1/* Total order operation on absolute values. ldbl-96 version.
2 Copyright (C) 2016-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <float.h>
20#include <math.h>
21#include <math_private.h>
22#include <libm-alias-ldouble.h>
23#include <nan-high-order-bit.h>
24#include <stdint.h>
25#include <shlib-compat.h>
26#include <first-versions.h>
27
28int
29__totalordermagl (const long double *x, const long double *y)
30{
31 uint16_t expx, expy;
32 uint32_t hx, hy;
33 uint32_t lx, ly;
34 GET_LDOUBLE_WORDS (expx, hx, lx, *x);
35 GET_LDOUBLE_WORDS (expy, hy, ly, *y);
36 expx &= 0x7fff;
37 expy &= 0x7fff;
38 if (LDBL_MIN_EXP == -16382)
39 {
40 /* M68K variant: for the greatest exponent, the high mantissa
41 bit is not significant and both values of it are valid, so
42 set it before comparing. For the Intel variant, only one
43 value of the high mantissa bit is valid for each exponent, so
44 this is not necessary. */
45 if (expx == 0x7fff)
46 hx |= 0x80000000;
47 if (expy == 0x7fff)
48 hy |= 0x80000000;
49 }
50#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
51# error not implemented
52#endif
53 return expx < expy || (expx == expy && (hx < hy || (hx == hy && lx <= ly)));
54}
55#ifdef SHARED
56# define CONCATX(x, y) x ## y
57# define CONCAT(x, y) CONCATX (x, y)
58# define UNIQUE_ALIAS(name) CONCAT (name, __COUNTER__)
59# define do_symbol(orig_name, name, aliasname) \
60 strong_alias (orig_name, name) \
61 versioned_symbol (libm, name, aliasname, GLIBC_2_31)
62# undef weak_alias
63# define weak_alias(name, aliasname) \
64 do_symbol (name, UNIQUE_ALIAS (name), aliasname);
65#endif
66libm_alias_ldouble (__totalordermag, totalordermag)
67#if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31)
68int
69attribute_compat_text_section
70__totalordermag_compatl (long double x, long double y)
71{
72 return __totalordermagl (&x, &y);
73}
74#undef do_symbol
75#define do_symbol(orig_name, name, aliasname) \
76 strong_alias (orig_name, name) \
77 compat_symbol (libm, name, aliasname, \
78 CONCAT (FIRST_VERSION_libm_, aliasname))
79libm_alias_ldouble (__totalordermag_compat, totalordermag)
80#endif
81