diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-96')
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/Makefile | 21 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/bits/iscanonical.h | 35 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/s_iscanonicall.c | 43 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/test-iscanonical-ldbl-96.c | 114 |
4 files changed, 213 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-96/Makefile b/sysdeps/ieee754/ldbl-96/Makefile new file mode 100644 index 0000000000..bf9676e907 --- /dev/null +++ b/sysdeps/ieee754/ldbl-96/Makefile @@ -0,0 +1,21 @@ +# Makefile for sysdeps/ieee754/ldbl-96. +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. + +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. + +# The GNU C Library 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 +# Lesser General Public License for more details. + +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +ifeq ($(subdir),math) +tests += test-iscanonical-ldbl-96 +endif diff --git a/sysdeps/ieee754/ldbl-96/bits/iscanonical.h b/sysdeps/ieee754/ldbl-96/bits/iscanonical.h new file mode 100644 index 0000000000..af0c72cc7f --- /dev/null +++ b/sysdeps/ieee754/ldbl-96/bits/iscanonical.h @@ -0,0 +1,35 @@ +/* Define iscanonical macro. ldbl-96 version. + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _MATH_H +# error "Never use <bits/iscanonical.h> directly; include <math.h> instead." +#endif + +extern int __iscanonicall (long double __x) + __THROW __attribute__ ((__const__)); + +/* Return nonzero value if X is canonical. In IEEE interchange binary + formats, all values are canonical, but the argument must still be + converted to its semantic type for any exceptions arising from the + conversion, before being discarded; in extended precision, there + are encodings that are not consistently handled as corresponding to + any particular value of the type, and we return 0 for those. */ +#define iscanonical(x) \ + (sizeof (x) == sizeof (long double) \ + ? __iscanonicall (x) \ + : ((void) (__typeof (x)) (x), 1)) diff --git a/sysdeps/ieee754/ldbl-96/s_iscanonicall.c b/sysdeps/ieee754/ldbl-96/s_iscanonicall.c new file mode 100644 index 0000000000..f820030dc0 --- /dev/null +++ b/sysdeps/ieee754/ldbl-96/s_iscanonicall.c @@ -0,0 +1,43 @@ +/* Test whether long double value is canonical. ldbl-96 version. + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <float.h> +#include <math.h> +#include <math_private.h> +#include <stdbool.h> +#include <stdint.h> + +int +__iscanonicall (long double x) +{ + uint32_t se, i0, i1 __attribute__ ((unused)); + + GET_LDOUBLE_WORDS (se, i0, i1, x); + int32_t ix = se & 0x7fff; + bool mant_high = (i0 & 0x80000000) != 0; + + if (LDBL_MIN_EXP == -16381) + /* Intel variant: the high mantissa bit should have a value + determined by the exponent. */ + return ix > 0 ? mant_high : !mant_high; + else + /* M68K variant: both values of the high bit are valid for the + greatest and smallest exponents, while other exponents require + the high bit to be set. */ + return ix == 0 || ix == 0x7fff || mant_high; +} diff --git a/sysdeps/ieee754/ldbl-96/test-iscanonical-ldbl-96.c b/sysdeps/ieee754/ldbl-96/test-iscanonical-ldbl-96.c new file mode 100644 index 0000000000..6827aa8108 --- /dev/null +++ b/sysdeps/ieee754/ldbl-96/test-iscanonical-ldbl-96.c @@ -0,0 +1,114 @@ +/* Test iscanonical for ldbl-96. + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <float.h> +#include <math.h> +#include <math_private.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> + +struct test +{ + bool sign; + uint16_t exponent; + bool high; + uint64_t mantissa; + bool canonical; +}; + +#define M68K_VARIANT (LDBL_MIN_EXP == -16382) + +static const struct test tests[] = + { + { false, 0, true, 0, M68K_VARIANT }, + { true, 0, true, 0, M68K_VARIANT }, + { false, 0, true, 1, M68K_VARIANT }, + { true, 0, true, 1, M68K_VARIANT }, + { false, 0, true, 0x100000000ULL, M68K_VARIANT }, + { true, 0, true, 0x100000000ULL, M68K_VARIANT }, + { false, 0, false, 0, true }, + { true, 0, false, 0, true }, + { false, 0, false, 1, true }, + { true, 0, false, 1, true }, + { false, 0, false, 0x100000000ULL, true }, + { true, 0, false, 0x100000000ULL, true }, + { false, 1, true, 0, true }, + { true, 1, true, 0, true }, + { false, 1, true, 1, true }, + { true, 1, true, 1, true }, + { false, 1, true, 0x100000000ULL, true }, + { true, 1, true, 0x100000000ULL, true }, + { false, 1, false, 0, false }, + { true, 1, false, 0, false }, + { false, 1, false, 1, false }, + { true, 1, false, 1, false }, + { false, 1, false, 0x100000000ULL, false }, + { true, 1, false, 0x100000000ULL, false }, + { false, 0x7ffe, true, 0, true }, + { true, 0x7ffe, true, 0, true }, + { false, 0x7ffe, true, 1, true }, + { true, 0x7ffe, true, 1, true }, + { false, 0x7ffe, true, 0x100000000ULL, true }, + { true, 0x7ffe, true, 0x100000000ULL, true }, + { false, 0x7ffe, false, 0, false }, + { true, 0x7ffe, false, 0, false }, + { false, 0x7ffe, false, 1, false }, + { true, 0x7ffe, false, 1, false }, + { false, 0x7ffe, false, 0x100000000ULL, false }, + { true, 0x7ffe, false, 0x100000000ULL, false }, + { false, 0x7fff, true, 0, true }, + { true, 0x7fff, true, 0, true }, + { false, 0x7fff, true, 1, true }, + { true, 0x7fff, true, 1, true }, + { false, 0x7fff, true, 0x100000000ULL, true }, + { true, 0x7fff, true, 0x100000000ULL, true }, + { false, 0x7fff, false, 0, M68K_VARIANT }, + { true, 0x7fff, false, 0, M68K_VARIANT }, + { false, 0x7fff, false, 1, M68K_VARIANT }, + { true, 0x7fff, false, 1, M68K_VARIANT }, + { false, 0x7fff, false, 0x100000000ULL, M68K_VARIANT }, + { true, 0x7fff, false, 0x100000000ULL, M68K_VARIANT }, + }; + +static int +do_test (void) +{ + int result = 0; + + for (size_t i = 0; i < sizeof (tests) / sizeof (tests[0]); i++) + { + long double ld; + SET_LDOUBLE_WORDS (ld, tests[i].exponent | (tests[i].sign << 15), + (tests[i].mantissa >> 32) | (tests[i].high << 31), + tests[i].mantissa & 0xffffffffULL); + bool canonical = iscanonical (ld); + if (canonical == tests[i].canonical) + printf ("PASS: test %zu\n", i); + else + { + printf ("FAIL: test %zu\n", i); + result = 1; + } + } + + return result; +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |