From fc3b3c4ec3955b165166d9f44965fac0e1879505 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Fri, 7 Feb 2014 17:44:57 +0100 Subject: [PATCH] Added $slice and $concat cell types --- backends/verilog/verilog_backend.cc | 22 +++++++++++++++++++++ kernel/celltypes.h | 19 ++++++++++++++---- kernel/rtlil.cc | 18 +++++++++++++++++ kernel/satgen.h | 21 ++++++++++++++++++++ manual/CHAPTER_CellLib.tex | 4 ++++ passes/techmap/simplemap.cc | 18 +++++++++++++++++ techlibs/common/simlib.v | 30 +++++++++++++++++++++++++++++ techlibs/common/stdcells.v | 12 ++++++++++++ 8 files changed, 140 insertions(+), 4 deletions(-) diff --git a/backends/verilog/verilog_backend.cc b/backends/verilog/verilog_backend.cc index d8160c97b..d7fe4c4e2 100644 --- a/backends/verilog/verilog_backend.cc +++ b/backends/verilog/verilog_backend.cc @@ -571,6 +571,28 @@ bool dump_cell_expr(FILE *f, std::string indent, RTLIL::Cell *cell) return true; } + if (cell->type == "$slice") + { + fprintf(f, "%s" "assign ", indent.c_str()); + dump_sigspec(f, cell->connections["\\Y"]); + fprintf(f, " = "); + dump_sigspec(f, cell->connections["\\A"]); + fprintf(f, " >> %d;\n", cell->parameters.at("\\OFFSET").as_int()); + return true; + } + + if (cell->type == "$concat") + { + fprintf(f, "%s" "assign ", indent.c_str()); + dump_sigspec(f, cell->connections["\\Y"]); + fprintf(f, " = { "); + dump_sigspec(f, cell->connections["\\B"]); + fprintf(f, " , "); + dump_sigspec(f, cell->connections["\\A"]); + fprintf(f, " };\n"); + return true; + } + if (cell->type == "$dff" || cell->type == "$adff") { RTLIL::SigSpec sig_clk, sig_arst, val_arst; diff --git a/kernel/celltypes.h b/kernel/celltypes.h index 9e63e9d1b..24504aee8 100644 --- a/kernel/celltypes.h +++ b/kernel/celltypes.h @@ -270,6 +270,20 @@ struct CellTypes static RTLIL::Const eval(RTLIL::Cell *cell, const RTLIL::Const &arg1, const RTLIL::Const &arg2) { + if (cell->type == "$slice") { + RTLIL::Const ret; + int width = cell->parameters.at("\\Y_WIDTH").as_int(); + int offset = cell->parameters.at("\\OFFSET").as_int(); + ret.bits.insert(ret.bits.end(), arg1.bits.begin()+offset, arg1.bits.begin()+offset+width); + return ret; + } + + if (cell->type == "$concat") { + RTLIL::Const ret = arg1; + ret.bits.insert(ret.bits.end(), arg2.bits.begin(), arg2.bits.end()); + return ret; + } + bool signed_a = cell->parameters.count("\\A_SIGNED") > 0 && cell->parameters["\\A_SIGNED"].as_bool(); bool signed_b = cell->parameters.count("\\B_SIGNED") > 0 && cell->parameters["\\B_SIGNED"].as_bool(); int result_len = cell->parameters.count("\\Y_WIDTH") > 0 ? cell->parameters["\\Y_WIDTH"].as_int() : -1; @@ -289,10 +303,7 @@ struct CellTypes } assert(sel.bits.size() == 0); - bool signed_a = cell->parameters.count("\\A_SIGNED") > 0 && cell->parameters["\\A_SIGNED"].as_bool(); - bool signed_b = cell->parameters.count("\\B_SIGNED") > 0 && cell->parameters["\\B_SIGNED"].as_bool(); - int result_len = cell->parameters.count("\\Y_WIDTH") > 0 ? cell->parameters["\\Y_WIDTH"].as_int() : -1; - return eval(cell->type, arg1, arg2, signed_a, signed_b, result_len); + return eval(cell, arg1, arg2); } }; diff --git a/kernel/rtlil.cc b/kernel/rtlil.cc index 12aa35df3..4c944c93c 100644 --- a/kernel/rtlil.cc +++ b/kernel/rtlil.cc @@ -462,6 +462,24 @@ namespace { return; } + if (cell->type == "$slice") { + param("\\OFFSET"); + port("\\A", param("\\A_WIDTH")); + port("\\Y", param("\\Y_WIDTH")); + if (param("\\OFFSET") + param("\\Y_WIDTH") > param("\\A_WIDTH")) + error(__LINE__); + check_expected(); + return; + } + + if (cell->type == "$concat") { + port("\\A", param("\\A_WIDTH")); + port("\\B", param("\\B_WIDTH")); + port("\\Y", param("\\A_WIDTH") + param("\\B_WIDTH")); + check_expected(); + return; + } + if (cell->type == "$mux") { port("\\A", param("\\WIDTH")); port("\\B", param("\\WIDTH")); diff --git a/kernel/satgen.h b/kernel/satgen.h index 473aa6166..840700cbd 100644 --- a/kernel/satgen.h +++ b/kernel/satgen.h @@ -761,6 +761,27 @@ struct SatGen return true; } + if (cell->type == "$slice") + { + RTLIL::SigSpec a = cell->connections.at("\\A"); + RTLIL::SigSpec y = cell->connections.at("\\Y"); + ez->assume(signals_eq(a.extract(cell->parameters.at("\\OFFSET").as_int(), y.width), y, timestep)); + return true; + } + + if (cell->type == "$concat") + { + RTLIL::SigSpec a = cell->connections.at("\\A"); + RTLIL::SigSpec b = cell->connections.at("\\B"); + RTLIL::SigSpec y = cell->connections.at("\\Y"); + + RTLIL::SigSpec ab = a; + ab.append(b); + + ez->assume(signals_eq(ab, y, timestep)); + return true; + } + if (timestep > 0 && (cell->type == "$dff" || cell->type == "$_DFF_N_" || cell->type == "$_DFF_P_")) { if (timestep == 1) diff --git a/manual/CHAPTER_CellLib.tex b/manual/CHAPTER_CellLib.tex index c8c2b6c6c..e7895521a 100644 --- a/manual/CHAPTER_CellLib.tex +++ b/manual/CHAPTER_CellLib.tex @@ -429,3 +429,7 @@ using the {\tt abc} pass. Add information about {\tt \$assert} cells. \end{fixme} +\begin{fixme} +Add information about {\tt \$slice} and {\tt \$concat} cells. +\end{fixme} + diff --git a/passes/techmap/simplemap.cc b/passes/techmap/simplemap.cc index e06a80bbd..e67b1e055 100644 --- a/passes/techmap/simplemap.cc +++ b/passes/techmap/simplemap.cc @@ -312,6 +312,22 @@ static void simplemap_mux(RTLIL::Module *module, RTLIL::Cell *cell) } } +static void simplemap_slice(RTLIL::Module *module, RTLIL::Cell *cell) +{ + int offset = cell->parameters.at("\\OFFSET").as_int(); + RTLIL::SigSpec sig_a = cell->connections.at("\\A"); + RTLIL::SigSpec sig_y = cell->connections.at("\\Y"); + module->connections.push_back(RTLIL::SigSig(sig_y, sig_a.extract(offset, sig_y.width))); +} + +static void simplemap_concat(RTLIL::Module *module, RTLIL::Cell *cell) +{ + RTLIL::SigSpec sig_ab = cell->connections.at("\\A"); + sig_ab.append(cell->connections.at("\\B")); + RTLIL::SigSpec sig_y = cell->connections.at("\\Y"); + module->connections.push_back(RTLIL::SigSig(sig_y, sig_ab)); +} + static void simplemap_sr(RTLIL::Module *module, RTLIL::Cell *cell) { int width = cell->parameters.at("\\WIDTH").as_int(); @@ -480,6 +496,8 @@ void simplemap_get_mappers(std::map> OFFSET; + +endmodule + +// -------------------------------------------------------- + +module \$concat (A, B, Y); + +parameter A_WIDTH = 0; +parameter B_WIDTH = 0; + +input [A_WIDTH-1:0] A; +input [B_WIDTH-1:0] B; +output [A_WIDTH+B_WIDTH-1:0] Y; + +assign Y = {B, A}; + +endmodule + +// -------------------------------------------------------- + module \$mux (A, B, S, Y); parameter WIDTH = 0; diff --git a/techlibs/common/stdcells.v b/techlibs/common/stdcells.v index e33e651ca..fdee26b6f 100644 --- a/techlibs/common/stdcells.v +++ b/techlibs/common/stdcells.v @@ -956,6 +956,18 @@ endmodule // -------------------------------------------------------- +(* techmap_simplemap *) +module \$slice ; +endmodule + +// -------------------------------------------------------- + +(* techmap_simplemap *) +module \$concat ; +endmodule + +// -------------------------------------------------------- + (* techmap_simplemap *) module \$mux ; endmodule -- 2.30.2