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<!---======================= begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ==========================-->
## Opcode
RAW_SEND = 0x5d
## Format
| | | | | | | |
| --- | --- | --- | --- | --- | --- | --- |
| 0x5d(RAW_SEND) | Modifiers | Exec_size | Pred | ExMsgDesc | NumSrc | NumDst |
| | Desc | Src | Dst | | | |
## Semantics
A direct method for generating a GEN native send message
## Description
A raw message send that will be translated into a GEN send instruction
- **Modifiers(ub):**
- Bit[0]: Determines whether send or sendc should be used
- 0b0: raw_send
- 0b1: raw_sendc
- **Exec_size(ub):** Execution size
- Bit[2..0]: size of the region for source and destination operands
- 0b000: 1 element (scalar)
- 0b001: 2 elements
- 0b010: 4 elements
- 0b011: 8 elements
- 0b100: 16 elements
- 0b101: 32 elements
- Bit[7..4]: execution mask (explicit control over the enabled channels)
- 0b0000: M1
- 0b0001: M2
- 0b0010: M3
- 0b0011: M4
- 0b0100: M5
- 0b0101: M6
- 0b0110: M7
- 0b0111: M8
- 0b1000: M1_NM
- 0b1001: M2_NM
- 0b1010: M3_NM
- 0b1011: M4_NM
- 0b1100: M5_NM
- 0b1101: M6_NM
- 0b1110: M7_NM
- 0b1111: M8_NM
- **Pred(uw):** Predication control
- **ExMsgDesc(ud):** Extended message descriptor for the send
- **NumSrc(ub):** Number of GRF registers for the send message payload. Valid values are [1-15]
- **NumDst(ub):** Number of GRF registers for the send message response. Valid values are [0-16]
- **Desc(scalar):** Message descriptor for the send. Must have type UD
- **Src(raw_operand):** The raw operand of a general variable storing the send message payload
- **Dst(raw_operand):** The raw operand of a general variable storing send message response
#### Properties
## Text
```
[(<P>)] {raw_send|raw_sendc} (<exec_size>) <ExMsgDesc> <NumSrc> <NumDst> <Desc> <Src> <Dst>
```
## Notes
This instruction is intended for expert users who want to access a fixed
function that is currently not available in vISA. As such, it is the
user's responsibility to ensure that the message descriptor, shared
function id, together with the message source and destination form a
correct send instruction for the given GEN platform. The JIT-compiler
simply translates it into a GEN send instruction without any error
check.
|
