prefetch.h
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:1k
- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef PREFETCH_H
- #define PREFETCH_H
- #ifdef NDB_FORTE6
- #include <sun_prefetch.h>
- #endif
- #ifdef USE_PREFETCH
- #define PREFETCH(addr) prefetch(addr)
- #else
- #define PREFETCH(addr)
- #endif
- #ifdef USE_PREFETCH
- #define WRITEHINT(addr) writehint(addr)
- #else
- #define WRITEHINT(addr)
- #endif
- #include "PortDefs.h"
- #ifdef NDB_FORTE6
- #pragma optimize("", off)
- #endif
- inline void prefetch(void* p)
- {
- #ifdef NDB_ALPHA
- __asm(" ldl r31,0(a0);", p);
- #endif /* NDB_ALPHA */
- #ifdef NDB_FORTE6
- sparc_prefetch_read_once(p);
- #else
- (void)p;
- #endif
- }
- inline void writehint(void* p)
- {
- #ifdef NDB_ALPHA
- __asm(" wh64 (a0);", p);
- #endif /* NDB_ALPHA */
- #ifdef NDB_FORTE6
- sparc_prefetch_write_once(p);
- #else
- (void)p;
- #endif
- }
- #ifdef NDB_FORTE6
- #pragma optimize("", on)
- #endif
- #endif