/*
 * SPDX-FileCopyrightText: Copyright (c) 1993-2026 NVIDIA CORPORATION &
 * AFFILIATES. All rights reserved. SPDX-License-Identifier: Apache-2.0
 *
 * Licensed 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.
 */
#pragma once

namespace gemm {

namespace trtllm {
namespace gen {

////////////////////////////////////////////////////////////////////////////////////////////////////

//
// TMA OOB optimization constants.
//
// CUDA Programming Guide states that "globalDim must be non-zero and less than
// or equal to 2^32". In practice, the kernel acts funny with TMA shape of 2^32
// so we use 2^31.
constexpr unsigned long TmaDimMax = 1UL << 31;
// Chosen so that LargeN * XLargeN * sizeof(dtype) >= 2^64 which causes overflow
// and effectively becomes 0. As sizeof(dtype) can be as small as 0.5B, we
// choose LargeN = 2^30 and XLargeN = 2^35 so overflow can happen.
constexpr unsigned long LargeN = 1UL << 30;
// Used in TMA stride. Should be less than 2^40.
constexpr unsigned long XLargeN = 1UL << 35;

////////////////////////////////////////////////////////////////////////////////////////////////////

template <typename T> inline T ceilDiv(T m, T n) { return (m + n - T(1)) / n; }

////////////////////////////////////////////////////////////////////////////////////////////////////

template <typename T> inline T roundUp(T m, T n) { return ceilDiv(m, n) * n; }

////////////////////////////////////////////////////////////////////////////////////////////////////

} // namespace gen
} // namespace trtllm

} // namespace gemm