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Commit a09d132d authored by Jens Korinth's avatar Jens Korinth
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Replace unit tests for DataWidthConverter with property spec 

* replaced unit test with much more generic property specs
* also refactored test classes into module-subpackages
parent 52b5a373
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src/test/scala/DataWidthConverterSuiteCorrectness.scala deleted 100644 → 0
View file @ 52b5a373
package chisel.miscutils
import chisel3._
import chisel3.util._
import chisel3.iotesters.{ChiselFlatSpec, Driver, PeekPokeTester}
import org.scalatest.junit.JUnitSuite
import scala.math._
import java.nio.file.Paths
/**
* DataWidthConverterHarness: Correctness test harness.
* A DecoupledDataSource with random data is connected to a pair
* of data width converters with inverted params. This circuit
* must behave exactly like a delay on the input stream (where
* the length of the delay is 2 * in/out-width-ratio).
* There's a slow queue in-between to simulate receivers with
* varying speed of consumption.
**/
class DataWidthConverterHarness(inWidth: Int, outWidth: Int, littleEndian: Boolean, delay: Int = 10) extends Module {
require (delay > 0, "delay bitwidth must be > 0")
val io = IO(new Bundle {
val dly = Input(UInt(log2Ceil(delay).W))
val dsrc_out_valid = Output(Bool())
val dsrc_out_bits = Output(UInt())
val dwc_inq_valid = Output(Bool())
val dwc_inq_ready = Output(Bool())
val dwc_deq_valid = Output(Bool())
val dwc_deq_ready = Output(Bool())
val dwc2_inq_valid = Output(Bool())
val dwc2_deq_valid = Output(Bool())
val dwc2_deq_ready = Output(Bool())
val dwc2_deq_bits = Output(UInt())
})
val dwc = Module(new DataWidthConverter(inWidth, outWidth, littleEndian))
val dsrc = Module(new DecoupledDataSource(UInt(inWidth.W),
Seq(Seq(pow(2, inWidth).toLong, dwc.ratio).max, 500.toLong).min.toInt,
n => (scala.math.random * pow(2, inWidth)).toLong.U,
repeat = false))
val dwc2 = Module(new DataWidthConverter(outWidth, inWidth, littleEndian))
val slq = Module(new SlowQueue(outWidth, delay))
dwc.io.inq <> dsrc.io.out
slq.io.enq <> dwc.io.deq
slq.io.dly := io.dly
dwc2.io.inq <> slq.io.deq
dwc2.io.deq.ready := true.B
// internal peek-and-poke does not work, need to wire as outputs:
io.dsrc_out_valid := dsrc.io.out.valid
io.dsrc_out_bits := dsrc.io.out.bits
io.dwc_inq_valid := dwc.io.inq.valid
io.dwc_inq_ready := dwc.io.inq.ready
io.dwc_deq_valid := dwc.io.deq.valid
io.dwc_deq_ready := dwc.io.deq.ready
io.dwc2_inq_valid := dwc2.io.inq.valid
io.dwc2_deq_valid := dwc2.io.deq.valid
io.dwc2_deq_ready := dwc2.io.deq.ready
io.dwc2_deq_bits := dwc2.io.deq.bits
}
/**
* Generic tester for DataWidthConverterHarness:
* Uses DataWidthConverterHarness class to check output correctness.
* Tracks incoming data from the data source in expecteds list.
* Whenever output is valid, it is compared to the expecteds,
* mismatches are reported accordingly.
* Does NOT check timing, only correctness of the output values.
**/
class DataWidthConverterCorrectnessTester[T <: UInt](m: DataWidthConverterHarness) extends PeekPokeTester(m) {
import scala.util.Properties.{lineSeparator => NL}
// returns binary string for Int, e.g., 0011 for 3, width 4
private def toBinaryString(n: BigInt, width: Int) =
"%%%ds".format(width).format(n.toString(2)).replace(' ', '0')
/** Performs data correctness check. **/
def check() = {
var i = 0
var delay = m.slq.delay - 1
poke (m.io.dly, delay)
var expecteds: List[BigInt] = List()
def running = peek(m.io.dsrc_out_valid) > 0 ||
peek(m.io.dwc_inq_valid) > 0 ||
peek(m.io.dwc_deq_valid) > 0 ||
peek(m.io.dwc2_inq_valid) > 0 ||
peek(m.io.dwc2_deq_valid) > 0
while (running) {
// scan output element and add to end of expected list
if (peek(m.io.dsrc_out_valid) > 0 && peek(m.io.dwc_inq_ready) > 0) {
val e = peek(m.io.dsrc_out_bits)
expecteds = expecteds :+ e
println ("adding expected value: %d (%s)".format(e, toBinaryString(e, m.dwc.inWidth)))
}
// check output element: must match head of expecteds
if (peek(m.io.dwc2_deq_valid) > 0 && peek(m.io.dwc2_deq_ready) > 0) {
// update delay (decreasing with each output)
delay = if (delay == 0) m.slq.delay - 1 else delay - 1
poke(m.io.dly, delay)
// check output
val v = peek(m.io.dwc2_deq_bits)
if (expecteds.isEmpty) {
val errmsg = "received value output value %d (%s), but none expected yet".format(
v, toBinaryString(v, m.dwc.inWidth))
println (errmsg)
expect(false, errmsg)
} else {
if (v == expecteds.head) {
println ("element #%d ok!".format(i))
} else {
val errmsg = "element #%d wrong: expected %d (%s), found %d (%s)".format(
i, expecteds.head, toBinaryString(expecteds.head, m.dwc.inWidth),
v, toBinaryString(v, m.dwc.inWidth))
println (errmsg)
expect(v == expecteds.head, errmsg)
}
expecteds = expecteds.tail
}
i += 1
}
// advance sim
step (1)
}
}
reset(10) // reset for 10 cycles
check()
step (20) // settle output
}
/** Unit test for DataWidthConverter hardware. **/
class DataWidthConverterSuite extends ChiselFlatSpec {
def resize(inWidth: Int, outWidth: Int, littleEndian: Boolean = true) = {
println("testing conversion of %d bit to %d bit, %s ..."
.format(inWidth, outWidth, if (littleEndian) "little-endian" else "big-endian"))
val dir = Paths.get("test")
.resolve("DataWidthConverterSuite")
.resolve("%dto%d%s".format(inWidth, outWidth, if (littleEndian) "le" else "be"))
.toString
Driver.execute(Array("--fint-write-vcd", "--target-dir", dir),
() => new DataWidthConverterHarness(inWidth, outWidth, littleEndian))
{ m => new DataWidthConverterCorrectnessTester(m) }
}
// simple test group, can be used for waveform analysis
/*"check16to4le" should "be ok" in { resize(16, 4, true) }
"check4to16le" should "be ok" in { resize(4, 16, true) }
"check16to4be" should "be ok" in { resize(16, 4, false) }
"check4to16be" should "be ok" in { resize(4, 16, false) }
"check64to32be" should "be ok" in { resize(64, 32, false) }*/
// downsizing tests
"check2to1le" should "be ok" in { resize(2, 1, true) }
"check2to1be" should "be ok" in { resize(2, 1, false) }
"check8to1le" should "be ok" in { resize(8, 1, true) }
"check8to1be" should "be ok" in { resize(8, 1, false) }
"check16to4le" should "be ok" in { resize(16, 4, true) }
"check16to4be" should "be ok" in { resize(16, 4, false) }
"check16to8le" should "be ok" in { resize(16, 8, true) }
"check16to8be" should "be ok" in { resize(16, 8, false) }
"check32to8le" should "be ok" in { resize(32, 8, true) }
"check32to8be" should "be ok" in { resize(32, 8, false) }
"check64ot8le" should "be ok" in { resize(64, 8, true) }
"check64to8be" should "be ok" in { resize(64, 8, false) }
"check64ot32le" should "be ok" in { resize(64, 32, true) }
"check64to32be" should "be ok" in { resize(64, 32, false) }
// upsizing tests
"check1to2le" should "be ok" in { resize(1, 2, true) }
"check1to2be" should "be ok" in { resize(1, 2, false) }
"check1to8le" should "be ok" in { resize(1, 8, true) }
"check1to8be" should "be ok" in { resize(1, 8, false) }
"check4to16le" should "be ok" in { resize(4, 16, true) }
"check4to16be" should "be ok" in { resize(4, 16, false) }
"check8to16le" should "be ok" in { resize(8, 16, true) }
"check8to16be" should "be ok" in { resize(8, 16, false) }
"check8to32le" should "be ok" in { resize(8, 32, true) }
"check8to32be" should "be ok" in { resize(8, 32, false) }
"check8ot64le" should "be ok" in { resize(8, 64, true) }
"check8to64be" should "be ok" in { resize(8, 64, false) }
"check32ot64le" should "be ok" in { resize(32, 64, true) }
"check32to64be" should "be ok" in { resize(32, 64, false) }
}
src/test/scala/datawidthconverter/CorrectnessHarness.scala 0 → 100644
View file @ a09d132d
package chisel.miscutils.datawidthconverter
import chisel.miscutils._
import chisel3._
import chisel3.util._
import math.pow
/** Correctness test harness for DataWidthConverter:
* A DecoupledDataSource with random data is connected to a pair
* of data width converters with inverted params. This circuit
* must behave exactly like a delay on the input stream (where
* the length of the delay is 2 * in/out-width-ratio).
* There's a slow queue in-between to simulate receivers with
* varying speed of consumption.
* @param inWidth Bit width of input data.
* @param outWidth Bit width of output data (in and out must be
* integer multiples/fractions of each other)
* @param littleEndian Byte-endianess.
* @param delay Clock cycle delay in [[SlowQueue]].
*/
class CorrectnessHarness(inWidth: Int,
outWidth: Int,
littleEndian: Boolean,
delay: Int = 10) extends Module {
require (delay > 0, "delay bitwidth must be > 0")
val io = IO(new Bundle {
val dly = Input(UInt(log2Ceil(delay).W))
val dsrc_out_valid = Output(Bool())
val dsrc_out_bits = Output(UInt())
val dwc_inq_valid = Output(Bool())
val dwc_inq_ready = Output(Bool())
val dwc_deq_valid = Output(Bool())
val dwc_deq_ready = Output(Bool())
val dwc2_inq_valid = Output(Bool())
val dwc2_deq_valid = Output(Bool())
val dwc2_deq_ready = Output(Bool())
val dwc2_deq_bits = Output(UInt())
})
val dwc = Module(new DataWidthConverter(inWidth, outWidth, littleEndian))
val dsrc = Module(new DecoupledDataSource(UInt(inWidth.W),
Seq(Seq(pow(2, inWidth).toLong, dwc.ratio).max, 500.toLong).min.toInt,
n => (scala.math.random * pow(2, inWidth)).toLong.U,
repeat = false))
val dwc2 = Module(new DataWidthConverter(outWidth, inWidth, littleEndian))
val slq = Module(new SlowQueue(outWidth, delay))
dwc.io.inq <> dsrc.io.out
slq.io.enq <> dwc.io.deq
slq.io.dly := io.dly
dwc2.io.inq <> slq.io.deq
dwc2.io.deq.ready := true.B
// internal peek-and-poke does not work, need to wire as outputs:
io.dsrc_out_valid := dsrc.io.out.valid
io.dsrc_out_bits := dsrc.io.out.bits
io.dwc_inq_valid := dwc.io.inq.valid
io.dwc_inq_ready := dwc.io.inq.ready
io.dwc_deq_valid := dwc.io.deq.valid
io.dwc_deq_ready := dwc.io.deq.ready
io.dwc2_inq_valid := dwc2.io.inq.valid
io.dwc2_deq_valid := dwc2.io.deq.valid
io.dwc2_deq_ready := dwc2.io.deq.ready
io.dwc2_deq_bits := dwc2.io.deq.bits
}
src/test/scala/datawidthconverter/CorrectnessTester.scala 0 → 100644
View file @ a09d132d
package chisel.miscutils.datawidthconverter
import chisel.miscutils._
import chisel3._, chisel3.util._
import chisel3.iotesters.{ChiselFlatSpec, Driver, PeekPokeTester}
/** Generic tester for [[CorrectnessHarness]]:
* Uses DataWidthConverterHarness class to check output correctness.
* Tracks incoming data from the data source in expecteds list.
* Whenever output is valid, it is compared to the expecteds,
* mismatches are reported accordingly.
* Does NOT check timing, only correctness of the output values.
**/
class CorrectnessTester[T <: UInt](m: CorrectnessHarness) extends PeekPokeTester(m) {
import scala.util.Properties.{lineSeparator => NL}
// returns binary string for Int, e.g., 0011 for 3, width 4
private def toBinaryString(n: BigInt, width: Int) =
"%%%ds".format(width).format(n.toString(2)).replace(' ', '0')
/** Performs data correctness check. **/
def check() = {
var i = 0
var delay = m.slq.delay - 1
poke (m.io.dly, delay)
var expecteds: List[BigInt] = List()
def running = peek(m.io.dsrc_out_valid) > 0 ||
peek(m.io.dwc_inq_valid) > 0 ||
peek(m.io.dwc_deq_valid) > 0 ||
peek(m.io.dwc2_inq_valid) > 0 ||
peek(m.io.dwc2_deq_valid) > 0
while (running) {
// scan output element and add to end of expected list
if (peek(m.io.dsrc_out_valid) > 0 && peek(m.io.dwc_inq_ready) > 0) {
val e = peek(m.io.dsrc_out_bits)
expecteds = expecteds :+ e
//println ("adding expected value: %d (%s)".format(e, toBinaryString(e, m.dwc.inWidth)))
}
// check output element: must match head of expecteds
if (peek(m.io.dwc2_deq_valid) > 0 && peek(m.io.dwc2_deq_ready) > 0) {
// update delay (decreasing with each output)
delay = if (delay == 0) m.slq.delay - 1 else delay - 1
poke(m.io.dly, delay)
// check output
val v = peek(m.io.dwc2_deq_bits)
if (expecteds.isEmpty) {
val errmsg = "received value output value %d (%s), but none expected yet"
.format(v, toBinaryString(v, m.dwc.inWidth))
println (errmsg)
expect(false, errmsg)
} else {
if (v == expecteds.head) {
// println ("element #%d ok!".format(i))
} else {
val errmsg = "element #%d wrong: expected %d (%s), found %d (%s)".format(
i, expecteds.head, toBinaryString(expecteds.head, m.dwc.inWidth),
v, toBinaryString(v, m.dwc.inWidth))
println (errmsg)
expect(v == expecteds.head, errmsg)
}
expecteds = expecteds.tail
}
i += 1
}
// advance sim
step (1)
}
}
reset(10) // reset for 10 cycles
check()
step (20) // settle output
}
src/test/scala/DataWidthConverterCorrectnessSpec.scala → src/test/scala/datawidthconverter/DataWidthConverterSpec.scala
View file @ a09d132d
package chisel.miscutils
package chisel.miscutils.datawidthconverter
import chisel.miscutils._
import chisel3.iotesters.{ChiselFlatSpec, Driver, PeekPokeTester}
import org.scalacheck._, org.scalacheck.Prop._
import org.scalatest.prop.Checkers
import generators._
class DataWidthConverterCorrectnessSpec extends ChiselFlatSpec with Checkers {
class DataWidthConverterSpec extends ChiselFlatSpec with Checkers {
behavior of "DataWidthConverter"
it should "preserve data integrity in arbitrary conversions" in
check(forAll(bitWidthGen(64), Arbitrary.arbitrary[Boolean], genLimited(1, 100)) {
case (inW, littleEndian, delay) =>
forAll(conversionWidthGen(inW)) { outW =>
println("Testing bitwidth conversion from %d bits -> %d bits (%s) with %d delay"
.format(inW:Int, outW:Int, if (littleEndian) "little-endian" else "big-endian", delay:Int))
Driver.execute(Array("--fint-write-vcd", "--target-dir", "test/DataWidthConverter"),
() => new CorrectnessHarness(inW, outW, littleEndian, delay))
{ m => new CorrectnessTester(m) }
}
})
it should "transfer data with minimal delays" in
check(forAll(bitWidthGen(64), Arbitrary.arbitrary[Boolean]) { case (inW, littleEndian) =>
forAll(conversionWidthGen(inW)) { outW =>
println("Testing bitwidth conversion from %d bits -> %d bits (%s)"
.format(inW:Int, outW:Int, if (littleEndian) "little-endian" else "big-endian"))
Driver.execute(Array("--fint-write-vcd", "--target-dir", "test/DataWidthConverter"),
() => new DataWidthConverterHarness(inW, outW, littleEndian))
{ m => new DataWidthConverterCorrectnessTester(m) }
() => new MinimalDelayHarness(inW, outW, littleEndian))
{ m => new MinimalDelayTester(m) }
}
}, minSuccessful(20))
})
}
src/test/scala/datawidthconverter/MinimalDelayHarness.scala 0 → 100644
View file @ a09d132d
package chisel.miscutils.datawidthconverter
import chisel.miscutils._
import chisel3._, chisel3.util._
import math.pow
/** Minimal delay test harness for DataWidthConverter:
* A DecoupledDataSource with random data is connected to a pair
* of data width converters with inverted params. This circuit
* must behave exactly like a delay on the input stream (where
* the length of the delay is 2 * in/out-width-ratio).
* @param inWidth Bit width of input data.
* @param outWIdth Bit width of output data (must be integer
* multiple/fraction of input width)
* @param littleEndianess Byte-endianess.
**/
class MinimalDelayHarness(val inWidth: Int,
val outWidth: Int,
val littleEndian: Boolean) extends Module {
val io = IO(new Bundle {
val dsrc_out_valid = Output(Bool())
val dsrc_out_bits = Output(UInt())
val dwc_inq_valid = Output(Bool())
val dwc_inq_ready = Output(Bool())
val dwc_deq_valid = Output(Bool())
val dwc_deq_ready = Output(Bool())
val dwc2_inq_valid = Output(Bool())
val dwc2_deq_valid = Output(Bool())
val dwc2_deq_ready = Output(Bool())
val dwc2_deq_bits = Output(UInt())
})
val dwc = Module(new DataWidthConverter(inWidth, outWidth, littleEndian))
val dsrc = Module(new DecoupledDataSource(UInt(inWidth.W),
Seq(Seq(pow(2, inWidth).toLong, dwc.ratio).max, 500.toLong).min.toInt,
//n => UInt(n % pow(2, inWidth).toInt + 1, width = inWidth),
n => (scala.math.random * pow(2, inWidth)).toLong.U,
repeat = false))
val dwc2 = Module(new DataWidthConverter(outWidth, inWidth, littleEndian))
dwc.io.inq <> dsrc.io.out
dwc2.io.inq <> dwc.io.deq
dwc2.io.deq.ready := !reset
// internal peek-and-poke does not work, need to wire as outputs:
io.dsrc_out_valid := dsrc.io.out.valid
io.dsrc_out_bits := dsrc.io.out.bits
io.dwc_inq_valid := dwc.io.inq.valid
io.dwc_inq_ready := dwc.io.inq.ready
io.dwc_deq_valid := dwc.io.deq.valid
io.dwc_deq_ready := dwc.io.deq.ready
io.dwc2_inq_valid := dwc2.io.inq.valid
io.dwc2_deq_valid := dwc2.io.deq.valid
io.dwc2_deq_ready := dwc2.io.deq.ready
io.dwc2_deq_bits := dwc2.io.deq.bits
}
src/test/scala/DataWidthConverterSuiteFullSpeed.scala → src/test/scala/datawidthconverter/MinimalDelayTester.scala
View file @ a09d132d
package chisel.miscutils
import chisel3._
import chisel3.util._
import chisel3.iotesters.{ChiselFlatSpec, Driver, PeekPokeTester}
import scala.math._
import java.nio.file.Paths
/**
* DataWidthConverterHarness: Correctness test harness.
* A DecoupledDataSource with random data is connected to a pair
* of data width converters with inverted params. This circuit
* must behave exactly like a delay on the input stream (where
* the length of the delay is 2 * in/out-width-ratio).
**/
class DataWidthConverterHarnessFullSpeed(val inWidth: Int, val outWidth: Int, val littleEndian: Boolean) extends Module {
val io = IO(new Bundle {
val dsrc_out_valid = Output(Bool())
val dsrc_out_bits = Output(UInt())
val dwc_inq_valid = Output(Bool())
val dwc_inq_ready = Output(Bool())
val dwc_deq_valid = Output(Bool())
val dwc_deq_ready = Output(Bool())
val dwc2_inq_valid = Output(Bool())
val dwc2_deq_valid = Output(Bool())
val dwc2_deq_ready = Output(Bool())
val dwc2_deq_bits = Output(UInt())
})
val dwc = Module(new DataWidthConverter(inWidth, outWidth, littleEndian))
val dsrc = Module(new DecoupledDataSource(UInt(inWidth.W),
Seq(Seq(pow(2, inWidth).toLong, dwc.ratio).max, 500.toLong).min.toInt,
//n => UInt(n % pow(2, inWidth).toInt + 1, width = inWidth),
n => (scala.math.random * pow(2, inWidth)).toLong.U,
repeat = false))
val dwc2 = Module(new DataWidthConverter(outWidth, inWidth, littleEndian))
dwc.io.inq <> dsrc.io.out
dwc2.io.inq <> dwc.io.deq
dwc2.io.deq.ready := !reset
// internal peek-and-poke does not work, need to wire as outputs:
io.dsrc_out_valid := dsrc.io.out.valid
io.dsrc_out_bits := dsrc.io.out.bits
io.dwc_inq_valid := dwc.io.inq.valid
io.dwc_inq_ready := dwc.io.inq.ready
io.dwc_deq_valid := dwc.io.deq.valid
io.dwc_deq_ready := dwc.io.deq.ready
io.dwc2_inq_valid := dwc2.io.inq.valid
io.dwc2_deq_valid := dwc2.io.deq.valid
io.dwc2_deq_ready := dwc2.io.deq.ready
io.dwc2_deq_bits := dwc2.io.deq.bits
}
/**
* Generic tester for DataWidthConverterHarness:
* Uses DataWidthConverterHarness class to check output correctness.
* Tracks incoming data from the data source in expecteds list.
* Whenever output is valid, it is compared to the expecteds,
* mismatches are reported accordingly.
* Does NOT check timing, only correctness of the output values.
**/
class DataWidthConverterFullSpeed[T <: UInt](m: DataWidthConverterHarnessFullSpeed) extends PeekPokeTester(m) {
import scala.util.Properties.{lineSeparator => NL}
package chisel.miscutils.datawidthconverter
import chisel.miscutils._
import chisel3._, chisel3.util._
import chisel3.iotesters.PeekPokeTester
import math.pow
/** Generic tester for [[MinimalDelayHarness]]:
* Performs the same check as [[CorrectnessTester]], but without the slow
* queue in between; in this scenario, the DataWidthConverter under test may
* either never block on the in-queue (upsizing) or always be valid at the
* out-queue (downsizing). This guarantess maximal throughput for the selected
* conversion ratio.
**/
class MinimalDelayTester[T <: UInt](m: MinimalDelayHarness) extends PeekPokeTester(m) {
// returns binary string for Int, e.g., 0011 for 3, width 4
private def toBinaryString(n: BigInt, width: Int) =
"%%%ds".format(width).format(n.toString(2)).replace(' ', '0')
......@@ -77,7 +29,6 @@ class DataWidthConverterFullSpeed[T <: UInt](m: DataWidthConverterHarnessFullSpe
while (running) {
// scan output element and add to end of expected list
if (peek(m.io.dsrc_out_valid) > 0 && peek(m.io.dwc_inq_ready) > 0) {
//val e = peek(m.dsrc.io.out.bits)
val e = peek(m.io.dsrc_out_bits)
expecteds = expecteds :+ e
println ("adding expected value: %d (%s)".format(e, toBinaryString(e, m.dwc.inWidth)))
......@@ -88,8 +39,8 @@ class DataWidthConverterFullSpeed[T <: UInt](m: DataWidthConverterHarnessFullSpe
firstOutputReceived = true
val v = peek(m.io.dwc2_deq_bits)
if (expecteds.isEmpty) {
val errmsg = "received value output value %d (%s), but none expected yet".format(
v, toBinaryString(v, m.dwc.inWidth))
val errmsg = "received value output value %d (%s), but none expected yet"
.format(v, toBinaryString(v, m.dwc.inWidth))
println (errmsg)
expect(false, errmsg)
} else {
......@@ -134,59 +85,3 @@ class DataWidthConverterFullSpeed[T <: UInt](m: DataWidthConverterHarnessFullSpe
check()
step (20) // settle output
}
/** Unit test for DataWidthConverter hardware. **/
class DataWidthConverterSuiteFullSpeed extends ChiselFlatSpec {
def resize(inWidth: Int, outWidth: Int, littleEndian: Boolean = true) = {
println("testing conversion of %d bit to %d bit, %s ..."
.format(inWidth, outWidth, if (littleEndian) "little-endian" else "big-endian"))
val dir = Paths.get("test")
.resolve("dwc_fullspeed")
.resolve("%dto%d%s".format(inWidth, outWidth, if (littleEndian) "le" else "be"))
.toString
Driver.execute(Array("--fint-write-vcd", "--target-dir", dir, "--no-dce"),
() => new DataWidthConverterHarnessFullSpeed(inWidth, outWidth, littleEndian))
{ m => new DataWidthConverterFullSpeed(m) }
}
// simple test group, can be used for waveform analysis
/*"check16to4le" should "be ok" in { resize(16, 4, true) }
"check4to16le" should "be ok" in { resize(4, 16, true) }
"check16to4be" should "be ok" in { resize(16, 4, false) }
"check4to16be" should "be ok" in { resize(4, 16, false) }
"check64to32be" should "be ok" in { resize(64, 32, false) }
"check32to64be" should "be ok" in { resize(32, 64, false) }*/
// downsizing tests
"check2to1le" should "be ok" in { resize(2, 1, true) }
"check2to1be" should "be ok" in { resize(2, 1, false) }
"check8to1le" should "be ok" in { resize(8, 1, true) }
"check8to1be" should "be ok" in { resize(8, 1, false) }
"check16to4le" should "be ok" in { resize(16, 4, true) }
"check16to4be" should "be ok" in { resize(16, 4, false) }
"check16to8le" should "be ok" in { resize(16, 8, true) }
"check16to8be" should "be ok" in { resize(16, 8, false) }
"check32to8le" should "be ok" in { resize(32, 8, true) }
"check32to8be" should "be ok" in { resize(32, 8, false) }
"check64ot8le" should "be ok" in { resize(64, 8, true) }
"check64to8be" should "be ok" in { resize(64, 8, false) }
"check64ot32le" should "be ok" in { resize(64, 32, true) }
"check64to32be" should "be ok" in { resize(64, 32, false) }
// upsizing tests
"check1to2le" should "be ok" in { resize(1, 2, true) }
"check1to2be" should "be ok" in { resize(1, 2, false) }
"check1to8le" should "be ok" in { resize(1, 8, true) }
"check1to8be" should "be ok" in { resize(1, 8, false) }
"check4to16le" should "be ok" in { resize(4, 16, true) }
"check4to16be" should "be ok" in { resize(4, 16, false) }
"check8to16le" should