tests/test-frexpl.c

   1 /* Test of splitting a 'long double' into fraction and mantissa.
   2    Copyright (C) 2007-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  18
  19 #include <config.h>
  20
  21 #include <math.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (frexpl, long double, (long double, int *));
  25
  26 #include <float.h>
  27
  28 #include "fpucw.h"
  29 #include "isnanl-nolibm.h"
  30 #include "minus-zero.h"
  31 #include "infinity.h"
  32 #include "nan.h"
  33 #include "macros.h"
  34
  35 /* Avoid some warnings from "gcc -Wshadow".
  36    This file doesn't use the exp() function.  */
  37 #undef exp
  38 #define exp exponent
  39
  40 #undef INFINITY
  41 #undef NAN
  42
  43 #define DOUBLE long double
  44 #define VOLATILE
  45 #define ISNAN isnanl
  46 #define INFINITY Infinityl ()
  47 #define NAN NaNl ()
  48 #define L_(literal) literal##L
  49 #define MINUS_ZERO minus_zerol
  50 #define MAX_EXP LDBL_MAX_EXP
  51 #define MIN_EXP LDBL_MIN_EXP
  52 /* On MIPS IRIX machines, LDBL_MIN_EXP is -1021, but the smallest reliable
  53    exponent for 'long double' is -964.  Similarly, on PowerPC machines,
  54    LDBL_MIN_EXP is -1021, but the smallest reliable exponent for 'long double'
  55    is -968.  For exponents below that, the precision may be truncated to the
  56    precision used for 'double'.  */
  57 #ifdef __sgi
  58 # define MIN_NORMAL_EXP (LDBL_MIN_EXP + 57)
  59 #elif defined __ppc || defined __ppc__ || defined __powerpc || defined __powerpc__
  60 # define MIN_NORMAL_EXP (LDBL_MIN_EXP + 53)
  61 #else
  62 # define MIN_NORMAL_EXP LDBL_MIN_EXP
  63 #endif
  64 #define FREXP frexpl
  65 #define RANDOM randoml
  66 #include "test-frexp.h"
  67
  68 int
  69 main ()
  70 {
  71   DECL_LONG_DOUBLE_ROUNDING
  72
  73   BEGIN_LONG_DOUBLE_ROUNDING ();
  74
  75   test_function ();
  76
  77   return test_exit_status;
  78 }