projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 19f1dd5f | 1 | /* CPU strand yielding for busy loops. |
| bfff8b1b | 2 | Copyright (C) 2012-2017 Free Software Foundation, Inc. |
| 19f1dd5f DM |
3 | Contributed by David S. Miller (davem@davemloft.net) |
| 4 | This file is part of the GNU C Library. | |
| 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 | |
| 17 | License along with the GNU C Library; if not, see | |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 19 | ||
| 20 | #include <sysdep.h> | |
| 21 | ||
| 22 | .text | |
| 23 | __cpu_relax_generic: | |
| 24 | rd %ccr, %g0 | |
| 25 | rd %ccr, %g0 | |
| 26 | rd %ccr, %g0 | |
| 27 | retl | |
| 28 | nop | |
| 29 | .size __cpu_relax_generic,.-__cpu_relax_generic | |
| 30 | ||
| 31 | __cpu_relax_pause: | |
| 32 | wr %g0, 128, %asr27 | |
| 33 | retl | |
| 34 | nop | |
| 35 | .size __cpu_relax_pause,.-__cpu_relax_pause | |
| 36 | ||
| 37 | ENTRY(__cpu_relax) | |
| 38 | .type __cpu_relax, @gnu_indirect_function | |
| 39 | # ifdef SHARED | |
| 40 | SETUP_PIC_REG_LEAF(o3, o5) | |
| 41 | # endif | |
| 42 | set HWCAP_SPARC_PAUSE, %o1 | |
| 43 | andcc %o0, %o1, %g0 | |
| 44 | be 1f | |
| 45 | nop | |
| 46 | # ifdef SHARED | |
| 47 | sethi %gdop_hix22(__cpu_relax_pause), %o1 | |
| 48 | xor %o1, %gdop_lox10(__cpu_relax_pause), %o1 | |
| 49 | # else | |
| 50 | set __cpu_relax_pause, %o1 | |
| 51 | # endif | |
| 52 | ba 10f | |
| 53 | nop | |
| 54 | 1: | |
| 55 | # ifdef SHARED | |
| 56 | sethi %gdop_hix22(__cpu_relax_generic), %o1 | |
| 57 | xor %o1, %gdop_lox10(__cpu_relax_generic), %o1 | |
| 58 | # else | |
| 59 | set __cpu_relax_generic, %o1 | |
| 60 | # endif | |
| 61 | 10: | |
| 62 | # ifdef SHARED | |
| 63 | add %o3, %o1, %o1 | |
| 64 | # endif | |
| 65 | retl | |
| 66 | mov %o1, %o0 | |
| 67 | END(__cpu_relax) |