1 from random
import randint
2 from random
import seed
5 from sfpy
import Float32
11 return ((x
& 0x7f800000) >> 23) - 127
14 return ((x
& 0x80000000) >> 31)
17 return get_exponent(x
) == 128 and get_mantissa(x
) != 0
20 return get_exponent(x
) == 128 and get_mantissa(x
) == 0
23 return is_inf(x
) and not get_sign(x
)
26 return is_inf(x
) and get_sign(x
)
30 (is_pos_inf(x
) and is_pos_inf(y
)) or
31 (is_neg_inf(x
) and is_neg_inf(y
)) or
32 (is_nan(x
) and is_nan(y
)) or
36 def get_case(dut
, a
, b
):
37 yield dut
.in_a
.v
.eq(a
)
38 yield dut
.in_a
.stb
.eq(1)
41 a_ack
= (yield dut
.in_a
.ack
)
43 yield dut
.in_b
.v
.eq(b
)
44 yield dut
.in_b
.stb
.eq(1)
45 b_ack
= (yield dut
.in_b
.ack
)
50 out_z_stb
= (yield dut
.out_z
.stb
)
53 yield dut
.in_a
.stb
.eq(0)
54 yield dut
.in_b
.stb
.eq(0)
55 yield dut
.out_z
.ack
.eq(1)
57 yield dut
.out_z
.ack
.eq(0)
62 out_z
= yield dut
.out_z
.v
65 def check_case(dut
, a
, b
, z
):
66 out_z
= yield from get_case(dut
, a
, b
)
67 assert out_z
== z
, "Output z 0x%x not equal to expected 0x%x" % (out_z
, z
)
70 def run_test(dut
, stimulus_a
, stimulus_b
, op
):
72 expected_responses
= []
74 for a
, b
in zip(stimulus_a
, stimulus_b
):
75 af
= Float32
.from_bits(a
)
76 bf
= Float32
.from_bits(b
)
78 expected_responses
.append(z
.get_bits())
80 actual
= yield from get_case(dut
, a
, b
)
81 actual_responses
.append(actual
)
83 if len(actual_responses
) < len(expected_responses
):
84 print ("Fail ... not enough results")
87 for expected
, actual
, a
, b
in zip(expected_responses
, actual_responses
,
88 stimulus_a
, stimulus_b
):
89 passed
= match(expected
, actual
)
93 print ("Fail ... expected:", hex(expected
), "actual:", hex(actual
))
96 print ("a mantissa:", a
& 0x7fffff)
97 print ("a exponent:", ((a
& 0x7f800000) >> 23) - 127)
98 print ("a sign:", ((a
& 0x80000000) >> 31))
101 print ("b mantissa:", b
& 0x7fffff)
102 print ("b exponent:", ((b
& 0x7f800000) >> 23) - 127)
103 print ("b sign:", ((b
& 0x80000000) >> 31))
105 print (hex(expected
))
106 print ("expected mantissa:", expected
& 0x7fffff)
107 print ("expected exponent:", ((expected
& 0x7f800000) >> 23) - 127)
108 print ("expected sign:", ((expected
& 0x80000000) >> 31))
111 print ("actual mantissa:", actual
& 0x7fffff)
112 print ("actual exponent:", ((actual
& 0x7f800000) >> 23) - 127)
113 print ("actual sign:", ((actual
& 0x80000000) >> 31))
117 def run_edge_cases(dut
, count
, op
):
119 stimulus_a
= [0x80000000 for i
in range(1000)]
120 stimulus_b
= [randint(0, 1<<32) for i
in range(1000)]
121 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
122 count
+= len(stimulus_a
)
123 print (count
, "vectors passed")
125 stimulus_a
= [0x00000000 for i
in range(1000)]
126 stimulus_b
= [randint(0, 1<<32) for i
in range(1000)]
127 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
128 count
+= len(stimulus_a
)
129 print (count
, "vectors passed")
131 stimulus_b
= [0x80000000 for i
in range(1000)]
132 stimulus_a
= [randint(0, 1<<32) for i
in range(1000)]
133 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
134 count
+= len(stimulus_a
)
135 print (count
, "vectors passed")
137 stimulus_b
= [0x00000000 for i
in range(1000)]
138 stimulus_a
= [randint(0, 1<<32) for i
in range(1000)]
139 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
140 count
+= len(stimulus_a
)
141 print (count
, "vectors passed")
143 stimulus_a
= [0x7F800000 for i
in range(1000)]
144 stimulus_b
= [randint(0, 1<<32) for i
in range(1000)]
145 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
146 count
+= len(stimulus_a
)
147 print (count
, "vectors passed")
149 stimulus_a
= [0xFF800000 for i
in range(1000)]
150 stimulus_b
= [randint(0, 1<<32) for i
in range(1000)]
151 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
152 count
+= len(stimulus_a
)
153 print (count
, "vectors passed")
155 stimulus_b
= [0x7F800000 for i
in range(1000)]
156 stimulus_a
= [randint(0, 1<<32) for i
in range(1000)]
157 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
158 count
+= len(stimulus_a
)
159 print (count
, "vectors passed")
161 stimulus_b
= [0xFF800000 for i
in range(1000)]
162 stimulus_a
= [randint(0, 1<<32) for i
in range(1000)]
163 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
164 count
+= len(stimulus_a
)
165 print (count
, "vectors passed")
167 stimulus_a
= [0x7FC00000 for i
in range(1000)]
168 stimulus_b
= [randint(0, 1<<32) for i
in range(1000)]
169 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
170 count
+= len(stimulus_a
)
171 print (count
, "vectors passed")
173 stimulus_a
= [0xFFC00000 for i
in range(1000)]
174 stimulus_b
= [randint(0, 1<<32) for i
in range(1000)]
175 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
176 count
+= len(stimulus_a
)
177 print (count
, "vectors passed")
179 stimulus_b
= [0x7FC00000 for i
in range(1000)]
180 stimulus_a
= [randint(0, 1<<32) for i
in range(1000)]
181 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
182 count
+= len(stimulus_a
)
183 print (count
, "vectors passed")
185 stimulus_b
= [0xFFC00000 for i
in range(1000)]
186 stimulus_a
= [randint(0, 1<<32) for i
in range(1000)]
187 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
188 count
+= len(stimulus_a
)
189 print (count
, "vectors passed")
192 for i
in range(100000):
193 stimulus_a
= [randint(0, 1<<32) for i
in range(1000)]
194 stimulus_b
= [randint(0, 1<<32) for i
in range(1000)]
195 yield from run_test(dut
, stimulus_a
, stimulus_b
, op
)
197 print (count
, "random vectors passed")
199 if __name__
== '__main__':
200 dut
= FPADD(width
=32, single_cycle
=True)
201 run_simulation(dut
, testbench(dut
), vcd_name
="test_add.vcd")