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| .. _amdgpu_synid8_data_buf_atomic128: |
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| vdata |
| =========================== |
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| Input data for an atomic instruction. |
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| Optionally may serve as an output data: |
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| * If :ref:`glc<amdgpu_synid_glc>` is specified, gets the memory value before the operation. |
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| *Size:* 4 dwords by default. :ref:`tfe<amdgpu_synid_tfe>` adds 1 dword if specified. |
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| *Operands:* :ref:`v<amdgpu_synid_v>` |
