projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5e9d98a3 | 1 | /* Total order operation. ldbl-96 version. |
| d614a753 | 2 | Copyright (C) 2016-2020 Free Software Foundation, Inc. |
| 5e9d98a3 JM |
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 | |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| 5e9d98a3 JM |
18 | |
| 19 | #include <float.h> | |
| 20 | #include <math.h> | |
| 21 | #include <math_private.h> | |
| 86f9568a | 22 | #include <libm-alias-ldouble.h> |
| 6f322a89 | 23 | #include <nan-high-order-bit.h> |
| 5e9d98a3 | 24 | #include <stdint.h> |
| 42760d76 JM |
25 | #include <shlib-compat.h> |
| 26 | #include <first-versions.h> | |
| 5e9d98a3 JM |
27 | |
| 28 | int | |
| 42760d76 | 29 | __totalorderl (const long double *x, const long double *y) |
| 5e9d98a3 JM |
30 | { |
| 31 | int16_t expx, expy; | |
| 32 | uint32_t hx, hy; | |
| 33 | uint32_t lx, ly; | |
| 42760d76 JM |
34 | GET_LDOUBLE_WORDS (expx, hx, lx, *x); |
| 35 | GET_LDOUBLE_WORDS (expy, hy, ly, *y); | |
| 5e9d98a3 JM |
36 | if (LDBL_MIN_EXP == -16382) |
| 37 | { | |
| 38 | /* M68K variant: for the greatest exponent, the high mantissa | |
| 39 | bit is not significant and both values of it are valid, so | |
| 40 | set it before comparing. For the Intel variant, only one | |
| 41 | value of the high mantissa bit is valid for each exponent, so | |
| 42 | this is not necessary. */ | |
| 43 | if ((expx & 0x7fff) == 0x7fff) | |
| 44 | hx |= 0x80000000; | |
| 45 | if ((expy & 0x7fff) == 0x7fff) | |
| 46 | hy |= 0x80000000; | |
| 47 | } | |
| 6f322a89 | 48 | #if HIGH_ORDER_BIT_IS_SET_FOR_SNAN |
| 5e9d98a3 JM |
49 | # error not implemented |
| 50 | #endif | |
| 51 | uint32_t x_sign = expx >> 15; | |
| 52 | uint32_t y_sign = expy >> 15; | |
| 53 | expx ^= x_sign >> 17; | |
| 54 | hx ^= x_sign; | |
| 55 | lx ^= x_sign; | |
| 56 | expy ^= y_sign >> 17; | |
| 57 | hy ^= y_sign; | |
| 58 | ly ^= y_sign; | |
| 59 | return expx < expy || (expx == expy && (hx < hy || (hx == hy && lx <= ly))); | |
| 60 | } | |
| 42760d76 JM |
61 | #ifdef SHARED |
| 62 | # define CONCATX(x, y) x ## y | |
| 63 | # define CONCAT(x, y) CONCATX (x, y) | |
| 64 | # define UNIQUE_ALIAS(name) CONCAT (name, __COUNTER__) | |
| 65 | # define do_symbol(orig_name, name, aliasname) \ | |
| 66 | strong_alias (orig_name, name) \ | |
| 67 | versioned_symbol (libm, name, aliasname, GLIBC_2_31) | |
| 68 | # undef weak_alias | |
| 69 | # define weak_alias(name, aliasname) \ | |
| 70 | do_symbol (name, UNIQUE_ALIAS (name), aliasname); | |
| 71 | #endif | |
| 86f9568a | 72 | libm_alias_ldouble (__totalorder, totalorder) |
| 42760d76 JM |
73 | #if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31) |
| 74 | int | |
| 75 | attribute_compat_text_section | |
| 76 | __totalorder_compatl (long double x, long double y) | |
| 77 | { | |
| 78 | return __totalorderl (&x, &y); | |
| 79 | } | |
| 80 | #undef do_symbol | |
| 81 | #define do_symbol(orig_name, name, aliasname) \ | |
| 82 | strong_alias (orig_name, name) \ | |
| 83 | compat_symbol (libm, name, aliasname, \ | |
| 84 | CONCAT (FIRST_VERSION_libm_, aliasname)) | |
| 85 | libm_alias_ldouble (__totalorder_compat, totalorder) | |
| 86 | #endif |