode + 1, multiplier),
(MinIsn.opcode, minu),
(MaxIsn.opcode, maxu),
(CopyIsn.opcode, copier),
(InputIsn.opcode, inu),
(OutputIsn.opcode, outu)
]
for allocated_opcode, unit in decode_table:
self.sync += If(pc_en & (opcode == allocated_opcode), unit.stb_i.eq(1))
fsm = FSM()
self.submodules += fsm
fsm.act("IDLE",
pc_en.eq(0),
NextValue(inu.buffer, self.input),
If(self.input_stb, NextState("PROCESSING"))
)
fsm.act("PROCESSING",
self.busy.eq(1),
pc_en.eq(1),
If(opcode == EndIsn.opcode,
pc_en.eq(0),
NextState("IDLE")
)
)
a = 0
b = 0
c = 0
def foo(x):
global a, b, c
c = b
b = a
a = x
return 4748*a + 259*b - 155*c
def simple_test(x):
global a
a = a + (x*4 >> 1)
return a
if __name__ == "__main__":
proc = Processor()
cp = compile(proc, simple_test)
cp.pretty_print()
cp.dimension_processor()
print(cp.encode())
proc_impl = proc.implement(cp.encode(), cp.data)
def send_values(values):
for value in values:
yield proc_impl.input.eq(value)
yield proc_impl.input_stb.eq(1)
yield
yield proc_impl.input.eq(0)
yield proc_impl.input_stb.eq(0)
yield
while (yield proc_impl.busy):
yield
@passive
def receive_values(callback):
while True:
while not (yield proc_impl.output_stb):
yield
callback((yield proc_impl.output))
yield
run_simulation(proc_impl, [send_values([42, 40, 10, 10]), receive_values(print)])