Added MUXCY and XORCY support to synth_xilinx

diff --git a/techlibs/xilinx/Makefile.inc b/techlibs/xilinx/Makefile.inc
index b653660fa5f123ec1d1e1a01113f3631e5f0bbd0..646bd4c34dfeda2fd5a14355c0e222cc83cab445 100644 (file)
--- a/techlibs/xilinx/Makefile.inc
+++ b/techlibs/xilinx/Makefile.inc
@@ -5,4 +5,5 @@ $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/cells.v))
 $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/cells_sim.v))
 $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/brams.txt))
 $(eval $(call add_share_file,share/xilinx,techlibs/xilinx/brams.v))
+$(eval $(call add_share_file,share/xilinx,techlibs/xilinx/arith.v))
 

diff --git a/techlibs/xilinx/arith.v b/techlibs/xilinx/arith.v
new file mode 100644 (file)
index 0000000..a154f77
--- /dev/null
+++ b/techlibs/xilinx/arith.v
@@ -0,0 +1,91 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *  
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *  
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+(* techmap_celltype = "$lcu" *)
+module _80_xilinx_lcu (P, G, CI, CO);
+       parameter WIDTH = 2;
+
+       input [WIDTH-1:0] P, G;
+       input CI;
+
+       output [WIDTH-1:0] CO;
+
+       wire _TECHMAP_FAIL_ = WIDTH <= 2;
+
+       wire [WIDTH-1:0] C = {CO, CI};
+       wire [WIDTH-1:0] S = P & ~G;
+
+       genvar i;
+       generate for (i = 0; i < WIDTH; i = i + 1) begin:slice
+               MUXCY muxcy (
+                       .CI(C[i]),
+                       .DI(G[i]),
+                       .S(S[i]),
+                       .O(CO[i])
+               );
+       end endgenerate
+endmodule
+
+(* techmap_celltype = "$alu" *)
+module _80_xilinx_alu (A, B, CI, BI, X, Y, CO);
+       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] X, Y;
+
+       input CI, BI;
+       output [Y_WIDTH-1:0] CO;
+
+       wire _TECHMAP_FAIL_ = Y_WIDTH <= 2;
+
+       wire [Y_WIDTH-1:0] A_buf, B_buf;
+       \$pos #(.A_SIGNED(A_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(Y_WIDTH)) A_conv (.A(A), .Y(A_buf));
+       \$pos #(.A_SIGNED(B_SIGNED), .A_WIDTH(B_WIDTH), .Y_WIDTH(Y_WIDTH)) B_conv (.A(B), .Y(B_buf));
+
+       wire [Y_WIDTH-1:0] AA = A_buf;
+       wire [Y_WIDTH-1:0] BB = BI ? ~B_buf : B_buf;
+
+       wire [Y_WIDTH-1:0] P = AA ^ BB;
+       wire [Y_WIDTH-1:0] G = AA & BB;
+       wire [Y_WIDTH-1:0] C = {CO, CI};
+       wire [Y_WIDTH-1:0] S = P & ~G;
+
+       genvar i;
+       generate for (i = 0; i < Y_WIDTH; i = i + 1) begin:slice
+               MUXCY muxcy (
+                       .CI(C[i]),
+                       .DI(G[i]),
+                       .S(S[i]),
+                       .O(CO[i])
+               );
+               XORCY xorcy (
+                       .CI(C[i]),
+                       .LI(S[i]),
+                       .O(Y[i])
+               );
+       end endgenerate
+
+       assign X = P;
+endmodule
+

diff --git a/techlibs/xilinx/cells_sim.v b/techlibs/xilinx/cells_sim.v
index cb290db807e7617745e5fad53c494ca4df44e7d3..138a6470fe5684beba06ebd2b083d381e36723ac 100644 (file)
--- a/techlibs/xilinx/cells_sim.v
+++ b/techlibs/xilinx/cells_sim.v
@@ -1,4 +1,8 @@
 
+// See Xilinx UG953 and UG474 for a description of the cell types below.
+// http://www.xilinx.com/support/documentation/user_guides/ug474_7Series_CLB.pdf
+// http://www.xilinx.com/support/documentation/sw_manuals/xilinx2014_4/ug953-vivado-7series-libraries.pdf
+
 module VCC(output P);
   assign P = 1;
 endmodule

diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc
index 289de439981a0b1d2a9433aa010f2ae23521002b..35bc4302e6ea1d29d3e3ec8f96810e157dfaaaba 100644 (file)
--- a/techlibs/xilinx/synth_xilinx.cc
+++ b/techlibs/xilinx/synth_xilinx.cc
@@ -73,7 +73,11 @@ struct SynthXilinxPass : public Pass {
                log("        techmap -map +/xilinx/brams.v\n");
                log("\n");
                log("    fine:\n");
-               log("        synth -run fine\n");
+               log("        opt -fast -full\n");
+               log("        memory_map\n");
+               log("        opt -full\n");
+               log("        techmap -map +/techmap.v -map +/xilinx/arith.v\n");
+               log("        opt -fast\n");
                log("\n");
                log("    map_luts:\n");
                log("        abc -lut 6:8\n");
@@ -144,7 +148,11 @@ struct SynthXilinxPass : public Pass {
 
                if (check_label(active, run_from, run_to, "fine"))
                {
-                       Pass::call(design, "synth -run fine");
+                       Pass::call(design, "opt -fast -full");
+                       Pass::call(design, "memory_map");
+                       Pass::call(design, "opt -full");
+                       Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith.v");
+                       Pass::call(design, "opt -fast");
                }
 
                if (check_label(active, run_from, run_to, "map_luts"))