diff options
| -rw-r--r-- | passes/techmap/abc.cc | 4 | ||||
| -rw-r--r-- | techlibs/xilinx/ff_map.v | 8 | ||||
| -rw-r--r-- | techlibs/xilinx/synth_xilinx.cc | 14 | ||||
| -rw-r--r-- | tests/simple/retime.v | 6 |
4 files changed, 21 insertions, 11 deletions
diff --git a/passes/techmap/abc.cc b/passes/techmap/abc.cc index 21b70f492..e2a152348 100644 --- a/passes/techmap/abc.cc +++ b/passes/techmap/abc.cc @@ -1674,6 +1674,8 @@ struct AbcPass : public Pass { } if (arg == "-dff") { dff_mode = true; + if (delay_target.empty()) + delay_target = "-D 1"; continue; } if (arg == "-clk" && argidx+1 < args.size()) { @@ -1726,7 +1728,7 @@ struct AbcPass : public Pass { signal_init[initsig[i]] = State::S0; break; case State::S1: - signal_init[initsig[i]] = State::S0; + signal_init[initsig[i]] = State::S1; break; default: break; diff --git a/techlibs/xilinx/ff_map.v b/techlibs/xilinx/ff_map.v index 13beaa6ae..3d5f78770 100644 --- a/techlibs/xilinx/ff_map.v +++ b/techlibs/xilinx/ff_map.v @@ -28,14 +28,14 @@ module \$_DFF_P_ (input D, C, output Q); FDRE #(.INIT(|0)) _TECHMAP_REPL module \$_DFFE_NP_ (input D, C, E, output Q); FDRE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(E), .R(1'b0)); endmodule module \$_DFFE_PP_ (input D, C, E, output Q); FDRE #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(E), .R(1'b0)); endmodule -module \$_DFF_NN0_ (input D, C, R, output Q); FDCE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR(!R)); endmodule +module \$_DFF_NN0_ (input D, C, R, output Q); \$_DFF_NP0_ _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .R(~R)); endmodule module \$_DFF_NP0_ (input D, C, R, output Q); FDCE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR( R)); endmodule -module \$_DFF_PN0_ (input D, C, R, output Q); FDCE #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR(!R)); endmodule +module \$_DFF_PN0_ (input D, C, R, output Q); \$_DFF_PP0_ _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .R(~R)); endmodule module \$_DFF_PP0_ (input D, C, R, output Q); FDCE #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .CLR( R)); endmodule -module \$_DFF_NN1_ (input D, C, R, output Q); FDPE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE(!R)); endmodule +module \$_DFF_NN1_ (input D, C, R, output Q); \$_DFF_NP1 _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .R(~R)); endmodule module \$_DFF_NP1_ (input D, C, R, output Q); FDPE_1 #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE( R)); endmodule -module \$_DFF_PN1_ (input D, C, R, output Q); FDPE #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE(!R)); endmodule +module \$_DFF_PN1_ (input D, C, R, output Q); \$_DFF_PP1 _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .R(~R)); endmodule module \$_DFF_PP1_ (input D, C, R, output Q); FDPE #(.INIT(|0)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C), .CE(1'b1), .PRE( R)); endmodule `endif diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc index 805ae8e6e..397c83ac6 100644 --- a/techlibs/xilinx/synth_xilinx.cc +++ b/techlibs/xilinx/synth_xilinx.cc @@ -110,13 +110,14 @@ struct SynthXilinxPass : public Pass log(" dffsr2dff\n"); log(" dff2dffe\n"); log(" opt -full\n"); - log(" techmap -map +/techmap.v -map +/xilinx/arith_map.v -map +/xilinx/ff_map.v\n"); + log(" techmap -map +/techmap.v -map +/xilinx/arith_map.v\n"); log(" opt -fast\n"); log("\n"); log(" map_luts:\n"); - log(" abc -luts 2:2,3,6:5,10,20 [-dff] (without '-vpr' only!)\n"); - log(" abc -lut 5 [-dff] (with '-vpr' only!)\n"); + log(" techmap -map +/techmap.v -map +/xilinx/ff_map.v t:$_DFF_?N?\n"); + log(" abc -luts 2:2,3,6:5,10,20 [-dff]\n"); log(" clean\n"); + log(" techmap -map +/xilinx/lut_map.v -map +/xilinx/ff_map.v"); log("\n"); log(" map_cells:\n"); log(" techmap -map +/xilinx/cells_map.v\n"); @@ -256,9 +257,9 @@ struct SynthXilinxPass : public Pass Pass::call(design, "opt -full"); if (vpr) { - Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v -map +/xilinx/ff_map.v -D _EXPLICIT_CARRY"); + Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v -D _EXPLICIT_CARRY"); } else { - Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v -map +/xilinx/ff_map.v"); + Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v"); } Pass::call(design, "hierarchy -check"); @@ -267,9 +268,10 @@ struct SynthXilinxPass : public Pass if (check_label(active, run_from, run_to, "map_luts")) { + Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/ff_map.v t:$_DFF_?N?"); Pass::call(design, "abc -luts 2:2,3,6:5,10,20" + string(retime ? " -dff" : "")); Pass::call(design, "clean"); - Pass::call(design, "techmap -map +/xilinx/lut_map.v"); + Pass::call(design, "techmap -map +/xilinx/lut_map.v -map +/xilinx/ff_map.v"); } if (check_label(active, run_from, run_to, "map_cells")) diff --git a/tests/simple/retime.v b/tests/simple/retime.v new file mode 100644 index 000000000..30b6087dc --- /dev/null +++ b/tests/simple/retime.v @@ -0,0 +1,6 @@ +module retime_test(input clk, input [7:0] a, output z); + reg [7:0] ff = 8'hF5; + always @(posedge clk) + ff <= {ff[6:0], ^a}; + assign z = ff[7]; +endmodule |