| /* Total order operation. ldbl-96 version. |
| Copyright (C) 2016-2018 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 <libm-alias-ldouble.h> |
| #include <nan-high-order-bit.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; |
| } |
| #if 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))); |
| } |
| libm_alias_ldouble (__totalorder, totalorder) |