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# `__qadd8` intrinsic

This intrinsic inserts a `QADD8` instruction into the instruction stream generated by the compiler. It enables you to perform four 8-bit integer additions, saturating the results to the 8-bit signed integer range -27 x ≤ 27 - 1.

```unsigned int __qadd8(unsigned int `val1`, unsigned int `val2`)
```

Where:

`val1`

holds the first four 8-bit summands

`val2`

holds the other four 8-bit summands.

The `__qadd8` intrinsic returns:

• the saturated addition of the first byte of each operand in the first byte of the return value

• the saturated addition of the second byte of each operand in the second byte of the return value

• the saturated addition of the third byte of each operand in the third byte of the return value

• the saturated addition of the fourth byte of each operand in the fourth byte of the return value.

The returned results are saturated to the 8-bit signed integer range -27 x ≤ 27 - 1.

Example:

```unsigned int add_bytes(unsigned int val1, unsigned int val2)
{
unsigned int res;

res = __qadd8(val1,val2); /* res[7:0] = val1[7:0] + val2[7:0]
res[15:8] = val1[15:8] + val2[15:8]
res[23:16] = val1[23:16] + val2[23:16]
res[31:24] = val1[31:24] + val2[31:24]
*/
return res;
}
```