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>

*** 25,44 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #if defined(ELFOBJ)
! #pragma weak scalbnf = __scalbnf
! #endif
  
  #include "libm.h"
  #include <float.h>              /* FLT_MAX, FLT_MIN */
  #include <stdlib.h>             /* abs */
  
  static const float twom25f = 2.98023223876953125e-8F;
! #if defined(USE_FPSCALE) || defined(__x86)
  static const float two23f = 8388608.0F;
  #else
  /*
   * v: a non-zero subnormal |x|; returns [-22, 0]
   */
--- 25,42 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __scalbnf = scalbnf
  
  #include "libm.h"
  #include <float.h>              /* FLT_MAX, FLT_MIN */
  #include <stdlib.h>             /* abs */
  
  static const float twom25f = 2.98023223876953125e-8F;
! #if defined(__x86)
  static const float two23f = 8388608.0F;
  #else
  /*
   * v: a non-zero subnormal |x|; returns [-22, 0]
   */
*** 53,63 ****
          if (v & 0xf0)
                  r += 4, v >>= 4;
          v <<= 1;
          return (r + ((0xffffaa50 >> v) & 0x3));
  }
! #endif  /* defined(USE_FPSCALE) */
  
  float
  scalbnf(float x, int n) {
          int *px = (int *) &x, ix, k;
  
--- 51,61 ----
          if (v & 0xf0)
                  r += 4, v >>= 4;
          v <<= 1;
          return (r + ((0xffffaa50 >> v) & 0x3));
  }
! #endif  /* defined(__x86) */
  
  float
  scalbnf(float x, int n) {
          int *px = (int *) &x, ix, k;
  
*** 70,80 ****
                  return (x + x);
  #endif
          if (ix == 0 || n == 0)
                  return (x);
          if (k == 0) {
! #if defined(USE_FPSCALE) || defined(__x86)
                  x *= two23f;
                  k = ((*px & ~0x80000000) >> 23) - 23;
  #else
                  k = ilogbf_biased(ix);
                  *px = (*px & 0x80000000) | (ix << (-k + 1));
--- 68,78 ----
                  return (x + x);
  #endif
          if (ix == 0 || n == 0)
                  return (x);
          if (k == 0) {
! #if defined(__x86)
                  x *= two23f;
                  k = ((*px & ~0x80000000) >> 23) - 23;
  #else
                  k = ilogbf_biased(ix);
                  *px = (*px & 0x80000000) | (ix << (-k + 1));