opencv

Open Source Computer Vision Library https://opencv.org/

HAN Liutong 1d9ca7160b Merge pull request #25796 from hanliutong:hfloat Use hfloat instead of __fp16. #25796 Related: #25743 Currently, the type for the half-precision floating point data in the OpenCV source code is `__fp16`, which is a unique(?) type supported by the ARM compiler. Other compilers have very limited support for `__fp16`, so in order to introduce more backends that support FP16 (such as RISC-V), we may need a the more general FP16 type. In this patch, we use `hfloat` instead of `__fp16` in non-ARM code blocks, mainly affected parts are: - `core/hal/intrin.hpp`: Type Traits, REG Traits and `vx_` interface. - `core/hal/intrin_neon.hpp`: Universal Intrinsic API for FP16 type. - `core/test/test_intrin_utils.hpp`: Usage of Univseral Intrinsic - `core/include/opencv2/core/cvdef.h`: Definition of class `hfloat` If I understand correctly, class `hfloat` acts as a wrapper around FP16 types in different platform (`__fp16` for ARM and `_Float16` for RISC-V). Any OpenCV generic interface/source code should use `hfloat`, while platform-specific FP16 types only used in macro-guarded code blocks. /cc @fengyuentau @mshabunin ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [ ] I agree to contribute to the project under Apache 2 License. - [ ] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [ ] The PR is proposed to the proper branch - [ ] There is a reference to the original bug report and related work - [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ ] The feature is well documented and sample code can be built with the project CMake		10 months ago
.github	Added Ubuntu 24.04 pipeline for 5.x	11 months ago
3rdparty	Warnings fix for Ubuntu 24.04.	11 months ago
apps	Merge branch '4.x' into '5.x'	11 months ago
cmake	Merge branch 4.x	11 months ago
doc	Merge pull request #25410 from kaingwade:add_videocapture_depth_sample	10 months ago
include	…
modules	Merge pull request #25796 from hanliutong:hfloat	10 months ago
platforms	Merge branch 4.x	11 months ago
samples	Merge pull request #25410 from kaingwade:add_videocapture_depth_sample	10 months ago
.editorconfig	…
.gitattributes	…
.gitignore	…
CMakeLists.txt	Merge branch 4.x	11 months ago
CONTRIBUTING.md	…
COPYRIGHT	…
LICENSE	…
README.md	…
SECURITY.md	…

README.md

OpenCV: Open Source Computer Vision Library

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