src/add/test_div.py

   1 import sys
   2 from random import randint
   3 from random import seed
   4
   5 from nmigen import Module, Signal
   6 from nmigen.compat.sim import run_simulation
   7
   8 from nmigen_div_experiment import FPDIV
   9
  10 from unit_test_single import (get_mantissa, get_exponent, get_sign, is_nan,
  11                                 is_inf, is_pos_inf, is_neg_inf,
  12                                 match, get_case, check_case, run_test)
  13
  14
  15 def testbench(dut):
  16     yield from check_case(dut, 0xbf9b1e94, 0xc038ed3a, 0xc0833e42)
  17     yield from check_case(dut, 0x40000000, 0x3F800000, 0x40000000)
  18     yield from check_case(dut, 0x3F800000, 0x40000000, 0x3F000000)
  19     yield from check_case(dut, 0x3F800000, 0x40400000, 0x3EAAAAAB)
  20     yield from check_case(dut, 0x40400000, 0x41F80000, 0x3DC6318C)
  21     yield from check_case(dut, 0x41F9EB4D, 0x429A4C70, 0x3ECF52B2)
  22     yield from check_case(dut, 0x7F7FFFFE, 0x70033181, 0x4EF9C4C8)
  23     yield from check_case(dut, 0x7F7FFFFE, 0x70000001, 0x4EFFFFFC)
  24     yield from check_case(dut, 0x7F7FFCFF, 0x70200201, 0x4ECCC7D5)
  25     yield from check_case(dut, 0x70200201, 0x7F7FFCFF, 0x302003E2)
  26
  27     count = 0
  28
  29     #regression tests
  30     stimulus_a = [0xbf9b1e94, 0x34082401, 0x5e8ef81, 0x5c75da81, 0x2b017]
  31     stimulus_b = [0xc038ed3a, 0xb328cd45, 0x114f3db, 0x2f642a39, 0xff3807ab]
  32     yield from run_test(dut, stimulus_a, stimulus_b)
  33     count += len(stimulus_a)
  34     print (count, "vectors passed")
  35
  36     #corner cases
  37     from itertools import permutations
  38     stimulus_a = [i[0] for i in permutations([0x80000000, 0x00000000, 0x7f800000, 0xff800000, 0x7fc00000, 0xffc00000], 2)]
  39     stimulus_b = [i[1] for i in permutations([0x80000000, 0x00000000, 0x7f800000, 0xff800000, 0x7fc00000, 0xffc00000], 2)]
  40     yield from run_test(dut, stimulus_a, stimulus_b)
  41     count += len(stimulus_a)
  42     print (count, "vectors passed")
  43
  44     #edge cases
  45     stimulus_a = [0x80000000 for i in xrange(1000)]
  46     stimulus_b = [randint(0, 1<<32) for i in xrange(1000)]
  47     yield from run_test(dut, stimulus_a, stimulus_b)
  48     count += len(stimulus_a)
  49     print (count, "vectors passed")
  50
  51     stimulus_a = [0x00000000 for i in xrange(1000)]
  52     stimulus_b = [randint(0, 1<<32) for i in xrange(1000)]
  53     yield from run_test(dut, stimulus_a, stimulus_b)
  54     count += len(stimulus_a)
  55     print (count, "vectors passed")
  56
  57     stimulus_b = [0x80000000 for i in xrange(1000)]
  58     stimulus_a = [randint(0, 1<<32) for i in xrange(1000)]
  59     yield from run_test(dut, stimulus_a, stimulus_b)
  60     count += len(stimulus_a)
  61     print (count, "vectors passed")
  62
  63     stimulus_b = [0x00000000 for i in xrange(1000)]
  64     stimulus_a = [randint(0, 1<<32) for i in xrange(1000)]
  65     yield from run_test(dut, stimulus_a, stimulus_b)
  66     count += len(stimulus_a)
  67     print (count, "vectors passed")
  68
  69     stimulus_a = [0x7F800000 for i in xrange(1000)]
  70     stimulus_b = [randint(0, 1<<32) for i in xrange(1000)]
  71     yield from run_test(dut, stimulus_a, stimulus_b)
  72     count += len(stimulus_a)
  73     print (count, "vectors passed")
  74
  75     stimulus_a = [0xFF800000 for i in xrange(1000)]
  76     stimulus_b = [randint(0, 1<<32) for i in xrange(1000)]
  77     yield from run_test(dut, stimulus_a, stimulus_b)
  78     count += len(stimulus_a)
  79     print (count, "vectors passed")
  80
  81     stimulus_b = [0x7F800000 for i in xrange(1000)]
  82     stimulus_a = [randint(0, 1<<32) for i in xrange(1000)]
  83     yield from run_test(dut, stimulus_a, stimulus_b)
  84     count += len(stimulus_a)
  85     print (count, "vectors passed")
  86
  87     stimulus_b = [0xFF800000 for i in xrange(1000)]
  88     stimulus_a = [randint(0, 1<<32) for i in xrange(1000)]
  89     yield from run_test(dut, stimulus_a, stimulus_b)
  90     count += len(stimulus_a)
  91     print (count, "vectors passed")
  92
  93     stimulus_a = [0x7FC00000 for i in xrange(1000)]
  94     stimulus_b = [randint(0, 1<<32) for i in xrange(1000)]
  95     yield from run_test(dut, stimulus_a, stimulus_b)
  96     count += len(stimulus_a)
  97     print (count, "vectors passed")
  98
  99     stimulus_a = [0xFFC00000 for i in xrange(1000)]
 100     stimulus_b = [randint(0, 1<<32) for i in xrange(1000)]
 101     yield from run_test(dut, stimulus_a, stimulus_b)
 102     count += len(stimulus_a)
 103     print (count, "vectors passed")
 104
 105     stimulus_b = [0x7FC00000 for i in xrange(1000)]
 106     stimulus_a = [randint(0, 1<<32) for i in xrange(1000)]
 107     yield from run_test(dut, stimulus_a, stimulus_b)
 108     count += len(stimulus_a)
 109     print (count, "vectors passed")
 110
 111     stimulus_b = [0xFFC00000 for i in xrange(1000)]
 112     stimulus_a = [randint(0, 1<<32) for i in xrange(1000)]
 113     yield from run_test(dut, stimulus_a, stimulus_b)
 114     count += len(stimulus_a)
 115     print (count, "vectors passed")
 116
 117     #seed(0)
 118     for i in xrange(100000):
 119         stimulus_a = [randint(0, 1<<32) for i in xrange(1000)]
 120         stimulus_b = [randint(0, 1<<32) for i in xrange(1000)]
 121         yield from run_test(dut, stimulus_a, stimulus_b)
 122         count += 1000
 123         print (count, "random vectors passed")
 124
 125
 126 if __name__ == '__main__':
 127     dut = FPDIV(width=32)
 128     run_simulation(dut, testbench(dut), vcd_name="test_div.vcd")
 129