wehub-resource-sync
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/*!
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* \file tvm/arith/pattern.h
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* \brief Expression pattern detectors.
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*/
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#ifndef TVM_ARITH_PATTERN_H_
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#define TVM_ARITH_PATTERN_H_
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#include <tvm/ir/expr.h>
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#include <tvm/tirx/expr.h>
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namespace tvm {
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namespace arith {
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/*!
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* \brief Detect if e can be rewritten as e = sum_{i=0}^{n-1} var[i] * coeff[i] + coeff[n]
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* Where coeff[i] and base are invariant of var[j] for all i and j.
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*
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* \param e The expression to be detected.
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* \param vars List of variables to be used in detection.
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* \return [coeff[i]] if it is possible, empty array if it is not.
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*/
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ffi::Array<PrimExpr> DetectLinearEquation(const PrimExpr& e, const ffi::Array<tirx::Var>& vars);
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/*!
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* \brief Detect if expression corresponds to clip bound of the vars
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*
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* \param e The expression to be detected.
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* \param vars List of variables to be used in detection.
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* \return concat([min_value[i], max_value[i]]), None is returned if there is no min or max value
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* return empty if the e does not match the pattern.
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*/
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ffi::Array<PrimExpr> DetectClipBound(const PrimExpr& e, const ffi::Array<tirx::Var>& vars);
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} // namespace arith
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} // namespace tvm
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#endif // TVM_ARITH_PATTERN_H_
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