src/soc/fu/compunits/test/test_compunit.py

   1 from nmigen import Module, Signal
   2 from nmigen.back.pysim import Simulator, Delay, Settle
   3 from nmigen.test.utils import FHDLTestCase
   4 from nmigen.cli import rtlil
   5 import unittest
   6 from soc.decoder.isa.caller import ISACaller, special_sprs
   7 from soc.decoder.power_decoder import (create_pdecode)
   8 from soc.decoder.power_decoder2 import (PowerDecode2)
   9 from soc.decoder.power_enums import (XER_bits, Function, InternalOp)
  10 from soc.decoder.selectable_int import SelectableInt
  11 from soc.simulator.program import Program
  12 from soc.decoder.isa.all import ISA
  13
  14 from soc.fu.alu.test.test_pipe_caller import TestCase, ALUTestCase, test_data
  15 from soc.experiment.compalu_multi import find_ok # hack
  16 import random
  17
  18 def set_cu_input(cu, idx, data):
  19     rdop = cu.get_in_name(idx)
  20     yield cu.src_i[idx].eq(data)
  21     while True:
  22         rd_rel_o = yield cu.rd.rel[idx]
  23         print ("rd_rel %d wait HI" % idx, rd_rel_o, rdop, hex(data))
  24         if rd_rel_o:
  25             break
  26         yield
  27     yield cu.rd.go[idx].eq(1)
  28     while True:
  29         yield
  30         rd_rel_o = yield cu.rd.rel[idx]
  31         if rd_rel_o:
  32             break
  33         print ("rd_rel %d wait HI" % idx, rd_rel_o)
  34         yield
  35     yield cu.rd.go[idx].eq(0)
  36     yield cu.src_i[idx].eq(0)
  37
  38
  39 def get_cu_output(cu, idx, code):
  40     wrmask = yield cu.wrmask
  41     wrop = cu.get_out_name(idx)
  42     wrok = cu.get_out(idx)
  43     fname = find_ok(wrok.fields)
  44     wrok = yield getattr(wrok, fname)
  45     print ("wr_rel mask", repr(code), idx, wrop, bin(wrmask), fname, wrok)
  46     assert wrmask & (1<<idx), \
  47             "get_cu_output '%s': mask bit %d not set\n" \
  48             "write-operand '%s' Data.ok likely not set (%s)" \
  49             % (code, idx, wrop, hex(wrok))
  50     while True:
  51         wr_relall_o = yield cu.wr.rel
  52         wr_rel_o = yield cu.wr.rel[idx]
  53         print ("wr_rel %d wait" % idx, hex(wr_relall_o), wr_rel_o)
  54         if wr_rel_o:
  55             break
  56         yield
  57     yield cu.wr.go[idx].eq(1)
  58     yield Settle()
  59     result = yield cu.dest[idx]
  60     yield
  61     yield cu.wr.go[idx].eq(0)
  62     print ("result", repr(code), idx, wrop, wrok, hex(result))
  63     return result
  64
  65
  66 def set_cu_inputs(cu, inp):
  67     for idx, data in inp.items():
  68         yield from set_cu_input(cu, idx, data)
  69
  70
  71 def set_operand(cu, dec2, sim):
  72     yield from cu.oper_i.eq_from_execute1(dec2.e)
  73     yield cu.issue_i.eq(1)
  74     yield
  75     yield cu.issue_i.eq(0)
  76     yield
  77
  78
  79 def get_cu_outputs(cu, code):
  80     res = {}
  81     for i in range(cu.n_dst):
  82         wr_rel_o = yield cu.wr.rel[i]
  83         if wr_rel_o:
  84             result = yield from get_cu_output(cu, i, code)
  85             wrop = cu.get_out_name(i)
  86             print ("output", i, wrop, hex(result))
  87             res[wrop] = result
  88     return res
  89
  90
  91 def get_inp_indexed(cu, inp):
  92     res = {}
  93     for i in range(cu.n_src):
  94         wrop = cu.get_in_name(i)
  95         if wrop in inp:
  96             res[i] = inp[wrop]
  97     return res
  98
  99 def get_cu_rd_mask(n_src, inp):
 100     mask = 0
 101     for i in range(n_src):
 102         if i in inp:
 103             mask |= (1<<i)
 104     return mask
 105
 106
 107 class TestRunner(FHDLTestCase):
 108     def __init__(self, test_data, fukls, iodef, funit):
 109         super().__init__("run_all")
 110         self.test_data = test_data
 111         self.fukls = fukls
 112         self.iodef = iodef
 113         self.funit = funit
 114
 115     def run_all(self):
 116         m = Module()
 117         comb = m.d.comb
 118         instruction = Signal(32)
 119
 120         pdecode = create_pdecode()
 121
 122         m.submodules.pdecode2 = pdecode2 = PowerDecode2(pdecode)
 123         m.submodules.cu = cu = self.fukls()
 124
 125         comb += pdecode2.dec.raw_opcode_in.eq(instruction)
 126         sim = Simulator(m)
 127
 128         sim.add_clock(1e-6)
 129
 130         def process():
 131             yield cu.issue_i.eq(0)
 132             yield
 133
 134             for test in self.test_data:
 135                 print(test.name)
 136                 program = test.program
 137                 self.subTest(test.name)
 138                 sim = ISA(pdecode2, test.regs, test.sprs, 0)
 139                 gen = program.generate_instructions()
 140                 instructions = list(zip(gen, program.assembly.splitlines()))
 141
 142                 index = sim.pc.CIA.value//4
 143                 while index < len(instructions):
 144                     ins, code = instructions[index]
 145
 146                     print("0x{:X}".format(ins & 0xffffffff))
 147                     print(code)
 148
 149                     # ask the decoder to decode this binary data (endian'd)
 150                     yield pdecode2.dec.bigendian.eq(0)  # little / big?
 151                     yield instruction.eq(ins)          # raw binary instr.
 152                     yield Settle()
 153                     fn_unit = yield pdecode2.e.fn_unit
 154                     fuval = self.funit.value
 155                     self.assertEqual(fn_unit & fuval, fuval)
 156
 157                     # set operand and get inputs
 158                     yield from set_operand(cu, pdecode2, sim)
 159                     iname = yield from self.iodef.get_cu_inputs(pdecode2, sim)
 160                     inp = get_inp_indexed(cu, iname)
 161
 162                     # reset read-operand mask
 163                     rdmask = get_cu_rd_mask(cu.n_src, inp)
 164                     yield cu.rdmaskn.eq(~rdmask)
 165
 166                     # reset write-operand mask
 167                     for idx in range(cu.n_dst):
 168                         wrok = cu.get_out(idx)
 169                         fname = find_ok(wrok.fields)
 170                         yield getattr(wrok, fname).eq(0)
 171
 172                     # first set inputs to zero
 173                     for idx in range(cu.n_src):
 174                         cu_in = cu.get_in(idx)
 175                         yield cu_in.eq(0)
 176
 177                     # set inputs into CU
 178                     rd_rel_o = yield cu.rd.rel
 179                     wr_rel_o = yield cu.wr.rel
 180                     print ("before inputs, rd_rel, wr_rel: ",
 181                             bin(rd_rel_o), bin(wr_rel_o))
 182                     yield from set_cu_inputs(cu, inp)
 183                     yield
 184                     rd_rel_o = yield cu.rd.rel
 185                     wr_rel_o = yield cu.wr.rel
 186                     wrmask = yield cu.wrmask
 187                     print ("after inputs, rd_rel, wr_rel, wrmask: ",
 188                             bin(rd_rel_o), bin(wr_rel_o), bin(wrmask))
 189
 190                     # call simulated operation
 191                     opname = code.split(' ')[0]
 192                     yield from sim.call(opname)
 193                     index = sim.pc.CIA.value//4
 194
 195                     # get all outputs (one by one, just "because")
 196                     res = yield from get_cu_outputs(cu, code)
 197
 198                     yield from self.iodef.check_cu_outputs(res, pdecode2,
 199                                                             sim, code)
 200
 201         sim.add_sync_process(process)
 202         with sim.write_vcd("simulator.vcd", "simulator.gtkw",
 203                             traces=[]):
 204             sim.run()
 205
 206