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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:23 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:23 -0800 |
commit | f177c949113889342d74aee8011a86bd4f589841 (patch) | |
tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /s_rint.c | |
parent | 74aa530c6ca9c2f10a0e3635b4211f1438b972b2 (diff) | |
download | fdlibm-f177c949113889342d74aee8011a86bd4f589841.tar.gz |
auto import from //depot/cupcake/@135843
Diffstat (limited to 's_rint.c')
-rw-r--r-- | s_rint.c | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/s_rint.c b/s_rint.c deleted file mode 100644 index fbbd0fd..0000000 --- a/s_rint.c +++ /dev/null @@ -1,84 +0,0 @@ - -/* @(#)s_rint.c 1.3 95/01/18 */ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunSoft, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - -/* - * ieee_rint(x) - * Return x rounded to integral value according to the prevailing - * rounding mode. - * Method: - * Using floating addition. - * Exception: - * Inexact flag raised if x not equal to ieee_rint(x). - */ - -#include "fdlibm.h" - -#ifdef __STDC__ -static const double -#else -static double -#endif -TWO52[2]={ - 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */ - -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */ -}; - -#ifdef __STDC__ - double ieee_rint(double x) -#else - double ieee_rint(x) - double x; -#endif -{ - int i0,j0,sx; - unsigned i,i1; - double w,t; - i0 = __HI(x); - sx = (i0>>31)&1; - i1 = __LO(x); - j0 = ((i0>>20)&0x7ff)-0x3ff; - if(j0<20) { - if(j0<0) { - if(((i0&0x7fffffff)|i1)==0) return x; - i1 |= (i0&0x0fffff); - i0 &= 0xfffe0000; - i0 |= ((i1|-i1)>>12)&0x80000; - __HI(x)=i0; - w = TWO52[sx]+x; - t = w-TWO52[sx]; - i0 = __HI(t); - __HI(t) = (i0&0x7fffffff)|(sx<<31); - return t; - } else { - i = (0x000fffff)>>j0; - if(((i0&i)|i1)==0) return x; /* x is integral */ - i>>=1; - if(((i0&i)|i1)!=0) { - if(j0==19) i1 = 0x40000000; else - i0 = (i0&(~i))|((0x20000)>>j0); - } - } - } else if (j0>51) { - if(j0==0x400) return x+x; /* inf or NaN */ - else return x; /* x is integral */ - } else { - i = ((unsigned)(0xffffffff))>>(j0-20); - if((i1&i)==0) return x; /* x is integral */ - i>>=1; - if((i1&i)!=0) i1 = (i1&(~i))|((0x40000000)>>(j0-20)); - } - __HI(x) = i0; - __LO(x) = i1; - w = TWO52[sx]+x; - return w-TWO52[sx]; -} |