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[/] [ft816float/] [trunk/] [rtl/] [verilog2/] [fp.sv] - Rev 69
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// ============================================================================
// __
// \\__/ o\ (C) 2020 Robert Finch, Waterloo
// \ __ / All rights reserved.
// \/_// robfinch<remove>@finitron.ca
// ||
//
// fp.sv
//
// This source file is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This source file is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// ============================================================================
//
package fp;
`ifndef FPWID
`define FPWID 64
`endif
`define QINFOS 23'h7FC000 // info
`define QSUBINF 4'd1
`define QINFDIV 4'd2
`define QZEROZERO 4'd3
`define QINFZERO 4'd4
`define QSQRTINF 4'd5
`define QSQRTNEG 4'd6
`define QSUBINFS 31'h7FC00001 // - infinity - infinity
`define QINFDIVS 31'h7FC00002 // - infinity / infinity
`define QZEROZEROS 31'h7FC00003 // - zero / zero
`define QINFZEROS 31'h7FC00004 // - infinity X zero
`define QSQRTINFS 31'h7FC00005 // - square root of infinity
`define QSQRTNEGS 31'h7FC00006 // - square root of negaitve number
`define QINFOD 52'hFF80000000000 // info
`define QSUBINFD 63'h7FF0000000000001 // - infinity - infinity
`define QINFDIVD 63'h7FF0000000000002 // - infinity / infinity
`define QZEROZEROD 63'h7FF0000000000003 // - zero / zero
`define QINFZEROD 63'h7FF0000000000004 // - infinity X zero
`define QSQRTINFD 63'h7FF0000000000005 // - square root of infinity
`define QSQRTNEGD 63'h7FF0000000000006 // - square root of negaitve number
`define QINFODX 64'hFF800000_00000000 // info
`define QSUBINFDX 79'h7FFF000000_0000000001 // - infinity - infinity
`define QINFDIVDX 79'h7FFF000000_0000000002 // - infinity / infinity
`define QZEROZERODX 79'h7FFF000000_0000000003 // - zero / zero
`define QINFZERODX 79'h7FFF000000_0000000004 // - infinity X zero
`define QSQRTINFDX 79'h7FFF000000_0000000005 // - square root of infinity
`define QSQRTNEGDX 79'h7FFF000000_0000000006 // - square root of negaitve number
`define QINFOQ 112'hFF800000_0000000000_0000000000 // info
`define QSUBINFQ 127'h7F_FF00000000_0000000000_0000000001 // - infinity - infinity
`define QINFDIVQ 127'h7F_FF00000000_0000000000_0000000002 // - infinity / infinity
`define QZEROZEROQ 127'h7F_FF00000000_0000000000_0000000003 // - zero / zero
`define QINFZEROQ 127'h7F_FF00000000_0000000000_0000000004 // - infinity X zero
`define QSQRTINFQ 127'h7F_FF00000000_0000000000_0000000005 // - square root of infinity
`define QSQRTNEGQ 127'h7F_FF00000000_0000000000_0000000006 // - square root of negaitve number
`define POINT5S 32'h3F000000
`define POINT5SX 40'h3F80000000
`define POINT5D 64'h3FE0000000000000
`define POINT5DX 80'h3FFE0000000000000000
`define ZEROS 32'h00000000
`define ZEROSX 40'h0000000000
`define ZEROD 64'h0000000000000000
`define ZERODX 80'h00000000000000000000
`define AIN 3'd0
`define BIN 3'd1
`define CIN 3'd2
`define RES 3'd3
`define POINT5 3'd4
`define ZERO 3'd5
`define SUPPORT_DENORMALS 1'b1
`define MIN_LATENCY 1'b1
parameter FPWID = `FPWID;
// This file contains defintions for fields to ease dealing with different fp
// widths. Some of the code still needs to be modified to support widths
// other than standard 32,64 or 80 bit.
localparam MSB = FPWID-1;
localparam EMSB = FPWID==128 ? 14 :
FPWID==96 ? 14 :
FPWID==80 ? 14 :
FPWID==64 ? 10 :
FPWID==52 ? 10 :
FPWID==48 ? 10 :
FPWID==44 ? 10 :
FPWID==42 ? 10 :
FPWID==40 ? 9 :
FPWID==32 ? 7 :
FPWID==24 ? 6 : 4;
localparam FMSB = FPWID==128 ? (111) :
FPWID==96 ? (79) :
FPWID==80 ? (63) :
FPWID==64 ? (51) :
FPWID==52 ? (39) :
FPWID==48 ? (35) :
FPWID==44 ? (31) :
FPWID==42 ? (29) :
FPWID==40 ? (28) :
FPWID==32 ? (22) :
FPWID==24 ? (15) : (9);
localparam FX = (FMSB+2)*2; // the MSB of the expanded fraction
localparam EX = FX + 1 + EMSB + 1 + 1 - 1;
endpackage
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