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>

*** 25,43 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #if defined(ELFOBJ)
! #pragma weak logbf = __logbf
! #endif
  
  #include "libm.h"
  #include "xpg6.h"       /* __xpg6 */
  #define _C99SUSv3_logb  _C99SUSv3_logb_subnormal_is_like_ilogb
  
! #if defined(USE_FPSCALE) || defined(__x86)
  static const float two25 = 33554432.0F;
  #else
  /*
   * v: a non-zero subnormal |x|
   */
--- 25,41 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __logbf = logbf
  
  #include "libm.h"
  #include "xpg6.h"       /* __xpg6 */
  #define _C99SUSv3_logb  _C99SUSv3_logb_subnormal_is_like_ilogb
  
! #if defined(__x86)
  static const float two25 = 33554432.0F;
  #else
  /*
   * v: a non-zero subnormal |x|
   */
*** 52,62 ****
          if (v & 0xf0)
                  r += 4, v >>= 4;
          v <<= 1;
          return (r + ((0xffffaa50 >> v) & 0x3));
  }
! #endif  /* defined(USE_FPSCALE) */
  
  static float
  raise_division(float t) {
  #pragma STDC FENV_ACCESS ON
          static const float zero = 0.0F;
--- 50,60 ----
          if (v & 0xf0)
                  r += 4, v >>= 4;
          v <<= 1;
          return (r + ((0xffffaa50 >> v) & 0x3));
  }
! #endif  /* defined(__x86) */
  
  static float
  raise_division(float t) {
  #pragma STDC FENV_ACCESS ON
          static const float zero = 0.0F;
*** 69,79 ****
  
          if (k < 0x00800000) {
                  if (k == 0)
                          return (raise_division(-1.0F));
                  else if ((__xpg6 & _C99SUSv3_logb) != 0) {
! #if defined(USE_FPSCALE) || defined(__x86)
                          x *= two25;
                          return ((float) (((*((int *) &x) & 0x7f800000) >> 23) -
                                  152));
  #else
                          return ((float) ilogbf_subnormal(k));
--- 67,77 ----
  
          if (k < 0x00800000) {
                  if (k == 0)
                          return (raise_division(-1.0F));
                  else if ((__xpg6 & _C99SUSv3_logb) != 0) {
! #if defined(__x86)
                          x *= two25;
                          return ((float) (((*((int *) &x) & 0x7f800000) >> 23) -
                                  152));
  #else
                          return ((float) ilogbf_subnormal(k));