`include "Raptor64_opcodes.v"
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`include "Raptor64_opcodes.v"
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`timescale 1ns / 1ps
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`timescale 1ns / 1ps
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//=============================================================================
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//=============================================================================
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// __
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// __
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// \\__/ o\ (C) 2012 Robert Finch
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// \\__/ o\ (C) 2012 Robert Finch
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// \ __ / All rights reserved.
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// \ __ / All rights reserved.
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// \/_// robfinch<remove>@opencores.org
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// \/_// robfinch<remove>@opencores.org
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// ||
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// ||
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//
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//
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// Raptor64_bitfield.v
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// Raptor64_bitfield.v
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// - bitfield datapath operations
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// - bitfield datapath operations
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//
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//
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//
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//
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// This source file is free software: you can redistribute it and/or modify
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// This source file is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published
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// it under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or
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// by the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// (at your option) any later version.
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//
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//
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// This source file is distributed in the hope that it will be useful,
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// This source file is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// GNU General Public License for more details.
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//
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//
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// You should have received a copy of the GNU General Public License
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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//
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//
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//
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//=============================================================================
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//=============================================================================
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//
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//
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module Raptor64_bitfield(xIR, rolo, b, o, masko);
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module Raptor64_bitfield(xIR, rolo, b, o, masko);
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input [41:0] xIR;
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input [31:0] xIR;
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input [63:0] rolo;
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input [63:0] rolo;
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input [63:0] b;
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input [63:0] b;
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output [63:0] o;
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output [63:0] o;
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reg [63:0] o;
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reg [63:0] o;
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output [63:0] masko;
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output [63:0] masko;
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reg [63:0] o1;
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reg [63:0] o1;
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wire [6:0] xOpcode = xIR[41:35];
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wire [6:0] xOpcode = xIR[31:25];
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wire [4:0] xFunc5 = xIR[4:0];
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wire [4:0] xFunc5 = xIR[4:0];
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// generate mask
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// generate mask
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reg [63:0] mask;
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reg [63:0] mask;
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assign masko = mask;
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assign masko = mask;
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wire [5:0] mb = xIR[12:7];
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wire [5:0] mb = xIR[10:5];
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wire [5:0] me = xIR[18:13];
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wire [5:0] me = xIR[16:11];
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integer nn,n;
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integer nn,n;
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always @(mb or me or nn)
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always @(mb or me or nn)
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for (nn = 0; nn < 64; nn = nn + 1)
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for (nn = 0; nn < 64; nn = nn + 1)
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mask[nn] <= (nn >= mb) ^ (nn <= me) ^ (me >= mb);
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mask[nn] <= (nn >= mb) ^ (nn <= me) ^ (me >= mb);
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always @(xOpcode,xFunc5,mask,b,rolo,mb)
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always @(xOpcode,xFunc5,mask,b,rolo,mb)
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case (xOpcode)
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case (xOpcode)
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`SHFTI:
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`SHFTI:
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case(xFunc5)
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case(xFunc5)
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`BFINS: begin for (n = 0; n < 64; n = n + 1) o[n] = mask[n] ? rolo[n] : b[n]; end
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`BFINS: begin for (n = 0; n < 64; n = n + 1) o[n] = mask[n] ? rolo[n] : b[n]; end
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`BFSET: begin for (n = 0; n < 64; n = n + 1) o[n] = mask[n] ? 1'b1 : b[n]; end
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`BFSET: begin for (n = 0; n < 64; n = n + 1) o[n] = mask[n] ? 1'b1 : b[n]; end
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`BFCLR: begin for (n = 0; n < 64; n = n + 1) o[n] = mask[n] ? 1'b0 : b[n]; end
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`BFCLR: begin for (n = 0; n < 64; n = n + 1) o[n] = mask[n] ? 1'b0 : b[n]; end
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`BFCHG: begin for (n = 0; n < 64; n = n + 1) o[n] = mask[n] ? ~b[n] : b[n]; end
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`BFCHG: begin for (n = 0; n < 64; n = n + 1) o[n] = mask[n] ? ~b[n] : b[n]; end
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`BFEXT: begin
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`BFEXT: begin
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for (n = 0; n < 64; n = n + 1)
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for (n = 0; n < 64; n = n + 1)
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o1[n] = mask[n] ? b[n] : 1'b0;
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o1[n] = mask[n] ? b[n] : 1'b0;
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o = o1 >> mb;
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o = o1 >> mb;
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end
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end
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default: o = 64'd0;
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default: o = 64'd0;
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endcase
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endcase
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default: o = 64'd0;
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default: o = 64'd0;
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endcase
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endcase
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endmodule
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endmodule
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