projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 963394a2 | 1 | /* Manipulation of the bit representation of 'long double' quantities. |
| 2b778ceb | 2 | Copyright (C) 2006-2021 Free Software Foundation, Inc. |
| 963394a2 ZW |
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/>. */ |
| 963394a2 ZW |
18 | |
| 19 | #ifndef _MATH_LDBL_H_PPC_ | |
| 20 | #define _MATH_LDBL_H_PPC_ 1 | |
| 5c68d401 | 21 | |
| edf66e57 AZ |
22 | /* GCC does not optimize the default ldbl_pack code to not spill register |
| 23 | in the stack. The following optimization tells gcc that pack/unpack | |
| 24 | is really a nop. We use fr1/fr2 because those are the regs used to | |
| 25 | pass/return a single long double arg. */ | |
| 5c68d401 | 26 | static inline long double |
| edf66e57 | 27 | ldbl_pack_ppc (double a, double aa) |
| 5c68d401 RM |
28 | { |
| 29 | register long double x __asm__ ("fr1"); | |
| 30 | register double xh __asm__ ("fr1"); | |
| 31 | register double xl __asm__ ("fr2"); | |
| 32 | xh = a; | |
| 33 | xl = aa; | |
| 34 | __asm__ ("" : "=f" (x) : "f" (xh), "f" (xl)); | |
| 35 | return x; | |
| 36 | } | |
| 37 | ||
| 38 | static inline void | |
| edf66e57 | 39 | ldbl_unpack_ppc (long double l, double *a, double *aa) |
| 5c68d401 RM |
40 | { |
| 41 | register long double x __asm__ ("fr1"); | |
| 42 | register double xh __asm__ ("fr1"); | |
| 43 | register double xl __asm__ ("fr2"); | |
| 44 | x = l; | |
| 45 | __asm__ ("" : "=f" (xh), "=f" (xl) : "f" (x)); | |
| 46 | *a = xh; | |
| 47 | *aa = xl; | |
| 48 | } | |
| 49 | ||
| edf66e57 AZ |
50 | #define ldbl_pack ldbl_pack_ppc |
| 51 | #define ldbl_unpack ldbl_unpack_ppc | |
| 5c68d401 | 52 | |
| edf66e57 | 53 | #include <sysdeps/ieee754/ldbl-128ibm/math_ldbl.h> |
| 963394a2 ZW |
54 | |
| 55 | #endif /* math_ldbl.h */ |