1 /* Total order operation on absolute values.
2 Copyright (C) 2016-2022 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 <math.h>
20 #include <math_private.h>
21 #include <nan-high-order-bit.h>
22 #include <libm-alias-double.h>
23 #include <stdint.h>
24 #include <shlib-compat.h>
25 #include <first-versions.h>
26
27 int
__totalordermag(const double * x,const double * y)28 __totalordermag (const double *x, const double *y)
29 {
30 uint64_t ix, iy;
31 EXTRACT_WORDS64 (ix, *x);
32 EXTRACT_WORDS64 (iy, *y);
33 ix &= 0x7fffffffffffffffULL;
34 iy &= 0x7fffffffffffffffULL;
35 #if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
36 /* For the preferred quiet NaN convention, this operation is a
37 comparison of the representations of the absolute values of the
38 arguments. If both arguments are NaNs, invert the
39 quiet/signaling bit so comparing that way works. */
40 if (ix > 0x7ff0000000000000ULL && iy > 0x7ff0000000000000ULL)
41 {
42 ix ^= 0x0008000000000000ULL;
43 iy ^= 0x0008000000000000ULL;
44 }
45 #endif
46 return ix <= iy;
47 }
48 #ifdef SHARED
49 # define CONCATX(x, y) x ## y
50 # define CONCAT(x, y) CONCATX (x, y)
51 # define UNIQUE_ALIAS(name) CONCAT (name, __COUNTER__)
52 # define do_symbol(orig_name, name, aliasname) \
53 strong_alias (orig_name, name) \
54 versioned_symbol (libm, name, aliasname, GLIBC_2_31)
55 # undef weak_alias
56 # define weak_alias(name, aliasname) \
57 do_symbol (name, UNIQUE_ALIAS (name), aliasname);
58 #endif
libm_alias_double(__totalordermag,totalordermag)59 libm_alias_double (__totalordermag, totalordermag)
60 #if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31)
61 int
62 attribute_compat_text_section
63 __totalordermag_compat (double x, double y)
64 {
65 return __totalordermag (&x, &y);
66 }
67 #undef do_symbol
68 #define do_symbol(orig_name, name, aliasname) \
69 strong_alias (orig_name, name) \
70 compat_symbol (libm, name, aliasname, \
71 CONCAT (FIRST_VERSION_libm_, aliasname))
72 libm_alias_double (__totalordermag_compat, totalordermag)
73 #endif
74