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59 lines
1.5 KiB
59 lines
1.5 KiB
11 years ago
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/*
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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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