| e_sinh.c (8870) | e_sinh.c (17141) |
|---|---|
| 1/* @(#)e_sinh.c 5.1 93/09/24 */ 2/* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13#ifndef lint | 1/* @(#)e_sinh.c 5.1 93/09/24 */ 2/* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13#ifndef lint |
| 14static char rcsid[] = "$Id: e_sinh.c,v 1.1.1.1 1994/08/19 09:39:44 jkh Exp $"; | 14static char rcsid[] = "$Id: e_sinh.c,v 1.2 1995/05/30 05:48:48 rgrimes Exp $"; |
| 15#endif 16 17/* __ieee754_sinh(x) 18 * Method : 19 * mathematically sinh(x) if defined to be (exp(x)-exp(-x))/2 20 * 1. Replace x by |x| (sinh(-x) = -sinh(x)). 21 * 2. 22 * E + E/(E+1) --- 47 unchanged lines hidden (view full) --- 70 return h*(t+t/(t+one)); 71 } 72 73 /* |x| in [22, log(maxdouble)] return 0.5*exp(|x|) */ 74 if (ix < 0x40862E42) return h*__ieee754_exp(fabs(x)); 75 76 /* |x| in [log(maxdouble), overflowthresold] */ 77 GET_LOW_WORD(lx,x); | 15#endif 16 17/* __ieee754_sinh(x) 18 * Method : 19 * mathematically sinh(x) if defined to be (exp(x)-exp(-x))/2 20 * 1. Replace x by |x| (sinh(-x) = -sinh(x)). 21 * 2. 22 * E + E/(E+1) --- 47 unchanged lines hidden (view full) --- 70 return h*(t+t/(t+one)); 71 } 72 73 /* |x| in [22, log(maxdouble)] return 0.5*exp(|x|) */ 74 if (ix < 0x40862E42) return h*__ieee754_exp(fabs(x)); 75 76 /* |x| in [log(maxdouble), overflowthresold] */ 77 GET_LOW_WORD(lx,x); |
| 78 if (ix<0x408633CE || (ix==0x408633ce)&&(lx<=(u_int32_t)0x8fb9f87d)) { | 78 if (ix<0x408633CE || ((ix==0x408633ce)&&(lx<=(u_int32_t)0x8fb9f87d))) { |
| 79 w = __ieee754_exp(0.5*fabs(x)); 80 t = h*w; 81 return t*w; 82 } 83 84 /* |x| > overflowthresold, sinh(x) overflow */ 85 return x*shuge; 86} | 79 w = __ieee754_exp(0.5*fabs(x)); 80 t = h*w; 81 return t*w; 82 } 83 84 /* |x| > overflowthresold, sinh(x) overflow */ 85 return x*shuge; 86} |