e_log.c File Reference

Functions
double	__ieee754_log (double x) double __ieee754_log(x) double x
	if (hx< 0x00100000)
	if (hx >=0x7ff00000)
	__HI (x)
	if (i > 0)

Variables
static const static double double	ln2_hi = 6.93147180369123816490e-01
static const static double double	ln2_lo = 1.90821492927058770002e-10
static const static double double	two54 = 1.80143985094819840000e+16
static const static double double	Lg1 = 6.666666666666735130e-01
static const static double double	Lg2 = 3.999999999940941908e-01
static const static double double	Lg3 = 2.857142874366239149e-01
static const static double double	Lg4 = 2.222219843214978396e-01
static const static double double	Lg5 = 1.818357216161805012e-01
static const static double double	Lg6 = 1.531383769920937332e-01
static const static double double	Lg7 = 1.479819860511658591e-01
static double	zero = 0.0
int	k
int	hx = __HI(x)
int	i = (hx + 0x95f64) & 0x100000
int	j = 0x6b851 - hx
unsigned	lx = __LO(x)
	f = x - 1.0
	s = f / (2.0 + f)
	dk = (double)k
	z = s * s
	w = z * z
	t1 = w * (Lg2 + w * (Lg4 + w * Lg6))
	t2 = z * (Lg1 + w * (Lg3 + w * (Lg5 + w * Lg7)))
	R = t2 + t1

Function Documentation

__HI()

__HI

(

x

)

__ieee754_log()

double __ieee754_log

(

double

x

)

if() [1/3]

if

(

hx >=

0x7ff00000

)

if() [2/3]

if

(

)

if() [3/3]

if	(	i	,
		0	)

Variable Documentation

dk

dk = (double)k

f

f = x - 1.0

hx

hx = __HI(x)

i

hx & i = (hx + 0x95f64) & 0x100000

j

j = 0x6b851 - hx

k

k

Initial value:

{
    double hfsq, f, s, z, R, w, t1, t2, dk

Lg1

const static double double Lg1 = 6.666666666666735130e-01

static

Lg2

const static double double Lg2 = 3.999999999940941908e-01

static

Lg3

const static double double Lg3 = 2.857142874366239149e-01

static

Lg4

const static double double Lg4 = 2.222219843214978396e-01

static

Lg5

const static double double Lg5 = 1.818357216161805012e-01

static

Lg6

const static double double Lg6 = 1.531383769920937332e-01

static

Lg7

const static double double Lg7 = 1.479819860511658591e-01

static

ln2_hi

const static double double ln2_hi = 6.93147180369123816490e-01

static

ln2_lo

const static double double ln2_lo = 1.90821492927058770002e-10

static

lx

lx = __LO(x)

R

R = t2 + t1

s

s = f / (2.0 + f)

t1

t1 = w * (Lg2 + w * (Lg4 + w * Lg6))

t2

t2 = z * (Lg1 + w * (Lg3 + w * (Lg5 + w * Lg7)))

two54

const static double double two54 = 1.80143985094819840000e+16

static

w

w = z * z

z

return s * z = s * s

zero

double zero = 0.0

static