xref: /XiangShan/src/main/scala/xiangshan/backend/fu/FunctionUnit.scala (revision 23c67001c32b7e0d38558dbf93f5987c126fdd3c) 
1/***************************************************************************************
2* Copyright (c) 2020-2021 Institute of Computing Technology, Chinese Academy of Sciences
3* Copyright (c) 2020-2021 Peng Cheng Laboratory
4*
5* XiangShan is licensed under Mulan PSL v2.
6* You can use this software according to the terms and conditions of the Mulan PSL v2.
7* You may obtain a copy of Mulan PSL v2 at:
8*          http://license.coscl.org.cn/MulanPSL2
9*
10* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
11* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
12* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
13*
14* See the Mulan PSL v2 for more details.
15***************************************************************************************/
16
17package xiangshan.backend.fu
18
19import chipsalliance.rocketchip.config.Parameters
20import chisel3._
21import chisel3.util._
22import utils.XSPerfAccumulate
23import xiangshan._
24import xiangshan.backend.fu.fpu._
25
26trait HasFuLatency {
27  val latencyVal: Option[Int]
28  val uncertainLatencyVal: Option[Int]
29}
30
31case class CertainLatency(value: Int) extends HasFuLatency {
32  override val latencyVal: Option[Int] = Some(value)
33  override val uncertainLatencyVal: Option[Int] = None
34}
35
36case class UncertainLatency(value: Option[Int]) extends HasFuLatency {
37  override val latencyVal: Option[Int] = None
38  override val uncertainLatencyVal: Option[Int] = value
39}
40
41object UncertainLatency {
42  def apply(): UncertainLatency = UncertainLatency(None)
43  def apply(value: Int): UncertainLatency = UncertainLatency(Some(value))
44}
45
46class FuOutput(val len: Int)(implicit p: Parameters) extends XSBundle {
47  val data = UInt(len.W)
48  val uop = new MicroOp
49}
50
51class FunctionUnitInput(val len: Int)(implicit p: Parameters) extends XSBundle {
52  val src = Vec(3, UInt(len.W))
53  val uop = new MicroOp
54}
55
56class FunctionUnitIO(val len: Int)(implicit p: Parameters) extends XSBundle {
57  val in = Flipped(DecoupledIO(new FunctionUnitInput(len)))
58
59  val out = DecoupledIO(new FuOutput(len))
60
61  val redirectIn = Flipped(ValidIO(new Redirect))
62}
63
64abstract class FunctionUnit(len: Int = 64)(implicit p: Parameters) extends XSModule {
65
66  val io = IO(new FunctionUnitIO(len))
67
68  XSPerfAccumulate("in_valid", io.in.valid)
69  XSPerfAccumulate("in_fire", io.in.fire)
70  XSPerfAccumulate("out_valid", io.out.valid)
71  XSPerfAccumulate("out_fire", io.out.fire)
72
73}
74