From: Ahmed Irfan <irfan@ubuntu.(none)>
Date: Tue, 11 Feb 2014 12:06:01 +0000 (+0100)
Subject: added concat and slice cell translation
X-Git-Tag: yosys-0.2.0~18^2^2~4
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e8f6b8f201c0ead8c17f9c9ae4de3e859e9e13ef;p=yosys.git

added concat and slice cell translation
---

diff --git a/backends/btor/btor.cc b/backends/btor/btor.cc
index 80a2da1fb..2c8546f05 100644
--- a/backends/btor/btor.cc
+++ b/backends/btor/btor.cc
@@ -133,6 +133,10 @@ struct BtorDumper
 		cell_type_translation["$dffsr"] = "next";
 		//memories
 		//nothing here
+		//slice
+		cell_type_translation["$slice"] = "slice";
+		//concat
+		cell_type_translation["$concat"] = "concat";
 
 		//signed cell type translation 
 		//binary
@@ -350,39 +354,25 @@ struct BtorDumper
 		if (expected_width != s.width)
 		{
 			log(" - changing width of sigspec\n");
-			//TODO: save the new signal in map
-			/*if(expected_width > s.width)
-				s.extend_u0(expected_width);
-			else if (expected_width < s.width)
-				s = s.extract(0, expected_width);
-			
-			it = sig_ref.find(s);
-			if(it == std::end(sig_ref))
-			{*/
-				if(expected_width > s.width)
-				{
-					//TODO: case the signal is signed
-					++line_num;
-					str = stringf ("%d zero %d", line_num, expected_width - s.width);
-					fprintf(f, "%s\n", str.c_str());
-					++line_num;
-					str = stringf ("%d concat %d %d %d", line_num, expected_width, line_num-1, l);
-					fprintf(f, "%s\n", str.c_str());
-					l = line_num;
-				}
-				else if(expected_width < s.width)
-				{
-					++line_num;
-					str = stringf ("%d slice %d %d %d %d;3", line_num, expected_width, l, expected_width-1, 0);
-					fprintf(f, "%s\n", str.c_str());
-					l = line_num;
-				}
-				/*sig_ref[s] = l;
+			//TODO: this block may not be needed anymore, due to explicit type conversion by "splice" command
+			if(expected_width > s.width)
+			{
+				//TODO: case the signal is signed
+				++line_num;
+				str = stringf ("%d zero %d", line_num, expected_width - s.width);
+				fprintf(f, "%s\n", str.c_str());
+				++line_num;
+				str = stringf ("%d concat %d %d %d", line_num, expected_width, line_num-1, l);
+				fprintf(f, "%s\n", str.c_str());
+				l = line_num;
 			}
-			else
+			else if(expected_width < s.width)
 			{
-				l = it->second;
-			}*/
+				++line_num;
+				str = stringf ("%d slice %d %d %d %d;3", line_num, expected_width, l, expected_width-1, 0);
+				fprintf(f, "%s\n", str.c_str());
+				l = line_num;
+			}
 		}
 		assert(l>0);
 		return l;
@@ -657,7 +647,7 @@ struct BtorDumper
 				log(" - width is %d\n", output_width);
 				int cond = dump_sigspec(&cell->connections.at(RTLIL::IdString("\\CLK")), 1);
 				bool polarity = cell->parameters.at(RTLIL::IdString("\\CLK_POLARITY")).as_bool();
-				const RTLIL::SigSpec* cell_output = &cell->connections.at(RTLIL::IdString("\\Q"));
+				const RTLIL::SigSpec* cell_output = &cell->connections.at(RTLIL::IdString("\\D"));
 				int value = dump_sigspec(&cell->connections.at(RTLIL::IdString("\\D")), output_width);
 				unsigned start_bit = 0;
 				for(unsigned i=0; i<cell_output->chunks.size(); ++i)
@@ -765,6 +755,39 @@ struct BtorDumper
 				fprintf(f, "%s\n", str.c_str());				
 				line_ref[cell->name]=line_num;
 			}
+			else if(cell->type == "$slice")
+			{
+				log("writing slice cell\n");
+				const RTLIL::SigSpec* input = &cell->connections.at(RTLIL::IdString("\\A"));
+				int input_width = cell->parameters.at(RTLIL::IdString("\\A_WIDTH")).as_int();
+				assert(input->width == input_width);
+				int input_line = dump_sigspec(input, input_width);
+				const RTLIL::SigSpec* output = &cell->connections.at(RTLIL::IdString("\\Y"));
+				int output_width = cell->parameters.at(RTLIL::IdString("\\Y_WIDTH")).as_int();
+				assert(output->width == output_width);
+				int offset = cell->parameters.at(RTLIL::IdString("\\OFFSET")).as_int();	
+				++line_num;
+				str = stringf("%d %s %d %d %d %d", line_num, cell_type_translation.at(cell->type).c_str(), output_width, input_line, output_width+offset-1, offset);	
+				fprintf(f, "%s\n", str.c_str());				
+				line_ref[cell->name]=line_num;	
+			}
+			else if(cell->type == "$concat")
+			{
+				log("writing concat cell\n");
+				const RTLIL::SigSpec* input_a = &cell->connections.at(RTLIL::IdString("\\A"));
+				int input_a_width = cell->parameters.at(RTLIL::IdString("\\A_WIDTH")).as_int();
+				assert(input_a->width == input_a_width);
+				int input_a_line = dump_sigspec(input_a, input_a_width);
+				const RTLIL::SigSpec* input_b = &cell->connections.at(RTLIL::IdString("\\B"));
+				int input_b_width = cell->parameters.at(RTLIL::IdString("\\B_WIDTH")).as_int();
+				assert(input_b->width == input_b_width);
+				int input_b_line = dump_sigspec(input_b, input_b_width);
+				++line_num;
+				str = stringf("%d %s %d %d %d", line_num, cell_type_translation.at(cell->type).c_str(), input_a_width+input_b_width, 
+					input_a_line, input_b_line);	
+				fprintf(f, "%s\n", str.c_str());				
+				line_ref[cell->name]=line_num;				
+			}
 			curr_cell.clear();
 			return line_num;
 		}
diff --git a/backends/btor/btor.ys b/backends/btor/btor.ys
index 20bce87e1..e58db8a38 100644
--- a/backends/btor/btor.ys
+++ b/backends/btor/btor.ys
@@ -1,9 +1,9 @@
 proc; 
-opt; opt_const -mux_undef; opt;
+opt; opt_const -mux_undef; splice; opt;
 rename -hide;;;
 #converting pmux to mux
 techmap -share_map pmux2mux.v;;
-memory -nomap;;
+memory_dff -wr_only; memory_collect;;
 #flatten design
 flatten;;
 #converting asyn memory write to syn memory
diff --git a/backends/btor/verilog2btor.sh b/backends/btor/verilog2btor.sh
index 06a32c81d..6485b6db8 100755
--- a/backends/btor/verilog2btor.sh
+++ b/backends/btor/verilog2btor.sh
@@ -22,10 +22,10 @@ hierarchy -top $3;
 hierarchy -libdir $DIR; 
 hierarchy -check; 
 proc; 
-opt; opt_const -mux_undef; opt;
+opt; opt_const -mux_undef; splice; opt;
 rename -hide;;;
 techmap -share_map pmux2mux.v;;
-memory_dff -wr_only
+memory_dff -wr_only;
 memory_collect;;
 flatten;;
 memory_unpack;