newlib/libm/machine/amdgcn/v64df_signif.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/mathfp/s_signif.c in Newlib.  */
  27
  28 #include "amdgcnmach.h"
  29
  30 v64df v64df_scalb_aux (v64df x, v64df fn, v64di);
  31 v64si v64df_ilogb_aux (v64df x, v64si);
  32
  33 DEF_VD_MATH_FUNC (v64df, significand, v64df x)
  34 {
  35   v64si si_mask = __builtin_convertvector (__mask, v64si);
  36   return v64df_scalb_aux (x, -__builtin_convertvector (v64df_ilogb_aux (x, si_mask), v64df), __mask);
  37 }
  38
  39 DEF_VARIANTS (significand, df, df)