windowsでiverilog その45

#概要

windowsでiverilogやってみた。
polyphonyでcpu書いてみる。

#サンプルコード

from polyphony import testbench, module, is_worker_running, rule
from polyphony.io import Port
from polyphony.typing import uint8
from polyphony.timing import clksleep

@module
class mpu:
	def __init__(self):
		self.out = Port(uint8, 'out')
		self.append_worker(self.worker)
	def worker(self):
		rom = [
			0x8000,  #r0set  0   0
			0xd000,  #r0save  0  1
			       #loop:
			0xc000,  #r0load  0  2
			0x841a,  #r1set  26  3
			0x6100,  #r0  <  r1  4
			0x5090,  #if  pass   5
			0xc000,  #r0load  0  6
			0x8461,  #r1set  97  7
			0x0100,  #r0  +  r1  8
			0xa000,  #r0out      9
			0xc000,  #r0load  0  10
			0x8401,  #r1set  1   11
			0x0100,  #r0  +  r1  12
			0xd000,  #r0save  0  14
			0x4002,  #jp  loop   15
			0x400f, #pass:       16
		]
		ram = [0] * 8
		reg = [0] * 4
		pc = 0
		while is_worker_running():
			with rule(scheduling = 'pipeline'):
				while pc < 100:
					ins = rom[pc]
					pc = pc + 1
					op = (ins >> 14) & 0x3
					funct = (ins >> 12) & 0x3
					a = (ins >> 10) & 0x3
					b = (ins >> 8) & 0x3
					data = ins & 0xff
					addr = ins & 0xff
					if op == 0:
						if funct == 0:
							reg[a] = reg[a] + reg[b]
						elif funct == 1:
							reg[a] = reg[a] - reg[b]
						elif funct == 2:
							reg[a] = reg[a] * reg[b]
						elif funct == 3:
							reg[a] = reg[a] / reg[b]
						else:
							pc = 100
					elif op == 1:
						if funct == 0:
							pc = addr
						elif funct == 1:
							if (reg[a] == 0):
								pc = addr
						elif funct == 2:
							reg[a] = reg[a] < reg[b]
						elif funct == 3:
							reg[a] = reg[a] % reg[b]
						else:
							pc = 100
					elif op == 2:
						if funct == 0:
							reg[a] = data
						elif funct == 1:
							reg[a] = reg[b] + data
						elif funct == 2:
							self.out(reg[a])
							print(reg[a])
						elif funct == 3:
							self.out(data)
						else:
							pc = 100
					elif op == 3:
						if funct == 0:
							reg[a] = ram[addr]
						elif funct == 1:
							ram[addr] = reg[a]
						else:
							pc = 100
					else:
						pc = 100

m = mpu()

@testbench
def test(m):
	clksleep(120)
	print("ok")

test(m)

#python実行結果

97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
ok
121
122

以上。