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76 lines
2.9 KiB
Python
76 lines
2.9 KiB
Python
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#! /usr/bin/env python
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#
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# Copyright (C) 2014 Intel Corporation
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice (including the next
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# paragraph) shall be included in all copies or substantial portions of the
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# Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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#
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# Authors:
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# Jason Ekstrand (jason@jlekstrand.net)
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import nir_algebraic
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# Convenience variables
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a = 'a'
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b = 'b'
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c = 'c'
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d = 'd'
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# Written in the form (<search>, <replace>) where <search> is an expression
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# and <replace> is either an expression or a value. An expression is
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# defined as a tuple of the form (<op>, <src0>, <src1>, <src2>, <src3>)
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# where each source is either an expression or a value. A value can be
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# either a numeric constant or a string representing a variable name. For
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# constants, you have to be careful to make sure that it is the right type
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# because python is unaware of the source and destination types of the
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# opcodes.
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optimizations = [
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(('fneg', ('fneg', a)), a),
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(('ineg', ('ineg', a)), a),
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(('fabs', ('fabs', a)), ('fabs', a)),
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(('fabs', ('fneg', a)), ('fabs', a)),
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(('iabs', ('iabs', a)), ('iabs', a)),
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(('iabs', ('ineg', a)), ('iabs', a)),
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(('fadd', a, 0.0), a),
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(('iadd', a, 0), a),
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(('fmul', a, 0.0), 0.0),
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(('imul', a, 0), 0),
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(('fmul', a, 1.0), a),
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(('imul', a, 1), a),
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(('fmul', a, -1.0), ('fneg', a)),
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(('imul', a, -1), ('ineg', a)),
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(('ffma', 0.0, a, b), b),
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(('ffma', a, 0.0, b), b),
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(('ffma', a, b, 0.0), ('fmul', a, b)),
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(('ffma', a, 1.0, b), ('fadd', a, b)),
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(('ffma', 1.0, a, b), ('fadd', a, b)),
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(('flrp', a, b, 0.0), a),
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(('flrp', a, b, 1.0), b),
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(('flrp', a, a, b), a),
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(('flrp', 0.0, a, b), ('fmul', a, b)),
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(('fadd', ('fmul', a, b), c), ('ffma', a, b, c)),
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(('fge', ('fneg', ('fabs', a)), 0.0), ('feq', a, 0.0)),
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(('fmin', ('fmax', a, 1.0), 0.0), ('fsat', a)),
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# This one may not be exact
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(('feq', ('fadd', a, b), 0.0), ('feq', a, ('fneg', b))),
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]
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print nir_algebraic.AlgebraicPass("nir_opt_algebraic", optimizations).render()
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