diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-96')
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/Makefile | 2 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/s_totalorderl.c | 56 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c | 71 |
3 files changed, 128 insertions, 1 deletions
diff --git a/sysdeps/ieee754/ldbl-96/Makefile b/sysdeps/ieee754/ldbl-96/Makefile index bf9676e907..931976d7b1 100644 --- a/sysdeps/ieee754/ldbl-96/Makefile +++ b/sysdeps/ieee754/ldbl-96/Makefile @@ -17,5 +17,5 @@ # <http://www.gnu.org/licenses/>. ifeq ($(subdir),math) -tests += test-iscanonical-ldbl-96 +tests += test-iscanonical-ldbl-96 test-totalorderl-ldbl-96 endif diff --git a/sysdeps/ieee754/ldbl-96/s_totalorderl.c b/sysdeps/ieee754/ldbl-96/s_totalorderl.c new file mode 100644 index 0000000000..4f14bafb44 --- /dev/null +++ b/sysdeps/ieee754/ldbl-96/s_totalorderl.c @@ -0,0 +1,56 @@ +/* Total order operation. 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 <stdint.h> + +int +totalorderl (long double x, long double y) +{ + int16_t expx, expy; + uint32_t hx, hy; + uint32_t lx, ly; + GET_LDOUBLE_WORDS (expx, hx, lx, x); + GET_LDOUBLE_WORDS (expy, hy, ly, y); + if (LDBL_MIN_EXP == -16382) + { + /* M68K variant: for the greatest exponent, the high mantissa + bit is not significant and both values of it are valid, so + set it before comparing. For the Intel variant, only one + value of the high mantissa bit is valid for each exponent, so + this is not necessary. */ + if ((expx & 0x7fff) == 0x7fff) + hx |= 0x80000000; + if ((expy & 0x7fff) == 0x7fff) + hy |= 0x80000000; + } +#ifdef HIGH_ORDER_BIT_IS_SET_FOR_SNAN +# error not implemented +#endif + uint32_t x_sign = expx >> 15; + uint32_t y_sign = expy >> 15; + expx ^= x_sign >> 17; + hx ^= x_sign; + lx ^= x_sign; + expy ^= y_sign >> 17; + hy ^= y_sign; + ly ^= y_sign; + return expx < expy || (expx == expy && (hx < hy || (hx == hy && lx <= ly))); +} diff --git a/sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c b/sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c new file mode 100644 index 0000000000..07fa772414 --- /dev/null +++ b/sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c @@ -0,0 +1,71 @@ +/* Test totalorderl 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> + +static const uint64_t tests[] = + { + 0, 1, 0x4000000000000000ULL, 0x4000000000000001ULL, + 0x7fffffffffffffffULL + }; + +static int +do_test (void) +{ + int result = 0; + + if (LDBL_MIN_EXP == -16382) + for (size_t i = 0; i < sizeof (tests) / sizeof (tests[0]); i++) + { + long double ldx, ldy, ldnx, ldny; + /* Verify that the high bit of the mantissa is ignored for + infinities and NaNs for the M68K variant of this + format. */ + SET_LDOUBLE_WORDS (ldx, 0x7fff, + tests[i] >> 32, tests[i] & 0xffffffffULL); + SET_LDOUBLE_WORDS (ldy, 0x7fff, + (tests[i] >> 32) | 0x80000000, + tests[i] & 0xffffffffULL); + SET_LDOUBLE_WORDS (ldnx, 0xffff, + tests[i] >> 32, tests[i] & 0xffffffffULL); + SET_LDOUBLE_WORDS (ldny, 0xffff, + (tests[i] >> 32) | 0x80000000, + tests[i] & 0xffffffffULL); + bool to1 = totalorderl (ldx, ldy); + bool to2 = totalorderl (ldy, ldx); + bool to3 = totalorderl (ldnx, ldny); + bool to4 = totalorderl (ldny, ldnx); + if (to1 && to2 && to3 && to4) + 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" |