projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 6973fc01 | 1 | /* Compute minimum of two numbers, regarding NaN as missing argument. |
| dff8da6b | 2 | Copyright (C) 1997-2024 Free Software Foundation, Inc. |
| 6973fc01 | 3 | This file is part of the GNU C Library. |
| 6973fc01 UD |
4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
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. | |
| 6973fc01 UD |
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 | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 6973fc01 | 14 | |
| 41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 | 16 | License along with the GNU C Library; if not, see |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| 6973fc01 | 18 | |
| 2ce30701 | 19 | #include <libm-alias-ldouble.h> |
| 6973fc01 UD |
20 | #include <sysdep.h> |
| 21 | ||
| 22 | .text | |
| 23 | ENTRY(__fminl) | |
| 0a2546cd JM |
24 | fldt 16(%esp) // y |
| 25 | fxam | |
| 26 | fnstsw | |
| 27 | fldt 4(%esp) // y : x | |
| 28 | ||
| 29 | andb $0x45, %ah | |
| 30 | cmpb $0x01, %ah | |
| 31 | je 2f // y == NaN | |
| 6973fc01 UD |
32 | |
| 33 | fxam | |
| 34 | fnstsw | |
| 35 | andb $0x45, %ah | |
| 36 | cmpb $0x01, %ah | |
| 0a2546cd | 37 | je 3f // x == NaN |
| 6973fc01 UD |
38 | |
| 39 | fucom %st(1) | |
| 40 | fnstsw | |
| 41 | sahf | |
| 0a2546cd JM |
42 | jc 1f |
| 43 | ||
| 44 | fxch %st(1) | |
| 45 | 1: fstp %st(1) | |
| 46 | ||
| 47 | ret | |
| 6973fc01 | 48 | |
| 0a2546cd JM |
49 | 2: // st(1) is a NaN; st(0) may or may not be. |
| 50 | fxam | |
| 51 | fnstsw | |
| 52 | andb $0x45, %ah | |
| 53 | cmpb $0x01, %ah | |
| 54 | je 4f | |
| 55 | // st(1) is a NaN; st(0) is not. Test if st(1) is signaling. | |
| 56 | testb $0x40, 23(%esp) | |
| 57 | jz 4f | |
| 58 | fstp %st(1) | |
| 59 | ret | |
| 60 | ||
| 61 | 3: // st(0) is a NaN; st(1) is not. Test if st(0) is signaling. | |
| 62 | testb $0x40, 11(%esp) | |
| 63 | jz 4f | |
| 64 | fstp %st(0) | |
| 65 | ret | |
| 6973fc01 | 66 | |
| 0a2546cd JM |
67 | 4: // Both arguments are NaNs, or one is a signaling NaN. |
| 68 | faddp | |
| 6973fc01 UD |
69 | ret |
| 70 | END(__fminl) | |
| 2ce30701 | 71 | libm_alias_ldouble (__fmin, fmin) |