assign G = 0;
endmodule
-module IBUF(output O, input I);
+module IBUF(
+ output O,
+ (* iopad_external_pin *)
+ input I);
parameter IOSTANDARD = "default";
parameter IBUF_LOW_PWR = 0;
assign O = I;
endmodule
-module OBUF(output O, input I);
+module OBUF(
+ (* iopad_external_pin *)
+ output O,
+ input I);
parameter IOSTANDARD = "default";
parameter DRIVE = 12;
parameter SLEW = "SLOW";
assign O = I;
endmodule
-module BUFG(output O, input I);
+module BUFG(
+ (* clkbuf_driver *)
+ output O,
+ input I);
+
assign O = I;
endmodule
module BUFGCTRL(
+ (* clkbuf_driver *)
output O,
input I0, input I1,
input S0, input S1,
endmodule
-module BUFHCE(output O, input I, input CE);
+module BUFHCE(
+ (* clkbuf_driver *)
+ output O,
+ input I,
+ input CE);
parameter [0:0] INIT_OUT = 1'b0;
parameter CE_TYPE = "SYNC";
assign O = S ? I1 : I0;
endmodule
-`ifdef _ABC
-(* abc_box_id = 3, lib_whitebox *)
-module \$__XILINX_MUXF78 (output O, input I0, I1, I2, I3, S0, S1);
- assign O = S1 ? (S0 ? I3 : I2)
- : (S0 ? I1 : I0);
-endmodule
-`endif
-
module XORCY(output O, input CI, LI);
assign O = CI ^ LI;
endmodule
-(* abc_box_id = 4, abc_carry="CI,CO", lib_whitebox *)
-module CARRY4(output [3:0] CO, O, input CI, CYINIT, input [3:0] DI, S);
+(* abc_box_id = 4, lib_whitebox *)
+module CARRY4(
+ (* abc_carry *)
+ output [3:0] CO,
+ output [3:0] O,
+ (* abc_carry *)
+ input CI,
+ input CYINIT,
+ input [3:0] DI, S
+);
assign O = S ^ {CO[2:0], CI | CYINIT};
assign CO[0] = S[0] ? CI | CYINIT : DI[0];
assign CO[1] = S[1] ? CO[0] : DI[1];
`endif
-module FDRE (output reg Q, input C, CE, D, R);
+// Max delay from: https://github.com/SymbiFlow/prjxray-db/blob/34ea6eb08a63d21ec16264ad37a0a7b142ff6031/artix7/timings/CLBLL_L.sdf#L238-L250
+
+module FDRE (
+ (* abc_arrival=303 *)
+ output reg Q,
+ (* clkbuf_sink *)
+ input C,
+ input CE, D, R
+);
parameter [0:0] INIT = 1'b0;
parameter [0:0] IS_C_INVERTED = 1'b0;
parameter [0:0] IS_D_INVERTED = 1'b0;
endcase endgenerate
endmodule
-module FDSE (output reg Q, input C, CE, D, S);
+module FDSE (
+ (* abc_arrival=303 *)
+ output reg Q,
+ (* clkbuf_sink *)
+ input C,
+ input CE, D, S
+);
parameter [0:0] INIT = 1'b1;
parameter [0:0] IS_C_INVERTED = 1'b0;
parameter [0:0] IS_D_INVERTED = 1'b0;
endcase endgenerate
endmodule
-module FDCE (output reg Q, input C, CE, D, CLR);
+module FDCE (
+ (* abc_arrival=303 *)
+ output reg Q,
+ (* clkbuf_sink *)
+ input C,
+ input CE, D, CLR
+);
parameter [0:0] INIT = 1'b0;
parameter [0:0] IS_C_INVERTED = 1'b0;
parameter [0:0] IS_D_INVERTED = 1'b0;
endcase endgenerate
endmodule
-module FDPE (output reg Q, input C, CE, D, PRE);
+module FDPE (
+ (* abc_arrival=303 *)
+ output reg Q,
+ (* clkbuf_sink *)
+ input C,
+ input CE, D, PRE
+);
parameter [0:0] INIT = 1'b1;
parameter [0:0] IS_C_INVERTED = 1'b0;
parameter [0:0] IS_D_INVERTED = 1'b0;
endcase endgenerate
endmodule
-module FDRE_1 (output reg Q, input C, CE, D, R);
+module FDRE_1 (
+ (* abc_arrival=303 *)
+ output reg Q,
+ (* clkbuf_sink *)
+ input C,
+ input CE, D, R
+);
parameter [0:0] INIT = 1'b0;
initial Q <= INIT;
always @(negedge C) if (R) Q <= 1'b0; else if(CE) Q <= D;
endmodule
-module FDSE_1 (output reg Q, input C, CE, D, S);
+module FDSE_1 (
+ (* abc_arrival=303 *)
+ output reg Q,
+ (* clkbuf_sink *)
+ input C,
+ input CE, D, S
+);
parameter [0:0] INIT = 1'b1;
initial Q <= INIT;
always @(negedge C) if (S) Q <= 1'b1; else if(CE) Q <= D;
endmodule
-module FDCE_1 (output reg Q, input C, CE, D, CLR);
+module FDCE_1 (
+ (* abc_arrival=303 *)
+ output reg Q,
+ (* clkbuf_sink *)
+ input C,
+ input CE, D, CLR
+);
parameter [0:0] INIT = 1'b0;
initial Q <= INIT;
always @(negedge C, posedge CLR) if (CLR) Q <= 1'b0; else if (CE) Q <= D;
endmodule
-module FDPE_1 (output reg Q, input C, CE, D, PRE);
+module FDPE_1 (
+ (* abc_arrival=303 *)
+ output reg Q,
+ (* clkbuf_sink *)
+ input C,
+ input CE, D, PRE
+);
parameter [0:0] INIT = 1'b1;
initial Q <= INIT;
always @(negedge C, posedge PRE) if (PRE) Q <= 1'b1; else if (CE) Q <= D;
endmodule
-(* abc_box_id = 5, abc_scc_break="D,WE" *)
module RAM32X1D (
+ // Max delay from: https://github.com/SymbiFlow/prjxray-db/blob/34ea6eb08a63d21ec16264ad37a0a7b142ff6031/artix7/timings/CLBLM_R.sdf#L957
+ (* abc_arrival=1153 *)
output DPO, SPO,
- input D, WCLK, WE,
+ input D,
+ (* clkbuf_sink *)
+ input WCLK,
+ input WE,
input A0, A1, A2, A3, A4,
input DPRA0, DPRA1, DPRA2, DPRA3, DPRA4
);
always @(posedge clk) if (WE) mem[a] <= D;
endmodule
-(* abc_box_id = 6, abc_scc_break="D,WE" *)
module RAM64X1D (
+ // Max delay from: https://github.com/SymbiFlow/prjxray-db/blob/34ea6eb08a63d21ec16264ad37a0a7b142ff6031/artix7/timings/CLBLM_R.sdf#L957
+ (* abc_arrival=1153 *)
output DPO, SPO,
- input D, WCLK, WE,
+ input D,
+ (* clkbuf_sink *)
+ input WCLK,
+ input WE,
input A0, A1, A2, A3, A4, A5,
input DPRA0, DPRA1, DPRA2, DPRA3, DPRA4, DPRA5
);
always @(posedge clk) if (WE) mem[a] <= D;
endmodule
-(* abc_box_id = 7, abc_scc_break="D,WE" *)
module RAM128X1D (
- output DPO, SPO,
- input D, WCLK, WE,
+ // Max delay from: https://github.com/SymbiFlow/prjxray-db/blob/34ea6eb08a63d21ec16264ad37a0a7b142ff6031/artix7/timings/CLBLM_R.sdf#L957
+ (* abc_arrival=1153 *)
+ output DPO, SPO,
+ input D,
+ (* clkbuf_sink *)
+ input WCLK,
+ input WE,
input [6:0] A, DPRA
);
parameter INIT = 128'h0;
endmodule
module SRL16E (
+ // Max delay from: https://github.com/SymbiFlow/prjxray-db/blob/34ea6eb08a63d21ec16264ad37a0a7b142ff6031/artix7/timings/CLBLM_R.sdf#L904-L905
+ (* abc_arrival=1472 *)
output Q,
- input A0, A1, A2, A3, CE, CLK, D
+ input A0, A1, A2, A3, CE,
+ (* clkbuf_sink *)
+ input CLK,
+ input D
);
parameter [15:0] INIT = 16'h0000;
parameter [0:0] IS_CLK_INVERTED = 1'b0;
always @(negedge CLK) if (CE) r <= { r[14:0], D };
end
else
- always @(posedge CLK) if (CE) r <= { r[14:0], D };
+ always @(posedge CLK) if (CE) r <= { r[14:0], D };
+ endgenerate
+endmodule
+
+module SRLC16E (
+ output Q,
+ output Q15,
+ input A0, A1, A2, A3, CE,
+ (* clkbuf_sink *)
+ input CLK,
+ input D
+);
+ parameter [15:0] INIT = 16'h0000;
+ parameter [0:0] IS_CLK_INVERTED = 1'b0;
+
+ reg [15:0] r = INIT;
+ assign Q15 = r[15];
+ assign Q = r[{A3,A2,A1,A0}];
+ generate
+ if (IS_CLK_INVERTED) begin
+ always @(negedge CLK) if (CE) r <= { r[14:0], D };
+ end
+ else
+ always @(posedge CLK) if (CE) r <= { r[14:0], D };
endgenerate
endmodule
module SRLC32E (
+ // Max delay from: https://github.com/SymbiFlow/prjxray-db/blob/34ea6eb08a63d21ec16264ad37a0a7b142ff6031/artix7/timings/CLBLM_R.sdf#L904-L905
+ (* abc_arrival=1472 *)
output Q,
+ (* abc_arrival=1114 *)
output Q31,
input [4:0] A,
- input CE, CLK, D
+ input CE,
+ (* clkbuf_sink *)
+ input CLK,
+ input D
);
parameter [31:0] INIT = 32'h00000000;
parameter [0:0] IS_CLK_INVERTED = 1'b0;
module DSP48E1 (
output [29:0] ACOUT,
output [17:0] BCOUT,
- output CARRYCASCOUT,
- output [3:0] CARRYOUT,
- output MULTSIGNOUT,
+ output reg CARRYCASCOUT,
+ output reg [3:0] CARRYOUT,
+ output reg MULTSIGNOUT,
output OVERFLOW,
output reg signed [47:0] P,
- output PATTERNBDETECT,
- output PATTERNDETECT,
+ output reg PATTERNBDETECT,
+ output reg PATTERNDETECT,
output [47:0] PCOUT,
output UNDERFLOW,
input signed [29:0] A,
input CEINMODE,
input CEM,
input CEP,
- input CLK,
+ (* clkbuf_sink *) input CLK,
input [24:0] D,
input [4:0] INMODE,
input MULTSIGNIN,
initial begin
`ifdef __ICARUS__
- if (ACASCREG != 0) $fatal(1, "Unsupported ACASCREG value");
- if (ADREG != 0) $fatal(1, "Unsupported ADREG value");
- if (ALUMODEREG != 0) $fatal(1, "Unsupported ALUMODEREG value");
- if (AREG == 2) $fatal(1, "Unsupported AREG value");
if (AUTORESET_PATDET != "NO_RESET") $fatal(1, "Unsupported AUTORESET_PATDET value");
- if (A_INPUT != "DIRECT") $fatal(1, "Unsupported A_INPUT value");
- if (BCASCREG != 0) $fatal(1, "Unsupported BCASCREG value");
- if (BREG == 2) $fatal(1, "Unsupported BREG value");
- if (B_INPUT != "DIRECT") $fatal(1, "Unsupported B_INPUT value");
- if (CARRYINREG != 0) $fatal(1, "Unsupported CARRYINREG value");
- if (CARRYINSELREG != 0) $fatal(1, "Unsupported CARRYINSELREG value");
- if (CREG != 0) $fatal(1, "Unsupported CREG value");
- if (DREG != 0) $fatal(1, "Unsupported DREG value");
- if (INMODEREG != 0) $fatal(1, "Unsupported INMODEREG value");
- if (MREG != 0) $fatal(1, "Unsupported MREG value");
- if (OPMODEREG != 0) $fatal(1, "Unsupported OPMODEREG value");
- //if (PREG != 0) $fatal(1, "Unsupported PREG value");
if (SEL_MASK != "MASK") $fatal(1, "Unsupported SEL_MASK value");
if (SEL_PATTERN != "PATTERN") $fatal(1, "Unsupported SEL_PATTERN value");
- if (USE_DPORT != "FALSE") $fatal(1, "Unsupported USE_DPORT value");
- if (USE_MULT != "MULTIPLY") $fatal(1, "Unsupported USE_MULT value");
- if (USE_PATTERN_DETECT != "NO_PATDET") $fatal(1, "Unsupported USE_PATTERN_DETECT value");
- if (USE_SIMD != "ONE48") $fatal(1, "Unsupported USE_SIMD value");
+ if (USE_SIMD != "ONE48" && USE_SIMD != "TWO24" && USE_SIMD != "FOUR12") $fatal(1, "Unsupported USE_SIMD value");
if (IS_ALUMODE_INVERTED != 4'b0) $fatal(1, "Unsupported IS_ALUMODE_INVERTED value");
if (IS_CARRYIN_INVERTED != 1'b0) $fatal(1, "Unsupported IS_CARRYIN_INVERTED value");
if (IS_CLK_INVERTED != 1'b0) $fatal(1, "Unsupported IS_CLK_INVERTED value");
`endif
end
- reg signed [29:0] Ar;
- reg signed [17:0] Br;
- reg signed [47:0] Pr;
+ wire signed [29:0] A_muxed;
+ wire signed [17:0] B_muxed;
+
+ generate
+ if (A_INPUT == "CASCADE") assign A_muxed = ACIN;
+ else assign A_muxed = A;
+
+ if (B_INPUT == "CASCADE") assign B_muxed = BCIN;
+ else assign B_muxed = B;
+ endgenerate
+
+ reg signed [29:0] Ar1, Ar2;
+ reg signed [24:0] Dr;
+ reg signed [17:0] Br1, Br2;
+ reg signed [47:0] Cr;
+ reg [4:0] INMODEr = 5'b0;
+ reg [6:0] OPMODEr = 7'b0;
+ reg [3:0] ALUMODEr = 4'b0;
+ reg [2:0] CARRYINSELr = 3'b0;
+
+ generate
+ // Configurable A register
+ if (AREG == 2) begin
+ initial Ar1 = 30'b0;
+ initial Ar2 = 30'b0;
+ always @(posedge CLK)
+ if (RSTA) begin
+ Ar1 <= 30'b0;
+ Ar2 <= 30'b0;
+ end else begin
+ if (CEA1) Ar1 <= A_muxed;
+ if (CEA2) Ar2 <= Ar1;
+ end
+ end else if (AREG == 1) begin
+ //initial Ar1 = 30'b0;
+ initial Ar2 = 30'b0;
+ always @(posedge CLK)
+ if (RSTA) begin
+ Ar1 <= 30'b0;
+ Ar2 <= 30'b0;
+ end else begin
+ if (CEA1) Ar1 <= A_muxed;
+ if (CEA2) Ar2 <= A_muxed;
+ end
+ end else begin
+ always @* Ar1 <= A_muxed;
+ always @* Ar2 <= A_muxed;
+ end
+
+ // Configurable B register
+ if (BREG == 2) begin
+ initial Br1 = 25'b0;
+ initial Br2 = 25'b0;
+ always @(posedge CLK)
+ if (RSTB) begin
+ Br1 <= 18'b0;
+ Br2 <= 18'b0;
+ end else begin
+ if (CEB1) Br1 <= B_muxed;
+ if (CEB2) Br2 <= Br1;
+ end
+ end else if (BREG == 1) begin
+ //initial Br1 = 25'b0;
+ initial Br2 = 25'b0;
+ always @(posedge CLK)
+ if (RSTB) begin
+ Br1 <= 18'b0;
+ Br2 <= 18'b0;
+ end else begin
+ if (CEB1) Br1 <= B_muxed;
+ if (CEB2) Br2 <= B_muxed;
+ end
+ end else begin
+ always @* Br1 <= B_muxed;
+ always @* Br2 <= B_muxed;
+ end
+
+ // C and D registers
+ if (CREG == 1) initial Cr = 48'b0;
+ if (CREG == 1) begin always @(posedge CLK) if (RSTC) Cr <= 48'b0; else if (CEC) Cr <= C; end
+ else always @* Cr <= C;
+
+ if (CREG == 1) initial Dr = 25'b0;
+ if (DREG == 1) begin always @(posedge CLK) if (RSTD) Dr <= 25'b0; else if (CED) Dr <= D; end
+ else always @* Dr <= D;
+
+ // Control registers
+ if (INMODEREG == 1) initial INMODEr = 5'b0;
+ if (INMODEREG == 1) begin always @(posedge CLK) if (RSTINMODE) INMODEr <= 5'b0; else if (CEINMODE) INMODEr <= INMODE; end
+ else always @* INMODEr <= INMODE;
+ if (OPMODEREG == 1) initial OPMODEr = 7'b0;
+ if (OPMODEREG == 1) begin always @(posedge CLK) if (RSTCTRL) OPMODEr <= 7'b0; else if (CECTRL) OPMODEr <= OPMODE; end
+ else always @* OPMODEr <= OPMODE;
+ if (ALUMODEREG == 1) initial ALUMODEr = 4'b0;
+ if (ALUMODEREG == 1) begin always @(posedge CLK) if (RSTALUMODE) ALUMODEr <= 4'b0; else if (CEALUMODE) ALUMODEr <= ALUMODE; end
+ else always @* ALUMODEr <= ALUMODE;
+ if (CARRYINSELREG == 1) initial CARRYINSELr = 3'b0;
+ if (CARRYINSELREG == 1) begin always @(posedge CLK) if (RSTCTRL) CARRYINSELr <= 3'b0; else if (CECTRL) CARRYINSELr <= CARRYINSEL; end
+ else always @* CARRYINSELr <= CARRYINSEL;
+ endgenerate
+
+ // A and B cascade
+ generate
+ if (ACASCREG == 1 && AREG == 2) assign ACOUT = Ar1;
+ else assign ACOUT = Ar2;
+ if (BCASCREG == 1 && BREG == 2) assign BCOUT = Br1;
+ else assign BCOUT = Br2;
+ endgenerate
+
+ // A/D input selection and pre-adder
+ wire signed [29:0] Ar12_muxed = INMODEr[0] ? Ar1 : Ar2;
+ wire signed [24:0] Ar12_gated = INMODEr[1] ? 25'b0 : Ar12_muxed;
+ wire signed [24:0] Dr_gated = INMODEr[2] ? Dr : 25'b0;
+ wire signed [24:0] AD_result = INMODEr[3] ? (Dr_gated - Ar12_gated) : (Dr_gated + Ar12_gated);
+ reg signed [24:0] ADr;
+
generate
- if (AREG == 1) begin always @(posedge CLK) if (CEA2) Ar <= A; end
- else always @* Ar <= A;
- if (BREG == 1) begin always @(posedge CLK) if (CEB2) Br <= B; end
- else always @* Br <= B;
+ if (ADREG == 1) initial ADr = 25'b0;
+ if (ADREG == 1) begin always @(posedge CLK) if (RSTD) ADr <= 25'b0; else if (CEAD) ADr <= AD_result; end
+ else always @* ADr <= AD_result;
endgenerate
+ // 25x18 multiplier
+ wire signed [24:0] A_MULT;
+ wire signed [17:0] B_MULT = INMODEr[4] ? Br1 : Br2;
+ generate
+ if (USE_DPORT == "TRUE") assign A_MULT = ADr;
+ else assign A_MULT = Ar12_gated;
+ endgenerate
+
+ wire signed [42:0] M = A_MULT * B_MULT;
+ wire signed [42:0] Mx = (CARRYINSEL == 3'b010) ? 43'bx : M;
+ reg signed [42:0] Mr = 43'b0;
+
+ // Multiplier result register
+ generate
+ if (MREG == 1) begin always @(posedge CLK) if (RSTM) Mr <= 43'b0; else if (CEM) Mr <= Mx; end
+ else always @* Mr <= Mx;
+ endgenerate
+
+ wire signed [42:0] Mrx = (CARRYINSELr == 3'b010) ? 43'bx : Mr;
+
+ // X, Y and Z ALU inputs
+ reg signed [47:0] X, Y, Z;
+
always @* begin
- Pr <= {48{1'bx}};
+ // X multiplexer
+ case (OPMODEr[1:0])
+ 2'b00: X = 48'b0;
+ 2'b01: begin X = $signed(Mrx);
+`ifdef __ICARUS__
+ if (OPMODEr[3:2] != 2'b01) $fatal(1, "OPMODEr[3:2] must be 2'b01 when OPMODEr[1:0] is 2'b01");
+`endif
+ end
+ 2'b10: begin X = P;
+`ifdef __ICARUS__
+ if (PREG != 1) $fatal(1, "PREG must be 1 when OPMODEr[1:0] is 2'b10");
+`endif
+ end
+ 2'b11: X = $signed({Ar2, Br2});
+ default: X = 48'bx;
+ endcase
+
+ // Y multiplexer
+ case (OPMODEr[3:2])
+ 2'b00: Y = 48'b0;
+ 2'b01: begin Y = 48'b0; // FIXME: more accurate partial product modelling?
+`ifdef __ICARUS__
+ if (OPMODEr[1:0] != 2'b01) $fatal(1, "OPMODEr[1:0] must be 2'b01 when OPMODEr[3:2] is 2'b01");
+`endif
+ end
+ 2'b10: Y = {48{1'b1}};
+ 2'b11: Y = Cr;
+ default: Y = 48'bx;
+ endcase
+
+ // Z multiplexer
+ case (OPMODEr[6:4])
+ 3'b000: Z = 48'b0;
+ 3'b001: Z = PCIN;
+ 3'b010: begin Z = P;
`ifdef __ICARUS__
- if (INMODE != 4'b0000) $fatal(1, "Unsupported INMODE value");
- if (ALUMODE != 4'b0000) $fatal(1, "Unsupported ALUMODE value");
- if (OPMODE != 7'b000101) $fatal(1, "Unsupported OPMODE value");
- if (CARRYINSEL != 3'b000) $fatal(1, "Unsupported CARRYINSEL value");
- if (ACIN != 30'b0) $fatal(1, "Unsupported ACIN value");
- if (BCIN != 18'b0) $fatal(1, "Unsupported BCIN value");
- if (PCIN != 48'b0) $fatal(1, "Unsupported PCIN value");
- if (CARRYIN != 1'b0) $fatal(1, "Unsupported CARRYIN value");
+ if (PREG != 1) $fatal(1, "PREG must be 1 when OPMODEr[6:4] i0s 3'b010");
`endif
- Pr[42:0] <= $signed(Ar[24:0]) * Br;
+ end
+ 3'b011: Z = Cr;
+ 3'b100: begin Z = P;
+`ifdef __ICARUS__
+ if (PREG != 1) $fatal(1, "PREG must be 1 when OPMODEr[6:4] is 3'b100");
+ if (OPMODEr[3:0] != 4'b1000) $fatal(1, "OPMODEr[3:0] must be 4'b1000 when OPMODEr[6:4] i0s 3'b100");
+`endif
+ end
+ 3'b101: Z = $signed(PCIN[47:17]);
+ 3'b110: Z = $signed(P[47:17]);
+ default: Z = 48'bx;
+ endcase
+ end
+
+ // Carry in
+ wire A24_xnor_B17d = A_MULT[24] ~^ B_MULT[17];
+ reg CARRYINr = 1'b0, A24_xnor_B17 = 1'b0;
+ generate
+ if (CARRYINREG == 1) begin always @(posedge CLK) if (RSTALLCARRYIN) CARRYINr <= 1'b0; else if (CECARRYIN) CARRYINr <= CARRYIN; end
+ else always @* CARRYINr = CARRYIN;
+
+ if (MREG == 1) begin always @(posedge CLK) if (RSTALLCARRYIN) A24_xnor_B17 <= 1'b0; else if (CEM) A24_xnor_B17 <= A24_xnor_B17d; end
+ else always @* A24_xnor_B17 = A24_xnor_B17d;
+ endgenerate
+
+ reg cin_muxed;
+
+ always @(*) begin
+ case (CARRYINSELr)
+ 3'b000: cin_muxed = CARRYINr;
+ 3'b001: cin_muxed = ~PCIN[47];
+ 3'b010: cin_muxed = CARRYCASCIN;
+ 3'b011: cin_muxed = PCIN[47];
+ 3'b100: cin_muxed = CARRYCASCOUT;
+ 3'b101: cin_muxed = ~P[47];
+ 3'b110: cin_muxed = A24_xnor_B17;
+ 3'b111: cin_muxed = P[47];
+ default: cin_muxed = 1'bx;
+ endcase
end
+ wire alu_cin = (ALUMODEr[3] || ALUMODEr[2]) ? 1'b0 : cin_muxed;
+
+ // ALU core
+ wire [47:0] Z_muxinv = ALUMODEr[0] ? ~Z : Z;
+ wire [47:0] xor_xyz = X ^ Y ^ Z_muxinv;
+ wire [47:0] maj_xyz = (X & Y) | (X & Z_muxinv) | (Y & Z_muxinv);
+
+ wire [47:0] xor_xyz_muxed = ALUMODEr[3] ? maj_xyz : xor_xyz;
+ wire [47:0] maj_xyz_gated = ALUMODEr[2] ? 48'b0 : maj_xyz;
+
+ wire [48:0] maj_xyz_simd_gated;
+ wire [3:0] int_carry_in, int_carry_out, ext_carry_out;
+ wire [47:0] alu_sum;
+ assign int_carry_in[0] = 1'b0;
+ wire [3:0] carryout_reset;
+
+ generate
+ if (USE_SIMD == "FOUR12") begin
+ assign maj_xyz_simd_gated = {
+ maj_xyz_gated[47:36],
+ 1'b0, maj_xyz_gated[34:24],
+ 1'b0, maj_xyz_gated[22:12],
+ 1'b0, maj_xyz_gated[10:0],
+ alu_cin
+ };
+ assign int_carry_in[3:1] = 3'b000;
+ assign ext_carry_out = {
+ int_carry_out[3],
+ maj_xyz_gated[35] ^ int_carry_out[2],
+ maj_xyz_gated[23] ^ int_carry_out[1],
+ maj_xyz_gated[11] ^ int_carry_out[0]
+ };
+ assign carryout_reset = 4'b0000;
+ end else if (USE_SIMD == "TWO24") begin
+ assign maj_xyz_simd_gated = {
+ maj_xyz_gated[47:24],
+ 1'b0, maj_xyz_gated[22:0],
+ alu_cin
+ };
+ assign int_carry_in[3:1] = {int_carry_out[2], 1'b0, int_carry_out[0]};
+ assign ext_carry_out = {
+ int_carry_out[3],
+ 1'bx,
+ maj_xyz_gated[23] ^ int_carry_out[1],
+ 1'bx
+ };
+ assign carryout_reset = 4'b0x0x;
+ end else begin
+ assign maj_xyz_simd_gated = {maj_xyz_gated, alu_cin};
+ assign int_carry_in[3:1] = int_carry_out[2:0];
+ assign ext_carry_out = {
+ int_carry_out[3],
+ 3'bxxx
+ };
+ assign carryout_reset = 4'b0xxx;
+ end
+
+ genvar i;
+ for (i = 0; i < 4; i = i + 1)
+ assign {int_carry_out[i], alu_sum[i*12 +: 12]} = {1'b0, maj_xyz_simd_gated[i*12 +: ((i == 3) ? 13 : 12)]}
+ + xor_xyz_muxed[i*12 +: 12] + int_carry_in[i];
+ endgenerate
+
+ wire signed [47:0] Pd = ALUMODEr[1] ? ~alu_sum : alu_sum;
+ wire [3:0] CARRYOUTd = (OPMODEr[3:0] == 4'b0101 || ALUMODEr[3:2] != 2'b00) ? 4'bxxxx :
+ ((ALUMODEr[0] & ALUMODEr[1]) ? ~ext_carry_out : ext_carry_out);
+ wire CARRYCASCOUTd = ext_carry_out[3];
+ wire MULTSIGNOUTd = Mrx[42];
+
+ generate
+ if (PREG == 1) begin
+ initial P = 48'b0;
+ initial CARRYOUT = carryout_reset;
+ initial CARRYCASCOUT = 1'b0;
+ initial MULTSIGNOUT = 1'b0;
+ always @(posedge CLK)
+ if (RSTP) begin
+ P <= 48'b0;
+ CARRYOUT <= carryout_reset;
+ CARRYCASCOUT <= 1'b0;
+ MULTSIGNOUT <= 1'b0;
+ end else if (CEP) begin
+ P <= Pd;
+ CARRYOUT <= CARRYOUTd;
+ CARRYCASCOUT <= CARRYCASCOUTd;
+ MULTSIGNOUT <= MULTSIGNOUTd;
+ end
+ end else begin
+ always @* begin
+ P = Pd;
+ CARRYOUT = CARRYOUTd;
+ CARRYCASCOUT = CARRYCASCOUTd;
+ MULTSIGNOUT = MULTSIGNOUTd;
+ end
+ end
+ endgenerate
+
+ assign PCOUT = P;
+
generate
- if (PREG == 1) begin always @(posedge CLK) if (CEP) P <= Pr; end
- else always @* P <= Pr;
+ wire PATTERNDETECTd, PATTERNBDETECTd;
+
+ if (USE_PATTERN_DETECT == "PATDET") begin
+ // TODO: Support SEL_PATTERN != "PATTERN" and SEL_MASK != "MASK
+ assign PATTERNDETECTd = &(~(Pd ^ PATTERN) | MASK);
+ assign PATTERNBDETECTd = &((Pd ^ PATTERN) | MASK);
+ end else begin
+ assign PATTERNDETECTd = 1'b1;
+ assign PATTERNBDETECTd = 1'b1;
+ end
+
+ if (PREG == 1) begin
+ reg PATTERNDETECTPAST, PATTERNBDETECTPAST;
+ initial PATTERNDETECT = 1'b0;
+ initial PATTERNBDETECT = 1'b0;
+ initial PATTERNDETECTPAST = 1'b0;
+ initial PATTERNBDETECTPAST = 1'b0;
+ always @(posedge CLK)
+ if (RSTP) begin
+ PATTERNDETECT <= 1'b0;
+ PATTERNBDETECT <= 1'b0;
+ PATTERNDETECTPAST <= 1'b0;
+ PATTERNBDETECTPAST <= 1'b0;
+ end else if (CEP) begin
+ PATTERNDETECT <= PATTERNDETECTd;
+ PATTERNBDETECT <= PATTERNBDETECTd;
+ PATTERNDETECTPAST <= PATTERNDETECT;
+ PATTERNBDETECTPAST <= PATTERNBDETECT;
+ end
+ assign OVERFLOW = &{PATTERNDETECTPAST, ~PATTERNBDETECT, ~PATTERNDETECT};
+ assign UNDERFLOW = &{PATTERNBDETECTPAST, ~PATTERNBDETECT, ~PATTERNDETECT};
+ end else begin
+ always @* begin
+ PATTERNDETECT = PATTERNDETECTd;
+ PATTERNBDETECT = PATTERNBDETECTd;
+ end
+ assign OVERFLOW = 1'bx, UNDERFLOW = 1'bx;
+ end
endgenerate
endmodule
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