| s_rint.c (175309) | s_rint.c (175480) |
|---|---|
| 1/* @(#)s_rint.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_rint.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_rint.c 175309 2008-01-14 02:12:07Z das $"; | 14static char rcsid[] = "$FreeBSD: head/lib/msun/src/s_rint.c 175480 2008-01-19 16:37:57Z bde $"; |
| 15#endif 16 17/* 18 * rint(x) 19 * Return x rounded to integral value according to the prevailing 20 * rounding mode. 21 * Method: 22 * Using floating addition. --- 23 unchanged lines hidden (view full) --- 46 j0 = ((i0>>20)&0x7ff)-0x3ff; 47 if(j0<20) { 48 if(j0<0) { 49 if(((i0&0x7fffffff)|i1)==0) return x; 50 i1 |= (i0&0x0fffff); 51 i0 &= 0xfffe0000; 52 i0 |= ((i1|-i1)>>12)&0x80000; 53 SET_HIGH_WORD(x,i0); | 15#endif 16 17/* 18 * rint(x) 19 * Return x rounded to integral value according to the prevailing 20 * rounding mode. 21 * Method: 22 * Using floating addition. --- 23 unchanged lines hidden (view full) --- 46 j0 = ((i0>>20)&0x7ff)-0x3ff; 47 if(j0<20) { 48 if(j0<0) { 49 if(((i0&0x7fffffff)|i1)==0) return x; 50 i1 |= (i0&0x0fffff); 51 i0 &= 0xfffe0000; 52 i0 |= ((i1|-i1)>>12)&0x80000; 53 SET_HIGH_WORD(x,i0); |
| 54 w = TWO52[sx]+x; | 54 STRICT_ASSIGN(double,w,TWO52[sx]+x); |
| 55 t = w-TWO52[sx]; 56 GET_HIGH_WORD(i0,t); 57 SET_HIGH_WORD(t,(i0&0x7fffffff)|(sx<<31)); 58 return t; 59 } else { 60 i = (0x000fffff)>>j0; 61 if(((i0&i)|i1)==0) return x; /* x is integral */ 62 i>>=1; --- 16 unchanged lines hidden (view full) --- 79 else return x; /* x is integral */ 80 } else { 81 i = ((u_int32_t)(0xffffffff))>>(j0-20); 82 if((i1&i)==0) return x; /* x is integral */ 83 i>>=1; 84 if((i1&i)!=0) i1 = (i1&(~i))|((0x40000000)>>(j0-20)); 85 } 86 INSERT_WORDS(x,i0,i1); | 55 t = w-TWO52[sx]; 56 GET_HIGH_WORD(i0,t); 57 SET_HIGH_WORD(t,(i0&0x7fffffff)|(sx<<31)); 58 return t; 59 } else { 60 i = (0x000fffff)>>j0; 61 if(((i0&i)|i1)==0) return x; /* x is integral */ 62 i>>=1; --- 16 unchanged lines hidden (view full) --- 79 else return x; /* x is integral */ 80 } else { 81 i = ((u_int32_t)(0xffffffff))>>(j0-20); 82 if((i1&i)==0) return x; /* x is integral */ 83 i>>=1; 84 if((i1&i)!=0) i1 = (i1&(~i))|((0x40000000)>>(j0-20)); 85 } 86 INSERT_WORDS(x,i0,i1); |
| 87 *(volatile double *)&w = TWO52[sx]+x; /* clip any extra precision */ | 87 STRICT_ASSIGN(double,w,TWO52[sx]+x); |
| 88 return w-TWO52[sx]; 89} 90 91#if (LDBL_MANT_DIG == 53) 92__weak_reference(rint, rintl); 93#endif | 88 return w-TWO52[sx]; 89} 90 91#if (LDBL_MANT_DIG == 53) 92__weak_reference(rint, rintl); 93#endif |