k_sin.c File Reference

#include "math_libm.h"
#include "math_private.h"

Include dependency graph for k_sin.c:

Go to the source code of this file.

Functions
double attribute_hidden	__kernel_sin (double x, double y, int iy)

Variables
static const double	half = 5.00000000000000000000e-01
static const double	S1 = -1.66666666666666324348e-01
static const double	S2 = 8.33333333332248946124e-03
static const double	S3 = -1.98412698298579493134e-04
static const double	S4 = 2.75573137070700676789e-06
static const double	S5 = -2.50507602534068634195e-08
static const double	S6 = 1.58969099521155010221e-10

Function Documentation

double attribute_hidden __kernel_sin	(	double	x,
		double	y,
		int	iy
	)

Definition at line 52 of file k_sin.c.

References GET_HIGH_WORD, half, S1, S2, S3, S4, S5, and S6.

Referenced by cos(), and sin().

{
        double z,r,v;
        int32_t ix;
        GET_HIGH_WORD(ix,x);
        ix &= 0x7fffffff;                       /* high word of x */
        if(ix<0x3e400000)                       /* |x| < 2**-27 */
           {if((int)x==0) return x;}            /* generate inexact */
        z       =  x*x;
        v       =  z*x;
        r       =  S2+z*(S3+z*(S4+z*(S5+z*S6)));
        if(iy==0) return x+v*(S1+z*r);
        else      return x-((z*(half*y-v*r)-y)-v*S1);
}

Variable Documentation

const double half = 5.00000000000000000000e-01

static

Definition at line 44 of file k_sin.c.

Referenced by __kernel_sin().

const double S1 = -1.66666666666666324348e-01

static

Definition at line 45 of file k_sin.c.

Referenced by __kernel_sin().

const double S2 = 8.33333333332248946124e-03

static

Definition at line 46 of file k_sin.c.

Referenced by __kernel_sin().

const double S3 = -1.98412698298579493134e-04

static

Definition at line 47 of file k_sin.c.

Referenced by __kernel_sin().

const double S4 = 2.75573137070700676789e-06

static

Definition at line 48 of file k_sin.c.

Referenced by __kernel_sin().

const double S5 = -2.50507602534068634195e-08

static

Definition at line 49 of file k_sin.c.

Referenced by __kernel_sin().

const double S6 = 1.58969099521155010221e-10

static

Definition at line 50 of file k_sin.c.

Referenced by __kernel_sin().