newlib/libm/machine/amdgcn/v64df_isnan.c

   1 /*
   2  * Copyright 2023 Siemens
   3  *
   4  * The authors hereby grant permission to use, copy, modify, distribute,
   5  * and license this software and its documentation for any purpose, provided
   6  * that existing copyright notices are retained in all copies and that this
   7  * notice is included verbatim in any distributions.  No written agreement,
   8  * license, or royalty fee is required for any of the authorized uses.
   9  * Modifications to this software may be copyrighted by their authors
  10  * and need not follow the licensing terms described here, provided that
  11  * the new terms are clearly indicated on the first page of each file where
  12  * they apply.
  13  */
  14
  15 /*
  16  * ====================================================
  17  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  18  *
  19  * Developed at SunPro, a Sun Microsystems, Inc. business.
  20  * Permission to use, copy, modify, and distribute this
  21  * software is freely granted, provided that this notice
  22  * is preserved.
  23  * ====================================================
  24  */
  25
  26 /* Based on newlib/libm/common/s_isnan.c in Newlib.  */
  27
  28 #include "amdgcnmach.h"
  29
  30 DEF_VD_MATH_PRED (v64si, isnan, v64df x)
  31 {
  32   v64si hx, lx;
  33   EXTRACT_WORDS (hx, lx, x);
  34   hx &= 0x7fffffff;
  35   hx |= (lx | (-lx)) >> 31;
  36   hx = 0x7ff00000 - hx;
  37
  38   return (hx >> 31) != 0;
  39 }
  40
  41 DEF_VARIANTS (isnan, si, df)