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>

*** 25,42 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #if defined(ELFOBJ)
! #pragma weak ilogbf = __ilogbf
! #endif
  
  #include "libm.h"
  #include "xpg6.h"       /* __xpg6 */
  
! #if defined(USE_FPSCALE) || defined(__x86)
  static const float two25 = 33554432.0F;
  #else
  /*
   * v: a non-zero subnormal |x|
   */
--- 25,40 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __ilogbf = ilogbf
  
  #include "libm.h"
  #include "xpg6.h"       /* __xpg6 */
  
! #if defined(__x86)
  static const float two25 = 33554432.0F;
  #else
  /*
   * v: a non-zero subnormal |x|
   */
*** 51,61 ****
          if (v & 0xf0)
                  r += 4, v >>= 4;
          v <<= 1;
          return (r + ((0xffffaa50 >> v) & 0x3));
  }
! #endif  /* defined(USE_FPSCALE) */
  
  static int
  raise_invalid(int v) {  /* SUSv3 requires ilogbf(0,+/-Inf,NaN) raise invalid */
  #ifndef lint
          if ((__xpg6 & _C99SUSv3_ilogb_0InfNaN_raises_invalid) != 0) {
--- 49,59 ----
          if (v & 0xf0)
                  r += 4, v >>= 4;
          v <<= 1;
          return (r + ((0xffffaa50 >> v) & 0x3));
  }
! #endif  /* defined(__x86) */
  
  static int
  raise_invalid(int v) {  /* SUSv3 requires ilogbf(0,+/-Inf,NaN) raise invalid */
  #ifndef lint
          if ((__xpg6 & _C99SUSv3_ilogb_0InfNaN_raises_invalid) != 0) {
*** 74,84 ****
  
          if (k < 0x00800000) {
                  if (k == 0)
                          return (raise_invalid(0x80000001));
                  else {
! #if defined(USE_FPSCALE) || defined(__x86)
                          x *= two25;
                          return (((*((int *) &x) & 0x7f800000) >> 23) - 152);
  #else
                          return (ilogbf_subnormal(k));
  #endif
--- 72,82 ----
  
          if (k < 0x00800000) {
                  if (k == 0)
                          return (raise_invalid(0x80000001));
                  else {
! #if defined(__x86)
                          x *= two25;
                          return (((*((int *) &x) & 0x7f800000) >> 23) - 152);
  #else
                          return (ilogbf_subnormal(k));
  #endif