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58 lines
1.5 KiB
58 lines
1.5 KiB
/* |
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* Copyright 2008-2012 NVIDIA Corporation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* 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, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#pragma once |
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//functions to support blocking |
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namespace thrust |
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{ |
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namespace detail |
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{ |
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namespace util |
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{ |
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// x/y rounding towards +infinity for integers, used to determine # of blocks/warps etc. |
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template<typename L, typename R> |
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inline __host__ __device__ L divide_ri(const L x, const R y) |
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{ |
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return (x + (y - 1)) / y; |
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} |
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// x/y rounding towards zero for integers, used to determine # of blocks/warps etc. |
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template<typename L, typename R> |
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inline __host__ __device__ L divide_rz(const L x, const R y) |
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{ |
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return x / y; |
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} |
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// round x towards infinity to the next multiple of y |
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template<typename L, typename R> |
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inline __host__ __device__ L round_i(const L x, const R y){ return y * divide_ri(x, y); } |
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// round x towards zero to the next multiple of y |
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template<typename L, typename R> |
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inline __host__ __device__ L round_z(const L x, const R y){ return y * divide_rz(x, y); } |
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} // end namespace util |
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} // end namespace detail |
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} // end namespace thrust |
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