Click an item in the table below for details about that function.

abs | |`x` | |

abs-diff | |`x` -`y` | without modulo overflow |

add_sat | `x` +`y` and saturate result |

hadd | (`x` +`y` ) >> 1 without modulo overflow |

rhadd | (`x` +`y` +1) >> 1. The intermediate sum
does not modulo overflow. |

clz | Number of leading 0-bits in `x` |

mad_hi | `mul_hi` (`a` ,`b` )+`c` |

mad24 | (Fast integer function.) Multiply 24-bit integer then add the 32-bit result to 32-bit integer |

mad_sat | `a` *`b` +`c` and saturate the result |

max | The greater of `x` or `y` |

min | The lessor of `x` or `y` |

mul_hi | High half of the product of `x` and `y` |

mul24 | (Fast integer function.) Multiply 24-bit integer values `a` and `b` |

rotate | result[`indx` ]=`v` [`indx` ]<<`i` [`indx` ] |

sub_sat | `x` - `y` and saturate the result |

upsample | `result` [i] = ((gentype)`hi` [i] << 8|16|32) | `lo` [i] |

Built-in integer functions can be used to take scalar or vector arguments. We use
the generic type name gentype to indicate that the function can take char, char{2|4|8|16}, uchar, uchar{2|4|8|16}, short, short{2|4|8|16}, ushort, ushort{2|4|8|16}, int, int{2|4|8|16}, uint,
uint{2|4|8|16}, long, long{2|4|8|16}, ulong, or ulong{2|4|8|16} as
the type for the arguments. We use the generic type name ugentype to refer to unsigned
versions of gentype. For example, if gentype is char4, ugentype is `uchar4`

.

For any specific use of a function, the actual type has to be the same for all arguments and the return type unless otherwise specified.

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