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.. _amdgpu_synid8_data_buf_atomic128:

vdata
===========================

Input data for an atomic instruction.

Optionally may serve as an output data:

* If :ref:`glc<amdgpu_synid_glc>` is specified, gets the memory value before the operation.

*Size:* 4 dwords by default. :ref:`tfe<amdgpu_synid_tfe>` adds 1 dword if specified.

*Operands:* :ref:`v<amdgpu_synid_v>`