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。