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glibc  2.9
Functions
s_sinl.c File Reference
#include "math.h"
#include "math_private.h"
#include <math_ldbl_opt.h>

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Functions

long double __sinl (long double x)
 long_double_symbol (libm, __sinl, sinl)

Function Documentation

long double __sinl ( long double  x)

Definition at line 54 of file s_sinl.c.

{
       long double y[2],z=0.0L;
       int64_t n, ix;

    /* High word of x. */
       GET_LDOUBLE_MSW64(ix,x);

    /* |x| ~< pi/4 */
       ix &= 0x7fffffffffffffffLL;
       if(ix <= 0x3fe921fb54442d10LL)
         return __kernel_sinl(x,z,0);

    /* sin(Inf or NaN) is NaN */
       else if (ix>=0x7ff0000000000000LL) return x-x;

    /* argument reduction needed */
       else {
           n = __ieee754_rem_pio2l(x,y);
           switch(n&3) {
              case 0: return  __kernel_sinl(y[0],y[1],1);
              case 1: return  __kernel_cosl(y[0],y[1]);
              case 2: return -__kernel_sinl(y[0],y[1],1);
              default:
                     return -__kernel_cosl(y[0],y[1]);
           }
       }
}

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long_double_symbol ( libm  ,
__sinl  ,
sinl   
)