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authorThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:23 -0800
committerThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:23 -0800
commitf177c949113889342d74aee8011a86bd4f589841 (patch)
tree4b825dc642cb6eb9a060e54bf8d69288fbee4904 /s_rint.c
parent74aa530c6ca9c2f10a0e3635b4211f1438b972b2 (diff)
downloadfdlibm-f177c949113889342d74aee8011a86bd4f589841.tar.gz
auto import from //depot/cupcake/@135843
Diffstat (limited to 's_rint.c')
-rw-r--r--s_rint.c84
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];
-}