From 793bb37ef01aa58685123a4c5d5851d91fb23a10 Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Fri, 6 Apr 2007 20:57:56 +0000 Subject: [PATCH] Tests for module 'signbit'. --- ChangeLog | 3 + modules/signbit-tests | 17 ++++++ tests/test-signbit.c | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 173 insertions(+) create mode 100644 modules/signbit-tests create mode 100644 tests/test-signbit.c diff --git a/ChangeLog b/ChangeLog index 9fe37697c..8973068d5 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,8 @@ 2007-04-06 Bruno Haible + * modules/signbit-tests: New file. + * tests/test-signbit.c: New file. + * modules/signbit: New file. * lib/signbitf.c: New file. * lib/signbitd.c: New file. diff --git a/modules/signbit-tests b/modules/signbit-tests new file mode 100644 index 000000000..e0ee2bdf1 --- /dev/null +++ b/modules/signbit-tests @@ -0,0 +1,17 @@ +Files: +tests/test-signbit.c +m4/isnanf.m4 +m4/isnan.m4 +m4/isnanl.m4 + +Depends-on: + +configure.ac: +AC_REQUIRE([gl_FLOAT_EXPONENT_LOCATION]) +AC_REQUIRE([gl_DOUBLE_EXPONENT_LOCATION]) +AC_REQUIRE([gl_LONG_DOUBLE_EXPONENT_LOCATION]) + +Makefile.am: +TESTS += test-signbit +check_PROGRAMS += test-signbit + diff --git a/tests/test-signbit.c b/tests/test-signbit.c new file mode 100644 index 000000000..3a87c6489 --- /dev/null +++ b/tests/test-signbit.c @@ -0,0 +1,153 @@ +/* Test of signbit() substitute. + Copyright (C) 2007 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* Written by Bruno Haible , 2007. */ + +#include + +#include + +#include +#include + +#define ASSERT(expr) if (!(expr)) abort (); + +float zerof = 0.0f; +double zerod = 0.0; +long double zerol = 0.0L; + +static void +test_signbitf () +{ + /* Finite values. */ + ASSERT (!signbit (3.141f)); + ASSERT (!signbit (3.141e30f)); + ASSERT (!signbit (3.141e-30f)); + ASSERT (signbit (-2.718f)); + ASSERT (signbit (-2.718e30f)); + ASSERT (signbit (-2.718e-30f)); + /* Infinite values. */ + ASSERT (!signbit (1.0f / 0.0f)); + ASSERT (signbit (-1.0f / 0.0f)); + /* Quiet NaN. */ + (void) signbit (zerof / zerof); +#if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT + /* Signalling NaN. */ + { + #define NWORDS \ + ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int)) + typedef union { float value; unsigned int word[NWORDS]; } memory_float; + memory_float m; + m.value = zerof / zerof; +# if FLT_EXPBIT0_BIT > 0 + m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1); +# else + m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)] + ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1); +# endif + if (FLT_EXPBIT0_WORD < NWORDS / 2) + m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT; + else + m.word[0] |= (unsigned int) 1; + (void) signbit (m.value); + #undef NWORDS + } +#endif +} + +static void +test_signbitd () +{ + /* Finite values. */ + ASSERT (!signbit (3.141)); + ASSERT (!signbit (3.141e30)); + ASSERT (!signbit (3.141e-30)); + ASSERT (signbit (-2.718)); + ASSERT (signbit (-2.718e30)); + ASSERT (signbit (-2.718e-30)); + /* Infinite values. */ + ASSERT (!signbit (1.0 / 0.0)); + ASSERT (signbit (-1.0 / 0.0)); + /* Quiet NaN. */ + (void) signbit (zerod / zerod); +#if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT + /* Signalling NaN. */ + { + #define NWORDS \ + ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)) + typedef union { double value; unsigned int word[NWORDS]; } memory_double; + memory_double m; + m.value = zerod / zerod; +# if DBL_EXPBIT0_BIT > 0 + m.word[DBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (DBL_EXPBIT0_BIT - 1); +# else + m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)] + ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1); +# endif + m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)] + |= (unsigned int) 1 << DBL_EXPBIT0_BIT; + (void) signbit (m.value); + #undef NWORDS + } +#endif +} + +static void +test_signbitl () +{ + /* Finite values. */ + ASSERT (!signbit (3.141L)); + ASSERT (!signbit (3.141e30L)); + ASSERT (!signbit (3.141e-30L)); + ASSERT (signbit (-2.718L)); + ASSERT (signbit (-2.718e30L)); + ASSERT (signbit (-2.718e-30L)); + /* Infinite values. */ + ASSERT (!signbit (1.0L / 0.0L)); + ASSERT (signbit (-1.0L / 0.0L)); + /* Quiet NaN. */ + (void) signbit (zerol / zerol); +#if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT + /* Signalling NaN. */ + { + #define NWORDS \ + ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)) + typedef union { long double value; unsigned int word[NWORDS]; } memory_long_double; + memory_long_double m; + m.value = zerol / zerol; +# if LDBL_EXPBIT0_BIT > 0 + m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1); +# else + m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)] + ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1); +# endif + m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)] + |= (unsigned int) 1 << LDBL_EXPBIT0_BIT; + (void) signbit (m.value); + #undef NWORDS + } +#endif +} + +int +main () +{ + test_signbitf (); + test_signbitd (); + test_signbitl (); + return 0; +} -- 2.11.0