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 | .. _amdgpu_synid9_data_smem_atomic64: | 
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 | sdata | 
 | =========================== | 
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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:* 2 dwords. | 
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 | *Operands:* :ref:`s<amdgpu_synid_s>`, :ref:`flat_scratch<amdgpu_synid_flat_scratch>`, :ref:`xnack<amdgpu_synid_xnack>`, :ref:`vcc<amdgpu_synid_vcc>`, :ref:`ttmp<amdgpu_synid_ttmp>` |