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// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package common
import chisel3._
import chisel3.util._
import chiseltest._
import org.scalatest.freespec.AnyFreeSpec
import chisel3.experimental.BundleLiterals._
class Fp32Tester extends Module {
val io = IO(new Bundle {
val in = Input(UInt(32.W))
val is_zero = Output(Bool())
val is_inf = Output(Bool())
val is_nan = Output(Bool())
})
val fp = Fp32.fromWord(io.in)
io.is_zero := fp.isZero()
io.is_inf := fp.isInf()
io.is_nan := fp.isNan()
}
class FpSpec extends AnyFreeSpec with ChiselScalatestTester {
"Zero" in {
test(new Fp32Tester()) { dut =>
dut.io.in.poke(0.U)
assert(dut.io.is_zero.peekInt() == 1)
assert(dut.io.is_inf.peekInt() == 0)
assert(dut.io.is_nan.peekInt() == 0)
}
}
"Inf" in {
test(new Fp32Tester()) { dut =>
dut.io.in.poke(BigInt(
"0" + "11111111" + "00000000000000000000000", 2))
assert(dut.io.is_zero.peekInt() == 0)
assert(dut.io.is_inf.peekInt() == 1)
assert(dut.io.is_nan.peekInt() == 0)
dut.io.in.poke(BigInt(
"1" + "11111111" + "00000000000000000000000", 2))
assert(dut.io.is_zero.peekInt() == 0)
assert(dut.io.is_inf.peekInt() == 1)
assert(dut.io.is_nan.peekInt() == 0)
}
}
"Nan" in {
test(new Fp32Tester()) { dut =>
dut.io.in.poke(BigInt(
"0" + "11111111" + "00011000011000111000100", 2))
assert(dut.io.is_zero.peekInt() == 0)
assert(dut.io.is_inf.peekInt() == 0)
assert(dut.io.is_nan.peekInt() == 1)
dut.io.in.poke(BigInt(
"1" + "11111111" + "00011000011000111000100", 2))
assert(dut.io.is_zero.peekInt() == 0)
assert(dut.io.is_inf.peekInt() == 0)
assert(dut.io.is_nan.peekInt() == 1)
}
}
}