FixedPointLibrary.bsv
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- //----------------------------------------------------------------------//
- // The MIT License
- //
- // Copyright (c) 2007 Alfred Man Cheuk Ng, mcn02@mit.edu
- //
- // 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.
- //----------------------------------------------------------------------//
- //////////////////////////////////////////////////////////
- // Some useful functions for FixedPoint Type
- // Author: Alfred Man C Ng
- // Email: mcn02@mit.edu
- // Data: 9-29-2006
- /////////////////////////////////////////////////////////
- import FixedPoint::*;
- // take the most significant n bits from the fixedpoint value, result represented in bits
- function Bit#(n) fxptGetMSBs(FixedPoint#(ai,af) x)
- provisos (Add#(n, xxA, TAdd#(ai,af)));
- return tpl_1(split(pack(x)));
- endfunction // Bit