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<!---======================= begin_copyright_notice ============================
Copyright (C) 2020-2022 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ==========================-->
## Opcode
DIV = 0x03
## Format
| | | | | | |
| --- | --- | --- | --- | --- | --- |
| 0x03(DIV) | Exec_size | Pred | Dst | Src0 | Src1 |
## Semantics
```
for (i = 0; i < exec_size; ++i) {
if (ChEn[i]) {
dst[i] = src0[i] / src1[i];
}
}
```
## Description
```
Divides <src0> by <src1> component-wise, and stores the result into <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,immediate
- **Src1(vec_operand):** The second source operand. Operand class: general,indirect,immediate
#### Properties
- **Supported Types:** B,D,F,HF,UB,UD,UW,W
- **Saturation:** Only when type is float
- **Source Modifier:** arithmetic
## Text
```
[(<P>)] DIV[.sat] (<exec_size>) <dst> <src0> <src1>
```
## Notes
Integer divide with signed inputs follow the rules below for the signs of the quotient and remainder.
+------------+------------------+-----+-----+-----+-----+
| Inputs: | Numerator | \+ | \+ | \- | \- |
+------------+------------------+-----+-----+-----+-----+
| | Denominator | \+ | \- | \+ | \- |
+------------+------------------+-----+-----+-----+-----+
| Outputs: | Quotient | \+ | \- | \- | \+ |
+------------+------------------+-----+-----+-----+-----+
| | Remainder | \+ | \+ | \- | \- |
+------------+------------------+-----+-----+-----+-----+
Floating point divide (x/y) is implemented as x * INV(y). DIVM provides the IEEE-conforming correctly rounded results.
|
