e_exp.c File Reference

Functions
double	__ieee754_exp (double x) double __ieee754_exp(x) double x
hx &	if (hx >=0x40862E42)
	if (hx > 0x3fd62e42)
else	if (hx< 0x3e300000)
	if (k==0)

Variables
static const static double double	one = 1.0
static const static double double	halF [2] = {0.5,-0.5,}
static const static double double	huge = 1.0e+300
static const static double double	twom1000 = 9.33263618503218878990e-302
static const static double double	o_threshold = 7.09782712893383973096e+02
static const static double double	u_threshold = -7.45133219101941108420e+02
static const static double double	ln2HI [2]
static const static double double	ln2LO [2]
static const static double double	invln2 = 1.44269504088896338700e+00
static const static double double	P1 = 1.66666666666666019037e-01
static const static double double	P2 = -2.77777777770155933842e-03
static const static double double	P3 = 6.61375632143793436117e-05
static const static double double	P4 = -1.65339022054652515390e-06
static const static double double	P5 = 4.13813679705723846039e-08
int	k
int	xsb = (hx >> 31) & 1
unsigned	hx = __HI(x)
	t = x * x
	c = x - t * (P1 + t * (P2 + t * (P3 + t * (P4 + t * P5))))
	else

Function Documentation

__ieee754_exp()

double __ieee754_exp

(

double

x

)

if() [1/4]

if	(	hx	,
		0x3fd62e42	)

if() [2/4]

hx & if

(

hx >=

0x40862E42

)

if() [3/4]

else if

(

)

if() [4/4]

if

(

k

= = 0

)

Variable Documentation

c

c = x - t * (P1 + t * (P2 + t * (P3 + t * (P4 + t * P5))))

else

else

Initial value:

{
        __HI(y) += ((k + 1000) << 20)

halF

const static double double halF[2] = {0.5,-0.5,}

static

huge

const static double double huge = 1.0e+300

static

hx

hx = __HI(x)

invln2

const static double double invln2 = 1.44269504088896338700e+00

static

k

else k

Initial value:

{
    double y, hi, lo, c, t

ln2HI

const static double double ln2HI[2]

static

Initial value:

={ 6.93147180369123816490e-01,  
         -6.93147180369123816490e-01,}

ln2LO

const static double double ln2LO[2]

static

Initial value:

={ 1.90821492927058770002e-10,  
         -1.90821492927058770002e-10,}

o_threshold

const static double double o_threshold = 7.09782712893383973096e+02

static

one

const static double double one = 1.0

static

P1

const static double double P1 = 1.66666666666666019037e-01

static

P2

const static double double P2 = -2.77777777770155933842e-03

static

P3

const static double double P3 = 6.61375632143793436117e-05

static

P4

const static double double P4 = -1.65339022054652515390e-06

static

P5

const static double double P5 = 4.13813679705723846039e-08

static

t

t = x * x

twom1000

return y * twom1000 = 9.33263618503218878990e-302

static

u_threshold

const static double double u_threshold = -7.45133219101941108420e+02

static

xsb

xsb = (hx >> 31) & 1