xref: /XiangShan/src/main/scala/xiangshan/backend/regfile/Regfile.scala (revision 067dba721418bd845c9f8927851610c92610bd6a)

package xiangshan.backend.regfile

import chisel3._
import chisel3.util._
import xiangshan._

class RfReadPort extends XSBundle {
  val addr = Input(UInt(PhyRegIdxWidth.W))
  val data = Output(UInt((XLEN + 1).W))
}

class RfWritePort extends XSBundle {
  val wen = Input(Bool())
  val addr = Input(UInt(PhyRegIdxWidth.W))
  val data = Input(UInt((XLEN + 1).W))
}

class Regfile
(
  numReadPorts: Int,
  numWirtePorts: Int,
  hasZero: Boolean,
  len: Int
) extends XSModule {
  val io = IO(new Bundle() {
    val readPorts = Vec(numReadPorts, new RfReadPort)
    val writePorts = Vec(numWirtePorts, new RfWritePort)
  })



  if (!env.FPGAPlatform) {


    val mem = Mem(NRPhyRegs, UInt(len.W))

	for(r <- io.readPorts){
	  val addr_reg = RegNext(r.addr)
	  r.data := {if(hasZero) Mux(addr_reg===0.U, 0.U, mem(addr_reg)) else mem(addr_reg)}
	}

	for(w <- io.writePorts){
	  when(w.wen){
		mem(w.addr) := w.data
	  }
	}

    val debugArchRat = WireInit(VecInit(Seq.fill(32)(0.U(PhyRegIdxWidth.W))))
    ExcitingUtils.addSink(
      debugArchRat,
      if(hasZero) "DEBUG_INI_ARCH_RAT" else "DEBUG_FP_ARCH_RAT",
      ExcitingUtils.Debug
    )

    val debugArchReg = WireInit(VecInit(debugArchRat.zipWithIndex.map(
      x => if(hasZero && x._2==0) 0.U else mem(x._1)
    )))
    ExcitingUtils.addSource(
      debugArchReg,
      if(hasZero) "DEBUG_INT_ARCH_REG" else "DEBUG_FP_ARCH_REG",
      ExcitingUtils.Debug
    )
  } else {

	val regfile = Module(new RegfileBlackBox)

	regfile.io.clk := this.clock
	regfile.io.gpr := hasZero.B

	regfile.io.wen0   := io.writePorts(0).wen
	regfile.io.waddr0 := io.writePorts(0).addr
	regfile.io.wdata0 := io.writePorts(0).data

	regfile.io.wen1   := io.writePorts(1).wen
	regfile.io.waddr1 := io.writePorts(1).addr
	regfile.io.wdata1 := io.writePorts(1).data

	regfile.io.wen2   := io.writePorts(2).wen
	regfile.io.waddr2 := io.writePorts(2).addr
	regfile.io.wdata2 := io.writePorts(2).data

	regfile.io.wen3   := io.writePorts(3).wen
	regfile.io.waddr3 := io.writePorts(3).addr
	regfile.io.wdata3 := io.writePorts(3).data

	regfile.io.wen4   := io.writePorts(4).wen
	regfile.io.waddr4 := io.writePorts(4).addr
	regfile.io.wdata4 := io.writePorts(4).data

	regfile.io.wen5   := io.writePorts(5).wen
	regfile.io.waddr5 := io.writePorts(5).addr
	regfile.io.wdata5 := io.writePorts(5).data

	regfile.io.wen6   := io.writePorts(6).wen
	regfile.io.waddr6 := io.writePorts(6).addr
	regfile.io.wdata6 := io.writePorts(6).data

	regfile.io.wen7   := io.writePorts(7).wen
	regfile.io.waddr7 := io.writePorts(7).addr
	regfile.io.wdata7 := io.writePorts(7).data

	regfile.io.wen8   := false.B   //io.writePorts(8).wen
	regfile.io.waddr8 := DontCare  //io.writePorts(8).addr
	regfile.io.wdata8 := DontCare  //io.writePorts(8).data

	regfile.io.wen9   := false.B   //io.writePorts(9).wen
	regfile.io.waddr9 := DontCare  //io.writePorts(9).addr
	regfile.io.wdata9 := DontCare  //io.writePorts(9).data


	regfile.io.raddr0  := io.readPorts(0).addr
	regfile.io.raddr1  := io.readPorts(1).addr
	regfile.io.raddr2  := io.readPorts(2).addr
	regfile.io.raddr3  := io.readPorts(3).addr
	regfile.io.raddr4  := io.readPorts(4).addr
	regfile.io.raddr5  := io.readPorts(5).addr
	regfile.io.raddr6  := io.readPorts(6).addr
	regfile.io.raddr7  := io.readPorts(7).addr
	regfile.io.raddr8  := io.readPorts(8).addr
	regfile.io.raddr9  := io.readPorts(9).addr
	regfile.io.raddr10 := io.readPorts(10).addr
	regfile.io.raddr11 := io.readPorts(11).addr
	regfile.io.raddr12 := io.readPorts(12).addr
	regfile.io.raddr13 := io.readPorts(13).addr
	regfile.io.raddr14 := DontCare //io.readPorts(14).addr
	regfile.io.raddr15 := DontCare //io.readPorts(15).addr

	io.readPorts(0).data := regfile.io.rdata0
	io.readPorts(1).data := regfile.io.rdata1
	io.readPorts(2).data := regfile.io.rdata2
	io.readPorts(3).data := regfile.io.rdata3
	io.readPorts(4).data := regfile.io.rdata4
	io.readPorts(5).data := regfile.io.rdata5
	io.readPorts(6).data := regfile.io.rdata6
	io.readPorts(7).data := regfile.io.rdata7
	io.readPorts(8).data := regfile.io.rdata8
	io.readPorts(9).data := regfile.io.rdata9
	io.readPorts(10).data := regfile.io.rdata10
	io.readPorts(11).data := regfile.io.rdata11
	io.readPorts(12).data := regfile.io.rdata12
	io.readPorts(13).data := regfile.io.rdata13
  }

}

class RegfileBlackBox extends BlackBox with HasBlackBoxResource {

  val io = IO(new Bundle{
	val clk = Input(Clock())
	val gpr = Input(Bool())

	// write
	val wen0, wen1, wen2, wen3, wen4, wen5, wen6, wen7, wen8, wen9 = Input(Bool())
	val waddr0, waddr1, waddr2, waddr3, waddr4, waddr5, waddr6, waddr7, waddr8, waddr9 = Input(UInt(8.W))
	val wdata0, wdata1, wdata2, wdata3, wdata4, wdata5, wdata6, wdata7, wdata8, wdata9 = Input(UInt(64.W))

	// read
	val raddr0, raddr1, raddr2, raddr3, raddr4, raddr5, raddr6, raddr7 = Input(UInt(8.W))
	val raddr8, raddr9, raddr10, raddr11, raddr12, raddr13, raddr14, raddr15 = Input(UInt(8.W))
	val rdata0, rdata1, rdata2, rdata3, rdata4, rdata5, rdata6, rdata7 = Output(UInt(64.W))
	val rdata8, rdata9, rdata10, rdata11, rdata12, rdata13, rdata14, rdata15 = Output(UInt(64.W))
  })

  val vsrc = "/vsrc/regfile_160x64_10w16r_sim.v"
  println(s"Regfile: Using verilog source at: $vsrc")
  setResource(vsrc)

}