dsp_ff-plugin/nexus-dsp_rules.txt

# Copyright (C) 2020-2022  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

dsp MULT9X9 MULT18X18 MULT18X36 MULT36X36
  port A
    clk CLK 0
    rst RSTA 0
    ena CEA 1

    set REGINPUTA=REGISTER
    map GSR=GSR
  endport
  port B
    clk CLK 0
    rst RSTB 0
    ena CEB 1

    set REGINPUTB=REGISTER
    map GSR=GSR
  endport
  port Z
    clk CLK 0
    rst RSTOUT 0
    ena CEOUT 1

    set REGOUTPUT=REGISTER
    map GSR=GSR
  endport
enddsp

dsp MULTPREADD9X9 MULTPREADD18X18 MULTADDSUB18X18 MULTADDSUB36X36
  port A
    clk CLK 0
    rst RSTA 0
    ena CEA 1

    set REGINPUTA=REGISTER
    map GSR=GSR
  endport
  port B
    clk CLK 0
    rst RSTB 0
    ena CEB 1

    set REGINPUTB=REGISTER
    map GSR=GSR
  endport
  port C
    clk CLK 0
    rst RSTC 0
    ena CEC 1

    set REGINPUTC=REGISTER
    map GSR=GSR
  endport
  port Z
    clk CLK 0
    rst RSTOUT 0
    ena CEOUT 1

    set REGOUTPUT=REGISTER
    map GSR=GSR
  endport
enddsp

# TODO: Uncomment when support for multiple port registers controlled by
# a common parameter is added:

#dsp MULTADDSUB9X9WIDE
#  port A0
#    clk CLK 0
#    rst RSTA0A1 0
#    ena CEA0A1 1
#
#    set REGINPUTAB0=REGISTER
#    map GSR=GSR
#  endport
#  port A1
#    clk CLK 0
#    rst RSTA0A1 0
#    ena CEA0A1 1
#
#    set REGINPUTAB1=REGISTER
#    map GSR=GSR
#  endport
#  port A2
#    clk CLK 0
#    rst RSTA2A3 0
#    ena CEA2A3 1
#
#    set REGINPUTAB2=REGISTER
#    map GSR=GSR
#  endport
#  port A3
#    clk CLK 0
#    rst RSTA2A3 0
#    ena CEA2A3 1
#
#    set REGINPUTAB3=REGISTER
#    map GSR=GSR
#  endport
#  port B0
#    clk CLK 0
#    rst RSTB0B1 0
#    ena CEB0B1 1
#
#    set REGINPUTAB0=REGISTER
#    map GSR=GSR
#  endport
#  port B1
#    clk CLK 0
#    rst RSTB0B1 0
#    ena CEB0B1 1
#
#    set REGINPUTAB1=REGISTER
#    map GSR=GSR
#  endport
#  port B2
#    clk CLK 0
#    rst RSTB2B3 0
#    ena CEB2B3 1
#
#    set REGINPUTAB2=REGISTER
#    map GSR=GSR
#  endport
#  port B3
#    clk CLK 0
#    rst RSTB2B3 0
#    ena CEB2B3 1
#
#    set REGINPUTAB3=REGISTER
#    map GSR=GSR
#  endport
#  port C
#    clk CLK 0
#    rst RSTC0
#    ena CEC 1
#
#    set REGINPUTC=REGISTER
#    map GSR=GSR
#  endport
#  port Z
#    clk CLK 0
#    rst RSTOUT 0
#    ena CEOUT 1
#
#    set REGOUTPUT=REGISTER
#    map GSR=GSR
#  endport
#enddsp

ff FD1P3DX
  clk CK
  rst CD
  ena SP
  d   D
  q   Q

  match GSR
  set RESETMODE=ASYNC
endff

ff FD1P3IX
  clk CK
  rst CD
  ena SP
  d   D
  q   Q

  match GSR
  set RESETMODE=SYNC
endff