1/* Total order operation. flt-32 version.
2 Copyright (C) 2016-2021 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 <libm-alias-float.h>
22#include <nan-high-order-bit.h>
23#include <stdint.h>
24#include <shlib-compat.h>
25#include <first-versions.h>
26
27int
28__totalorderf (const float *x, const float *y)
29{
30 int32_t ix, iy;
31 GET_FLOAT_WORD (ix, *x);
32 GET_FLOAT_WORD (iy, *y);
33#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
34 /* For the preferred quiet NaN convention, this operation is a
35 comparison of the representations of the arguments interpreted as
36 sign-magnitude integers. If both arguments are NaNs, invert the
37 quiet/signaling bit so comparing that way works. */
38 if ((ix & 0x7fffffff) > 0x7f800000 && (iy & 0x7fffffff) > 0x7f800000)
39 {
40 ix ^= 0x00400000;
41 iy ^= 0x00400000;
42 }
43#endif
44 uint32_t ix_sign = ix >> 31;
45 uint32_t iy_sign = iy >> 31;
46 ix ^= ix_sign >> 1;
47 iy ^= iy_sign >> 1;
48 return ix <= iy;
49}
50#ifdef SHARED
51# define CONCATX(x, y) x ## y
52# define CONCAT(x, y) CONCATX (x, y)
53# define UNIQUE_ALIAS(name) CONCAT (name, __COUNTER__)
54# define do_symbol(orig_name, name, aliasname) \
55 strong_alias (orig_name, name) \
56 versioned_symbol (libm, name, aliasname, GLIBC_2_31)
57# undef weak_alias
58# define weak_alias(name, aliasname) \
59 do_symbol (name, UNIQUE_ALIAS (name), aliasname);
60#endif
61libm_alias_float (__totalorder, totalorder)
62#if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31)
63int
64attribute_compat_text_section
65__totalorder_compatf (float x, float y)
66{
67 return __totalorderf (&x, &y);
68}
69#undef do_symbol
70#define do_symbol(orig_name, name, aliasname) \
71 strong_alias (orig_name, name) \
72 compat_symbol (libm, name, aliasname, \
73 CONCAT (FIRST_VERSION_libm_, aliasname))
74libm_alias_float (__totalorder_compat, totalorder)
75#endif
76