package BACK

import chisel3._
import chisel3.util._


// class MirrorSRAM(dw: Int,  cl: Int) extends RawModule {
//   def line_w   = log2Ceil(cl)
//   val io = IO(new Bundle{
//     val addrr  = Input(UInt(line_w.W))
//     val addrw  = Input(UInt(line_w.W))

//     val dataw = Input( UInt(dw.W) )
//     val datar = Output( UInt(dw.W) )
//     val enw   = Input(Bool())
//     val enr   = Input(Bool())

//     val clock = Input(Bool())
//     val reset = Input(Bool())
//   })


//   withClockAndReset( io.clock.asClock, io.reset ){
//     val mem = SyncReadMem( cl, UInt(dw.W) )




//     io.datar := DontCare
//     when( io.enr ) {
//       io.datar := mem.read( io.addrr )
//     } 
//     when( io.enw ) {
//       mem.write( io.addrw, io.dataw )
//     }
//   }




// }







//     val addrr  = Input(UInt(line_w.W))
//     val addrw  = Input(UInt(line_w.W))

//     val dataw = Input( UInt(dw.W) )
//     val datar = Output( UInt(dw.W) )
//     val enw   = Input(Bool())
//     val enr   = Input(Bool())

//     val clock = Input(Bool())
//     val reset = Input(Bool())


class MirrorSRAM(dw: Int,  cl: Int) extends BlackBox with HasBlackBoxInline {
  require(dw == 8)
  require(cl == 2048)
  class MirrorSRAMIO extends Bundle{
      val addrr  = Input(UInt(11.W))
      val addrw  = Input(UInt(11.W))

      val dataw = Input( UInt(8.W) )
      val datar = Output( UInt(8.W) )
      val enw   = Input(Bool())
      val enr   = Input(Bool())

      val clockr = Input(Bool())
      val clockw = Input(Bool())

  }
  val io: MirrorSRAMIO = IO(new MirrorSRAMIO)

 setInline("MirrorSRAM.v",
              """
      | module MirrorSRAM(
      |  	input [7:0]  dataw,
      |  	input [10:0] addrw,
      |  	input enw,
      |  
      |  	output [7:0] datar,
      |  	input [10:0] addrr,
      |  	input enr,
      |  
      |  	input clockr,
      |   input clockw
      |  );
      |  
      |  	reg [7:0] ram[0:2047];
      |  	reg [7:0] data_r_reg;
      |  
      |  			always @(posedge clockw) begin
      |  				if(enw) begin
      |  					ram[addrw] <= #1 dataw;					
      |  				end
      |       end
      |  
      |       always @(posedge clockr) begin
      |  				if(enr) begin
      |  					data_r_reg <= #1 ram[addrr];
      |  				end
      |  			end
      |  
      |  	assign datar = data_r_reg;
      |  
      |  initial begin
      |  	for ( integer i = 0; i < 2048; i = i + 1 ) begin
      |  		ram[i] = $random;
      |  	end
      |  
      |  	data_r_reg = $random;
      |  end
      |   
      |endmodule
    """.stripMargin)
}




class MirrorSRAMDown() extends BlackBox with HasBlackBoxInline {
  class MirrorSRAMDownIO extends Bundle{
      val addrr  = Input(UInt(10.W))
      val addrw  = Input(UInt(9.W))

      val dataw = Input( UInt(16.W) )
      val datar = Output( UInt(8.W) )
      val enw   = Input(Bool())
      val enr   = Input(Bool())

      val clockr = Input(Bool())
      val clockw = Input(Bool())

  }
  val io: MirrorSRAMDownIO = IO(new MirrorSRAMDownIO)

 setInline("MirrorSRAMDown.v",
              """
      | module MirrorSRAMDown(
      |  	input [15:0] dataw,
      |  	input [8:0] addrw,
      |  	input enw,
      |  
      |  	output [7:0] datar,
      |  	input [9:0] addrr,
      |  	input enr,
      |  
      |  	input clockr,
      |   input clockw
      |  );
      |  
      |  	reg [15:0] ram[0:511];
      |  	reg [7:0] data_r_reg;
      |  
      |  			always @(posedge clockw) begin
      |  				if(enw) begin
      |  					ram[addrw] <= #1 dataw;					
      |  				end
      |       end
      |  
      |       always @(posedge clockr) begin
      |  				if(enr) begin
      |  					data_r_reg <= #1 addrr[0] ? ram[addrr[9:1]][15:8] : ram[addrr[9:1]][7:0];
      |  				end
      |  			end
      |  
      |  	assign datar = data_r_reg;
      |  
      |  initial begin
      |  	for ( integer i = 0; i < 512; i = i + 1 ) begin
      |  		ram[i] = $random;
      |  	end
      |  
      |  	data_r_reg = $random;
      |  end
      |   
      |endmodule
    """.stripMargin)
}


class MirrorSRAMUp extends BlackBox with HasBlackBoxInline {

  class MirrorSRAMUpIO extends Bundle{
      val addrr  = Input(UInt(9.W))
      val addrw  = Input(UInt(10.W))

      val dataw = Input( UInt(8.W) )
      val datar = Output( UInt(16.W) )
      val enw   = Input(Bool())
      val enr   = Input(Bool())

      val clockr = Input(Bool())
      val clockw = Input(Bool())

  }
  val io: MirrorSRAMUpIO = IO(new MirrorSRAMUpIO)

 setInline("MirrorSRAMUp.v",
              """
      | module MirrorSRAMUp(
      |  	input [7:0]  dataw,
      |  	input [9:0] addrw,
      |  	input enw,
      |  
      |  	output [15:0] datar,
      |  	input [8:0] addrr,
      |  	input enr,
      |  
      |  	input clockr,
      |   input clockw
      |  );
      |  
      |  	reg [15:0] ram[0:511];
      |  	reg [15:0] data_r_reg;
      |  
  		|   always @(posedge clockw) begin
  		|     if(enw) begin
      |       if( addrw[0] ) begin
      |         ram[addrw[9:1]][15:8] <= #1 dataw;
      |       end else begin
      |         ram[addrw[9:1]][7:0]  <= #1 dataw;
      |       end				
  		|   	end
      |   end
      |  
      |       always @(posedge clockr) begin
      |  				if(enr) begin
      |  					data_r_reg <= #1 ram[addrr];
      |  				end
      |  			end
      |  
      |  	assign datar = data_r_reg;
      |  
      |  initial begin
      |  	for ( integer i = 0; i < 512; i = i + 1 ) begin
      |  		ram[i] = $random;
      |  	end
      |  
      |  	data_r_reg = $random;
      |  end
      |   
      |endmodule
    """.stripMargin)
}