diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/e_sinh.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_sinh.c | 69 |
1 files changed, 38 insertions, 31 deletions
diff --git a/sysdeps/ieee754/dbl-64/e_sinh.c b/sysdeps/ieee754/dbl-64/e_sinh.c index b954100baa..851b510aaa 100644 --- a/sysdeps/ieee754/dbl-64/e_sinh.c +++ b/sysdeps/ieee754/dbl-64/e_sinh.c @@ -38,43 +38,50 @@ static char rcsid[] = "$NetBSD: e_sinh.c,v 1.7 1995/05/10 20:46:13 jtc Exp $"; static const double one = 1.0, shuge = 1.0e307; double -__ieee754_sinh(double x) +__ieee754_sinh (double x) { - double t,w,h; - int32_t ix,jx; - u_int32_t lx; + double t, w, h; + int32_t ix, jx; + u_int32_t lx; - /* High word of |x|. */ - GET_HIGH_WORD(jx,x); - ix = jx&0x7fffffff; + /* High word of |x|. */ + GET_HIGH_WORD (jx, x); + ix = jx & 0x7fffffff; - /* x is INF or NaN */ - if(__builtin_expect(ix>=0x7ff00000, 0)) return x+x; + /* x is INF or NaN */ + if (__builtin_expect (ix >= 0x7ff00000, 0)) + return x + x; - h = 0.5; - if (jx<0) h = -h; - /* |x| in [0,22], return sign(x)*0.5*(E+E/(E+1))) */ - if (ix < 0x40360000) { /* |x|<22 */ - if (__builtin_expect(ix<0x3e300000, 0)) /* |x|<2**-28 */ - if(shuge+x>one) - return x;/* sinh(tiny) = tiny with inexact */ - t = __expm1(fabs(x)); - if(ix<0x3ff00000) return h*(2.0*t-t*t/(t+one)); - return h*(t+t/(t+one)); - } + h = 0.5; + if (jx < 0) + h = -h; + /* |x| in [0,22], return sign(x)*0.5*(E+E/(E+1))) */ + if (ix < 0x40360000) /* |x|<22 */ + { + if (__builtin_expect (ix < 0x3e300000, 0)) /* |x|<2**-28 */ + if (shuge + x > one) + return x; + /* sinh(tiny) = tiny with inexact */ + t = __expm1 (fabs (x)); + if (ix < 0x3ff00000) + return h * (2.0 * t - t * t / (t + one)); + return h * (t + t / (t + one)); + } - /* |x| in [22, log(maxdouble)] return 0.5*exp(|x|) */ - if (ix < 0x40862e42) return h*__ieee754_exp(fabs(x)); + /* |x| in [22, log(maxdouble)] return 0.5*exp(|x|) */ + if (ix < 0x40862e42) + return h * __ieee754_exp (fabs (x)); - /* |x| in [log(maxdouble), overflowthresold] */ - GET_LOW_WORD(lx,x); - if (ix<0x408633ce || ((ix==0x408633ce)&&(lx<=(u_int32_t)0x8fb9f87d))) { - w = __ieee754_exp(0.5*fabs(x)); - t = h*w; - return t*w; - } + /* |x| in [log(maxdouble), overflowthresold] */ + GET_LOW_WORD (lx, x); + if (ix < 0x408633ce || ((ix == 0x408633ce) && (lx <= (u_int32_t) 0x8fb9f87d))) + { + w = __ieee754_exp (0.5 * fabs (x)); + t = h * w; + return t * w; + } - /* |x| > overflowthresold, sinh(x) overflow */ - return x*shuge; + /* |x| > overflowthresold, sinh(x) overflow */ + return x * shuge; } strong_alias (__ieee754_sinh, __sinh_finite) |