llvm/llvm/docs/AMDGPU/gfx9_vsrc_ba3116.rst

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.. _amdgpu_synid_gfx9_vsrc_ba3116:

vsrc
====

Data to copy to export buffers. This is an optional operand. Must be specified as :ref:`off<amdgpu_synid_off>` if not used.

The :ref:`compr<amdgpu_synid_compr>` modifier indicates the use of compressed (16-bit) data, thus decreasing the number of source operands from 4 to 2:

* src0 and src1 must specify the first register (or :ref:`off<amdgpu_synid_off>`).
* src2 and src3 must specify the second register (or :ref:`off<amdgpu_synid_off>`).

An example:

.. parsed-literal::

  exp mrtz v3, v3, off, off compr

*Size:* 1 dword.

*Operands:* :ref:`v<amdgpu_synid_v>`, :ref:`off<amdgpu_synid_off>`