5261 libm should stop using synonyms.h
5298 fabs is 0-sized, confuses dis(1) and others
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Approved by: Gordon Ross <gwr@nexenta.com>
5262 libm needs to be carefully unifdef'd
5268 libm doesn't need to hide symbols which are already local
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
Reviewed by: Gordon Ross <gwr@nexenta.com>
Approved by: Gordon Ross <gwr@nexenta.com>

@@ -25,20 +25,18 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#if defined(ELFOBJ)
-#pragma weak logb = __logb
-#pragma weak _logb = __logb
-#endif
+#pragma weak __logb = logb
+#pragma weak _logb = logb
 
 #include "libm.h"
 #include "xpg6.h"       /* __xpg6 */
 #define _C99SUSv3_logb  _C99SUSv3_logb_subnormal_is_like_ilogb
 
-#if defined(USE_FPSCALE) || defined(__x86)
+#if defined(__x86)
 static const double two52 = 4503599627370496.0;
 #else
 /*
  * v: high part of a non-zero subnormal |x|; w: low part of |x|
  */

@@ -57,21 +55,21 @@
         if (v & 0xf0)
                 r += 4, v >>= 4;
         v <<= 1;
         return (r + ((0xffffaa50 >> v) & 0x3));
 }
-#endif  /* defined(USE_FPSCALE) */
+#endif  /* defined(__x86) */
 
 double
 logb(double x) {
         int *px = (int *) &x, k = px[HIWORD] & ~0x80000000;
 
         if (k < 0x00100000) {
                 if ((px[LOWORD] | k) == 0)
                         return (_SVID_libm_err(x, x, 45));
                 else if ((__xpg6 & _C99SUSv3_logb) != 0) {
-#if defined(USE_FPSCALE) || defined(__x86)
+#if defined(__x86)
                         x *= two52;
                         return ((double) (((px[HIWORD] & 0x7ff00000) >> 20)
                                 - 1075));
 #else
                         return ((double) ilogb_subnormal(k, px[LOWORD]));