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Fixed point arithmetic library

Project description

The fixedpoint package offers several features that are widely used in DSP applications:

  • Generate fixed point numbers from string literals, integers, or floating point numbers.
  • Specify bit widths and signedness, or allow it to be deduced
  • Various rounding methods
  • Various overflow handling methods
  • Configurable alerts for overflow, property mismatches, and implicit casting errors
  • Arithmetic operations such as addition, subtraction, multiplication, exponentiation
  • Bitwise operations AND, OR, XOR, and inversion.
  • Type casting to int, float, bool, str
  • Built-in string formatting (f-strings or str.format)
  • Comparisons with other FixedPoint, int, or float objects

The fixedpoint package is unit-tested against MATLAB stimulus (with the fixed point toolbox), making the fixedpoint package a viable, accurate, and cost-free alternative to MATLAB.

The fixedpoint package is released under the BSD license.

Copyright (c) 2019-2020, Schweitzer Engineering Laboratories, Inc. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
  3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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