broadcast.h

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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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#ifndef TVM_TOPI_BROADCAST_H_
#define TVM_TOPI_BROADCAST_H_
 
#include <tvm/topi/detail/broadcast.h>
#include <tvm/topi/detail/constant_utils.h>
#include <tvm/topi/tags.h>
 
#include <algorithm>
#include <string>
 
namespace tvm {
namespace topi {
 
inline tvm::te::Tensor broadcast_to(const tvm::te::Tensor& t,
                                    const tvm::Array<tvm::PrimExpr>& output_shape,
                                    std::string name = "T_broadcast_to",
                                    std::string tag = kBroadcast) {
  ICHECK_GE(output_shape.size(), t->shape.size())
      << "Not a broadcast, output dimensionality smaller than input.\noutput: " << output_shape
      << "\nvs\ninput: " << t;
  auto bh = detail::BroadcastShape(output_shape, t->shape);
  ICHECK_EQ(output_shape.size(), bh.common_shape.size());
  Array<PrimExpr> oshape;
  for (size_t i = 0; i < output_shape.size(); ++i) {
    if (output_shape[i].as<tir::IntImmNode>() == nullptr) {
      oshape.push_back(output_shape[i]);
    } else {
      ICHECK(topi::detail::EqualCheck(output_shape[i], bh.common_shape[i]));
      oshape.push_back(bh.common_shape[i]);
    }
  }
  auto l = [&](tvm::Array<tvm::tir::Var> ovars) {
    return t(detail::InputIndexFromBroadcast(ovars, t, bh.vars2, bh.all_vars));
  };
  return tvm::te::compute(oshape, l, name, tag);
}
 
#define TOPI_DEFINE_BCAST_OP(Name, ComputeRule)                                                   \
  inline tvm::PrimExpr Name(const tvm::PrimExpr& a, const tvm::PrimExpr& b) { ComputeRule; }      \
  inline tvm::te::Tensor Name(const tvm::te::Tensor& A, const tvm::te::Tensor& B,                 \
                              std::string name = "T_" #Name, std::string tag = kBroadcast) {      \
    auto l = [](tvm::PrimExpr a, tvm::PrimExpr b) { ComputeRule; };                               \
    return detail::WithBroadcast(l, A, B, name, tag);                                             \
  }                                                                                               \
  inline tvm::te::Tensor Name(const tvm::te::Tensor& A, const tvm::PrimExpr& B,                   \
                              std::string name = "T_" #Name, std::string tag = kElementWise) {    \
    auto l = [](tvm::PrimExpr a, tvm::PrimExpr b) { ComputeRule; };                               \
    return tvm::te::compute(                                                                      \
        A->shape, [&](const ::tvm::Array<::tvm::tir::Var>& i) { return l(A(i), B); }, name, tag); \
  }                                                                                               \
  inline tvm::te::Tensor Name(const tvm::PrimExpr& A, const tvm::te::Tensor& B,                   \
                              std::string name = "T_" #Name, std::string tag = kElementWise) {    \
    auto l = [&](tvm::PrimExpr a, tvm::PrimExpr b) { ComputeRule; };                              \
    return tvm::te::compute(                                                                      \
        B->shape, [&](const ::tvm::Array<::tvm::tir::Var>& i) { return l(A, B(i)); }, name, tag); \
  }
 
#define TOPI_DEFINE_OP_OVERLOAD(Name, OpName)                                       \
  inline tvm::te::Tensor Name(const tvm::te::Tensor& A, const tvm::te::Tensor& B) { \
    return topi::OpName(A, B);                                                      \
  }                                                                                 \
  inline tvm::te::Tensor Name(const tvm::PrimExpr& A, const tvm::te::Tensor& B) {   \
    return topi::OpName(A, B);                                                      \
  }                                                                                 \
  inline tvm::te::Tensor Name(const tvm::te::Tensor& A, const tvm::PrimExpr& B) {   \
    return topi::OpName(A, B);                                                      \
  }
 
TOPI_DEFINE_BCAST_OP(logical_and, { return a && b; });
TOPI_DEFINE_OP_OVERLOAD(operator&&, logical_and);
 
TOPI_DEFINE_BCAST_OP(logical_or, { return a || b; });
TOPI_DEFINE_OP_OVERLOAD(operator||, logical_or);
 
TOPI_DEFINE_BCAST_OP(logical_xor, { return a ^ b; });
 
TOPI_DEFINE_BCAST_OP(bitwise_and, { return a & b; });
TOPI_DEFINE_OP_OVERLOAD(operator&, bitwise_and);
 
TOPI_DEFINE_BCAST_OP(bitwise_or, { return a | b; });
TOPI_DEFINE_OP_OVERLOAD(operator|, bitwise_or);
 
TOPI_DEFINE_BCAST_OP(bitwise_xor, { return a ^ b; });
TOPI_DEFINE_OP_OVERLOAD(operator^, bitwise_xor);
 
TOPI_DEFINE_BCAST_OP(add, { return a + b; });
TOPI_DEFINE_OP_OVERLOAD(operator+, add);
 
TOPI_DEFINE_BCAST_OP(subtract, { return a - b; });
TOPI_DEFINE_OP_OVERLOAD(operator-, subtract);
 
TOPI_DEFINE_BCAST_OP(multiply, { return a * b; });
TOPI_DEFINE_OP_OVERLOAD(operator*, multiply);
 
TOPI_DEFINE_BCAST_OP(divide, { return div(a, b); });
 
TOPI_DEFINE_BCAST_OP(floor_divide, {
  if (a.dtype().is_int() || a.dtype().is_uint()) {
    return floordiv(a, b);
  } else {
    return floor(div(a, b));
  }
});
 
TOPI_DEFINE_BCAST_OP(trunc_divide, {
  if (a.dtype().is_int() || a.dtype().is_uint()) {
    return truncdiv(a, b);
  } else {
    return trunc(div(a, b));
  }
});
 
TOPI_DEFINE_BCAST_OP(mod, { return truncmod(a, b); });
 
TOPI_DEFINE_BCAST_OP(floor_mod, {
  if (a.dtype().is_int() || a.dtype().is_uint()) {
    return floormod(a, b);
  } else {
    return a - floor_divide(a, b) * b;
  }
});
 
TOPI_DEFINE_BCAST_OP(trunc_mod, {
  if (a.dtype().is_int() || a.dtype().is_uint()) {
    return truncmod(a, b);
  } else {
    return a - trunc_divide(a, b) * b;
  }
});
 
TOPI_DEFINE_BCAST_OP(maximum, { return tvm::max(a, b); });
 
TOPI_DEFINE_BCAST_OP(minimum, { return tvm::min(a, b); });
 
TOPI_DEFINE_BCAST_OP(power, { return tvm::pow(a, b); });
 
TOPI_DEFINE_BCAST_OP(left_shift, { return a << b; });
TOPI_DEFINE_OP_OVERLOAD(operator<<, left_shift);
 
TOPI_DEFINE_BCAST_OP(right_shift, { return a >> b; });
TOPI_DEFINE_OP_OVERLOAD(operator>>, right_shift);
 
TOPI_DEFINE_BCAST_OP(greater, { return (a > b); });
 
TOPI_DEFINE_BCAST_OP(less, { return (a < b); });
 
TOPI_DEFINE_BCAST_OP(equal, { return (a == b); });
 
TOPI_DEFINE_BCAST_OP(not_equal, { return (a != b); });
 
TOPI_DEFINE_BCAST_OP(greater_equal, { return (a >= b); });
 
TOPI_DEFINE_BCAST_OP(less_equal, { return (a <= b); });
 
}  // namespace topi
}  // namespace tvm
 
#endif  // TVM_TOPI_BROADCAST_H_