src/math/log2_data.h

   1 /*
   2  * Copyright (c) 2018, Arm Limited.
   3  * SPDX-License-Identifier: MIT
   4  */
   5 #ifndef _LOG2_DATA_H
   6 #define _LOG2_DATA_H
   7
   8 #include <features.h>
   9
  10 #define LOG2_TABLE_BITS 6
  11 #define LOG2_POLY_ORDER 7
  12 #define LOG2_POLY1_ORDER 11
  13 extern hidden const struct log2_data {
  14         double invln2hi;
  15         double invln2lo;
  16         double poly[LOG2_POLY_ORDER - 1];
  17         double poly1[LOG2_POLY1_ORDER - 1];
  18         struct {
  19                 double invc, logc;
  20         } tab[1 << LOG2_TABLE_BITS];
  21 #if !__FP_FAST_FMA
  22         struct {
  23                 double chi, clo;
  24         } tab2[1 << LOG2_TABLE_BITS];
  25 #endif
  26 } __log2_data;
  27
  28 #endif