projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 9359218f | 1 | /* Compute minimum of two numbers, regarding NaN as missing argument. |
| 04277e02 | 2 | Copyright (C) 1997-2019 Free Software Foundation, Inc. |
| 9359218f AJ |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 9359218f AJ |
19 | |
| 20 | #include <sysdep.h> | |
| f58e5f48 | 21 | #include <libm-alias-ldouble.h> |
| 9359218f AJ |
22 | |
| 23 | .text | |
| 24 | ENTRY(__fminl) | |
| 25 | fldt 8(%rsp) // x | |
| 26 | fldt 24(%rsp) // x : y | |
| 27 | ||
| 9359218f | 28 | fucomi %st(1), %st |
| 0a2546cd | 29 | jp 2f |
| 9359218f AJ |
30 | fcmovnb %st(1), %st |
| 31 | ||
| 32 | fstp %st(1) | |
| 33 | ||
| 34 | ret | |
| 0a2546cd JM |
35 | |
| 36 | 2: // Unordered. | |
| 37 | fucomi %st(0), %st | |
| 38 | jp 3f | |
| 39 | // st(1) is a NaN; st(0) is not. Test if st(1) is signaling. | |
| 40 | testb $0x40, 15(%rsp) | |
| 41 | jz 4f | |
| 42 | fstp %st(1) | |
| 43 | ret | |
| 44 | ||
| 45 | 3: // st(0) is a NaN; st(1) may or may not be. | |
| 46 | fxch | |
| 47 | fucomi %st(0), %st | |
| 48 | jp 4f | |
| 49 | // st(1) is a NaN; st(0) is not. Test if st(1) is signaling. | |
| 50 | testb $0x40, 31(%rsp) | |
| 51 | jz 4f | |
| 52 | fstp %st(1) | |
| 53 | ret | |
| 54 | ||
| 55 | 4: // Both arguments are NaNs, or one is a signaling NaN. | |
| 56 | faddp | |
| 57 | ret | |
| 9359218f | 58 | END(__fminl) |
| f58e5f48 | 59 | libm_alias_ldouble (__fmin, fmin) |