---
id: pr-cccl-cub-8775
repo: NVIDIA/cccl
pr: 8775
title: '`cuda::std::simd` Optimize Arithmetic Floating-point Operations'
author: fbusato
date: '2026-05-06'
url: https://github.com/NVIDIA/cccl/pull/8775
source_category: upstream-code
architectures:
- sm100
tags:
- blackwell
- sm100
techniques: []
hardware_features:
- blackwell
kernel_types: []
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: 99426d2b13f48ace8b8e9682c7ca9f43e4cd1b76
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- libcudacxx/include/cuda/std/__fwd/simd.h
- libcudacxx/include/cuda/std/__internal/features.h
- libcudacxx/include/cuda/std/__simd/basic_vec.h
- libcudacxx/include/cuda/std/__simd/specializations/fixed_size_float_vec.h
- libcudacxx/include/cuda/std/__simd/specializations/fixed_size_mask.h
- libcudacxx/include/cuda/std/__simd/specializations/fixed_size_storage.h
- libcudacxx/include/cuda/std/__simd/specializations/fixed_size_vec.h
- libcudacxx/include/cuda/std/__simd/specializations/fp32x2_intrinsics.h
- libcudacxx/test/CMakeLists.txt
- libcudacxx/test/atomic_codegen/dump_and_check.bash
- libcudacxx/test/simd_codegen/CMakeLists.txt
- libcudacxx/test/simd_codegen/decrement_f32x2.cu
- libcudacxx/test/simd_codegen/fma_bf16.cu
- libcudacxx/test/simd_codegen/fma_f16.cu
- libcudacxx/test/simd_codegen/increment_f32x2.cu
- libcudacxx/test/simd_codegen/less_bf16.cu
- libcudacxx/test/simd_codegen/less_f16.cu
- libcudacxx/test/simd_codegen/minus_f32x2.cu
- libcudacxx/test/simd_codegen/multiplies_bf16.cu
- libcudacxx/test/simd_codegen/multiplies_f16.cu
- libcudacxx/test/simd_codegen/plus_bf16.cu
- libcudacxx/test/simd_codegen/plus_f16.cu
- libcudacxx/test/simd_codegen/plus_f32x2.cu
- libcudacxx/test/simd_codegen/unary_minus_f32x2.cu
artifact_dir: evidence/pull-bundles/cccl-cub/gh-8775
head_ref_oid: 29042f935c3733e4c5bd088e8e97f59c4515f406
---
# `cuda::std::simd` Optimize Arithmetic Floating-point Operations

- Repository: `NVIDIA/cccl`
- PR: [8775](https://github.com/NVIDIA/cccl/pull/8775)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `libcudacxx/include/cuda/std/__fwd/simd.h`
- `libcudacxx/include/cuda/std/__internal/features.h`
- `libcudacxx/include/cuda/std/__simd/basic_vec.h`
- `libcudacxx/include/cuda/std/__simd/specializations/fixed_size_float_vec.h`
- `libcudacxx/include/cuda/std/__simd/specializations/fixed_size_mask.h`
- `libcudacxx/include/cuda/std/__simd/specializations/fixed_size_storage.h`
- `libcudacxx/include/cuda/std/__simd/specializations/fixed_size_vec.h`
- `libcudacxx/include/cuda/std/__simd/specializations/fp32x2_intrinsics.h`
- `libcudacxx/test/CMakeLists.txt`
- `libcudacxx/test/atomic_codegen/dump_and_check.bash`
- `libcudacxx/test/simd_codegen/CMakeLists.txt`
- `libcudacxx/test/simd_codegen/decrement_f32x2.cu`
- `libcudacxx/test/simd_codegen/fma_bf16.cu`
- `libcudacxx/test/simd_codegen/fma_f16.cu`
- `libcudacxx/test/simd_codegen/increment_f32x2.cu`
- `libcudacxx/test/simd_codegen/less_bf16.cu`
- `libcudacxx/test/simd_codegen/less_f16.cu`
- `libcudacxx/test/simd_codegen/minus_f32x2.cu`
- `libcudacxx/test/simd_codegen/multiplies_bf16.cu`
- `libcudacxx/test/simd_codegen/multiplies_f16.cu`
- `libcudacxx/test/simd_codegen/plus_bf16.cu`
- `libcudacxx/test/simd_codegen/plus_f16.cu`
- `libcudacxx/test/simd_codegen/plus_f32x2.cu`
- `libcudacxx/test/simd_codegen/unary_minus_f32x2.cu`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-8775`
