e_log2l.c File Reference

#include <openlibm_math.h>
#include "math_private.h"

Include dependency graph for e_log2l.c:

Functions
static long double	neval (long double x, const long double *p, int n)
static long double	deval (long double x, const long double *p, int n)
long double	log2l (long double x)

Variables
static const long double	P [13]
static const long double	Q [12]
static const long double	R [6]
static const long double	S [6]
static const long double	LOG2EA = 4.4269504088896340735992468100189213742664595E-1L
static const long double	SQRTH = 7.071067811865475244008443621048490392848359E-1L

Function Documentation

deval()

static long double deval ( long double  x, const long double *  p, int  n  )

static

References n, and p.

Referenced by log2l().

log2l()

long double log2l

(

long double

x

)

References deval(), IEEEl2bits::e, frexpl(), GET_LDOUBLE_WORDS64, LOG2EA, neval(), P, Q, R, S, SQRTH, and z.

neval()

static long double neval ( long double  x, const long double *  p, int  n  )

static

References n, and p.

Referenced by log2l().

Variable Documentation

LOG2EA

const long double LOG2EA = 4.4269504088896340735992468100189213742664595E-1L

static

Referenced by log2l().

P

const long double P[13]

static

Initial value:

=
{
  1.313572404063446165910279910527789794488E4L,
  7.771154681358524243729929227226708890930E4L,
  2.014652742082537582487669938141683759923E5L,
  3.007007295140399532324943111654767187848E5L,
  2.854829159639697837788887080758954924001E5L,
  1.797628303815655343403735250238293741397E5L,
  7.594356839258970405033155585486712125861E4L,
  2.128857716871515081352991964243375186031E4L,
  3.824952356185897735160588078446136783779E3L,
  4.114517881637811823002128927449878962058E2L,
  2.321125933898420063925789532045674660756E1L,
  4.998469661968096229986658302195402690910E-1L,
  1.538612243596254322971797716843006400388E-6L
}

Referenced by log2l().

Q

const long double Q[12]

static

Initial value:

=
{
  3.940717212190338497730839731583397586124E4L,
  2.626900195321832660448791748036714883242E5L,
  7.777690340007566932935753241556479363645E5L,
  1.347518538384329112529391120390701166528E6L,
  1.514882452993549494932585972882995548426E6L,
  1.158019977462989115839826904108208787040E6L,
  6.132189329546557743179177159925690841200E5L,
  2.248234257620569139969141618556349415120E5L,
  5.605842085972455027590989944010492125825E4L,
  9.147150349299596453976674231612674085381E3L,
  9.104928120962988414618126155557301584078E2L,
  4.839208193348159620282142911143429644326E1L

}

Referenced by log2l().

R

const long double R[6]

static

Initial value:

=
{
  1.418134209872192732479751274970992665513E5L,
 -8.977257995689735303686582344659576526998E4L,
  2.048819892795278657810231591630928516206E4L,
 -2.024301798136027039250415126250455056397E3L,
  8.057002716646055371965756206836056074715E1L,
 -8.828896441624934385266096344596648080902E-1L
}

Referenced by log2l().

S

const long double S[6]

static

Initial value:

=
{
  1.701761051846631278975701529965589676574E6L,
 -1.332535117259762928288745111081235577029E6L,
  4.001557694070773974936904547424676279307E5L,
 -5.748542087379434595104154610899551484314E4L,
  3.998526750980007367835804959888064681098E3L,
 -1.186359407982897997337150403816839480438E2L

}

Referenced by log2l().

SQRTH

const long double SQRTH = 7.071067811865475244008443621048490392848359E-1L

static

Referenced by log2l().