forked from M-Labs/artiq
wrpll/thls: simple simulation demo
This commit is contained in:
parent
831b3514d3
commit
623446f82c
|
@ -1,6 +1,10 @@
|
|||
import inspect
|
||||
import ast
|
||||
from copy import copy
|
||||
import operator
|
||||
from functools import reduce
|
||||
|
||||
from migen import *
|
||||
|
||||
|
||||
class Isn:
|
||||
|
@ -40,17 +44,14 @@ class SubIsn(Isn):
|
|||
class MulIsn(Isn):
|
||||
opcode = 3
|
||||
|
||||
class ShiftIsn(Isn):
|
||||
class CopyIsn(Isn):
|
||||
opcode = 4
|
||||
|
||||
class CopyIsn(Isn):
|
||||
class InputIsn(Isn):
|
||||
opcode = 5
|
||||
|
||||
class InputIsn(Isn):
|
||||
opcode = 6
|
||||
|
||||
class OutputIsn(Isn):
|
||||
opcode = 7
|
||||
opcode = 6
|
||||
|
||||
|
||||
class ASTCompiler:
|
||||
|
@ -132,7 +133,6 @@ class Processor:
|
|||
AddIsn: 2,
|
||||
SubIsn: 2,
|
||||
MulIsn: 1 + self.multiplier_stages,
|
||||
ShiftIsn: 2,
|
||||
CopyIsn: 1,
|
||||
InputIsn: 1
|
||||
}[isn.__class__]
|
||||
|
@ -160,6 +160,12 @@ class Processor:
|
|||
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):
|
||||
|
@ -292,14 +298,167 @@ def compile(processor, function):
|
|||
scheduler = Scheduler(processor, len(astcompiler.data), astcompiler.program)
|
||||
scheduler.schedule()
|
||||
|
||||
max_reg = max(max(max(isn.inputs + [0]) for isn in scheduler.output), max(v[1] for k, v in scheduler.exits.items()))
|
||||
|
||||
return CompiledProgram(
|
||||
processor=processor,
|
||||
program=scheduler.output,
|
||||
exits={k: v[1] for k,v in scheduler.exits.items()},
|
||||
data=astcompiler.data,
|
||||
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)
|
||||
self.i1 = Signal(data_width)
|
||||
self.stb_o = Signal()
|
||||
self.o = Signal(data_width)
|
||||
|
||||
|
||||
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 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)
|
||||
|
||||
# TODO
|
||||
self.comb += [
|
||||
self.stb_o.eq(self.stb_i),
|
||||
self.o.eq(42)
|
||||
]
|
||||
|
||||
|
||||
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)
|
||||
|
||||
self.output_stb = Signal()
|
||||
self.output = Signal(pd.data_width)
|
||||
|
||||
# # #
|
||||
|
||||
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)
|
||||
|
||||
# TODO
|
||||
self.comb += pc_en.eq(1)
|
||||
|
||||
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)
|
||||
multiplier = OpUnit(operator.mul, pd.data_width, pd.multiplier_stages)
|
||||
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, copier, inu, outu]
|
||||
self.submodules += units
|
||||
|
||||
for n, unit in enumerate(units):
|
||||
self.sync += unit.stb_i.eq(opcode == n)
|
||||
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)
|
||||
)
|
||||
]
|
||||
|
||||
|
||||
a = 0
|
||||
b = 0
|
||||
c = 0
|
||||
|
@ -312,7 +471,22 @@ def foo(x):
|
|||
return 4748*a + 259*b - 155*c
|
||||
|
||||
|
||||
cp = compile(Processor(), foo)
|
||||
cp.pretty_print()
|
||||
cp.dimension_memories()
|
||||
print(cp.encode())
|
||||
def simple_test(x):
|
||||
a = 5 + 3
|
||||
return a*4
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
proc = Processor()
|
||||
cp = compile(proc, simple_test)
|
||||
cp.pretty_print()
|
||||
cp.dimension_memories()
|
||||
print(cp.encode())
|
||||
proc_impl = proc.implement(cp.encode(), cp.data)
|
||||
|
||||
def wait_result():
|
||||
while not (yield proc_impl.output_stb):
|
||||
yield
|
||||
result = yield proc_impl.output
|
||||
print(result)
|
||||
run_simulation(proc_impl, [wait_result()], vcd_name="test.vcd")
|
||||
|
|
Loading…
Reference in New Issue