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// See LICENSE for license details.
package chiselTests
import chisel3._
import chisel3.testers.BasicTester
class MemorySearch extends Module {
val io = IO(new Bundle {
val target = Input(UInt.width(4))
val en = Input(Bool())
val done = Output(Bool())
val address = Output(UInt.width(3))
})
val vals = Array(0, 4, 15, 14, 2, 5, 13)
val index = Reg(init = UInt(0, width = 3))
val elts = Vec(vals.map(UInt(_,4)))
// val elts = Mem(UInt(width = 32), 8) TODO ????
val elt = elts(index)
val end = !io.en && ((elt === io.target) || (index === UInt(7)))
when (io.en) {
index := UInt(0)
} .elsewhen (!end) {
index := index +% UInt(1)
}
io.done := end
io.address := index
}
/*
class MemorySearchTester(c: MemorySearch) extends Tester(c) {
val list = c.vals
val n = 8
val maxT = n * (list.length + 3)
for (k <- 0 until n) {
val target = rnd.nextInt(16)
poke(c.io.en, 1)
poke(c.io.target, target)
step(1)
poke(c.io.en, 0)
do {
step(1)
} while (peek(c.io.done) == 0 && t < maxT)
val addr = peek(c.io.address).toInt
expect(addr == list.length || list(addr) == target,
"LOOKING FOR " + target + " FOUND " + addr)
}
}
*/
class MemorySearchSpec extends ChiselPropSpec {
property("MemorySearch should elaborate") {
elaborate { new EnableShiftRegister }
}
ignore("MemorySearch should return the correct result") { }
}
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