llvm-project/llvm/docs/AMDGPU/gfx9_vdata_aa5a53.rst
Dmitry Preobrazhensky d8ac03f15e [AMDGPU][GFX9][DOC][NFC] Update assembler syntax description
Summary of changes:
- Enable register tuples with 9, 10, 11 and 12 registers (https://reviews.llvm.org/D138205).
- Enable omod modifiers for v_max3_f16, v_min3_f16, etc. (https://reviews.llvm.org/D139469).
- Enable abs and neg modifiers for v_cndmask_b32 (https://reviews.llvm.org/D135900).
- Correct v_mov_b32_sdwa (it does not support abs and neg input modifiers yet).
- Enable tfe modifier for MUBUF loads (https://reviews.llvm.org/D137783).
- Enable image_gather4h (https://reviews.llvm.org/D130764).
- Minor corrections and improvements.
2022-12-13 14:01:17 +03:00

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.. _amdgpu_synid_gfx9_vdata_aa5a53:
vdata
=====
Input data for an atomic instruction.
Optionally, this operand may be used to store output data:
* If :ref:`glc<amdgpu_synid_glc>` is specified, gets the memory value before the operation.
*Size:* depends on :ref:`dmask<amdgpu_synid_dmask>`:
* :ref:`dmask<amdgpu_synid_dmask>` may specify 1 data element for 32-bit-per-pixel surfaces or 2 data elements for 64-bit-per-pixel surfaces. Each data element occupies 1 dword.
Note: the surface data format is indicated in the image resource constant, but not in the instruction.
*Operands:* :ref:`v<amdgpu_synid_v>`