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11210 libm should be cstyle(1ONBLD) clean
@@ -20,34 +20,39 @@
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
+
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma weak __round = round
#include "libm.h"
double
-round(double x) {
+round(double x)
+{
union {
unsigned i[2];
double d;
} xx;
+
unsigned hx, sx, i;
xx.d = x;
hx = xx.i[HIWORD] & ~0x80000000;
sx = xx.i[HIWORD] & 0x80000000;
+
if (hx < 0x43300000) { /* |x| < 2^52 */
if (hx < 0x3ff00000) { /* |x| < 1 */
if (hx >= 0x3fe00000)
return (sx ? -1.0 : 1.0);
+
return (sx ? -0.0 : 0.0);
}
/* round x at the integer bit */
if (hx < 0x41300000) {
@@ -55,20 +60,25 @@
xx.i[HIWORD] = (xx.i[HIWORD] + i) & ~(i | (i - 1));
xx.i[LOWORD] = 0;
} else {
i = 1 << (0x432 - (hx >> 20));
xx.i[LOWORD] += i;
+
if (xx.i[LOWORD] < i)
xx.i[HIWORD]++;
+
xx.i[LOWORD] &= ~(i | (i - 1));
}
+
return (xx.d);
- } else if (hx < 0x7ff00000)
+ } else if (hx < 0x7ff00000) {
return (x);
- else
+ } else {
#if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
return (hx >= 0x7ff80000 ? x : x + x);
+
/* assumes sparc-like QNaN */
#else
return (x + x);
#endif
+ }
}