From 95757efb25dc51a73b384b475b0fc87d0e11d10e Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Fri, 17 Jun 2016 16:31:16 +0200
Subject: Improved support for $sop cells

---
 passes/techmap/simplemap.cc | 31 +++++++++++++++++++++++++++++++
 passes/tests/test_cell.cc   | 40 ++++++++++++++++++++++++++++++++++++++--
 2 files changed, 69 insertions(+), 2 deletions(-)

(limited to 'passes')

diff --git a/passes/techmap/simplemap.cc b/passes/techmap/simplemap.cc
index 777e80142..0fb647344 100644
--- a/passes/techmap/simplemap.cc
+++ b/passes/techmap/simplemap.cc
@@ -321,6 +321,36 @@ void simplemap_lut(RTLIL::Module *module, RTLIL::Cell *cell)
 	module->connect(cell->getPort("\\Y"), lut_data);
 }
 
+void simplemap_sop(RTLIL::Module *module, RTLIL::Cell *cell)
+{
+	SigSpec ctrl = cell->getPort("\\A");
+	SigSpec table = cell->getParam("\\TABLE");
+
+	int width = cell->getParam("\\WIDTH").as_int();
+	int depth = cell->getParam("\\DEPTH").as_int();
+	table.extend_u0(2 * width * depth);
+
+	SigSpec products;
+
+	for (int i = 0; i < depth; i++) {
+		SigSpec in, pat;
+		for (int j = 0; j < width; j++) {
+			if (table[2*i*width + 2*j + 0] == State::S1) {
+				in.append(ctrl[j]);
+				pat.append(State::S0);
+			}
+			if (table[2*i*width + 2*j + 1] == State::S1) {
+				in.append(ctrl[j]);
+				pat.append(State::S1);
+			}
+		}
+
+		products.append(GetSize(in) > 0 ? module->Eq(NEW_ID, in, pat) : State::S1);
+	}
+
+	module->connect(cell->getPort("\\Y"), module->ReduceOr(NEW_ID, products));
+}
+
 void simplemap_slice(RTLIL::Module *module, RTLIL::Cell *cell)
 {
 	int offset = cell->parameters.at("\\OFFSET").as_int();
@@ -498,6 +528,7 @@ void simplemap_get_mappers(std::map<RTLIL::IdString, void(*)(RTLIL::Module*, RTL
 	mappers["$mux"]         = simplemap_mux;
 	mappers["$tribuf"]      = simplemap_tribuf;
 	mappers["$lut"]         = simplemap_lut;
+	mappers["$sop"]         = simplemap_sop;
 	mappers["$slice"]       = simplemap_slice;
 	mappers["$concat"]      = simplemap_concat;
 	mappers["$sr"]          = simplemap_sr;
diff --git a/passes/tests/test_cell.cc b/passes/tests/test_cell.cc
index a8fcac9bc..8b800d414 100644
--- a/passes/tests/test_cell.cc
+++ b/passes/tests/test_cell.cc
@@ -164,6 +164,41 @@ static void create_gold_module(RTLIL::Design *design, RTLIL::IdString cell_type,
 		cell->setParam("\\LUT", config.as_const());
 	}
 
+	if (cell_type == "$sop")
+	{
+		int width = 1 + xorshift32(8);
+		int depth = 1 + xorshift32(8);
+
+		wire = module->addWire("\\A");
+		wire->width = width;
+		wire->port_input = true;
+		cell->setPort("\\A", wire);
+
+		wire = module->addWire("\\Y");
+		wire->port_output = true;
+		cell->setPort("\\Y", wire);
+
+		RTLIL::SigSpec config;
+		for (int i = 0; i < width*depth; i++)
+			switch (xorshift32(3)) {
+				case 0:
+					config.append(RTLIL::S1);
+					config.append(RTLIL::S0);
+					break;
+				case 1:
+					config.append(RTLIL::S0);
+					config.append(RTLIL::S1);
+					break;
+				case 2:
+					config.append(RTLIL::S0);
+					config.append(RTLIL::S0);
+					break;
+			}
+
+		cell->setParam("\\DEPTH", depth);
+		cell->setParam("\\TABLE", config.as_const());
+	}
+
 	if (cell_type_flags.find('A') != std::string::npos) {
 		wire = module->addWire("\\A");
 		wire->width = 1 + xorshift32(8);
@@ -534,7 +569,7 @@ struct TestCellPass : public Pass {
 		log("        pass this option to techmap.\n");
 		log("\n");
 		log("    -simlib\n");
-		log("        use \"techmap -map +/simlib.v -max_iter 2 -autoproc\"\n");
+		log("        use \"techmap -D SIMLIB_NOCHECKS -map +/simlib.v -max_iter 2 -autoproc\"\n");
 		log("\n");
 		log("    -aigmap\n");
 		log("        instead of calling \"techmap\", call \"aigmap\"\n");
@@ -604,7 +639,7 @@ struct TestCellPass : public Pass {
 				continue;
 			}
 			if (args[argidx] == "-simlib") {
-				techmap_cmd = "techmap -map +/simlib.v -max_iter 2 -autoproc";
+				techmap_cmd = "techmap -D SIMLIB_NOCHECKS -map +/simlib.v -max_iter 2 -autoproc";
 				continue;
 			}
 			if (args[argidx] == "-aigmap") {
@@ -697,6 +732,7 @@ struct TestCellPass : public Pass {
 		// cell_types["$assert"] = "A";
 
 		cell_types["$lut"] = "*";
+		cell_types["$sop"] = "*";
 		cell_types["$alu"] = "ABSY";
 		cell_types["$lcu"] = "*";
 		cell_types["$macc"] = "*";
-- 
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