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Copyright (C) 2020-2021 Intel Corporation

SPDX-License-Identifier: MIT

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## Opcode

  OWORD_ST = 0x36

## Format

| | | | |
| --- | --- | --- | --- |
| 0x36(OWORD_ST) | Size | Surface | Offset | Src |


## Semantics




      for (i = 0; i < num_owords; ++i) {
        surface[offset+i] = src[i]; //16 byte, oword-aligned
      }

## Description


    Writes contiguous owords (one oword is 16 byte) to <surface> starting at <offset>, taking the values from <Src>. The execution mask is set to 'NoMask' (i.e., every element is written to).

- **Size(ub):** 
 
  - Bit[2..0]: Number of owords to write
 
    - 0b000:  1 oword 
    - 0b001:  2 owords 
    - 0b010:  4 owords 
    - 0b011:  8 owords
- **Surface(ub):** Index of the surface variable. It must be a buffer.

                - T0 (SLM): {ICLLP+} Yes. No for earlier platforms 
                - T5 (stateless): yes
      - **Offset(scalar):** The offset of the write in units of owords. Must have type UD

- **Src(raw_operand):** The raw operand of a general variable storing the values to be written

#### Properties
- **Out-of-bound Access:** On write: data is dropped.


## Text
```
    

		OWORD_ST (<size>) <surface> <offset> <src>
```


