src/math/pow_data.h

   1 /*
   2  * Copyright (c) 2018, Arm Limited.
   3  * SPDX-License-Identifier: MIT
   4  */
   5 #ifndef _POW_DATA_H
   6 #define _POW_DATA_H
   7
   8 #include <features.h>
   9
  10 #define POW_LOG_TABLE_BITS 7
  11 #define POW_LOG_POLY_ORDER 8
  12 extern hidden const struct pow_log_data {
  13         double ln2hi;
  14         double ln2lo;
  15         double poly[POW_LOG_POLY_ORDER - 1]; /* First coefficient is 1.  */
  16         /* Note: the pad field is unused, but allows slightly faster indexing.  */
  17         struct {
  18                 double invc, pad, logc, logctail;
  19         } tab[1 << POW_LOG_TABLE_BITS];
  20 } __pow_log_data;
  21
  22 #endif