src/soc/decoder/isa/test_caller.py

   1 from nmigen import Module, Signal
   2 from nmigen.back.pysim import Simulator, Delay
   3 from nmigen.test.utils import FHDLTestCase
   4 import unittest
   5 from soc.decoder.isa.caller import ISACaller
   6 from soc.decoder.power_decoder import (create_pdecode)
   7 from soc.decoder.power_decoder2 import (PowerDecode2)
   8 from soc.simulator.program import Program
   9 from soc.decoder.isa.caller import ISACaller, inject
  10 from soc.decoder.selectable_int import SelectableInt
  11 from soc.decoder.orderedset import OrderedSet
  12 from soc.decoder.isa.all import ISA
  13
  14
  15 class Register:
  16     def __init__(self, num):
  17         self.num = num
  18
  19
  20 class DecoderTestCase(FHDLTestCase):
  21
  22     def run_tst(self, generator, initial_regs):
  23         m = Module()
  24         comb = m.d.comb
  25         instruction = Signal(32)
  26
  27         pdecode = create_pdecode()
  28
  29         m.submodules.pdecode2 = pdecode2 = PowerDecode2(pdecode)
  30         simulator = ISA(pdecode2, initial_regs)
  31         comb += pdecode2.dec.raw_opcode_in.eq(instruction)
  32         sim = Simulator(m)
  33         gen = generator.generate_instructions()
  34
  35         def process():
  36             instructions = list(zip(gen, generator.assembly.splitlines()))
  37
  38             index = simulator.pc.CIA.value//4
  39             while index < len(instructions):
  40                 ins, code = instructions[index]
  41
  42                 print("0x{:X}".format(ins & 0xffffffff))
  43                 print(code)
  44
  45                 # ask the decoder to decode this binary data (endian'd)
  46                 yield pdecode2.dec.bigendian.eq(0)  # little / big?
  47                 yield instruction.eq(ins)          # raw binary instr.
  48                 yield Delay(1e-6)
  49                 opname = code.split(' ')[0]
  50                 yield from simulator.call(opname)
  51                 index = simulator.pc.CIA.value//4
  52
  53         sim.add_process(process)
  54         with sim.write_vcd("simulator.vcd", "simulator.gtkw",
  55                            traces=[]):
  56             sim.run()
  57         return simulator
  58
  59     def test_add(self):
  60         lst = ["add 1, 3, 2"]
  61         initial_regs = [0] * 32
  62         initial_regs[3] = 0x1234
  63         initial_regs[2] = 0x4321
  64         with Program(lst) as program:
  65             sim = self.run_tst_program(program, initial_regs)
  66             self.assertEqual(sim.gpr(1), SelectableInt(0x5555, 64))
  67
  68     def test_addi(self):
  69         lst = ["addi 3, 0, 0x1234",
  70                "addi 2, 0, 0x4321",
  71                "add  1, 3, 2"]
  72         with Program(lst) as program:
  73             sim = self.run_tst_program(program)
  74             print(sim.gpr(1))
  75             self.assertEqual(sim.gpr(1), SelectableInt(0x5555, 64))
  76
  77     def test_load_store(self):
  78         lst = ["addi 1, 0, 0x0010",
  79                "addi 2, 0, 0x1234",
  80                "stw 2, 0(1)",
  81                "lwz 3, 0(1)"]
  82         with Program(lst) as program:
  83             sim = self.run_tst_program(program)
  84             print(sim.gpr(1))
  85             self.assertEqual(sim.gpr(3), SelectableInt(0x1234, 64))
  86
  87     def test_addpcis(self):
  88         lst = ["addpcis 1, 0x1",
  89                "addpcis 2, 0x1",
  90                "addpcis 3, 0x1"]
  91         with Program(lst) as program:
  92             sim = self.run_tst_program(program)
  93             self.assertEqual(sim.gpr(1), SelectableInt(0x10004, 64))
  94             self.assertEqual(sim.gpr(2), SelectableInt(0x10008, 64))
  95             self.assertEqual(sim.gpr(3), SelectableInt(0x1000c, 64))
  96
  97     def test_branch(self):
  98         lst = ["ba 0xc",             # branch to line 4
  99                "addi 1, 0, 0x1234",  # Should never execute
 100                "ba 0x1000",          # exit the program
 101                "addi 2, 0, 0x1234",  # line 4
 102                "ba 0x8"]             # branch to line 3
 103         with Program(lst) as program:
 104             sim = self.run_tst_program(program)
 105             self.assertEqual(sim.pc.CIA, SelectableInt(0x1000, 64))
 106             self.assertEqual(sim.gpr(1), SelectableInt(0x0, 64))
 107             self.assertEqual(sim.gpr(2), SelectableInt(0x1234, 64))
 108
 109     def test_branch_link(self):
 110         lst = ["bl 0xc",
 111                "addi 2, 1, 0x1234",
 112                "ba 0x1000",
 113                "addi 1, 0, 0x1234",
 114                "bclr 20, 0, 0"]
 115         with Program(lst) as program:
 116             sim = self.run_tst_program(program)
 117             self.assertEqual(sim.spr['LR'], SelectableInt(0x4, 64))
 118
 119     def test_branch_ctr(self):
 120         lst = ["addi 1, 0, 0x10",    # target of jump
 121                "mtspr 9, 1",         # mtctr 1
 122                "bcctr 20, 0, 0",     # bctr
 123                "addi 2, 0, 0x1",     # should never execute
 124                "addi 1, 0, 0x1234"]  # target of ctr
 125         with Program(lst) as program:
 126             sim = self.run_tst_program(program)
 127             self.assertEqual(sim.spr['CTR'], SelectableInt(0x10, 64))
 128             self.assertEqual(sim.gpr(1), SelectableInt(0x1234, 64))
 129             self.assertEqual(sim.gpr(2), SelectableInt(0, 64))
 130
 131     def test_branch_cond(self):
 132         for i in [0, 10]:
 133             lst = [f"addi 1, 0, {i}",  # set r1 to i
 134                 "cmpi cr0, 1, 1, 10",  # compare r1 with 10 and store to cr0
 135                 "bc 12, 2, 0x8",       # beq 0x8 -
 136                                        # branch if r1 equals 10 to the nop below
 137                 "addi 2, 0, 0x1234",   # if r1 == 10 this shouldn't execute
 138                 "or 0, 0, 0"]          # branch target
 139             with Program(lst) as program:
 140                 sim = self.run_tst_program(program)
 141                 if i == 10:
 142                     self.assertEqual(sim.gpr(2), SelectableInt(0, 64))
 143                 else:
 144                     self.assertEqual(sim.gpr(2), SelectableInt(0x1234, 64))
 145
 146     def test_branch_loop(self):
 147         lst = ["addi 1, 0, 0",
 148                "addi 1, 0, 0",
 149                "addi 1, 1, 1",
 150                "add  2, 2, 1",
 151                "cmpi cr0, 1, 1, 10",
 152                "bc 12, 0, -0xc"]
 153         with Program(lst) as program:
 154             sim = self.run_tst_program(program)
 155             # Verified with qemu
 156             self.assertEqual(sim.gpr(2), SelectableInt(0x37, 64))
 157
 158     def test_branch_loop_ctr(self):
 159         lst = ["addi 1, 0, 0",
 160                "addi 2, 0, 7",
 161                "mtspr 9, 2",    # set ctr to 7
 162                "addi 1, 1, 5",
 163                "bc 16, 0, -0x4"]  # bdnz to the addi above
 164         with Program(lst) as program:
 165             sim = self.run_tst_program(program)
 166             # Verified with qemu
 167             self.assertEqual(sim.gpr(1), SelectableInt(0x23, 64))
 168
 169
 170
 171     def test_add_compare(self):
 172         lst = ["addis 1, 0, 0xffff",
 173                "addis 2, 0, 0xffff",
 174                "add. 1, 1, 2",
 175                "mfcr 3"]
 176         with Program(lst) as program:
 177             sim = self.run_tst_program(program)
 178             # Verified with QEMU
 179             self.assertEqual(sim.gpr(3), SelectableInt(0x80000000, 64))
 180
 181     def test_cmp(self):
 182         lst = ["addis 1, 0, 0xffff",
 183                "addis 2, 0, 0xffff",
 184                "cmp cr0, 0, 1, 2",
 185                "mfcr 3"]
 186         with Program(lst) as program:
 187             sim = self.run_tst_program(program)
 188             self.assertEqual(sim.gpr(3), SelectableInt(0x20000000, 64))
 189
 190     def test_slw(self):
 191         lst = ["slw 1, 3, 2"]
 192         initial_regs = [0] * 32
 193         initial_regs[3] = 0xdeadbeefcafebabe
 194         initial_regs[2] = 5
 195         with Program(lst) as program:
 196             sim = self.run_tst_program(program, initial_regs)
 197             self.assertEqual(sim.gpr(1), SelectableInt(0x5fd757c0, 32))
 198
 199     def test_srw(self):
 200         lst = ["srw 1, 3, 2"]
 201         initial_regs = [0] * 32
 202         initial_regs[3] = 0xdeadbeefcafebabe
 203         initial_regs[2] = 5
 204         with Program(lst) as program:
 205             sim = self.run_tst_program(program, initial_regs)
 206             self.assertEqual(sim.gpr(1), SelectableInt(0x657f5d5, 32))
 207
 208     def test_rlwinm(self):
 209         lst = ["rlwinm 3, 1, 5, 20, 6"]
 210         initial_regs = [0] * 32
 211         initial_regs[1] = -1
 212         with Program(lst) as program:
 213             sim = self.run_tst_program(program, initial_regs)
 214             self.assertEqual(sim.gpr(3), SelectableInt(0xfe000fff, 64))
 215
 216     def test_mtcrf(self):
 217         for i in range(4):
 218             # 0x76540000 gives expected (3+4) (2+4) (1+4) (0+4) for
 219             #     i=0, 1, 2, 3
 220             # The positions of the CR fields have been verified using
 221             # QEMU and 'cmp crx, a, b' instructions
 222             lst = ["addis 1, 0, 0x7654",
 223                    "mtcrf %d, 1" % (1 << (7-i)),
 224                    ]
 225             with Program(lst) as program:
 226                 sim = self.run_tst_program(program)
 227             print("cr", sim.cr)
 228             expected = (7-i)
 229             # check CR itself
 230             self.assertEqual(sim.cr, SelectableInt(expected << ((7-i)*4), 32))
 231             # check CR[0]/1/2/3 as well
 232             print("cr%d", sim.crl[i])
 233             self.assertTrue(SelectableInt(expected, 4) == sim.crl[i])
 234
 235     def run_tst_program(self, prog, initial_regs=[0] * 32):
 236         simulator = self.run_tst(prog, initial_regs)
 237         simulator.gpr.dump()
 238         return simulator
 239
 240
 241 if __name__ == "__main__":
 242     unittest.main()