2a7ca101d7
Sparse-checkout from NVIDIA/cccl main branch to complete cccl_upstream: Added: - python/cuda_cccl/ (226 files) — Python bindings for device-level algorithms Critical for muh toolchain: cuda.compute.reduce_into, scan, radix_sort, etc. Includes 204 .py files with full test coverage for all 27 algorithms - ci/ (163 files) — Build/test infrastructure build_cub.sh, test_cub.sh, build_and_test_targets.sh, matrix.yaml Directly maps to our [INFRA-CI] and [INFRA-BUILD] items - .agent/skills/ (7 files) — NVIDIA's own agent skills for CCCL cccl-style/SKILL.md, cccl-test/SKILL.md, sass-diff/SKILL.md - docs/ (491 files) — Official CCCL documentation CI references, CMake guides, Python compute docs, libcudacxx PTX docs - test/ (12 files) — Top-level integration tests (cuda_smoke, stdpar) - Root configs: .clang-format, .clang-tidy, CONTRIBUTING.md, pyproject.toml - CLAUDE.md symlink → AGENTS.md (NVIDIA's standard) cccl_upstream now mirrors full NVIDIA/cccl structure: Before: 42M (cub + thrust + libcudacxx + cudax + c + examples + benchmarks) After: 53M (+python +ci +docs +.agent +test +configs) This completes the CCCL base needed for: - [muh-bench] items: ci/util/build_and_test_targets.sh for targeted builds - [CCCL-verify] items: python/cuda_cccl/tests/ as reference implementations - [CCCL-test] items: ci/test_cub.sh, ci/test_thrust.sh - Agent workflow: .agent/skills/ for consistent style and test patterns
58 lines
1.3 KiB
ReStructuredText
58 lines
1.3 KiB
ReStructuredText
.. _libcudacxx-extended-api-math-neg:
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``cuda::neg``
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====================================
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Defined in the ``<cuda/cmath>`` header.
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.. code:: cuda
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namespace cuda {
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template <typename T>
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[[nodiscard]] __host__ __device__ constexpr
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T neg(T value) noexcept;
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} // namespace cuda
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The function computes the negation of the input value accepting both signed and unsigned integer types. It doesn't emit any warnings for signed integer overflow and applying ``-`` to unsigned integer types.
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**Parameters**
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- ``value``: The input value.
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**Return value**
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- The negated value of the input value.
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**Constraints**
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- ``T`` is an integer type.
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Example
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-------
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.. code:: cuda
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#include <cuda/cmath>
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#include <cuda/std/cassert>
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#include <cuda/std/limits>
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__global__ void neg_kernel() {
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using cuda::std::numeric_limits;
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assert(cuda::neg(1) == -1);
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assert(cuda::neg(20) == -20);
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assert(cuda::neg(127u) == 4294967169u);
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assert(cuda::neg(-127) == 127);
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assert(cuda::neg(cuda::std::numeric_limits<int>::min()) == cuda::std::numeric_limits<int>::min());
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}
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int main() {
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neg_kernel<<<1, 1>>>();
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cudaDeviceSynchronize();
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return 0;
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}
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`See it on Godbolt 🔗 <https://godbolt.org/z/K3zcE9zqn>`__
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