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<!---======================= begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ==========================-->
## Opcode
VME_IME = 0x54
## Format
| | | | | | | |
| --- | --- | --- | --- | --- | --- | --- |
| 0x54(VME_IME) | StreamMode | SearchCtrl | UNIInput | IMEInput | Surface | Ref0 |
| | Ref1 | CostCenter | Output | | | |
## Semantics
Video Motion Estimation - integer motion estimation
## Description
Performs Integer Motion Estimation. See [4] for more detailed information on the VME functionality. This instruction may not appear inside a SIMD control flow block.
- **StreamMode(ub):** VME stream mode. Valid values are:
- 0: VME_STREAM_DISABLE
- 1: VME_STREAM_OUT
- 2: VME_STREAM_IN
- 3: VME_STREAM_IN_OUT
- **SearchCtrl(ub):** VME search control state. Valid values are:
- 0: VME_SEARCH_SINGLE_REF_SINGLE_REC_SINGLE_START
- 1: VME_SEARCH_SINGLE_REF_SINGLE_REC_DUAL_START
- 2: VME_SEARCH_SINGLE_REF_DUAL_REC
- 3: VME_SEARCH_DUAL_REF_DUAL_REC
- **UNIInput(raw_operand):** The raw operand of a general variable that stores the universal VME payload data. Must have type UB. Must have 128 elements
- **IMEInput(raw_operand):** The raw operand of a general variable that stores the IME payload data. Must have type UB. Number of elements is:
- 128 (field_value(StreamMode)!=0) and (field_value(SearchCtrl)!=3)
- 64 field_value(StreamMode)==0
- 192 (field_value(StreamMode)!=0) and (field_value(SearchCtrl)==3)
- **Surface(ub):** The index of the surface variable
- **Ref0(raw_operand):** The raw operand of a general variable containing the position of the left-top integer corner of the first reference window located in the first reference surface (in unit of pixels, relative to the surface origin). Must have type UW. Must have 2 elements
- **Ref1(raw_operand):** The raw operand of a general variable containing the position of the left-top integer corner of the second reference window located in the second reference surface (in unit of pixels, relative to the surface origin; ignored in single reference mode). Must have type UW. Must have 2 elements
- **CostCenter(raw_operand):** The raw operand of a general variable containing the coordinates for the cost centers relative to the picture source MB. Must have type UW. Must have 16 elements
- **Output(raw_operand):** The raw operand of a general variable used to store the VME output data. Must have type UB. Number of elements is:
- 288 (field_value(StreamMode)!=0) and (field_value(SearchCtrl)!=3)
- 224 field_value(StreamMode)==0
- 352 (field_value(StreamMode)!=0) and (field_value(SearchCtrl)==3)
#### Properties
## Text
```
VME_IME (<streamMode>, <searchCtrl>) <surface> <UNIInput> <IMEInput> <ref0> <ref1> <costCenter> <output>
```
## Notes
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