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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>

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          --- old/usr/src/lib/libm/common/C/asin.c
          +++ new/usr/src/lib/libm/common/C/asin.c
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  20   20   */
  21   21  
  22   22  /*
  23   23   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24   24   */
  25   25  /*
  26   26   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  27   27   * Use is subject to license terms.
  28   28   */
  29   29  
  30      -#pragma weak asin = __asin
       30 +#pragma weak __asin = asin
  31   31  
  32   32  /* INDENT OFF */
  33   33  /*
  34   34   * asin(x)
  35   35   * Method :
  36   36   *      Since  asin(x) = x + x^3/6 + x^5*3/40 + x^7*15/336 + ...
  37   37   *      we approximate asin(x) on [0,0.5] by
  38   38   *              asin(x) = x + x*x^2*R(x^2)
  39   39   *      where
  40   40   *              R(x^2) is a rational approximation of (asin(x)-x)/x^3
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  55   55   *                      = pio4_hi+(pio4-2s)-(2s*z*R(z)-pio2_lo)
  56   56   *                      = pio4_hi+(pio4-2f)-(2s*z*R(z)-(pio2_lo+2c))
  57   57   *
  58   58   * Special cases:
  59   59   *      if x is NaN, return x itself;
  60   60   *      if |x|>1, return NaN with invalid signal.
  61   61   *
  62   62   */
  63   63  /* INDENT ON */
  64   64  
  65      -#include "libm_synonyms.h"      /* __asin, __sqrt, __isnan */
  66   65  #include "libm_protos.h"        /* _SVID_libm_error */
  67   66  #include "libm_macros.h"
  68   67  #include <math.h>
  69   68  
  70   69  /* INDENT OFF */
  71   70  static const double xxx[] = {
  72   71  /* one */        1.00000000000000000000e+00,    /* 3FF00000, 00000000 */
  73   72  /* huge */       1.000e+300,
  74   73  /* pio2_hi */    1.57079632679489655800e+00,    /* 3FF921FB, 54442D18 */
  75   74  /* pio2_lo */    6.12323399573676603587e-17,    /* 3C91A626, 33145C07 */
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