| /* |
| Copyright 2005-2010 Intel Corporation. All Rights Reserved. |
| |
| This file is part of Threading Building Blocks. |
| |
| Threading Building Blocks is free software; you can redistribute it |
| and/or modify it under the terms of the GNU General Public License |
| version 2 as published by the Free Software Foundation. |
| |
| Threading Building Blocks 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with Threading Building Blocks; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| As a special exception, you may use this file as part of a free software |
| library without restriction. Specifically, if other files instantiate |
| templates or use macros or inline functions from this file, or you compile |
| this file and link it with other files to produce an executable, this |
| file does not by itself cause the resulting executable to be covered by |
| the GNU General Public License. This exception does not however |
| invalidate any other reasons why the executable file might be covered by |
| the GNU General Public License. |
| */ |
| |
| #ifndef __TBB_machine_H |
| #error Do not include this file directly; include tbb_machine.h instead |
| #endif |
| |
| #include <stdint.h> |
| #include <unistd.h> |
| |
| #include <sched.h> // sched_yield |
| |
| inline int32_t __TBB_machine_cmpswp4 (volatile void *ptr, int32_t value, int32_t comparand ) |
| { |
| int32_t result; |
| |
| __asm__ __volatile__("sync\n" |
| "0: lwarx %0,0,%2\n\t" /* load w/ reservation */ |
| "cmpw %0,%4\n\t" /* compare against comparand */ |
| "bne- 1f\n\t" /* exit if not same */ |
| "stwcx. %3,0,%2\n\t" /* store new_value */ |
| "bne- 0b\n" /* retry if reservation lost */ |
| "1: sync" /* the exit */ |
| : "=&r"(result), "=m"(* (int32_t*) ptr) |
| : "r"(ptr), "r"(value), "r"(comparand), "m"(* (int32_t*) ptr) |
| : "cr0"); |
| return result; |
| } |
| |
| inline int64_t __TBB_machine_cmpswp8 (volatile void *ptr, int64_t value, int64_t comparand ) |
| { |
| int64_t result; |
| __asm__ __volatile__("sync\n" |
| "0: ldarx %0,0,%2\n\t" /* load w/ reservation */ |
| "cmpd %0,%4\n\t" /* compare against comparand */ |
| "bne- 1f\n\t" /* exit if not same */ |
| "stdcx. %3,0,%2\n\t" /* store new_value */ |
| "bne- 0b\n" /* retry if reservation lost */ |
| "1: sync" /* the exit */ |
| : "=&b"(result), "=m"(* (int64_t*) ptr) |
| : "r"(ptr), "r"(value), "r"(comparand), "m"(* (int64_t*) ptr) |
| : "cr0"); |
| return result; |
| } |
| |
| #define __TBB_BIG_ENDIAN 1 |
| |
| #if defined(powerpc64) || defined(__powerpc64__) || defined(__ppc64__) |
| #define __TBB_WORDSIZE 8 |
| #define __TBB_CompareAndSwapW(P,V,C) __TBB_machine_cmpswp8(P,V,C) |
| #else |
| #define __TBB_WORDSIZE 4 |
| #define __TBB_CompareAndSwapW(P,V,C) __TBB_machine_cmpswp4(P,V,C) |
| #endif |
| |
| #define __TBB_CompareAndSwap4(P,V,C) __TBB_machine_cmpswp4(P,V,C) |
| #define __TBB_CompareAndSwap8(P,V,C) __TBB_machine_cmpswp8(P,V,C) |
| #define __TBB_Yield() sched_yield() |
| #define __TBB_rel_acq_fence() __asm__ __volatile__("lwsync": : :"memory") |
| #define __TBB_release_consistency_helper() __TBB_rel_acq_fence() |
