ql-qlf-plugin/pp3/abc9_map.v

// Copyright (C) 2020-2021  The SymbiFlow Authors.
//
// Use of this source code is governed by a ISC-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/ISC
//
// SPDX-License-Identifier:ISC

// This file exists to map purely-synchronous flops to ABC9 flops, while 
// mapping flops with asynchronous-set/clear as boxes, this is because ABC9 
// doesn't support asynchronous-set/clear flops in sequential synthesis.

module dffepc (
  output Q,
  input D,
  input CLK,
  input EN,
  input CLR,
  input PRE
);

parameter INIT = 1'b0;

parameter _TECHMAP_CONSTMSK_CLR_ = 1'b0;
parameter _TECHMAP_CONSTMSK_PRE_ = 1'b0;
parameter _TECHMAP_CONSTVAL_CLR_ = 1'b0;
parameter _TECHMAP_CONSTVAL_PRE_ = 1'b0;

if (_TECHMAP_CONSTMSK_CLR_ != 1'b0 && _TECHMAP_CONSTMSK_PRE_ != 1'b0 && _TECHMAP_CONSTVAL_CLR_ == 1'b0 && _TECHMAP_CONSTVAL_PRE_ == 1'b0)
    $__PP3_DFFEPC_SYNCONLY _TECHMAP_REPLACE_ (.Q(Q), .D(D), .CLK(CLK), .EN(EN));
else
    wire _TECHMAP_FAIL_ = 1;

endmodule