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/*
* Copyright 2018 NVIDIA Corporation
*
* 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
#include <thrust/detail/cstdint.h>
#include <thrust/detail/preprocessor.h>
#include <thrust/detail/integer_traits.h>
/**
* Dispatch between 32-bit and 64-bit index based versions of the same algorithm
* implementation. This version assumes that callables for both branches consist
* of the same tokens, and is intended to be used with Thrust-style dispatch
* interfaces, that always deduce the size type from the arguments.
*/
#define THRUST_INDEX_TYPE_DISPATCH(status, call, count, arguments) \
if (count <= thrust::detail::integer_traits<thrust::detail::int32_t>::const_max) { \
auto THRUST_PP_CAT2(count, _fixed) = static_cast<thrust::detail::int32_t>(count); \
status = call arguments; \
} \
else { \
auto THRUST_PP_CAT2(count, _fixed) = static_cast<thrust::detail::int64_t>(count); \
status = call arguments; \
}
/**
* Dispatch between 32-bit and 64-bit index based versions of the same algorithm
* implementation. This version assumes that callables for both branches consist
* of the same tokens, and is intended to be used with Thrust-style dispatch
* interfaces, that always deduce the size type from the arguments.
*
* This version of the macro supports providing two count variables, which is
* necessary for set algorithms.
*/
#define THRUST_DOUBLE_INDEX_TYPE_DISPATCH(status, call, count1, count2, arguments) \
if (count1 + count2 <= thrust::detail::integer_traits<thrust::detail::int32_t>::const_max) { \
auto THRUST_PP_CAT2(count1, _fixed) = static_cast<thrust::detail::int32_t>(count1); \
auto THRUST_PP_CAT2(count2, _fixed) = static_cast<thrust::detail::int32_t>(count2); \
status = call arguments; \
} \
else { \
auto THRUST_PP_CAT2(count1, _fixed) = static_cast<thrust::detail::int64_t>(count1); \
auto THRUST_PP_CAT2(count2, _fixed) = static_cast<thrust::detail::int64_t>(count2); \
status = call arguments; \
}
/**
* Dispatch between 32-bit and 64-bit index based versions of the same algorithm
* implementation. This version allows using different token sequences for callables
* in both branches, and is intended to be used with CUB-style dispatch interfaces,
* where the "simple" interface always forces the size to be `int` (making it harder
* for us to use), but the complex interface that we end up using doesn't actually
* provide a way to fully deduce the type from just the call, making the size type
* appear in the token sequence of the callable.
*
* See reduce_n_impl to see an example of how this is meant to be used.
*/
#define THRUST_INDEX_TYPE_DISPATCH2(status, call_32, call_64, count, arguments) \
if (count <= thrust::detail::integer_traits<thrust::detail::int32_t>::const_max) { \
auto THRUST_PP_CAT2(count, _fixed) = static_cast<thrust::detail::int32_t>(count); \
status = call_32 arguments; \
} \
else { \
auto THRUST_PP_CAT2(count, _fixed) = static_cast<thrust::detail::int64_t>(count); \
status = call_64 arguments; \
}
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