Use natively hip_bfloat16 as a member of BFloat16 class to take advan…

[anatoliylitv]

…tage of possible optimizations from compiler.

Motivation

Technical Details

Test Plan

Test Result

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[rocm-repo-management-api]

Jenkins build for 70a53bc338d1a17b2c9d0e10199ed78c78bc963b commit finished as FAILURE
Links: Pipeline Overview / Build artifacts / Test Results

Detected error during Pytorch building:

[4988/8156] Building CXX object third_party/onnx/CMakeFiles/onnx.dir/onnx/defs/logical/defs.cc.o
[4989/8156] Building CXX object third_party/onnx/CMakeFiles/onnx.dir/onnx/defs/shape_inference.cc.o
[4990/8156] Building CXX object third_party/onnx/CMakeFiles/onnx.dir/onnx/defs/quantization/old.cc.o
[4991/8156] Building CXX object third_party/onnx/CMakeFiles/onnx.dir/onnx/defs/controlflow/old.cc.o
[4992/8156] Building HIPCC object third_party/gloo/gloo/CMakeFiles/gloo_hip.dir/__/__/__/build/third_party/gloo/hip/gloo/gloo_hip_generated_hip_private.hip.o
FAILED: third_party/gloo/gloo/CMakeFiles/gloo_hip.dir/__/__/__/build/third_party/gloo/hip/gloo/gloo_hip_generated_hip_private.hip.o /var/lib/jenkins/pytorch/build/third_party/gloo/gloo/CMakeFiles/gloo_hip.dir/__/__/__/build/third_party/gloo/hip/gloo/gloo_hip_generated_hip_private.hip.o 
cd /var/lib/jenkins/pytorch/build/third_party/gloo/gloo/CMakeFiles/gloo_hip.dir/__/__/__/build/third_party/gloo/hip/gloo && /opt/conda/envs/py_3.12/lib/python3.12/site-packages/cmake/data/bin/cmake -E make_directory /var/lib/jenkins/pytorch/build/third_party/gloo/gloo/CMakeFiles/gloo_hip.dir/__/__/__/build/third_party/gloo/hip/gloo/. && /opt/conda/envs/py_3.12/lib/python3.12/site-packages/cmake/data/bin/cmake -D verbose:BOOL=OFF -D build_configuration:STRING=RELEASE -D generated_file:STRING=/var/lib/jenkins/pytorch/build/third_party/gloo/gloo/CMakeFiles/gloo_hip.dir/__/__/__/build/third_party/gloo/hip/gloo/./gloo_hip_generated_hip_private.hip.o -P /var/lib/jenkins/pytorch/build/third_party/gloo/gloo/CMakeFiles/gloo_hip.dir/__/__/__/build/third_party/gloo/hip/gloo/gloo_hip_generated_hip_private.hip.o.cmake
In file included from /var/lib/jenkins/pytorch/build/third_party/gloo/hip/gloo/hip_private.hip:9:
In file included from /var/lib/jenkins/pytorch/build/third_party/gloo/hip/gloo/hip_private.h:24:
In file included from /var/lib/jenkins/pytorch/c10/util/BFloat16.h:1:
/var/lib/jenkins/pytorch/torch/headeronly/util/BFloat16.h:34:44: error: '__x' is a protected member of '__hip_bfloat16'