math

func Abs ¶

func Abs(x float64) float64

Abs returns the absolute value of x.

Special cases are:

Abs(±Inf) = +Inf
Abs(NaN) = NaN

func Abs32 ¶

func Abs32(x float32) float32

Abs32 is like Abs but for float32.

func Ceil ¶

func Ceil(x float64) float64

Ceil returns the least integer value greater than or equal to x.

Special cases are:

Ceil(±0) = ±0
Ceil(±Inf) = ±Inf
Ceil(NaN) = NaN

func Float32bits ¶

func Float32bits(f float32) uint32

Float32bits returns the IEEE 754 binary representation of f.

func Float32frombits ¶

func Float32frombits(b uint32) float32

Float32frombits returns the floating point number corresponding to the IEEE 754 binary representation b.

func Float64bits ¶

func Float64bits(f float64) uint64

Float64bits returns the IEEE 754 binary representation of f.

func Float64frombits ¶

func Float64frombits(b uint64) float64

Float64frombits returns the floating point number corresponding the IEEE 754 binary representation b.

func Floor ¶

func Floor(x float64) float64

Floor returns the greatest integer value less than or equal to x.

Special cases are:

Floor(±0) = ±0
Floor(±Inf) = ±Inf
Floor(NaN) = NaN

func Frexpi ¶

func Frexpi(f float64) (int64, int)

func Frexpi32 ¶

func Frexpi32(f float32) (int32, int)

func Inf ¶

func Inf(sign int) float64

Inf returns positive infinity if sign >= 0, negative infinity if sign < 0.

func Inf32 ¶

func Inf32(sign int) float32

Inf32 is like Inf but for float32.

func IsInf ¶

func IsInf(f float64, sign int) bool

IsInf reports whether f is an infinity, according to sign. If sign > 0, IsInf reports whether f is positive infinity. If sign < 0, IsInf reports whether f is negative infinity. If sign == 0, IsInf reports whether f is either infinity.

func IsInf32 ¶

func IsInf32(f float32, sign int) bool

IsInf32 is like IsInf but for float32.

func IsNaN ¶

func IsNaN(f float64) (is bool)

IsNaN reports whether f is an IEEE 754 “not-a-number” value.

func IsNaN32 ¶

func IsNaN32(f float32) (is bool)

IsNaN32 is like IsNaN but for float32.

func Modf ¶

func Modf(f float64) (int float64, frac float64)

Modf returns integer and fractional floating-point numbers that sum to f. Both values have the same sign as f.

Special cases are:

Modf(±Inf) = ±Inf, NaN
Modf(NaN) = NaN, NaN

func MulDiv ¶

func MulDiv(x, m, d uint64) uint64

MulDiv returns uint64(uint128(x) * uint128(m) / uint128(d)).

func MulDivUp ¶

func MulDivUp(x, m, d uint64) uint64

func NaN ¶

func NaN() float64

NaN returns an IEEE 754 “not-a-number” value.

func NaN32 ¶

func NaN32() float32

NaN32 is like NaN but for float32.

func Signbit ¶

func Signbit(x float64) bool

Signbit returns true if x is negative or negative zero.

func Signbit32 ¶

func Signbit32(x float32) bool

Signbit32 is like Signbit but for float32.

func Trunc ¶

func Trunc(x float64) float64

Trunc returns the integer value of x.

Special cases are:

Trunc(±0) = ±0
Trunc(±Inf) = ±Inf
Trunc(NaN) = NaN