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676 lines
14 KiB
Verilog
676 lines
14 KiB
Verilog
// © IBM Corp. 2020
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// Licensed under the Apache License, Version 2.0 (the "License"), as modified by
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// the terms below; you may not use the files in this repository except in
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// compliance with the License as modified.
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// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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//
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// Modified Terms:
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//
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// 1) For the purpose of the patent license granted to you in Section 3 of the
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// License, the "Work" hereby includes implementations of the work of authorship
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// in physical form.
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//
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// 2) Notwithstanding any terms to the contrary in the License, any licenses
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// necessary for implementation of the Work that are available from OpenPOWER
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// via the Power ISA End User License Agreement (EULA) are explicitly excluded
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// hereunder, and may be obtained from OpenPOWER under the terms and conditions
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// of the EULA.
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//
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// Unless required by applicable law or agreed to in writing, the reference design
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
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// for the specific language governing permissions and limitations under the License.
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//
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// Additional rights, including the ability to physically implement a softcore that
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// is compliant with the required sections of the Power ISA Specification, are
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// available at no cost under the terms of the OpenPOWER Power ISA EULA, which can be
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// obtained (along with the Power ISA) here: https://openpowerfoundation.org.
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`timescale 1 ns / 1 ns
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// *!****************************************************************
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// *! FILE NAME : tri_fu_mul_bthrow.vhdl
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// *! DESCRIPTION : Booth Decode
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// *!****************************************************************
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module tri_fu_mul_bthrow(
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x,
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s_neg,
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s_x,
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s_x2,
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hot_one,
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q
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);
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input [0:53] x;
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input s_neg; // negate the row
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input s_x; // shift by 1
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input s_x2; // shift by 2
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output hot_one; // lsb term for row below
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output [0:54] q; // final output
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// ENTITY
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parameter tiup = 1'b1;
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parameter tidn = 1'b0;
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wire [0:54] left;
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wire unused;
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assign unused = left[0]; // dangling pin from edge bit
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////###############################################################
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//# A row of the repeated part of the booth_mux row
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////###############################################################
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tri_fu_mul_bthmux u00(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(tidn), //i-- ********
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.right(left[1]), //i-- [n+1]
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.left(left[0]), //o-- [n]
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.q(q[0]) //o--
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);
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tri_fu_mul_bthmux u01(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[0]), //i-- [n-1]
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.right(left[2]), //i-- [n+1]
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.left(left[1]), //o-- [n]
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.q(q[1]) //o--
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);
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tri_fu_mul_bthmux u02(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[1]), //i--
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.right(left[3]), //i--
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.left(left[2]), //o--
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.q(q[2]) //o--
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);
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tri_fu_mul_bthmux u03(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[2]), //i--
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.right(left[4]), //i--
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.left(left[3]), //o--
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.q(q[3]) //o--
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);
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tri_fu_mul_bthmux u04(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[3]), //i--
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.right(left[5]), //i--
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.left(left[4]), //o--
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.q(q[4]) //o--
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);
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tri_fu_mul_bthmux u05(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[4]), //i--
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.right(left[6]), //i--
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.left(left[5]), //o--
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.q(q[5]) //o--
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);
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tri_fu_mul_bthmux u06(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[5]), //i--
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.right(left[7]), //i--
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.left(left[6]), //o--
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.q(q[6]) //o--
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);
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tri_fu_mul_bthmux u07(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[6]), //i--
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.right(left[8]), //i--
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.left(left[7]), //o--
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.q(q[7]) //o--
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);
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tri_fu_mul_bthmux u08(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[7]), //i--
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.right(left[9]), //i--
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.left(left[8]), //o--
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.q(q[8]) //o--
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);
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tri_fu_mul_bthmux u09(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[8]), //i--
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.right(left[10]), //i--
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.left(left[9]), //o--
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.q(q[9]) //o--
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);
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tri_fu_mul_bthmux u10(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[9]), //i--
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.right(left[11]), //i--
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.left(left[10]), //o--
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.q(q[10]) //o--
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);
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tri_fu_mul_bthmux u11(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[10]), //i--
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.right(left[12]), //i--
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.left(left[11]), //o--
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.q(q[11]) //o--
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);
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tri_fu_mul_bthmux u12(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[11]), //i--
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.right(left[13]), //i--
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.left(left[12]), //o--
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.q(q[12]) //o--
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);
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tri_fu_mul_bthmux u13(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[12]), //i--
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.right(left[14]), //i--
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.left(left[13]), //o--
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.q(q[13]) //o--
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);
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tri_fu_mul_bthmux u14(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[13]), //i--
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.right(left[15]), //i--
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.left(left[14]), //o--
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.q(q[14]) //o--
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);
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tri_fu_mul_bthmux u15(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[14]), //i--
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.right(left[16]), //i--
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.left(left[15]), //o--
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.q(q[15]) //o--
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);
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tri_fu_mul_bthmux u16(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[15]), //i--
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.right(left[17]), //i--
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.left(left[16]), //o--
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.q(q[16]) //o--
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);
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tri_fu_mul_bthmux u17(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[16]), //i--
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.right(left[18]), //i--
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.left(left[17]), //o--
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.q(q[17]) //o--
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);
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tri_fu_mul_bthmux u18(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[17]), //i--
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.right(left[19]), //i--
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.left(left[18]), //o--
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.q(q[18]) //o--
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);
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tri_fu_mul_bthmux u19(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[18]), //i--
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.right(left[20]), //i--
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.left(left[19]), //o--
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.q(q[19]) //o--
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);
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tri_fu_mul_bthmux u20(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[19]), //i--
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.right(left[21]), //i--
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.left(left[20]), //o--
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.q(q[20]) //o--
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);
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tri_fu_mul_bthmux u21(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[20]), //i--
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.right(left[22]), //i--
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.left(left[21]), //o--
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.q(q[21]) //o--
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);
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tri_fu_mul_bthmux u22(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[21]), //i--
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.right(left[23]), //i--
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.left(left[22]), //o--
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.q(q[22]) //o--
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);
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tri_fu_mul_bthmux u23(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[22]), //i--
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.right(left[24]), //i--
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.left(left[23]), //o--
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.q(q[23]) //o--
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);
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tri_fu_mul_bthmux u24(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[23]), //i--
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.right(left[25]), //i--
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.left(left[24]), //o--
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.q(q[24]) //o--
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);
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tri_fu_mul_bthmux u25(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[24]), //i--
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.right(left[26]), //i--
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.left(left[25]), //o--
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.q(q[25]) //o--
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);
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tri_fu_mul_bthmux u26(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[25]), //i--
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.right(left[27]), //i--
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.left(left[26]), //o--
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.q(q[26]) //o--
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);
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tri_fu_mul_bthmux u27(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[26]), //i--
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.right(left[28]), //i--
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.left(left[27]), //o--
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.q(q[27]) //o--
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);
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tri_fu_mul_bthmux u28(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[27]), //i--
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.right(left[29]), //i--
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.left(left[28]), //o--
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.q(q[28]) //o--
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);
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tri_fu_mul_bthmux u29(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[28]), //i--
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.right(left[30]), //i--
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.left(left[29]), //o--
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.q(q[29]) //o--
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);
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tri_fu_mul_bthmux u30(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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.x(x[29]), //i--
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.right(left[31]), //i--
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.left(left[30]), //o--
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.q(q[30]) //o--
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);
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tri_fu_mul_bthmux u31(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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|
.x(x[30]), //i--
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.right(left[32]), //i--
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.left(left[31]), //o--
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.q(q[31]) //o--
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);
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tri_fu_mul_bthmux u32(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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|
.x(x[31]), //i--
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|
.right(left[33]), //i--
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.left(left[32]), //o--
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.q(q[32]) //o--
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);
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tri_fu_mul_bthmux u33(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
|
|
.x(x[32]), //i--
|
|
.right(left[34]), //i--
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|
.left(left[33]), //o--
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.q(q[33]) //o--
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);
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tri_fu_mul_bthmux u34(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
|
|
.x(x[33]), //i--
|
|
.right(left[35]), //i--
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|
.left(left[34]), //o--
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|
.q(q[34]) //o--
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);
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tri_fu_mul_bthmux u35(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
|
|
.x(x[34]), //i--
|
|
.right(left[36]), //i--
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|
.left(left[35]), //o--
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|
.q(q[35]) //o--
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);
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tri_fu_mul_bthmux u36(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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|
.sx2(s_x2), //i--
|
|
.x(x[35]), //i--
|
|
.right(left[37]), //i--
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|
.left(left[36]), //o--
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|
.q(q[36]) //o--
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);
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tri_fu_mul_bthmux u37(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
|
|
.x(x[36]), //i--
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|
.right(left[38]), //i--
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|
.left(left[37]), //o--
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|
.q(q[37]) //o--
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);
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tri_fu_mul_bthmux u38(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
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|
.x(x[37]), //i--
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|
.right(left[39]), //i--
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.left(left[38]), //o--
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.q(q[38]) //o--
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);
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tri_fu_mul_bthmux u39(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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|
.sx2(s_x2), //i--
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|
.x(x[38]), //i--
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|
.right(left[40]), //i--
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|
.left(left[39]), //o--
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|
.q(q[39]) //o--
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);
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tri_fu_mul_bthmux u40(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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.sx2(s_x2), //i--
|
|
.x(x[39]), //i--
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|
.right(left[41]), //i--
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|
.left(left[40]), //o--
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|
.q(q[40]) //o--
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);
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tri_fu_mul_bthmux u41(
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.sneg(s_neg), //i--
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.sx(s_x), //i--
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|
.sx2(s_x2), //i--
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|
.x(x[40]), //i--
|
|
.right(left[42]), //i--
|
|
.left(left[41]), //o--
|
|
.q(q[41]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u42(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[41]), //i--
|
|
.right(left[43]), //i--
|
|
.left(left[42]), //o--
|
|
.q(q[42]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u43(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[42]), //i--
|
|
.right(left[44]), //i--
|
|
.left(left[43]), //o--
|
|
.q(q[43]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u44(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[43]), //i--
|
|
.right(left[45]), //i--
|
|
.left(left[44]), //o--
|
|
.q(q[44]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u45(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[44]), //i--
|
|
.right(left[46]), //i--
|
|
.left(left[45]), //o--
|
|
.q(q[45]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u46(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[45]), //i--
|
|
.right(left[47]), //i--
|
|
.left(left[46]), //o--
|
|
.q(q[46]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u47(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[46]), //i--
|
|
.right(left[48]), //i--
|
|
.left(left[47]), //o--
|
|
.q(q[47]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u48(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[47]), //i--
|
|
.right(left[49]), //i--
|
|
.left(left[48]), //o--
|
|
.q(q[48]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u49(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[48]), //i--
|
|
.right(left[50]), //i--
|
|
.left(left[49]), //o--
|
|
.q(q[49]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u50(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[49]), //i--
|
|
.right(left[51]), //i--
|
|
.left(left[50]), //o--
|
|
.q(q[50]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u51(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[50]), //i--
|
|
.right(left[52]), //i--
|
|
.left(left[51]), //o--
|
|
.q(q[51]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u52(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[51]), //i--
|
|
.right(left[53]), //i--
|
|
.left(left[52]), //o--
|
|
.q(q[52]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u53(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[52]), //i--
|
|
.right(left[54]), //i--
|
|
.left(left[53]), //o--
|
|
.q(q[53]) //o--
|
|
);
|
|
|
|
|
|
tri_fu_mul_bthmux u54(
|
|
.sneg(s_neg), //i--
|
|
.sx(s_x), //i--
|
|
.sx2(s_x2), //i--
|
|
.x(x[53]), //i--
|
|
.right(s_neg), //i--
|
|
.left(left[54]), //o--
|
|
.q(q[54]) //o--
|
|
);
|
|
|
|
// For negate -A = !A + 1 ... this term is the plus 1.
|
|
// this has same bit weight as LSB, so it jumps down a row to free spot in compressor tree.
|
|
|
|
assign hot_one = (s_neg & (s_x | s_x2));
|
|
|
|
endmodule
|