Subversion Repositories m32632

// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

//

// This file is part of the M32632 project

// http://opencores.org/project,m32632

//

//      Filename:       DATENPFAD.v

//      Version:        2.0

//      History:        1.1 bug fix of 7 October 2015

//                              1.0 first release of 30 Mai 2015

//      Date:           14 August 2016

//

// Copyright (C) 2016 Udo Moeller

// 

// This source file may be used and distributed without 

// restriction provided that this copyright statement is not 

// removed from the file and that any derivative work contains 

// the original copyright notice and the associated disclaimer.

// 

// This source file is free software; you can redistribute it 

// and/or modify it under the terms of the GNU Lesser General 

// Public License as published by the Free Software Foundation;

// either version 2.1 of the License, or (at your option) any 

// later version. 

// 

// This source is distributed in the hope that it will be 

// useful, but WITHOUT ANY WARRANTY; without even the implied 

// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 

// PURPOSE. See the GNU Lesser General Public License for more 

// details. 

// 

// You should have received a copy of the GNU Lesser General 

// Public License along with this source; if not, download it 

// from http://www.opencores.org/lgpl.shtml 

// 

// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

//

//      Modules contained in this file:

//      DATENPFAD       the data path of M32632

//

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

module DATENPFAD( BCLK, BRESET, WREN, IO_READY, LD_DIN, LD_IMME, WR_REG, IC_USER, ACC_FELD, ACC_STAT, DIN, DISP, IC_TEX,

                                  IMME_Q, INFO_AU, LD_OUT, DETOIP, MMU_UPDATE, OPER, PC_ARCHI, PC_ICACHE, RDAA, RDAB, START, WMASKE,

                                  WRADR, DONE, Y_INIT, WRITE_OUT, READ_OUT, ZTEST, RMW, QWATWO, ACC_DONE, REG_OUT, PTB_SEL, PTB_WR, ACB_ZERO,

                                  ABORT, SAVE_PC, CFG, CINV, DP_Q, IVAR, MCR, PACKET, PC_NEW, PSR, SIZE, STRING, TRAPS, VADR, RWVFLAG,

                                  DBG_HIT, DBG_IN, COP_GO, COP_OP, COP_IN, COP_DONE, COP_OUT);

input                   BCLK;

input                   BRESET;

input                   WREN;           // write enable of the register file

input                   IO_READY;

input                   LD_DIN;

input                   LD_IMME;

input                   WR_REG;         // write signal for the DP_FPU

input                   IC_USER;

input                   RWVFLAG;

input   [14:0]   ACC_FELD;

input    [5:0]   ACC_STAT;

input   [31:0]   DIN;

input   [31:0]   DISP;

input    [2:0]   IC_TEX;

input   [31:0]   IMME_Q;

input    [6:0]   INFO_AU;

input    [1:0]   LD_OUT;

input   [12:0]   DETOIP;

input    [1:0]   MMU_UPDATE;

input   [10:0]   OPER;

input   [31:0]   PC_ARCHI;

input   [31:0]   PC_ICACHE;

input    [7:0]   RDAA;

input    [7:0]   RDAB;

input    [1:0]   START;

input    [1:0]   WMASKE;

input    [5:0]   WRADR;

input                   DBG_HIT;

input                   COP_DONE;

input   [23:0]   COP_OP;

input   [63:0]   COP_IN;

output                  DONE;

output                  Y_INIT;

output                  WRITE_OUT;

output                  READ_OUT;

output                  ZTEST;

output                  RMW;

output                  QWATWO;

output                  ACC_DONE;

output                  REG_OUT;

output                  PTB_SEL;

output                  PTB_WR;

output reg              ACB_ZERO;

output                  ABORT;

output                  SAVE_PC;

output  [12:0]   CFG;

output   [3:0]   CINV;

output  [63:0]   DP_Q;

output   [1:0]   IVAR;

output   [3:0]   MCR;

output   [3:0]   PACKET;

output  [31:0]   PC_NEW;

output  [11:0]   PSR;

output   [1:0]   SIZE;

output   [4:0]   STRING;

output   [5:0]   TRAPS;

output  [31:0]   VADR;

output  [40:2]  DBG_IN;

output                  COP_GO;

output [127:0]   COP_OUT;

reg     [31:0]   high_dq;

reg             [31:0]   IMMREG,MEMREG;

reg             [31:0]   BYDIN;          // the bypass register

reg                             LDIMR;

wire     [2:0]   BITSEL;

wire     [1:0]   BWD;

wire                    CLR_LSB;

wire    [31:0]   ERGEBNIS;       // the result bus

wire                    FL;

wire    [31:0]   FSR;

wire    [63:0]   MRESULT;

wire     [7:0]   OPCODE;

wire                    SELI_A;

wire                    SELI_B;

wire     [2:0]   SP_CMP;

wire    [31:0]   SRC1;           // the bus for the Source 1 operand

wire    [31:0]   SRC2;           // the bus for the Source 2 operand

wire    [31:0]   OUT_I;

wire     [4:0]   TT_DP;

wire                    TWREN;          // active if FPU Trap occurs

wire                    UP_DP;

wire                    WRADR_0;

wire                    WREN_L,WREN_LX;

wire                    LD_FSR;

wire                    UP_SP;

wire     [4:0]   TT_SP;

wire    [31:0]   addr_i;

wire     [2:0]   DP_CMP;

wire    [31:0]   DP_OUT;

wire    [31:0]   SFP_DAT;

wire     [6:0]   BMCODE;

wire    [31:0]   OUT_A,OUT_B;

wire                    SP_MUX;

wire    [31:0]   I_OUT;

wire    [31:0]   FP_OUT;

wire                    DOWR;

wire    [31:0]   DEST1,DEST2;

wire                    ENWR;

wire     [3:0]   OVF_BCD;

wire     [3:0]   DSR;

wire                    acb_zero_i;

wire    [31:0]   BMASKE;

assign  FL         = OPER[10];

assign  BWD        = OPER[9:8];

assign  OPCODE = OPER[7:0];

assign  ERGEBNIS = SP_MUX ? FP_OUT : I_OUT;

assign  WRADR_0 = WRADR[0] ^ CLR_LSB;

assign  ENWR = WREN_L | WREN;

assign  DOWR = ENWR & TWREN;

assign  WREN_L = WREN_LX & ~TRAPS[0];

assign  DP_Q[63:32] = high_dq;

assign  PC_NEW = SRC1;

always @(posedge BCLK) if (LD_OUT[1] || WREN)    ACB_ZERO <= acb_zero_i;

always @(posedge BCLK) if (LD_OUT[1]) high_dq <= ERGEBNIS;

always @(posedge BCLK)

        if (LD_DIN)

                begin

                        IMMREG <= IMME_Q;

                        MEMREG <= DIN;

                        LDIMR  <= LD_IMME;

                end

assign OUT_I = LDIMR ? IMMREG : MEMREG; // old solution had the multiplexor before the register

always @(posedge BCLK) if (RDAA[7]) BYDIN <= ERGEBNIS;

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// Register Set 1 => SRC1

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

REGISTER        REG_SET_A(

        .BCLK(BCLK),

        .ENWR(ENWR),

        .DOWR(DOWR),

        .DIN(ERGEBNIS),

        .BYDIN(BYDIN),

        .RADR(RDAA),

        .WADR({WRADR[5:1],WRADR_0}),

        .WMASKE(WMASKE),

        .SELI(SELI_A),

        .DOUT(OUT_A));

assign SRC1 = SELI_A ? OUT_I : OUT_A;

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// Register Set 2 => SRC2

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

REGISTER        REG_SET_B(

        .BCLK(BCLK),

        .ENWR(ENWR),

        .DOWR(DOWR),

        .DIN(ERGEBNIS),

        .BYDIN(BYDIN),

        .RADR(RDAB),

        .WADR({WRADR[5:1],WRADR_0}),

        .WMASKE(WMASKE),

        .SELI(SELI_B),

        .DOUT(OUT_B));

assign SRC2 = SELI_B ? OUT_I : OUT_B;

MULFILTER       M_FILTER(

        .FLOAT(OPCODE[2]),

        .BWD(BWD),

        .SRC1(SRC1),

        .SRC2(SRC2),

        .DEST1(DEST1),

        .DEST2(DEST2));

SIGNMUL         S_MULTI(                // signed multiplier 32 * 32 bits = 64 bits

        .dataa(DEST1),

        .datab(DEST2),

        .result(MRESULT));

BITMASK  BITM_U(

        .AA(BMCODE),

        .DOUT(BMASKE));

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// The integer data path

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

I_PFAD  GANZ_U(

        .FL(FL),

        .BRESET(BRESET),

        .BCLK(BCLK),

        .WREN(WREN),

        .LD_OUT(LD_OUT[1]),

        .ADDR(addr_i),

        .BITSEL(BITSEL),

        .BMASKE(BMASKE),

        .BWD(BWD),

        .DP_CMP(DP_CMP),

        .DP_OUT(DP_OUT),

        .FSR(FSR),

        .DETOIP(DETOIP[11:0]),

        .MRESULT(MRESULT),

        .OPCODE(OPCODE),

        .RDAA(RDAA),

        .SFP_DAT(SFP_DAT),

        .SP_CMP(SP_CMP),

        .SRC1(SRC1),

        .SRC2(SRC2),

        .WRADR(WRADR),

        .DSR(DSR),

        .OV_FLAG(TRAPS[2]),

        .ACB_ZERO(acb_zero_i),

        .BMCODE(BMCODE),

        .I_OUT(I_OUT),

        .PSR(PSR),

        .STRING(STRING),

        .OVF_BCD(OVF_BCD),

        .DISP(DISP[4:0]),

        .RWVFLAG(RWVFLAG));

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// The address unit

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

ADDR_UNIT       ADDR_U(

        .BCLK(BCLK),

        .BRESET(BRESET),

        .IO_READY(IO_READY),

        .READ(ACC_FELD[11]),

        .WRITE(ACC_FELD[10]),

        .CLRMSW(ACC_FELD[2]),

        .FULLACC(ACC_FELD[8]),

        .POST(ACC_FELD[3]),

        .DISP_OK(INFO_AU[0]),

        .LDEA(ACC_FELD[9]),

        .NEWACC(ACC_FELD[14]),

        .FPU_TRAP(TRAPS[0]),

        .ADIVAR(INFO_AU[2]),

        .RWVAL_1(INFO_AU[3]),

        .ABO_STAT({INFO_AU[1],IC_USER}),

        .ACC_STAT(ACC_STAT),

        .ASIZE(ACC_FELD[13:12]),

        .BWD(BWD),

        .DISP(DISP),

        .IC_TEX(IC_TEX),

        .INDEX(ACC_FELD[7:4]),

        .MMU_UPDATE(MMU_UPDATE),

        .PC_ARCHI(PC_ARCHI),

        .PC_ICACHE(PC_ICACHE),

        .SRC1(SRC1),

        .SRC2(SRC2),

        .SRC2SEL(ACC_FELD[1:0]),

        .REG_OUT(REG_OUT),

        .ACC_DONE(ACC_DONE),

        .READ_OUT(READ_OUT),

        .WRITE_OUT(WRITE_OUT),

        .ABORT(ABORT),

        .ADDR(addr_i),

        .BITSEL(BITSEL),

        .PACKET(PACKET),

        .SIZE(SIZE),

        .VADR(VADR),

        .ZTEST(ZTEST),

        .RMW(RMW),

        .QWATWO(QWATWO),

        .OP_RMW(INFO_AU[4]),

        .PHASE_17(INFO_AU[5]),

        .NO_TRAP(INFO_AU[6]) );

CONFIG_REGS     CFG_DBG(

        .BCLK(BCLK),

        .BRESET(BRESET),

        .WREN(WREN),

        .LD_OUT(LD_OUT[1]),

        .OPCODE(OPCODE),

        .SRC1(SRC1),

        .WRADR(WRADR),

        .PTB_WR(PTB_WR),

        .PTB_SEL(PTB_SEL),

        .CFG(CFG),

        .CINV(CINV),

        .IVAR(IVAR),

        .Y_INIT(Y_INIT),

        .MCR(MCR),

        .DBG_TRAPS(TRAPS[5:3]),

        .PC_ARCHI(PC_ARCHI),

        .DSR(DSR),

        .USER(PSR[8]),

        .PCMATCH(DETOIP[12]),

        .DBG_IN(DBG_IN),

        .DBG_HIT(DBG_HIT),

        .READ(READ_OUT) );

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// The long operation unit

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

DP_FPU  DOUBLE_U(

        .BCLK(BCLK),

        .FL(FL),

        .BRESET(BRESET),

        .LD_OUT(LD_OUT),

        .WR_REG(WR_REG),

        .BWD(BWD),

        .FSR(FSR[8:3]),

        .OPCODE(OPCODE),

        .SRC1(SRC1),

        .SRC2(SRC2),

        .START(START),

        .DONE(DONE),

        .UP_DP(UP_DP),

        .WREN_L(WREN_LX),

        .CLR_LSB(CLR_LSB),

        .DVZ_TRAP(TRAPS[1]),

        .DP_CMP(DP_CMP),

        .DP_OUT(DP_OUT),

        .DP_Q(DP_Q[31:0]),

        .TT_DP(TT_DP),

        .CY_IN(PSR[0]),

        .OVF_BCD(OVF_BCD),

        .COP_DONE(COP_DONE),

        .COP_OP(COP_OP),

        .COP_IN(COP_IN),

        .COP_GO(COP_GO),

        .COP_OUT(COP_OUT));

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// The single precision floating point unit

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

SP_FPU  SINGLE_U(

        .FL(FL),

        .BCLK(BCLK),

        .BWD(BWD),

        .FSR(FSR[8:3]),

        .MRESULT(MRESULT[47:0]),

        .OPCODE(OPCODE),

        .SRC1(SRC1),

        .SRC2(SRC2),

        .LD_FSR(LD_FSR),

        .SP_MUX(SP_MUX),

        .UP_SP(UP_SP),

        .FP_OUT(FP_OUT),

        .I_OUT(SFP_DAT),

        .SP_CMP(SP_CMP),

        .TT_SP(TT_SP),

        .START(START[1]) );

FP_STAT_REG     FPS_REG(

        .BCLK(BCLK),

        .BRESET(BRESET),

        .LFSR(LD_FSR),

        .WREN(ENWR),

        .WRADR(WRADR[5:4]),

        .UP_DP(UP_DP),

        .UP_SP(UP_SP),

        .DIN(SRC1[16:0]),

        .TT_DP(TT_DP),

        .TT_SP(TT_SP),

        .FPU_TRAP(TRAPS[0]),

        .TWREN(TWREN),

        .SAVE_PC(SAVE_PC),

        .FSR(FSR));

endmodule