Merge remote-tracking branch 'origin/master' into eddie/opt_merge_init

10 files changed, 81 insertions, 55 deletions

diff --git a/techlibs/ice40/abc9_hx.box b/techlibs/ice40/abc9_hx.box
index 3ea70bc91..31e743669 100644
--- a/techlibs/ice40/abc9_hx.box
+++ b/techlibs/ice40/abc9_hx.box
@@ -1,13 +1,17 @@
 # From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_hx8k.txt
 
-# NB: Inputs/Outputs must be ordered alphabetically
-#     (with exceptions for carry in/out)
+# NB: Box inputs/outputs must each be in the same order
+#     as their corresponding module definition
+#     (with exceptions detailed below)
 
-# Inputs: A B I0 I3 CI
-# Outputs: O CO
-#   (NB: carry chain input/output must be last
-#        input/output and have been moved there
-#        overriding the alphabetical ordering)
-$__ICE40_CARRY_WRAPPER 1 1 5 2
-400 379 449 316 316
-259 231 -   -   126
+# Box 1 : $__ICE40_CARRY_WRAPPER (private cell used to preserve
+#                                 SB_LUT4+SB_CARRY)
+#   (Exception: carry chain input/output must be the
+#        last input and output and the entire bus has been
+#        moved there overriding the otherwise
+#        alphabetical ordering)
+# name                 ID  w/b ins outs
+$__ICE40_CARRY_WRAPPER 1   1   5   2
+#A  B   I0  I3  CI
+400 379 449 316 316 # O
+259 231 -   -   126 # CO
diff --git a/techlibs/ice40/abc9_lp.box b/techlibs/ice40/abc9_lp.box
index 473e92fe9..71986a67b 100644
--- a/techlibs/ice40/abc9_lp.box
+++ b/techlibs/ice40/abc9_lp.box
@@ -1,13 +1,17 @@
 # From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_lp8k.txt
 
-# NB: Inputs/Outputs must be ordered alphabetically
-#     (with exceptions for carry in/out)
+# NB: Box inputs/outputs must each be in the same order
+#     as their corresponding module definition
+#     (with exceptions detailed below)
 
-# Inputs: A B I0 I3 CI
-# Outputs: O CO
-#   (NB: carry chain input/output must be last
-#        input/output and have been moved there
-#        overriding the alphabetical ordering)
-$__ICE40_CARRY_WRAPPER 1 1 5 2
-589 558 661 465 465
-675 609 -   -   186
+# Box 1 : $__ICE40_CARRY_WRAPPER (private cell used to preserve
+#                                 SB_LUT4+SB_CARRY)
+#   (Exception: carry chain input/output must be the
+#        last input and output and the entire bus has been
+#        moved there overriding the otherwise
+#        alphabetical ordering)
+# name                 ID  w/b ins outs
+$__ICE40_CARRY_WRAPPER 1   1   5   2
+#A  B   I0  I3  CI
+589 558 661 465 465 # O
+675 609 -   -   186 # CO
diff --git a/techlibs/ice40/abc9_model.v b/techlibs/ice40/abc9_model.v
index 26cf6cc22..a5e5f4372 100644
--- a/techlibs/ice40/abc9_model.v
+++ b/techlibs/ice40/abc9_model.v
@@ -9,6 +9,8 @@ module \$__ICE40_CARRY_WRAPPER (
 	input I0, I3
 );
 	parameter LUT = 0;
+	parameter I3_IS_CI = 0;
+	wire I3_OR_CI = I3_IS_CI ? CI : I3;
 	SB_CARRY carry (
 		.I0(A),
 		.I1(B),
@@ -21,7 +23,7 @@ module \$__ICE40_CARRY_WRAPPER (
 		.I0(I0),
 		.I1(A),
 		.I2(B),
-		.I3(I3),
+		.I3(I3_OR_CI),
 		.O(O)
 	);
 endmodule
diff --git a/techlibs/ice40/abc9_u.box b/techlibs/ice40/abc9_u.box
index f00e247b8..3d4b93834 100644
--- a/techlibs/ice40/abc9_u.box
+++ b/techlibs/ice40/abc9_u.box
@@ -1,13 +1,17 @@
 # From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_up5k.txt
 
-# NB: Inputs/Outputs must be ordered alphabetically
-#     (with exceptions for carry in/out)
+# NB: Box inputs/outputs must each be in the same order
+#     as their corresponding module definition
+#     (with exceptions detailed below)
 
-# Inputs: A B I0 I3 CI
-# Outputs: O CO
-#   (NB: carry chain input/output must be last
-#        input/output and have been moved there
-#        overriding the alphabetical ordering)
-$__ICE40_CARRY_WRAPPER 1 1 5 2
-1231 1205 1285 874 874
-675  609  -    -   278
+# Box 1 : $__ICE40_CARRY_WRAPPER (private cell used to preserve
+#                                 SB_LUT4+SB_CARRY)
+#   (Exception: carry chain input/output must be the
+#        last input and output and the entire bus has been
+#        moved there overriding the otherwise
+#        alphabetical ordering)
+# name                 ID  w/b ins outs
+$__ICE40_CARRY_WRAPPER 1   1   5   2
+#A   B    I0   I3  CI
+1231 1205 1285 874 874 # O
+675  609  -    -   278 # CO
diff --git a/techlibs/ice40/arith_map.v b/techlibs/ice40/arith_map.v
index 00a07247b..ed4140e44 100644
--- a/techlibs/ice40/arith_map.v
+++ b/techlibs/ice40/arith_map.v
@@ -49,13 +49,14 @@ module _80_ice40_alu (A, B, CI, BI, X, Y, CO);
 			//    A[1]: 1100 1100 1100 1100
 			//    A[2]: 1111 0000 1111 0000
 			//    A[3]: 1111 1111 0000 0000
-			.LUT(16'b 0110_1001_1001_0110)
+			.LUT(16'b 0110_1001_1001_0110),
+			.I3_IS_CI(1'b1)
 		) carry (
 			.A(AA[i]),
 			.B(BB[i]),
 			.CI(C[i]),
 			.I0(1'b0),
-			.I3(C[i]),
+			.I3(1'bx),
 			.CO(CO[i]),
 			.O(Y[i])
 		);
diff --git a/techlibs/ice40/cells_map.v b/techlibs/ice40/cells_map.v
index 759549e30..d5362eb83 100644
--- a/techlibs/ice40/cells_map.v
+++ b/techlibs/ice40/cells_map.v
@@ -42,19 +42,18 @@ module \$lut (A, Y);
         .I0(1'b0), .I1(1'b0), .I2(1'b0), .I3(A[0]));
     end else
     if (WIDTH == 2) begin
-      localparam [15:0] INIT = {{4{LUT[3]}}, {4{LUT[1]}}, {4{LUT[2]}}, {4{LUT[0]}}};
+      localparam [15:0] INIT = {{4{LUT[3]}}, {4{LUT[2]}}, {4{LUT[1]}}, {4{LUT[0]}}};
       SB_LUT4 #(.LUT_INIT(INIT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(1'b0), .I1(1'b0), .I2(A[1]), .I3(A[0]));
+        .I0(1'b0), .I1(1'b0), .I2(A[0]), .I3(A[1]));
     end else
     if (WIDTH == 3) begin
-      localparam [15:0] INIT = {{2{LUT[7]}}, {2{LUT[3]}}, {2{LUT[5]}}, {2{LUT[1]}}, {2{LUT[6]}}, {2{LUT[2]}}, {2{LUT[4]}}, {2{LUT[0]}}};
+      localparam [15:0] INIT = {{2{LUT[7]}}, {2{LUT[6]}}, {2{LUT[5]}}, {2{LUT[4]}}, {2{LUT[3]}}, {2{LUT[2]}}, {2{LUT[1]}}, {2{LUT[0]}}};
       SB_LUT4 #(.LUT_INIT(INIT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(1'b0), .I1(A[2]), .I2(A[1]), .I3(A[0]));
+        .I0(1'b0), .I1(A[0]), .I2(A[1]), .I3(A[2]));
     end else
     if (WIDTH == 4) begin
-      localparam [15:0] INIT = {LUT[15], LUT[7], LUT[11], LUT[3], LUT[13], LUT[5], LUT[9], LUT[1], LUT[14], LUT[6], LUT[10], LUT[2], LUT[12], LUT[4], LUT[8], LUT[0]};
-      SB_LUT4 #(.LUT_INIT(INIT)) _TECHMAP_REPLACE_ (.O(Y),
-        .I0(A[3]), .I1(A[2]), .I2(A[1]), .I3(A[0]));
+      SB_LUT4 #(.LUT_INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y),
+        .I0(A[0]), .I1(A[1]), .I2(A[2]), .I3(A[3]));
     end else begin
       wire _TECHMAP_FAIL_ = 1;
     end
diff --git a/techlibs/ice40/cells_sim.v b/techlibs/ice40/cells_sim.v
index 7d1b37fd6..50eab5dde 100644
--- a/techlibs/ice40/cells_sim.v
+++ b/techlibs/ice40/cells_sim.v
@@ -1126,6 +1126,7 @@ module SB_SPRAM256KA (
 	input [15:0] DATAIN,
 	input [3:0] MASKWREN,
 	input WREN, CHIPSELECT, CLOCK, STANDBY, SLEEP, POWEROFF,
+	`ABC9_ARRIVAL_U(1821)  // https://github.com/cliffordwolf/icestorm/blob/95949315364f8d9b0c693386aefadf44b28e2cf6/icefuzz/timings_up5k.txt#L13207
 	output reg [15:0] DATAOUT
 );
 `ifndef BLACKBOX
diff --git a/techlibs/ice40/ice40_ffinit.cc b/techlibs/ice40/ice40_ffinit.cc
index 3089d8932..c098736e9 100644
--- a/techlibs/ice40/ice40_ffinit.cc
+++ b/techlibs/ice40/ice40_ffinit.cc
@@ -78,10 +78,12 @@ struct Ice40FfinitPass : public Pass {
 						continue;
 
 					if (initbits.count(bit)) {
-						if (initbits.at(bit) != val)
-							log_error("Conflicting init values for signal %s (%s = %s, %s = %s).\n",
+						if (initbits.at(bit) != val) {
+							log_warning("Conflicting init values for signal %s (%s = %s, %s = %s).\n",
 									log_signal(bit), log_signal(SigBit(wire, i)), log_signal(val),
 									log_signal(initbit_to_wire[bit]), log_signal(initbits.at(bit)));
+							initbits.at(bit) = State::Sx;
+						}
 						continue;
 					}
 
@@ -114,6 +116,10 @@ struct Ice40FfinitPass : public Pass {
 					continue;
 
 				State val = initbits.at(bit_q);
+
+				if (val == State::Sx)
+					continue;
+
 				handled_initbits.insert(bit_q);
 
 				log("FF init value for cell %s (%s): %s = %c\n", log_id(cell), log_id(cell->type),
diff --git a/techlibs/ice40/ice40_opt.cc b/techlibs/ice40/ice40_opt.cc
index 371ceb623..925ab31bb 100644
--- a/techlibs/ice40/ice40_opt.cc
+++ b/techlibs/ice40/ice40_opt.cc
@@ -128,6 +128,8 @@ static void run_ice40_opts(Module *module)
 							new_attr.insert(std::make_pair(a.first, a.second));
 						else if (a.first.in(ID(SB_LUT4.name), ID::keep, ID(module_not_derived)))
 							continue;
+						else if (a.first.begins_with("\\SB_CARRY.\\"))
+							continue;
 						else
 							log_abort();
 					cell->attributes = std::move(new_attr);
@@ -137,7 +139,8 @@ static void run_ice40_opts(Module *module)
 				log("Optimized $__ICE40_CARRY_WRAPPER cell back to logic (without SB_CARRY) %s.%s: CO=%s\n",
 						log_id(module), log_id(cell), log_signal(replacement_output));
 				cell->type = "$lut";
-				cell->setPort("\\A", { cell->getPort("\\I0"), inbit[0], inbit[1], cell->getPort("\\I3") });
+				auto I3 = get_bit_or_zero(cell->getPort(cell->getParam(ID(I3_IS_CI)).as_bool() ? ID(CI) : ID(I3)));
+				cell->setPort("\\A", { I3, inbit[1], inbit[0], get_bit_or_zero(cell->getPort("\\I0")) });
 				cell->setPort("\\Y", cell->getPort("\\O"));
 				cell->unsetPort("\\B");
 				cell->unsetPort("\\CI");
@@ -146,6 +149,7 @@ static void run_ice40_opts(Module *module)
 				cell->unsetPort("\\CO");
 				cell->unsetPort("\\O");
 				cell->setParam("\\WIDTH", 4);
+				cell->unsetParam("\\I3_IS_CI");
 			}
 			continue;
 		}
diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index ed7a16c08..d92e40726 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -65,7 +65,7 @@ struct SynthIce40Pass : public ScriptPass
 		log("        do not flatten design before synthesis\n");
 		log("\n");
 		log("    -retime\n");
-		log("        run 'abc' with -dff option\n");
+		log("        run 'abc' with '-dff -D 1' options\n");
 		log("\n");
 		log("    -nocarry\n");
 		log("        do not use SB_CARRY cells in output netlist\n");
@@ -102,8 +102,8 @@ struct SynthIce40Pass : public ScriptPass
 		log("\n");
 	}
 
-	string top_opt, blif_file, edif_file, json_file, abc, device_opt;
-	bool nocarry, nodffe, nobram, dsp, flatten, retime, noabc, abc2, vpr;
+	string top_opt, blif_file, edif_file, json_file, device_opt;
+	bool nocarry, nodffe, nobram, dsp, flatten, retime, noabc, abc2, vpr, abc9;
 	int min_ce_use;
 
 	void clear_flags() YS_OVERRIDE
@@ -122,7 +122,7 @@ struct SynthIce40Pass : public ScriptPass
 		noabc = false;
 		abc2 = false;
 		vpr = false;
-		abc = "abc";
+		abc9 = false;
 		device_opt = "hx";
 	}
 
@@ -207,7 +207,7 @@ struct SynthIce40Pass : public ScriptPass
 				continue;
 			}
 			if (args[argidx] == "-abc9") {
-				abc = "abc9";
+				abc9 = true;
 				continue;
 			}
 			if (args[argidx] == "-device" && argidx+1 < args.size()) {
@@ -223,7 +223,7 @@ struct SynthIce40Pass : public ScriptPass
 		if (device_opt != "hx" && device_opt != "lp" && device_opt !="u")
 			log_cmd_error("Invalid or no device specified: '%s'\n", device_opt.c_str());
 
-		if (abc == "abc9" && retime)
+		if (abc9 && retime)
 			log_cmd_error("-retime option not currently compatible with -abc9!\n");
 
 		log_header(design, "Executing SYNTH_ICE40 pass.\n");
@@ -273,7 +273,8 @@ struct SynthIce40Pass : public ScriptPass
 			run("opt_expr");
 			run("opt_clean");
 			if (help_mode || dsp) {
-				run("memory_dff");
+				run("memory_dff"); // ice40_dsp will merge registers, reserve memory port registers first
+				run("wreduce t:$mul");
 				run("techmap -map +/mul2dsp.v -map +/ice40/dsp_map.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 "
 						"-D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 -D DSP_Y_MINWIDTH=11 "
 						"-D DSP_NAME=$__MUL16X16", "(if -dsp)");
@@ -316,7 +317,7 @@ struct SynthIce40Pass : public ScriptPass
 				run("techmap -map +/techmap.v -map +/ice40/arith_map.v");
 			}
 			if (retime || help_mode)
-				run(abc + " -dff", "(only if -retime)");
+				run("abc -dff -D 1", "(only if -retime)");
 			run("ice40_opt");
 		}
 
@@ -340,7 +341,7 @@ struct SynthIce40Pass : public ScriptPass
 		if (check_label("map_luts"))
 		{
 			if (abc2 || help_mode) {
-				run(abc, "      (only if -abc2)");
+				run("abc", "      (only if -abc2)");
 				run("ice40_opt", "(only if -abc2)");
 			}
 			run("techmap -map +/ice40/latches_map.v");
@@ -349,7 +350,7 @@ struct SynthIce40Pass : public ScriptPass
 				run("techmap -map +/gate2lut.v -D LUT_WIDTH=4", "(only if -noabc)");
 			}
 			if (!noabc) {
-				if (abc == "abc9") {
+				if (abc9) {
 					run("read_verilog -icells -lib +/ice40/abc9_model.v");
 					int wire_delay;
 					if (device_opt == "lp")
@@ -358,10 +359,10 @@ struct SynthIce40Pass : public ScriptPass
 						wire_delay = 750;
 					else
 						wire_delay = 250;
-					run(abc + stringf(" -W %d -lut +/ice40/abc9_%s.lut -box +/ice40/abc9_%s.box", wire_delay, device_opt.c_str(), device_opt.c_str()), "(skip if -noabc)");
+					run(stringf("abc9 -W %d -lut +/ice40/abc9_%s.lut -box +/ice40/abc9_%s.box", wire_delay, device_opt.c_str(), device_opt.c_str()));
 				}
 				else
-					run(abc + " -dress -lut 4", "(skip if -noabc)");
+					run("abc -dress -lut 4", "(skip if -noabc)");
 			}
 			run("ice40_wrapcarry -unwrap");
 			run("techmap -D NO_LUT -map +/ice40/cells_map.v");