src/add/unit_test_single.py

   1 from random import randint
   2 from random import seed
   3
   4 import sys
   5 from sfpy import Float32
   6
   7 def get_mantissa(x):
   8     return 0x7fffff & x
   9
  10 def get_exponent(x):
  11     return ((x & 0x7f800000) >> 23) - 127
  12
  13 def set_exponent(x, e):
  14     return (x & ~0x7f800000) | ((e+127) << 23)
  15
  16 def get_sign(x):
  17     return ((x & 0x80000000) >> 31)
  18
  19 def is_nan(x):
  20     return get_exponent(x) == 128 and get_mantissa(x) != 0
  21
  22 def is_inf(x):
  23     return get_exponent(x) == 128 and get_mantissa(x) == 0
  24
  25 def is_pos_inf(x):
  26     return is_inf(x) and not get_sign(x)
  27
  28 def is_neg_inf(x):
  29     return is_inf(x) and get_sign(x)
  30
  31 def match(x, y):
  32     return (
  33         (is_pos_inf(x) and is_pos_inf(y)) or
  34         (is_neg_inf(x) and is_neg_inf(y)) or
  35         (is_nan(x) and is_nan(y)) or
  36         (x == y)
  37         )
  38
  39 def get_case(dut, a, b, mid):
  40     in_a, in_b = dut.rs[0]
  41     out_z = dut.res[0]
  42     yield dut.ids.in_mid.eq(mid)
  43     yield in_a.v.eq(a)
  44     yield in_a.stb.eq(1)
  45     yield
  46     yield
  47     yield
  48     yield
  49     a_ack = (yield in_a.ack)
  50     assert a_ack == 0
  51
  52     yield in_a.stb.eq(0)
  53
  54     yield in_b.v.eq(b)
  55     yield in_b.stb.eq(1)
  56     yield
  57     yield
  58     b_ack = (yield in_b.ack)
  59     assert b_ack == 0
  60
  61     yield in_b.stb.eq(0)
  62
  63     yield out_z.ack.eq(1)
  64
  65     while True:
  66         out_z_stb = (yield out_z.stb)
  67         if not out_z_stb:
  68             yield
  69             continue
  70         vout_z = yield out_z.v
  71         #out_mid = yield dut.ids.out_mid
  72         yield out_z.ack.eq(0)
  73         yield
  74         break
  75
  76     return vout_z, mid
  77
  78 def check_case(dut, a, b, z, mid=None):
  79     if mid is None:
  80         mid = randint(0, 6)
  81     mid = 0
  82     out_z, out_mid = yield from get_case(dut, a, b, mid)
  83     assert out_z == z, "Output z 0x%x not equal to expected 0x%x" % (out_z, z)
  84     assert out_mid == mid, "Output mid 0x%x != expected 0x%x" % (out_mid, mid)
  85
  86
  87 def run_test(dut, stimulus_a, stimulus_b, op):
  88
  89     expected_responses = []
  90     actual_responses = []
  91     for a, b in zip(stimulus_a, stimulus_b):
  92         mid = randint(0, 6)
  93         mid = 0
  94         af = Float32.from_bits(a)
  95         bf = Float32.from_bits(b)
  96         z = op(af, bf)
  97         expected_responses.append((z.get_bits(), mid))
  98         #print (af, bf, z)
  99         actual = yield from get_case(dut, a, b, mid)
 100         actual_responses.append(actual)
 101
 102     if len(actual_responses) < len(expected_responses):
 103         print ("Fail ... not enough results")
 104         exit(0)
 105
 106     for expected, actual, a, b in zip(expected_responses, actual_responses,
 107                                       stimulus_a, stimulus_b):
 108         passed = match(expected[0], actual[0])
 109         if expected[1] != actual[1]: # check mid
 110             print ("MID failed", expected[1], actual[1])
 111             sys.exit(0)
 112
 113         if not passed:
 114
 115             print ("Fail ... expected:", hex(expected), "actual:", hex(actual))
 116
 117             print (hex(a))
 118             print ("a mantissa:", a & 0x7fffff)
 119             print ("a exponent:", ((a & 0x7f800000) >> 23) - 127)
 120             print ("a sign:", ((a & 0x80000000) >> 31))
 121
 122             print (hex(b))
 123             print ("b mantissa:", b & 0x7fffff)
 124             print ("b exponent:", ((b & 0x7f800000) >> 23) - 127)
 125             print ("b sign:", ((b & 0x80000000) >> 31))
 126
 127             print (hex(expected))
 128             print ("expected mantissa:", expected & 0x7fffff)
 129             print ("expected exponent:", ((expected & 0x7f800000) >> 23) - 127)
 130             print ("expected sign:", ((expected & 0x80000000) >> 31))
 131
 132             print (hex(actual))
 133             print ("actual mantissa:", actual & 0x7fffff)
 134             print ("actual exponent:", ((actual & 0x7f800000) >> 23) - 127)
 135             print ("actual sign:", ((actual & 0x80000000) >> 31))
 136
 137             sys.exit(0)
 138
 139 corner_cases = [0x80000000, 0x00000000, 0x7f800000, 0xff800000,
 140                 0x7fc00000, 0xffc00000]
 141
 142 def run_corner_cases(dut, count, op):
 143     #corner cases
 144     from itertools import permutations
 145     stimulus_a = [i[0] for i in permutations(corner_cases, 2)]
 146     stimulus_b = [i[1] for i in permutations(corner_cases, 2)]
 147     yield from run_test(dut, stimulus_a, stimulus_b, op)
 148     count += len(stimulus_a)
 149     print (count, "vectors passed")
 150
 151 def run_test_2(dut, stimulus_a, stimulus_b, op):
 152     yield from run_test(dut, stimulus_a, stimulus_b, op)
 153     yield from run_test(dut, stimulus_b, stimulus_a, op)
 154
 155 def run_cases(dut, count, op, fixed_num, num_entries):
 156     if isinstance(fixed_num, int):
 157         stimulus_a = [fixed_num for i in range(num_entries)]
 158         report = hex(fixed_num)
 159     else:
 160         stimulus_a = fixed_num
 161         report = "random"
 162
 163     stimulus_b = [randint(0, 1<<32) for i in range(num_entries)]
 164     yield from run_test_2(dut, stimulus_a, stimulus_b, op)
 165     count += len(stimulus_a)
 166     print (count, "vectors passed 2^32", report)
 167
 168     # non-canonical NaNs.
 169     stimulus_b = [set_exponent(randint(0, 1<<32), 128) \
 170                         for i in range(num_entries)]
 171     yield from run_test_2(dut, stimulus_a, stimulus_b, op)
 172     count += len(stimulus_a)
 173     print (count, "vectors passed Non-Canonical NaN", report)
 174
 175     # -127
 176     stimulus_b = [set_exponent(randint(0, 1<<32), -127) \
 177                         for i in range(num_entries)]
 178     yield from run_test_2(dut, stimulus_a, stimulus_b, op)
 179     count += len(stimulus_a)
 180     print (count, "vectors passed exp=-127", report)
 181
 182     # nearly zero
 183     stimulus_b = [set_exponent(randint(0, 1<<32), -126) \
 184                         for i in range(num_entries)]
 185     yield from run_test_2(dut, stimulus_a, stimulus_b, op)
 186     count += len(stimulus_a)
 187     print (count, "vectors passed exp=-126", report)
 188
 189     # nearly inf
 190     stimulus_b = [set_exponent(randint(0, 1<<32), 127) \
 191                         for i in range(num_entries)]
 192     yield from run_test_2(dut, stimulus_a, stimulus_b, op)
 193     count += len(stimulus_a)
 194     print (count, "vectors passed exp=127", report)
 195
 196     return count
 197
 198 def run_edge_cases(dut, count, op):
 199     #edge cases
 200     for testme in corner_cases:
 201         count = yield from run_cases(dut, count, op, testme, 10)
 202
 203     for i in range(100000):
 204         stimulus_a = [randint(0, 1<<32) for i in range(10)]
 205         count = yield from run_cases(dut, count, op, stimulus_a, 10)
 206     return count
 207