benchtests/bench-strtod.c

   1 /* Measure strtod implementation.
   2    Copyright (C) 2013-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #define TEST_MAIN
  20 #define TEST_NAME "strtod"
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include "bench-timing.h"
  25
  26 #undef INNER_LOOP_ITERS
  27 #define INNER_LOOP_ITERS 131072
  28
  29 static const char *inputs[] =
  30 {
  31   "1e308",
  32   "100000000e300",
  33   "0x1p1023",
  34   "0x1000p1011",
  35   "0x1p1020",
  36   "0x0.00001p1040" "1e-307",
  37   "0.000001e-301",
  38   "0.0000001e-300",
  39   "0.00000001e-299",
  40   "1000000e-313",
  41   "10000000e-314",
  42   "100000000e-315",
  43   "0x1p-1021",
  44   "0x1000p-1033",
  45   "0x10000p-1037",
  46   "0x0.001p-1009",
  47   "0x0.0001p-1005",
  48   "12.345",
  49   "12.345e19",
  50   "-.1e+9",
  51   ".125",
  52   "1e20",
  53   "0e-19",
  54   "4\00012",
  55   "5.9e-76",
  56   "0x1.4p+3",
  57   "0xAp0",
  58   "0x0Ap0",
  59   "0x0A",
  60   "0xA0",
  61   "0x0.A0p8",
  62   "0x0.50p9",
  63   "0x0.28p10",
  64   "0x0.14p11",
  65   "0x0.0A0p12",
  66   "0x0.050p13",
  67   "0x0.028p14",
  68   "0x0.014p15",
  69   "0x00.00A0p16",
  70   "0x00.0050p17",
  71   "0x00.0028p18",
  72   "0x00.0014p19",
  73   "0x1p-1023",
  74   "0x0.8p-1022",
  75   "Inf",
  76   "-Inf",
  77   "+InFiNiTy",
  78   "0x80000Ap-23",
  79   "1e-324",
  80   "0x100000000000008p0",
  81   "0x100000000000008.p0",
  82   "0x100000000000008.00p0",
  83   "0x10000000000000800p0",
  84   "0x10000000000000801p0",
  85   NULL
  86 };
  87
  88 int
  89 do_bench (void)
  90 {
  91   const size_t iters = INNER_LOOP_ITERS;
  92
  93   for (size_t i = 0; inputs[i] != NULL; ++i)
  94     {
  95       char *ep;
  96       timing_t start, stop, cur;
  97
  98       printf ("Input %-24s:", inputs[i]);
  99       TIMING_NOW (start);
 100       for (size_t j = 0; j < iters; ++j)
 101         strtod (inputs[i], &ep);
 102       TIMING_NOW (stop);
 103
 104       TIMING_DIFF (cur, start, stop);
 105       TIMING_PRINT_MEAN ((double) cur, (double) iters);
 106       putchar ('\n');
 107     }
 108
 109   return 0;
 110 }
 111
 112 #define TEST_FUNCTION do_bench ()
 113
 114 #include "../test-skeleton.c"