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[/] [bluespec-reedsolomon/] [trunk/] [bsv-reedsolomon/] [GFTypes.bsv] - Rev 8
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//----------------------------------------------------------------------//
// The MIT License
//
// Copyright (c) 2008 Abhinav Agarwal, Alfred Man Cheuk Ng
// Contact: abhiag@gmail.com
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//----------------------------------------------------------------------//
//*************************************************************
// Type definitions for use in the Reed-Solomon modules
//-------------------------------------------------------------
import Vector::*;
typedef Bit#(8) Byte;
typedef Byte Polynomial;
typedef Vector#(n,Byte) Syndrome#(numeric type n);
typedef enum
{ NO_ERROR,
CORRECTABLE,
INCORRECTABLE
} ErrInfo deriving (Bits, Eq);
`include "RSParameters.bsv"
typedef TMul#(T,2) TwoT; // 2 * T
typedef TAdd#(T,2) TPlusTwo; // T + 2
typedef TDiv#(T,2) HalfT; // T/2
// -----------------------------------------------------------
// The primitive polynomial defines the Galois field in which
// Reed-Solomon decoder operates, and all the following
// arithmetic operations are defined under. Changing this
// value cause the whole Reed-Solomon decoder to operate
// under the new primitive polynomial.
// primitive_polynomial[i] = Coefficient of x**i for i = 0:7
// -----------------------------------------------------------
Byte n_param = 8'd255;
Byte t_param = fromInteger(valueOf(T));