newlib/libm/machine/amdgcn/v64sf_log2.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 #include "amdgcnmach.h"
  16
  17 v64sf v64sf_logf_aux (v64sf, v64si);
  18
  19 static const float C3 = 1.4426950408889634073599246810019;
  20
  21 DEF_VS_MATH_FUNC (v64sf, log2f, v64sf x)
  22 {
  23   return v64sf_logf_aux (x, __mask) * C3;
  24 }
  25
  26 DEF_VARIANTS (log2f, sf, sf)