blob: 0c3a0633e394a2b34d9645609a44aab27e442fbd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
// SPDX-License-Identifier: Apache-2.0
package chiselTests
import chisel3._
import chisel3.experimental._
import chisel3.stage.ChiselStage
import chisel3.testers.{BasicTester, TesterDriver}
// Avoid collisions with regular BlackBox tests by putting ExtModule blackboxes
// in their own scope.
package ExtModule {
import chisel3.experimental.ExtModule
class BlackBoxInverter extends ExtModule {
val in = IO(Input(Bool()))
val out = IO(Output(Bool()))
}
class BlackBoxPassthrough extends ExtModule {
val in = IO(Input(Bool()))
val out = IO(Output(Bool()))
}
}
class ExtModuleTester extends BasicTester {
val blackBoxPos = Module(new ExtModule.BlackBoxInverter)
val blackBoxNeg = Module(new ExtModule.BlackBoxInverter)
blackBoxPos.in := 1.U
blackBoxNeg.in := 0.U
assert(blackBoxNeg.out === 1.U)
assert(blackBoxPos.out === 0.U)
stop()
}
/** Instantiate multiple BlackBoxes with similar interfaces but different
* functionality. Used to detect failures in BlackBox naming and module
* deduplication.
*/
class MultiExtModuleTester extends BasicTester {
val blackBoxInvPos = Module(new ExtModule.BlackBoxInverter)
val blackBoxInvNeg = Module(new ExtModule.BlackBoxInverter)
val blackBoxPassPos = Module(new ExtModule.BlackBoxPassthrough)
val blackBoxPassNeg = Module(new ExtModule.BlackBoxPassthrough)
blackBoxInvPos.in := 1.U
blackBoxInvNeg.in := 0.U
blackBoxPassPos.in := 1.U
blackBoxPassNeg.in := 0.U
assert(blackBoxInvNeg.out === 1.U)
assert(blackBoxInvPos.out === 0.U)
assert(blackBoxPassNeg.out === 0.U)
assert(blackBoxPassPos.out === 1.U)
stop()
}
class ExtModuleSpec extends ChiselFlatSpec {
"A ExtModule inverter" should "work" in {
assertTesterPasses({ new ExtModuleTester },
Seq("/chisel3/BlackBoxTest.v"), TesterDriver.verilatorOnly)
}
"Multiple ExtModules" should "work" in {
assertTesterPasses({ new MultiExtModuleTester },
Seq("/chisel3/BlackBoxTest.v"), TesterDriver.verilatorOnly)
}
"DataMirror.modulePorts" should "work with ExtModule" in {
ChiselStage.elaborate(new Module {
val io = IO(new Bundle { })
val m = Module(new ExtModule.BlackBoxPassthrough)
assert(DataMirror.modulePorts(m) == Seq(
"in" -> m.in, "out" -> m.out))
})
}
}
|
