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project_6/cccl_upstream/cub/test/catch2_test_printing.cu
EngineX CI 56fd68e7dd [INFRA] Import NVIDIA/CCCL upstream as optimization reference library
CCCL (CUDA C++ Core Libraries) provides:
- CUB: device/block/warp-level GPU primitives (reduce, scan, sort, topk)
- Thrust: high-level parallel algorithms (transform_reduce, sort, scan)
- libcudacxx: CUDA C++ standard library (atomics, barriers, memory)
- cudax: experimental features (memory resources, allocators)
- Tuning policies: per-SM hardware-specific algorithm parameters

Competition optimization vectors mapped to CCCL:
- Output TPS (83% weight): warp_reduce, block_reduce, device_topk
- Input TPS (14% weight): device_scan, block_load, prefetch
- Cache TPS (3% weight): prefix caching strategy patterns
- Memory (0.9 util): pooled/cached/buddy allocators

Source: https://github.com/NVIDIA/cccl (shallow clone, HEAD only)
License: Apache-2.0
2026-07-30 09:35:51 +00:00

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// SPDX-FileCopyrightText: Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
// SPDX-License-Identifier: BSD-3-Clause
#include <sstream>
#include "test_util.h"
#include <c2h/catch2_test_helper.h>
template <typename T>
std::string print(T val)
{
std::stringstream ss;
ss << val;
return ss.str();
}
#if TEST_INT128()
TEST_CASE("Test utils can print __int128", "[test][utils]")
{
REQUIRE(print(__int128_t{0}) == "0");
REQUIRE(print(__int128_t{42}) == "42");
REQUIRE(print(__int128_t{-1}) == "-1");
REQUIRE(print(__int128_t{-42}) == "-42");
REQUIRE(print(-1 * (__int128_t{1} << 120)) == "-1329227995784915872903807060280344576");
}
TEST_CASE("Test utils can print __uint128", "[test][utils]")
{
REQUIRE(print(__uint128_t{0}) == "0");
REQUIRE(print(__uint128_t{1}) == "1");
REQUIRE(print(__uint128_t{42}) == "42");
REQUIRE(print(__uint128_t{1} << 120) == "1329227995784915872903807060280344576");
}
#endif
TEST_CASE("Test utils can print KeyValuePair", "[test][utils]")
{
REQUIRE(print(cub::KeyValuePair<int, int>{42, -42}) == "(42,-42)");
}