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<!---======================= begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ==========================-->
## Opcode
MAD = 0x0c
## Format
| | | | | | |
| --- | --- | --- | --- | --- | --- |
| 0x0c(MAD) | Exec_size | Pred | Dst | Src0 | Src1 | Src2 |
## Semantics
for (i = 0; < exec_size; ++i){
if (ChEn[i]) {
dst[n] = src0[i] * src1[i] + src2[i];
}
}
## Description
Performs component-wise multiply add of <src0>, <src1>, and <src2> and stores the results in <dst>.
- **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
- **Dst(vec_operand):** The destination operand. Operand class: general,indirect
- **Src0(vec_operand):** The first source operand. Operand class: general,indirect,immediate16
- **Src1(vec_operand):** The second source operand. Operand class: general,indirect,immediate16
- **Src2(vec_operand):** The third source operand. Operand class: general,indirect,immediate16
#### Properties
- **Supported Types:** B,D,DF,F,HF,UB,UD,UW,W
- **Saturation:** Only when type is float
- **Source Modifier:** arithmetic
## Text
```
[(<P>)] MAD[.sat] (<exec_size>) <dst> <src0> <src1> <src2>
```
## Notes
Floating point type MAD is guaranteed to be translated into a HW mad instruction. Integer type MAD may be translated to either mac or multiply and add; for the latter the intermediate result of the multiply will have the same type of as the final destination.
|
