# dadd (sm5 - asm)

Component-wise double-precision add.

dadd[_sat] dest[.mask], [-]src0[_abs][.swizzle], [-]src1[_abs][.swizzle] |
---|

Item | Description |
---|---|

[in] The address of the result of the operation. | |

[in] The components to add with | |

[in] The components to add with |

## Remarks

The valid swizzles for the source parameters are
.xyzw, .xyxy, .zwxy, .zwzw. The valid *dest* masks
are .xy, .zw, and .xyzw. The following mappings
are post-swizzle:

*dest*is a double vec2 across (x 32LSB, y 32MSB) and (z 32LSB, w 32MSB).*src0*is a double vec2 across (x 32LSB, y 32MSB) and (z 32LSB, w 32MSB).*src1*is a double vec2 across (x 32LSB, y 32MSB) and (z 32LSB, w 32MSB).

The following table shows the results obtained when executing the instruction with various classes of numbers, assuming that neither overflow or underflow occurs.

F means finite-real number.

**src0****src1->**
| -inf | -F | -0 | +0 | +F | +inf | NaN |

-inf | -inf | -inf | -inf | -inf | -inf | NaN | NaN |

-F | -inf | -F | src0 | src0 | +-F or +-0 | +inf | NaN |

-0 | -inf | src1 | -0 | +0 | src1 | +inf | NaN |

+0 | -inf | src1 | +0 | +0 | src1 | +inf | NaN |

+F | -inf | +-F or +-0 | src0 | src0 | +F | +inf | NaN |

+inf | NaN | +inf | +inf | +inf | +inf | +inf | NaN |

NaN | NaN | NaN | NaN | NaN | NaN | NaN | NaN |

This instruction applies to the following shader stages:

Vertex | Hull | Domain | Geometry | Pixel | Compute |
---|---|---|---|---|---|

X | X | X | X | X | X |

## Minimum Shader Model

This instruction is supported in the following shader models:

Shader Model | Supported |
---|---|

Shader Model 5 | yes |

Shader Model 4.1 | no |

Shader Model 4 | no |

Shader Model 3 (DirectX HLSL) | no |

Shader Model 2 (DirectX HLSL) | no |

Shader Model 1 (DirectX HLSL) | no |

## Related topics

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