From 8d6d5c30d9f39ce5b15d1bd3f3a528b38f2f9f9c Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Fri, 31 Jul 2015 10:40:09 +0200
Subject: Added WORDS parameter to $meminit

---
 passes/memory/memory_unpack.cc | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

(limited to 'passes/memory/memory_unpack.cc')

diff --git a/passes/memory/memory_unpack.cc b/passes/memory/memory_unpack.cc
index c07c4b60c..07ec4564c 100644
--- a/passes/memory/memory_unpack.cc
+++ b/passes/memory/memory_unpack.cc
@@ -77,6 +77,10 @@ void handle_memory(RTLIL::Module *module, RTLIL::Cell *memory)
 	}
 
 	Const initval = memory->parameters.at("\\INIT");
+	RTLIL::Cell *last_init_cell = nullptr;
+	SigSpec last_init_data;
+	int last_init_addr;
+
 	for (int i = 0; i < GetSize(initval) && i/mem->width < (1 << abits); i += mem->width) {
 		Const val = initval.extract(i, mem->width, State::Sx);
 		for (auto bit : val.bits)
@@ -84,15 +88,29 @@ void handle_memory(RTLIL::Module *module, RTLIL::Cell *memory)
 				goto found_non_undef_initval;
 		continue;
 	found_non_undef_initval:
-		RTLIL::Cell *cell = module->addCell(NEW_ID, "$meminit");
-		cell->parameters["\\MEMID"] = mem_name.str();
-		cell->parameters["\\ABITS"] = memory->parameters.at("\\ABITS");
-		cell->parameters["\\WIDTH"] = memory->parameters.at("\\WIDTH");
-		cell->parameters["\\PRIORITY"] = i/mem->width;
-		 cell->setPort("\\ADDR", SigSpec(i/mem->width, abits));
-		cell->setPort("\\DATA", val);
+		if (last_init_cell && last_init_addr+1 == i/mem->width) {
+			last_init_cell->parameters["\\WORDS"] = last_init_cell->parameters["\\WORDS"].as_int() + 1;
+			last_init_data.append(val);
+			last_init_addr++;
+		} else {
+			if (last_init_cell)
+				last_init_cell->setPort("\\DATA", last_init_data);
+			RTLIL::Cell *cell = module->addCell(NEW_ID, "$meminit");
+			cell->parameters["\\MEMID"] = mem_name.str();
+			cell->parameters["\\ABITS"] = memory->parameters.at("\\ABITS");
+			cell->parameters["\\WIDTH"] = memory->parameters.at("\\WIDTH");
+			cell->parameters["\\WORDS"] = 1;
+			cell->parameters["\\PRIORITY"] = i/mem->width;
+			cell->setPort("\\ADDR", SigSpec(i/mem->width, abits));
+			last_init_cell = cell;
+			last_init_addr = i/mem->width;
+			last_init_data = val;
+		}
 	}
 
+	if (last_init_cell)
+		last_init_cell->setPort("\\DATA", last_init_data);
+
 	module->remove(memory);
 }
 
-- 
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