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-rw-r--r--techlibs/common/Makefile.inc1
-rw-r--r--techlibs/common/mul2dsp.v232
-rw-r--r--techlibs/ecp5/Makefile.inc1
-rw-r--r--techlibs/ecp5/dsp_map.v10
-rw-r--r--techlibs/ecp5/synth_ecp5.cc33
-rw-r--r--techlibs/ice40/synth_ice40.cc4
-rw-r--r--techlibs/xilinx/Makefile.inc1
-rw-r--r--techlibs/xilinx/cells_sim.v147
-rw-r--r--techlibs/xilinx/cells_xtra.v82
-rw-r--r--techlibs/xilinx/dsp_map.v40
-rw-r--r--techlibs/xilinx/synth_xilinx.cc24
11 files changed, 487 insertions, 88 deletions
diff --git a/techlibs/common/Makefile.inc b/techlibs/common/Makefile.inc
index 0e05620bc..e6d1c2f29 100644
--- a/techlibs/common/Makefile.inc
+++ b/techlibs/common/Makefile.inc
@@ -28,3 +28,4 @@ $(eval $(call add_share_file,share,techlibs/common/dff2ff.v))
$(eval $(call add_share_file,share,techlibs/common/gate2lut.v))
$(eval $(call add_share_file,share,techlibs/common/cmp2lut.v))
$(eval $(call add_share_file,share,techlibs/common/cells.lib))
+$(eval $(call add_share_file,share,techlibs/common/mul2dsp.v))
diff --git a/techlibs/common/mul2dsp.v b/techlibs/common/mul2dsp.v
new file mode 100644
index 000000000..391b395ff
--- /dev/null
+++ b/techlibs/common/mul2dsp.v
@@ -0,0 +1,232 @@
+// From Eddie Hung
+// extracted from: https://github.com/eddiehung/vtr-with-yosys/blob/vtr7-with-yosys/vtr_flow/misc/yosys_models.v#L220
+// revised by Andre DeHon
+// further revised by David Shah
+`ifndef DSP_A_MAXWIDTH
+$error("Macro DSP_A_MAXWIDTH must be defined");
+`endif
+`ifndef DSP_B_MAXWIDTH
+$error("Macro DSP_B_MAXWIDTH must be defined");
+`endif
+`ifndef DSP_SIGNEDONLY
+`define DSP_SIGNEDONLY 0
+`endif
+
+`ifndef DSP_NAME
+$error("Macro DSP_NAME must be defined");
+`endif
+
+`define MAX(a,b) (a > b ? a : b)
+`define MIN(a,b) (a < b ? a : b)
+
+module \$mul (A, B, Y);
+ parameter A_SIGNED = 0;
+ parameter B_SIGNED = 0;
+ parameter A_WIDTH = 1;
+ parameter B_WIDTH = 1;
+ parameter Y_WIDTH = 1;
+
+ input [A_WIDTH-1:0] A;
+ input [B_WIDTH-1:0] B;
+ output [Y_WIDTH-1:0] Y;
+
+ generate
+ if (A_SIGNED != B_SIGNED)
+ wire _TECHMAP_FAIL_ = 1;
+ else if (`DSP_SIGNEDONLY && !A_SIGNED) begin
+ wire [1:0] dummy;
+ \$mul #(
+ .A_SIGNED(1),
+ .B_SIGNED(1),
+ .A_WIDTH(A_WIDTH + 1),
+ .B_WIDTH(B_WIDTH + 1),
+ .Y_WIDTH(Y_WIDTH + 2)
+ ) _TECHMAP_REPLACE_ (
+ .A({1'b0, A}),
+ .B({1'b0, B}),
+ .Y({dummy, Y})
+ );
+ end
+ // NB: A_SIGNED == B_SIGNED == 0 from here
+ else if (A_WIDTH >= B_WIDTH)
+ \$__mul_gen #(
+ .A_SIGNED(A_SIGNED),
+ .B_SIGNED(B_SIGNED),
+ .A_WIDTH(A_WIDTH),
+ .B_WIDTH(B_WIDTH),
+ .Y_WIDTH(Y_WIDTH)
+ ) _TECHMAP_REPLACE_ (
+ .A(A),
+ .B(B),
+ .Y(Y)
+ );
+ else
+ \$__mul_gen #(
+ .A_SIGNED(B_SIGNED),
+ .B_SIGNED(A_SIGNED),
+ .A_WIDTH(B_WIDTH),
+ .B_WIDTH(A_WIDTH),
+ .Y_WIDTH(Y_WIDTH)
+ ) _TECHMAP_REPLACE_ (
+ .A(B),
+ .B(A),
+ .Y(Y)
+ );
+ endgenerate
+endmodule
+
+module \$__mul_gen (A, B, Y);
+ parameter A_SIGNED = 0;
+ parameter B_SIGNED = 0;
+ parameter A_WIDTH = 1;
+ parameter B_WIDTH = 1;
+ parameter Y_WIDTH = 1;
+
+ input [A_WIDTH-1:0] A;
+ input [B_WIDTH-1:0] B;
+ output [Y_WIDTH-1:0] Y;
+
+ wire [1023:0] _TECHMAP_DO_ = "proc; clean";
+
+`ifdef DSP_SIGNEDONLY
+ localparam sign_headroom = 1;
+`else
+ localparam sign_headroom = 0;
+`endif
+
+ genvar i;
+ generate
+ if (A_WIDTH > `DSP_A_MAXWIDTH) begin
+ localparam n = (A_WIDTH+`DSP_A_MAXWIDTH-sign_headroom-1) / (`DSP_A_MAXWIDTH-sign_headroom);
+ localparam partial_Y_WIDTH = `MIN(Y_WIDTH, B_WIDTH+`DSP_A_MAXWIDTH);
+ if (A_SIGNED && B_SIGNED) begin
+ wire signed [partial_Y_WIDTH-1:0] partial [n-1:0];
+ wire signed [Y_WIDTH-1:0] partial_sum [n-1:0];
+ end
+ else begin
+ wire [partial_Y_WIDTH-1:0] partial [n-1:0];
+ wire [Y_WIDTH-1:0] partial_sum [n-1:0];
+ end
+
+ \$__mul_gen #(
+ .A_SIGNED(0),
+ .B_SIGNED(B_SIGNED),
+ .A_WIDTH(`DSP_A_MAXWIDTH),
+ .B_WIDTH(B_WIDTH),
+ .Y_WIDTH(partial_Y_WIDTH)
+ ) mul_slice_first (
+ .A({{sign_headroom{1'b0}}, A[`DSP_A_MAXWIDTH-sign_headroom-1 : 0]}),
+ .B(B),
+ .Y(partial[0])
+ );
+ assign partial_sum[0] = partial[0];
+
+ for (i = 1; i < n-1; i=i+1) begin:slice
+ \$__mul_gen #(
+ .A_SIGNED(0),
+ .B_SIGNED(B_SIGNED),
+ .A_WIDTH(`DSP_A_MAXWIDTH),
+ .B_WIDTH(B_WIDTH),
+ .Y_WIDTH(partial_Y_WIDTH)
+ ) mul_slice (
+ .A({{sign_headroom{1'b0}}, A[i*(`DSP_A_MAXWIDTH-sign_headroom) +: `DSP_A_MAXWIDTH-sign_headroom]}),
+ .B(B),
+ .Y(partial[i])
+ );
+ assign partial_sum[i] = (partial[i] << i*(`DSP_A_MAXWIDTH-sign_headroom)) + partial_sum[i-1];
+ end
+
+ \$__mul_gen #(
+ .A_SIGNED(A_SIGNED),
+ .B_SIGNED(B_SIGNED),
+ .A_WIDTH(A_WIDTH-(n-1)*(`DSP_A_MAXWIDTH-sign_headroom)),
+ .B_WIDTH(B_WIDTH),
+ .Y_WIDTH(partial_Y_WIDTH)
+ ) mul_slice_last (
+ .A(A[A_WIDTH-1 : (n-1)*(`DSP_A_MAXWIDTH-sign_headroom)]),
+ .B(B),
+ .Y(partial[n-1])
+ );
+ assign partial_sum[n-1] = (partial[n-1] << (n-1)*(`DSP_A_MAXWIDTH-sign_headroom)) + partial_sum[n-2];
+ assign Y = partial_sum[n-1];
+ end
+ else if (B_WIDTH > `DSP_B_MAXWIDTH) begin
+ localparam n = (B_WIDTH+`DSP_B_MAXWIDTH-sign_headroom-1) / (`DSP_B_MAXWIDTH-sign_headroom);
+ localparam partial_Y_WIDTH = `MIN(Y_WIDTH, A_WIDTH+`DSP_B_MAXWIDTH);
+ if (A_SIGNED && B_SIGNED) begin
+ wire signed [partial_Y_WIDTH-1:0] partial [n-1:0];
+ wire signed [Y_WIDTH-1:0] partial_sum [n-1:0];
+ end
+ else begin
+ wire [partial_Y_WIDTH-1:0] partial [n-1:0];
+ wire [Y_WIDTH-1:0] partial_sum [n-1:0];
+ end
+
+ \$__mul_gen #(
+ .A_SIGNED(A_SIGNED),
+ .B_SIGNED(0),
+ .A_WIDTH(A_WIDTH),
+ .B_WIDTH(`DSP_B_MAXWIDTH),
+ .Y_WIDTH(partial_Y_WIDTH)
+ ) mul_first (
+ .A(A),
+ .B({{sign_headroom{1'b0}}, B[`DSP_B_MAXWIDTH-sign_headroom-1 : 0]}),
+ .Y(partial[0])
+ );
+ assign partial_sum[0] = partial[0];
+
+ for (i = 1; i < n-1; i=i+1) begin:slice
+ \$__mul_gen #(
+ .A_SIGNED(A_SIGNED),
+ .B_SIGNED(0),
+ .A_WIDTH(A_WIDTH),
+ .B_WIDTH(`DSP_B_MAXWIDTH),
+ .Y_WIDTH(partial_Y_WIDTH)
+ ) mul (
+ .A(A),
+ .B({{sign_headroom{1'b0}}, B[i*(`DSP_B_MAXWIDTH-sign_headroom) +: `DSP_B_MAXWIDTH-sign_headroom]}),
+ .Y(partial[i])
+ );
+ assign partial_sum[i] = (partial[i] << i*(`DSP_B_MAXWIDTH-sign_headroom)) + partial_sum[i-1];
+ end
+
+ \$__mul_gen #(
+ .A_SIGNED(A_SIGNED),
+ .B_SIGNED(B_SIGNED),
+ .A_WIDTH(A_WIDTH),
+ .B_WIDTH(B_WIDTH-(n-1)*(`DSP_B_MAXWIDTH-sign_headroom)),
+ .Y_WIDTH(partial_Y_WIDTH)
+ ) mul_last (
+ .A(A),
+ .B(B[B_WIDTH-1 : (n-1)*(`DSP_B_MAXWIDTH-sign_headroom)]),
+ .Y(partial[n-1])
+ );
+ assign partial_sum[n-1] = (partial[n-1] << (n-1)*(`DSP_A_MAXWIDTH-sign_headroom)) + partial_sum[n-2];
+ assign Y = partial_sum[n-1];
+ end
+ else begin
+ if (A_SIGNED)
+ wire signed [`DSP_A_MAXWIDTH-1:0] Aext = $signed(A);
+ else
+ wire [`DSP_A_MAXWIDTH-1:0] Aext = A;
+ if (B_SIGNED)
+ wire signed [`DSP_B_MAXWIDTH-1:0] Bext = $signed(B);
+ else
+ wire [`DSP_B_MAXWIDTH-1:0] Bext = B;
+
+ `DSP_NAME #(
+ .A_SIGNED(A_SIGNED),
+ .B_SIGNED(B_SIGNED),
+ .A_WIDTH(`DSP_A_MAXWIDTH),
+ .B_WIDTH(`DSP_B_MAXWIDTH),
+ .Y_WIDTH(`DSP_A_MAXWIDTH+`DSP_B_MAXWIDTH),
+ ) _TECHMAP_REPLACE_ (
+ .A(Aext),
+ .B(Bext),
+ .Y(Y)
+ );
+ end
+ endgenerate
+endmodule
+
+
diff --git a/techlibs/ecp5/Makefile.inc b/techlibs/ecp5/Makefile.inc
index 73e18112f..c7d6eee02 100644
--- a/techlibs/ecp5/Makefile.inc
+++ b/techlibs/ecp5/Makefile.inc
@@ -10,6 +10,7 @@ $(eval $(call add_share_file,share/ecp5,techlibs/ecp5/brams_map.v))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/bram.txt))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/arith_map.v))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/latches_map.v))
+$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/dsp_map.v))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/abc_5g.box))
$(eval $(call add_share_file,share/ecp5,techlibs/ecp5/abc_5g.lut))
diff --git a/techlibs/ecp5/dsp_map.v b/techlibs/ecp5/dsp_map.v
new file mode 100644
index 000000000..24e28869e
--- /dev/null
+++ b/techlibs/ecp5/dsp_map.v
@@ -0,0 +1,10 @@
+module \$__MUL18X18 (input [17:0] A, input [17:0] B, output [35:0] Y);
+ MULT18X18D _TECHMAP_REPLACE_ (
+ .A0(A[0]), .A1(A[1]), .A2(A[2]), .A3(A[3]), .A4(A[4]), .A5(A[5]), .A6(A[6]), .A7(A[7]), .A8(A[8]), .A9(A[9]), .A10(A[10]), .A11(A[11]), .A12(A[12]), .A13(A[13]), .A14(A[14]), .A15(A[15]), .A16(A[16]), .A17(A[17]),
+ .B0(B[0]), .B1(B[1]), .B2(B[2]), .B3(B[3]), .B4(B[4]), .B5(B[5]), .B6(B[6]), .B7(B[7]), .B8(B[8]), .B9(B[9]), .B10(B[10]), .B11(B[11]), .B12(B[12]), .B13(B[13]), .B14(B[14]), .B15(B[15]), .B16(B[16]), .B17(B[17]),
+ .C17(1'b0), .C16(1'b0), .C15(1'b0), .C14(1'b0), .C13(1'b0), .C12(1'b0), .C11(1'b0), .C10(1'b0), .C9(1'b0), .C8(1'b0), .C7(1'b0), .C6(1'b0), .C5(1'b0), .C4(1'b0), .C3(1'b0), .C2(1'b0), .C1(1'b0), .C0(1'b0),
+ .SIGNEDA(1'b0), .SIGNEDB(1'b0), .SOURCEA(1'b0), .SOURCEB(1'b0),
+
+ .P0(Y[0]), .P1(Y[1]), .P2(Y[2]), .P3(Y[3]), .P4(Y[4]), .P5(Y[5]), .P6(Y[6]), .P7(Y[7]), .P8(Y[8]), .P9(Y[9]), .P10(Y[10]), .P11(Y[11]), .P12(Y[12]), .P13(Y[13]), .P14(Y[14]), .P15(Y[15]), .P16(Y[16]), .P17(Y[17]), .P18(Y[18]), .P19(Y[19]), .P20(Y[20]), .P21(Y[21]), .P22(Y[22]), .P23(Y[23]), .P24(Y[24]), .P25(Y[25]), .P26(Y[26]), .P27(Y[27]), .P28(Y[28]), .P29(Y[29]), .P30(Y[30]), .P31(Y[31]), .P32(Y[32]), .P33(Y[33]), .P34(Y[34]), .P35(Y[35])
+ );
+endmodule
diff --git a/techlibs/ecp5/synth_ecp5.cc b/techlibs/ecp5/synth_ecp5.cc
index 143d1f95c..3129ba929 100644
--- a/techlibs/ecp5/synth_ecp5.cc
+++ b/techlibs/ecp5/synth_ecp5.cc
@@ -89,6 +89,9 @@ struct SynthEcp5Pass : public ScriptPass
log(" generate an output netlist (and BLIF file) suitable for VPR\n");
log(" (this feature is experimental and incomplete)\n");
log("\n");
+ log(" -dsp\n");
+ log(" map multipliers to MULT18X18D (EXPERIMENTAL)\n");
+ log("\n");
log("\n");
log("The following commands are executed by this synthesis command:\n");
help_script();
@@ -96,7 +99,7 @@ struct SynthEcp5Pass : public ScriptPass
}
string top_opt, blif_file, edif_file, json_file;
- bool noccu2, nodffe, nobram, nolutram, nowidelut, flatten, retime, abc2, abc9, vpr;
+ bool noccu2, nodffe, nobram, nolutram, nowidelut, flatten, retime, abc2, abc9, dsp, vpr;
void clear_flags() YS_OVERRIDE
{
@@ -114,6 +117,7 @@ struct SynthEcp5Pass : public ScriptPass
abc2 = false;
vpr = false;
abc9 = false;
+ dsp = false;
}
void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
@@ -192,6 +196,10 @@ struct SynthEcp5Pass : public ScriptPass
abc9 = true;
continue;
}
+ if (args[argidx] == "-dsp") {
+ dsp = true;
+ continue;
+ }
break;
}
extra_args(args, argidx, design);
@@ -228,7 +236,28 @@ struct SynthEcp5Pass : public ScriptPass
if (check_label("coarse"))
{
- run("synth -run coarse");
+ run("opt_expr");
+ run("opt_clean");
+ run("check");
+ run("opt");
+ run("wreduce");
+ run("peepopt");
+ run("opt_clean");
+ run("share");
+ run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4");
+ run("opt_expr");
+ run("opt_clean");
+ if (dsp) {
+ run("techmap -map +/mul2dsp.v -D DSP_A_MAXWIDTH=18 -D DSP_B_MAXWIDTH=18 -D DSP_NAME=$__MUL18X18");
+ run("clean");
+ run("techmap -map +/ecp5/dsp_map.v");
+ }
+ run("alumacc");
+ run("opt");
+ run("fsm");
+ run("opt -fast");
+ run("memory -nomap");
+ run("opt_clean");
}
if (!nobram && check_label("map_bram", "(skip if -nobram)"))
diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index be60a0071..5053e445d 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -265,8 +265,10 @@ struct SynthIce40Pass : public ScriptPass
run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4");
run("opt_expr");
run("opt_clean");
- if (help_mode || dsp)
+ if (help_mode || dsp) {
+ run("techmap -map +/mul2dsp.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 -D DSP_NAME=$__MUL16X16");
run("ice40_dsp", "(if -dsp)");
+ }
run("alumacc");
run("opt");
run("fsm");
diff --git a/techlibs/xilinx/Makefile.inc b/techlibs/xilinx/Makefile.inc
index 2c6e7432e..b0251d621 100644
--- a/techlibs/xilinx/Makefile.inc
+++ b/techlibs/xilinx/Makefile.inc
@@ -38,6 +38,7 @@ $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/arith_map.v))
$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/ff_map.v))
$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/lut_map.v))
$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/mux_map.v))
+$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/dsp_map.v))
$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/abc_xc7.box))
$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/abc_xc7.lut))
diff --git a/techlibs/xilinx/cells_sim.v b/techlibs/xilinx/cells_sim.v
index 05e46b4e7..33b2a8f62 100644
--- a/techlibs/xilinx/cells_sim.v
+++ b/techlibs/xilinx/cells_sim.v
@@ -378,3 +378,150 @@ module SRLC32E (
always @(posedge CLK) if (CE) r <= { r[30:0], D };
endgenerate
endmodule
+
+module DSP48E1 (
+ output [29:0] ACOUT,
+ output [17:0] BCOUT,
+ output CARRYCASCOUT,
+ output [3:0] CARRYOUT,
+ output MULTSIGNOUT,
+ output OVERFLOW,
+ output reg signed [47:0] P,
+ output PATTERNBDETECT,
+ output PATTERNDETECT,
+ output [47:0] PCOUT,
+ output UNDERFLOW,
+ input signed [29:0] A,
+ input [29:0] ACIN,
+ input [3:0] ALUMODE,
+ input signed [17:0] B,
+ input [17:0] BCIN,
+ input [47:0] C,
+ input CARRYCASCIN,
+ input CARRYIN,
+ input [2:0] CARRYINSEL,
+ input CEA1,
+ input CEA2,
+ input CEAD,
+ input CEALUMODE,
+ input CEB1,
+ input CEB2,
+ input CEC,
+ input CECARRYIN,
+ input CECTRL,
+ input CED,
+ input CEINMODE,
+ input CEM,
+ input CEP,
+ input CLK,
+ input [24:0] D,
+ input [4:0] INMODE,
+ input MULTSIGNIN,
+ input [6:0] OPMODE,
+ input [47:0] PCIN,
+ input RSTA,
+ input RSTALLCARRYIN,
+ input RSTALUMODE,
+ input RSTB,
+ input RSTC,
+ input RSTCTRL,
+ input RSTD,
+ input RSTINMODE,
+ input RSTM,
+ input RSTP
+);
+ parameter integer ACASCREG = 1;
+ parameter integer ADREG = 1;
+ parameter integer ALUMODEREG = 1;
+ parameter integer AREG = 1;
+ parameter AUTORESET_PATDET = "NO_RESET";
+ parameter A_INPUT = "DIRECT";
+ parameter integer BCASCREG = 1;
+ parameter integer BREG = 1;
+ parameter B_INPUT = "DIRECT";
+ parameter integer CARRYINREG = 1;
+ parameter integer CARRYINSELREG = 1;
+ parameter integer CREG = 1;
+ parameter integer DREG = 1;
+ parameter integer INMODEREG = 1;
+ parameter integer MREG = 1;
+ parameter integer OPMODEREG = 1;
+ parameter integer PREG = 1;
+ parameter SEL_MASK = "MASK";
+ parameter SEL_PATTERN = "PATTERN";
+ parameter USE_DPORT = "FALSE";
+ parameter USE_MULT = "MULTIPLY";
+ parameter USE_PATTERN_DETECT = "NO_PATDET";
+ parameter USE_SIMD = "ONE48";
+ parameter [47:0] MASK = 48'h3FFFFFFFFFFF;
+ parameter [47:0] PATTERN = 48'h000000000000;
+ parameter [3:0] IS_ALUMODE_INVERTED = 4'b0;
+ parameter [0:0] IS_CARRYIN_INVERTED = 1'b0;
+ parameter [0:0] IS_CLK_INVERTED = 1'b0;
+ parameter [4:0] IS_INMODE_INVERTED = 5'b0;
+ parameter [6:0] IS_OPMODE_INVERTED = 7'b0;
+
+ 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 (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");
+ if (IS_INMODE_INVERTED != 5'b0) $fatal(1, "Unsupported IS_INMODE_INVERTED value");
+ if (IS_OPMODE_INVERTED != 7'b0) $fatal(1, "Unsupported IS_OPMODE_INVERTED value");
+`endif
+ end
+
+ reg signed [29:0] Ar;
+ reg signed [17:0] Br;
+ reg signed [47:0] Pr;
+ 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;
+ endgenerate
+
+ always @* begin
+ Pr <= {48{1'bx}};
+`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");
+`endif
+ Pr[42:0] <= $signed(Ar[24:0]) * Br;
+ end
+
+ generate
+ if (PREG == 1) begin always @(posedge CLK) if (CEP) P <= Pr; end
+ else always @* P <= Pr;
+ endgenerate
+
+endmodule
diff --git a/techlibs/xilinx/cells_xtra.v b/techlibs/xilinx/cells_xtra.v
index 15fa1b63a..d79349225 100644
--- a/techlibs/xilinx/cells_xtra.v
+++ b/techlibs/xilinx/cells_xtra.v
@@ -111,88 +111,6 @@ module DNA_PORT (...);
input CLK, DIN, READ, SHIFT;
endmodule
-module DSP48E1 (...);
- parameter integer ACASCREG = 1;
- parameter integer ADREG = 1;
- parameter integer ALUMODEREG = 1;
- parameter integer AREG = 1;
- parameter AUTORESET_PATDET = "NO_RESET";
- parameter A_INPUT = "DIRECT";
- parameter integer BCASCREG = 1;
- parameter integer BREG = 1;
- parameter B_INPUT = "DIRECT";
- parameter integer CARRYINREG = 1;
- parameter integer CARRYINSELREG = 1;
- parameter integer CREG = 1;
- parameter integer DREG = 1;
- parameter integer INMODEREG = 1;
- parameter integer MREG = 1;
- parameter integer OPMODEREG = 1;
- parameter integer PREG = 1;
- parameter SEL_MASK = "MASK";
- parameter SEL_PATTERN = "PATTERN";
- parameter USE_DPORT = "FALSE";
- parameter USE_MULT = "MULTIPLY";
- parameter USE_PATTERN_DETECT = "NO_PATDET";
- parameter USE_SIMD = "ONE48";
- parameter [47:0] MASK = 48'h3FFFFFFFFFFF;
- parameter [47:0] PATTERN = 48'h000000000000;
- parameter [3:0] IS_ALUMODE_INVERTED = 4'b0;
- parameter [0:0] IS_CARRYIN_INVERTED = 1'b0;
- parameter [0:0] IS_CLK_INVERTED = 1'b0;
- parameter [4:0] IS_INMODE_INVERTED = 5'b0;
- parameter [6:0] IS_OPMODE_INVERTED = 7'b0;
- output [29:0] ACOUT;
- output [17:0] BCOUT;
- output CARRYCASCOUT;
- output [3:0] CARRYOUT;
- output MULTSIGNOUT;
- output OVERFLOW;
- output [47:0] P;
- output PATTERNBDETECT;
- output PATTERNDETECT;
- output [47:0] PCOUT;
- output UNDERFLOW;
- input [29:0] A;
- input [29:0] ACIN;
- input [3:0] ALUMODE;
- input [17:0] B;
- input [17:0] BCIN;
- input [47:0] C;
- input CARRYCASCIN;
- input CARRYIN;
- input [2:0] CARRYINSEL;
- input CEA1;
- input CEA2;
- input CEAD;
- input CEALUMODE;
- input CEB1;
- input CEB2;
- input CEC;
- input CECARRYIN;
- input CECTRL;
- input CED;
- input CEINMODE;
- input CEM;
- input CEP;
- input CLK;
- input [24:0] D;
- input [4:0] INMODE;
- input MULTSIGNIN;
- input [6:0] OPMODE;
- input [47:0] PCIN;
- input RSTA;
- input RSTALLCARRYIN;
- input RSTALUMODE;
- input RSTB;
- input RSTC;
- input RSTCTRL;
- input RSTD;
- input RSTINMODE;
- input RSTM;
- input RSTP;
-endmodule
-
module EFUSE_USR (...);
parameter [31:0] SIM_EFUSE_VALUE = 32'h00000000;
output [31:0] EFUSEUSR;
diff --git a/techlibs/xilinx/dsp_map.v b/techlibs/xilinx/dsp_map.v
new file mode 100644
index 000000000..32f570935
--- /dev/null
+++ b/techlibs/xilinx/dsp_map.v
@@ -0,0 +1,40 @@
+module \$__MUL25X18 (input signed [24:0] A, input signed [17:0] B, output signed [42:0] Y);
+ wire [47:0] P_48;
+ DSP48E1 #(
+ // Disable all registers
+ .ACASCREG(0),
+ .ADREG(0),
+ .A_INPUT("DIRECT"),
+ .ALUMODEREG(0),
+ .AREG(0),
+ .BCASCREG(0),
+ .B_INPUT("DIRECT"),
+ .BREG(0),
+ .CARRYINREG(0),
+ .CARRYINSELREG(0),
+ .CREG(0),
+ .DREG(0),
+ .INMODEREG(0),
+ .MREG(0),
+ .OPMODEREG(0),
+ .PREG(0)
+ ) _TECHMAP_REPLACE_ (
+ //Data path
+ .A({{5{A[24]}}, A}),
+ .B(B),
+ .C(48'b0),
+ .D(24'b0),
+ .P(P_48),
+
+ .INMODE(4'b0000),
+ .ALUMODE(4'b0000),
+ .OPMODE(7'b000101),
+ .CARRYINSEL(3'b000),
+
+ .ACIN(30'b0),
+ .BCIN(18'b0),
+ .PCIN(48'b0),
+ .CARRYIN(1'b0)
+ );
+ assign Y = P_48;
+endmodule
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc
index b672a0d4f..e5a27015a 100644
--- a/techlibs/xilinx/synth_xilinx.cc
+++ b/techlibs/xilinx/synth_xilinx.cc
@@ -78,6 +78,9 @@ struct SynthXilinxPass : public ScriptPass
log(" -nowidelut\n");
log(" do not use MUXF[78] resources to implement LUTs larger than LUT6s\n");
log("\n");
+ log(" -nodsp\n");
+ log(" do not use DSP48E1s to implement multipliers and associated logic\n");
+ log("\n");
log(" -widemux <int>\n");
log(" enable inference of hard multiplexer resources (MUXF[78]) for muxes at or\n");
log(" above this number of inputs (minimum value 2, recommended value >= 5).\n");
@@ -104,7 +107,7 @@ struct SynthXilinxPass : public ScriptPass
}
std::string top_opt, edif_file, blif_file, family;
- bool flatten, retime, vpr, nobram, nodram, nosrl, nocarry, nowidelut, abc9;
+ bool flatten, retime, vpr, nobram, nodram, nosrl, nocarry, nowidelut, nodsp, abc9;
int widemux;
void clear_flags() YS_OVERRIDE
@@ -122,6 +125,7 @@ struct SynthXilinxPass : public ScriptPass
nosrl = false;
nocarry = false;
nowidelut = false;
+ nodsp = false;
abc9 = false;
widemux = 0;
}
@@ -202,6 +206,10 @@ struct SynthXilinxPass : public ScriptPass
abc9 = true;
continue;
}
+ if (args[argidx] == "-nodsp") {
+ nodsp = true;
+ continue;
+ }
break;
}
extra_args(args, argidx, design);
@@ -249,8 +257,8 @@ struct SynthXilinxPass : public ScriptPass
if (check_label("coarse")) {
run("proc");
- if (help_mode || flatten)
- run("flatten", "(if -flatten)");
+ if (flatten || help_mode)
+ run("flatten", "(with '-flatten')");
run("opt_expr");
run("opt_clean");
run("check");
@@ -275,6 +283,12 @@ struct SynthXilinxPass : public ScriptPass
}
run("techmap -map +/cmp2lut.v -D LUT_WIDTH=6");
+
+ if (!nodsp || help_mode) {
+ // NB: Xilinx multipliers are signed only
+ run("techmap -map +/mul2dsp.v -D DSP_A_MAXWIDTH=25 -D DSP_B_MAXWIDTH=18 -D DSP_SIGNEDONLY=1 -D DSP_NAME=$__MUL25X18");
+ }
+
run("alumacc");
run("share");
run("opt");
@@ -317,6 +331,10 @@ struct SynthXilinxPass : public ScriptPass
run("memory_map");
run("dffsr2dff");
run("dff2dffe");
+ if (help_mode || !nodsp) {
+ run("techmap -map +/xilinx/dsp_map.v", "(skip if '-nodsp')");
+ run("xilinx_dsp", " (skip if '-nodsp')");
+ }
if (help_mode) {
run("simplemap t:$mux", " ('-widemux' only)");
run("muxcover <internal options>, ('-widemux' only)");
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-05 07:01:07 +0000