Fix formatting of denormal IBM long double numbers
This commit is contained in:
Andreas Schwab
parent
6d5c57fabd
commit
7e0d315da8
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@ -1,5 +1,12 @@
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2012-04-28 Andreas Schwab <schwab@linux-m68k.org>
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[BZ #13941]
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* sysdeps/ieee754/ldbl-128ibm/ldbl2mpn.c
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(__mpn_extract_long_double): Use DBL_MIN_EXP instead of
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LDBL_MIN_EXP.
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* stdio-common/Makefile (tests): Add tst-sprintf3.
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* stdio-common/tst-sprintf3.c: New file.
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* elf/Makefile ($(objpfx)tst-leaks1-mem, $(objpfx)noload-mem)
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($(objpfx)tst-unused-dep.out): Don't run when cross-compiling.
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18
NEWS
18
NEWS
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@ -13,15 +13,15 @@ Version 2.16
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2554, 2562, 2563, 2565, 2566, 2576, 2636, 2678, 3335, 3768, 3866, 3868,
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3976, 3992, 4026, 4108, 4596, 4822, 5077, 5461, 5805, 5993, 6471, 6486,
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6578, 6649, 6730, 6770, 6794, 6884, 6890, 6894, 6895, 6907, 6911, 7064,
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9739, 9902, 10110, 10135, 10140, 10153, 10210, 10254, 10346, 10545,
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10716, 11174, 11322, 11365, 11451, 11494, 11521, 11959, 12047, 12340,
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13058, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532, 13533,
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13547, 13551, 13552, 13553, 13555, 13559, 13566, 13583, 13592, 13618,
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13637, 13656, 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13726,
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13738, 13739, 13760, 13761, 13786, 13792, 13806, 13824, 13840, 13841,
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13844, 13846, 13851, 13852, 13854, 13871, 13872, 13873, 13879, 13883,
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13886, 13892, 13895, 13908, 13910, 13911, 13912, 13913, 13915, 13916,
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13917, 13918, 13919, 13920, 13921, 13926, 13927, 13928, 13938, 13963,
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9739, 9902, 10110, 10135, 10140, 10153, 10210, 10254, 10346, 10545, 10716,
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11174, 11322, 11365, 11451, 11494, 11521, 11959, 12047, 12340, 13058,
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13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532, 13533, 13547,
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13551, 13552, 13553, 13555, 13559, 13566, 13583, 13592, 13618, 13637,
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13656, 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13726, 13738,
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13739, 13760, 13761, 13786, 13792, 13806, 13824, 13840, 13841, 13844,
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13846, 13851, 13852, 13854, 13871, 13872, 13873, 13879, 13883, 13886,
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13892, 13895, 13908, 13910, 13911, 13912, 13913, 13915, 13916, 13917,
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13918, 13919, 13920, 13921, 13926, 13927, 13928, 13938, 13941, 13963,
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13967, 13970, 13973, 14027
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* ISO C11 support:
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@ -56,7 +56,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
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tst-fwrite bug16 bug17 tst-swscanf tst-sprintf2 bug18 bug18a \
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bug19 bug19a tst-popen2 scanf13 scanf14 scanf15 bug20 bug21 bug22 \
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scanf16 scanf17 tst-setvbuf1 tst-grouping bug23 bug24 \
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bug-vfprintf-nargs tst-long-dbl-fphex tst-fphex-wide
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bug-vfprintf-nargs tst-long-dbl-fphex tst-fphex-wide tst-sprintf3
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test-srcs = tst-unbputc tst-printf
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90
stdio-common/tst-sprintf3.c
Normal file
90
stdio-common/tst-sprintf3.c
Normal file
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@ -0,0 +1,90 @@
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/* Copyright (C) 2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* Test bug #13941. */
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#include <float.h>
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#include <math.h>
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#include <stdio.h>
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#include <string.h>
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int
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main (void)
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{
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#if LDBL_MANT_DIG >= 106
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volatile union { long double l; long long x[2]; } u, v;
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char buf[64];
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#endif
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int result = 0;
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#if LDBL_MANT_DIG == 106 || LDBL_MANT_DIG == 113
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# define COMPARE_LDBL(u, v) \
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((u).l == (v).l && (u).x[0] == (v).x[0] && (u).x[1] == (v).x[1])
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#else
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# define COMPARE_LDBL(u, v) ((u).l == (v).l)
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#endif
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#define TEST(val) \
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do \
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{ \
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u.l = (val); \
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snprintf (buf, sizeof buf, "%.30LgL", u.l); \
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if (strcmp (buf, #val) != 0) \
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{ \
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printf ("Error on line %d: %s != %s\n", __LINE__, buf, #val); \
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result = 1; \
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} \
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if (sscanf (#val, "%Lg", &v.l) != 1 || !COMPARE_LDBL (u, v)) \
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{ \
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printf ("Error sscanf on line %d: %.30Lg != %.30Lg\n", __LINE__, \
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u.l, v.l); \
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result = 1; \
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} \
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/* printf ("%s %Lg %016Lx %016Lx\n", #val, u.l, u.x[0], u.x[1]); */ \
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} \
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while (0)
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#if LDBL_MANT_DIG >= 106
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# if LDBL_MANT_DIG == 106
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TEST (2.22507385850719347803989925739e-308L);
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TEST (2.22507385850719397210554509863e-308L);
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TEST (2.22507385850720088902458687609e-308L);
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# endif
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TEST (2.22507385850720138309023271733e-308L);
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TEST (2.22507385850720187715587855858e-308L);
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TEST (2.2250738585074419930597574044e-308L);
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TEST (4.45014771701440227211481959342e-308L);
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TEST (4.45014771701440276618046543466e-308L);
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TEST (4.45014771701440375431175711716e-308L);
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TEST (4.45014771701440474244304879965e-308L);
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TEST (7.12023634722304600689881138745e-307L);
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TEST (1.13923781555569064960474854133e-305L);
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TEST (1.13777777777777776389998996996L);
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TEST (1.13777777777777765287768750745L);
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TEST (20988295479420645138.2044444444L);
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TEST (20988295479420643090.2044444444L);
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TEST (2.14668699894294423266045294316e-292L);
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# if LDBL_MANT_DIG == 106
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TEST (-2.35993711055432139266626434123e-292L);
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TEST (6.26323524637968345414769634658e-302L);
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TEST (1.49327164802066885331814201989e-308L);
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TEST (3.71834550652787023640837473722e-308L);
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TEST (9.51896449671134907001349268087e-306L);
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# endif
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#endif
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return result;
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}
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@ -1,5 +1,4 @@
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/* Copyright (C) 1995,1996,1997,1998,1999,2002,2003,2006
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Free Software Foundation, Inc.
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/* Copyright (C) 1995-2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -104,7 +103,10 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
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else
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{
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/* It is a denormal number, meaning it has no implicit leading
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one bit, and its exponent is in fact the format minimum. */
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one bit, and its exponent is in fact the format minimum. We
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use DBL_MIN_EXP instead of LDBL_MIN_EXP below because the
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latter describes the properties of both parts together, but
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the exponent is computed from the high part only. */
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int cnt;
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#if N == 2
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@ -115,7 +117,7 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
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res_ptr[N - 1] = res_ptr[N - 1] << cnt
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| (res_ptr[0] >> (BITS_PER_MP_LIMB - cnt));
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res_ptr[0] <<= cnt;
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*expt = LDBL_MIN_EXP - 1 - cnt;
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*expt = DBL_MIN_EXP - 1 - cnt;
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}
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else
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{
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@ -130,7 +132,7 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
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res_ptr[N - 1] = res_ptr[0] >> (NUM_LEADING_ZEROS - cnt);
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res_ptr[0] <<= BITS_PER_MP_LIMB - (NUM_LEADING_ZEROS - cnt);
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}
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*expt = LDBL_MIN_EXP - 1
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*expt = DBL_MIN_EXP - 1
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- (BITS_PER_MP_LIMB - NUM_LEADING_ZEROS) - cnt;
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}
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#else
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@ -161,7 +163,7 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
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for (; k >= 0; k--)
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res_ptr[k] = 0;
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*expt = LDBL_MIN_EXP - 1 - l * BITS_PER_MP_LIMB - cnt;
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*expt = DBL_MIN_EXP - 1 - l * BITS_PER_MP_LIMB - cnt;
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#endif
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}
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}
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