math

Documentation

Index

• Constants
• func Add64(x, y, carry uint64) (sum, carryOut uint64)
• func Mul64(x, y uint64) (hi, lo uint64)
• func MulUintptr(a, b uintptr) (uintptr, bool)

Constants

const MaxUintptr = ^uintptr(0)

Functions

func Add64

func Add64(x, y, carry uint64) (sum, carryOut uint64)

Add64 returns the sum with carry of x, y and carry: sum = x + y + carry. The carry input must be 0 or 1; otherwise the behavior is undefined. The carryOut output is guaranteed to be 0 or 1.

This function's execution time does not depend on the inputs. On supported platforms this is an intrinsic lowered by the compiler.

func Mul64

func Mul64(x, y uint64) (hi, lo uint64)

Mul64 returns the 128-bit product of x and y: (hi, lo) = x * y with the product bits' upper half returned in hi and the lower half returned in lo. This is a copy from math/bits.Mul64 On supported platforms this is an intrinsic lowered by the compiler.

func MulUintptr

func MulUintptr(a, b uintptr) (uintptr, bool)

MulUintptr returns a * b and whether the multiplication overflowed. On supported platforms this is an intrinsic lowered by the compiler.