| s_scalbn.c (21673) | s_scalbn.c (22808) |
|---|---|
| 1/* @(#)s_scalbn.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/* @(#)s_scalbn.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[] = "$FreeBSD: head/lib/msun/src/s_scalbn.c 21673 1997-01-14 07:20:47Z jkh $"; | 14static char rcsid[] = "$FreeBSD: head/lib/msun/src/s_scalbn.c 22808 1997-02-16 18:26:31Z bde $"; |
| 15#endif 16 17/* 18 * scalbn (double x, int n) 19 * scalbn(x,n) returns x* 2**n computed by exponent 20 * manipulation rather than by actually performing an 21 * exponentiation or a multiplication. 22 */ --- 7 unchanged lines hidden (view full) --- 30static double 31#endif 32two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */ 33twom54 = 5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */ 34huge = 1.0e+300, 35tiny = 1.0e-300; 36 37#ifdef __STDC__ | 15#endif 16 17/* 18 * scalbn (double x, int n) 19 * scalbn(x,n) returns x* 2**n computed by exponent 20 * manipulation rather than by actually performing an 21 * exponentiation or a multiplication. 22 */ --- 7 unchanged lines hidden (view full) --- 30static double 31#endif 32two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */ 33twom54 = 5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */ 34huge = 1.0e+300, 35tiny = 1.0e-300; 36 37#ifdef __STDC__ |
| 38 double scalbn (double x, int n) | 38 double __generic_scalbn (double x, int n) |
| 39#else | 39#else |
| 40 double scalbn (x,n) | 40 double __generic_scalbn (x,n) |
| 41 double x; int n; 42#endif 43{ 44 int32_t k,hx,lx; 45 EXTRACT_WORDS(hx,lx,x); 46 k = (hx&0x7ff00000)>>20; /* extract exponent */ 47 if (k==0) { /* 0 or subnormal x */ 48 if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */ --- 18 unchanged lines hidden --- | 41 double x; int n; 42#endif 43{ 44 int32_t k,hx,lx; 45 EXTRACT_WORDS(hx,lx,x); 46 k = (hx&0x7ff00000)>>20; /* extract exponent */ 47 if (k==0) { /* 0 or subnormal x */ 48 if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */ --- 18 unchanged lines hidden --- |