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