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Diffstat (limited to 'passes/techmap/pmux2shiftx.cc')
-rw-r--r-- | passes/techmap/pmux2shiftx.cc | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/passes/techmap/pmux2shiftx.cc b/passes/techmap/pmux2shiftx.cc deleted file mode 100644 index f8cdf5783..000000000 --- a/passes/techmap/pmux2shiftx.cc +++ /dev/null @@ -1,82 +0,0 @@ -/* - * yosys -- Yosys Open SYnthesis Suite - * - * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - */ - -#include "kernel/yosys.h" -#include "kernel/sigtools.h" - -USING_YOSYS_NAMESPACE -PRIVATE_NAMESPACE_BEGIN - -struct Pmux2ShiftxPass : public Pass { - Pmux2ShiftxPass() : Pass("pmux2shiftx", "transform $pmux cells to $shiftx cells") { } - void help() YS_OVERRIDE - { - // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| - log("\n"); - log(" pmux2shiftx [selection]\n"); - log("\n"); - log("This pass transforms $pmux cells to $shiftx cells.\n"); - log("\n"); - } - void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE - { - log_header(design, "Executing PMUX2SHIFTX pass.\n"); - - size_t argidx; - for (argidx = 1; argidx < args.size(); argidx++) { - break; - } - extra_args(args, argidx, design); - - for (auto module : design->selected_modules()) - for (auto cell : module->selected_cells()) - { - if (cell->type != "$pmux") - continue; - - // Create a new encoder, out of a $pmux, that takes - // the existing pmux's 'S' input and transforms it - // back into a binary value - RTLIL::SigSpec shiftx_a; - RTLIL::SigSpec pmux_s; - - int s_width = cell->getParam("\\S_WIDTH").as_int(); - if (!cell->getPort("\\A").is_fully_undef()) { - ++s_width; - shiftx_a.append(cell->getPort("\\A")); - pmux_s.append(module->Not(NEW_ID, module->ReduceOr(NEW_ID, cell->getPort("\\S")))); - } - const int clog2width = ceil(log2(s_width)); - - RTLIL::SigSpec pmux_b; - pmux_b.append(RTLIL::Const(0, clog2width)); - for (int i = s_width-1; i > 0; i--) - pmux_b.append(RTLIL::Const(i, clog2width)); - shiftx_a.append(cell->getPort("\\B")); - pmux_s.append(cell->getPort("\\S")); - - RTLIL::SigSpec pmux_y = module->addWire(NEW_ID, clog2width); - module->addPmux(NEW_ID, RTLIL::Const(RTLIL::Sx, clog2width), pmux_b, pmux_s, pmux_y); - module->addShiftx(NEW_ID, shiftx_a, pmux_y, cell->getPort("\\Y")); - module->remove(cell); - } - } -} Pmux2ShiftxPass; - -PRIVATE_NAMESPACE_END |