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* Add fp8_primary_weights support for blockwise scaling
Signed-off-by: kunlunl <kunlunl@nvidia.com>

custom fsdp
Signed-off-by: kunlunl <kunlunl@nvidia.com>

[pre-commit.ci] auto fixes from pre-commit.com hooks

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Add view to blockwise fp8 tensor
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* Fix columnwise_shape in backward of view()
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* Add comments to the unit of start_offset
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* Add test for view and reshape for blockwise fp8 tensor
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* Add implementation for self._columnwise_scale_inv is not existed
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Track down checks for _columnwise_data is None and adding checks for  _columnwise_invalid
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Add assertion to check whether ._quantizer is None
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* rename partial_cast.cu -> fp8_block_scaling_partial_cast.cu
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* rename partial_cast kernel to fp8_block_scaling_partial_cast kernel
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Add shfl_sync in partial cast kernel
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* Remove columnwise_invalid flag
Signed-off-by: kunlunl <kunlunl@nvidia.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Add comments about out-of-bounds write
Signed-off-by: kunlunl <kunlunl@nvidia.com>

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Signed-off-by: kunlunl <kunlunl@nvidia.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>