8 | | || `mergeh(a, b)` || merge the high ~~N/2 fields of a and b~~ || |

9 | | || `mergel(a, b)` || merge the low ~~N/2 fields of a and b~~ || |

10 | | || `multh(a, b)` || multiply the high ~~N/2 fields of a and b~~ || |

11 | | || `multll(a, b)` || multiply the low ~~N/2 fields of a and b~~ || |

| 9 | || `mergeh(a, b)` || merge the high ''N''/2 fields of `a` and `b` || |

| 10 | || `mergel(a, b)` || merge the low ''N''/2 fields of `a` and `b` || |

| 11 | || `multh(a, b)` || multiply the high ''N''/2 fields of `a` and `b` || |

| 12 | || `multll(a, b)` || multiply the low ''N''/2 fields of `a` and `b` || |

15 | | || `signextendh(a)` || sign-extend the high ~~N/2 fields of a~~ || |

16 | | || `signextendl(a)` || sign-extend the low ~~N/2 fields of a~~ || |

17 | | || `zeroextendh(a)` || zero-extend the high ~~N/2 fields of a~~ || |

18 | | || `zeroextendl(a)` || zero-extend the low ~~N/2 fields of a~~ || |

| 16 | || `signextendh(a)` || sign-extend the high ''N''/2 fields of `a` || |

| 17 | || `signextendl(a)` || sign-extend the low ''N''/2 fields of `a` || |

| 18 | || `zeroextendh(a)` || zero-extend the high ''N''/2 fields of `a` || |

| 19 | || `zeroextendl(a)` || zero-extend the low ''N''/2 fields of `a` || |