diff options
Diffstat (limited to 'techlibs/ecp5/cells_sim.v')
| -rw-r--r-- | techlibs/ecp5/cells_sim.v | 190 |
1 files changed, 30 insertions, 160 deletions
diff --git a/techlibs/ecp5/cells_sim.v b/techlibs/ecp5/cells_sim.v index 95f612cfa..950d12c91 100644 --- a/techlibs/ecp5/cells_sim.v +++ b/techlibs/ecp5/cells_sim.v @@ -413,177 +413,47 @@ endmodule // --------------------------------------- -module TRELLIS_SLICE( - input A0, B0, C0, D0, - input A1, B1, C1, D1, - input M0, M1, - input FCI, FXA, FXB, - - input CLK, LSR, CE, - input DI0, DI1, - - input WD0, WD1, +module TRELLIS_COMB( + input A, B, C, D, M, + input FCI, F1, FXA, FXB, + input WD, input WAD0, WAD1, WAD2, WAD3, input WRE, WCK, - - output F0, Q0, - output F1, Q1, - output FCO, OFX0, OFX1, - - output WDO0, WDO1, WDO2, WDO3, - output WADO0, WADO1, WADO2, WADO3 + output F, FCO, OFX ); - parameter MODE = "LOGIC"; - parameter GSR = "ENABLED"; - parameter SRMODE = "LSR_OVER_CE"; - parameter [127:0] CEMUX = "1"; - parameter CLKMUX = "CLK"; - parameter LSRMUX = "LSR"; - parameter LUT0_INITVAL = 16'h0000; - parameter LUT1_INITVAL = 16'h0000; - parameter REG0_SD = "0"; - parameter REG1_SD = "0"; - parameter REG0_REGSET = "RESET"; - parameter REG1_REGSET = "RESET"; - parameter REG0_LSRMODE = "LSR"; - parameter REG1_LSRMODE = "LSR"; - parameter [127:0] CCU2_INJECT1_0 = "NO"; - parameter [127:0] CCU2_INJECT1_1 = "NO"; + parameter INITVAL = 16'h0; + parameter CCU2_INJECT1 = "NO"; parameter WREMUX = "WRE"; - parameter WCKMUX = "WCK"; - - parameter A0MUX = "A0"; - parameter A1MUX = "A1"; - parameter B0MUX = "B0"; - parameter B1MUX = "B1"; - parameter C0MUX = "C0"; - parameter C1MUX = "C1"; - parameter D0MUX = "D0"; - parameter D1MUX = "D1"; - - wire A0m, B0m, C0m, D0m; - wire A1m, B1m, C1m, D1m; + parameter IS_Z1 = 1'b0; generate - if (A0MUX == "1") assign A0m = 1'b1; else assign A0m = A0; - if (B0MUX == "1") assign B0m = 1'b1; else assign B0m = B0; - if (C0MUX == "1") assign C0m = 1'b1; else assign C0m = C0; - if (D0MUX == "1") assign D0m = 1'b1; else assign D0m = D0; - if (A1MUX == "1") assign A1m = 1'b1; else assign A1m = A1; - if (B1MUX == "1") assign B1m = 1'b1; else assign B1m = B1; - if (C1MUX == "1") assign C1m = 1'b1; else assign C1m = C1; - if (D1MUX == "1") assign D1m = 1'b1; else assign D1m = D1; - - endgenerate - - function [15:0] permute_initval; - input [15:0] initval; - integer i; - begin - for (i = 0; i < 16; i = i + 1) begin - permute_initval[{i[0], i[2], i[1], i[3]}] = initval[i]; - end - end - endfunction - - generate - if (MODE == "LOGIC") begin - // LUTs - LUT4 #( - .INIT(LUT0_INITVAL) - ) lut4_0 ( - .A(A0m), .B(B0m), .C(C0m), .D(D0m), - .Z(F0) - ); - LUT4 #( - .INIT(LUT1_INITVAL) - ) lut4_1 ( - .A(A1m), .B(B1m), .C(C1m), .D(D1m), - .Z(F1) - ); - // LUT expansion muxes - PFUMX lut5_mux (.ALUT(F1), .BLUT(F0), .C0(M0), .Z(OFX0)); - L6MUX21 lutx_mux (.D0(FXA), .D1(FXB), .SD(M1), .Z(OFX1)); - end else if (MODE == "CCU2") begin - CCU2C #( - .INIT0(LUT0_INITVAL), - .INIT1(LUT1_INITVAL), - .INJECT1_0(CCU2_INJECT1_0), - .INJECT1_1(CCU2_INJECT1_1) - ) ccu2c_i ( - .CIN(FCI), - .A0(A0m), .B0(B0m), .C0(C0m), .D0(D0m), - .A1(A1m), .B1(B1m), .C1(C1m), .D1(D1m), - .S0(F0), .S1(F1), - .COUT(FCO) - ); - end else if (MODE == "RAMW") begin - assign WDO0 = C1m; - assign WDO1 = A1m; - assign WDO2 = D1m; - assign WDO3 = B1m; - assign WADO0 = D0m; - assign WADO1 = B0m; - assign WADO2 = C0m; - assign WADO3 = A0m; - end else if (MODE == "DPRAM") begin - TRELLIS_RAM16X2 #( - .INITVAL_0(permute_initval(LUT0_INITVAL)), - .INITVAL_1(permute_initval(LUT1_INITVAL)), - .WREMUX(WREMUX) - ) ram_i ( - .DI0(WD0), .DI1(WD1), - .WAD0(WAD0), .WAD1(WAD1), .WAD2(WAD2), .WAD3(WAD3), - .WRE(WRE), .WCK(WCK), - .RAD0(D0m), .RAD1(B0m), .RAD2(C0m), .RAD3(A0m), - .DO0(F0), .DO1(F1) - ); - // TODO: confirm RAD and INITVAL ordering - // DPRAM mode contract? -`ifdef FORMAL - always @(*) begin - assert(A0m==A1m); - assert(B0m==B1m); - assert(C0m==C1m); - assert(D0m==D1m); - end -`endif + if (MODE == "LOGIC") begin: mode_logic + LUT4 #(.INIT(INITVAL)) lut4 (.A(A), .B(B), .C(C), .D(D), .Z(F)); + end else if (MODE == "CCU2") begin: mode_ccu2 + wire l4o, l2o; + LUT4 #(.INIT(INITVAL)) lut4_0(.A(A), .B(B), .C(C), .D(D), .Z(l4o)); + LUT2 #(.INIT(INITVAL[3:0])) lut2_0(.A(A), .B(B), .Z(l2o)); + wire gated_cin_0 = (CCU2_INJECT1 == "YES") ? 1'b0 : FCI; + assign F = l4o ^ gated_cin_0; + wire gated_lut2_0 = (CCU2_INJECT1 == "YES") ? 1'b0 : l2o; + wire FCO = (~l4o & gated_lut2_0) | (l4o & FCI); + end else if (MODE == "DPRAM") begin: mode_dpram + reg [15:0] ram = INITVAL; + always @(posedge WCK) + if (WRE) + ram[{WAD3, WAD2, WAD1, WAD0}] <= WD; + assign F = ram[{A, C, B, D}]; end else begin - ERROR_UNKNOWN_SLICE_MODE error(); + $error("unsupported COMB mode %s", MODE); end + + if (IS_Z1) + L6MUX21 lutx_mux (.D0(FXA), .D1(FXB), .SD(M), .Z(OFX)); + else + PFUMX lut5_mux (.ALUT(F1), .BLUT(F), .C0(M), .Z(OFX)); endgenerate - // FF input selection muxes - wire muxdi0 = (REG0_SD == "1") ? DI0 : M0; - wire muxdi1 = (REG1_SD == "1") ? DI1 : M1; - // Flipflops - TRELLIS_FF #( - .GSR(GSR), - .CEMUX(CEMUX), - .CLKMUX(CLKMUX), - .LSRMUX(LSRMUX), - .SRMODE(SRMODE), - .REGSET(REG0_REGSET), - .LSRMODE(REG0_LSRMODE) - ) ff_0 ( - .CLK(CLK), .LSR(LSR), .CE(CE), - .DI(muxdi0), .M(M0), - .Q(Q0) - ); - TRELLIS_FF #( - .GSR(GSR), - .CEMUX(CEMUX), - .CLKMUX(CLKMUX), - .LSRMUX(LSRMUX), - .SRMODE(SRMODE), - .REGSET(REG1_REGSET), - .LSRMODE(REG1_LSRMODE) - ) ff_1 ( - .CLK(CLK), .LSR(LSR), .CE(CE), - .DI(muxdi1), .M(M1), - .Q(Q1) - ); endmodule (* blackbox *) |