| 0,0 → 1,75 |
|---|
| /* |
| * Copyright (C) 2005 HelenOS project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef __ia32_MEMSTR_H__ |
| #define __ia32_MEMSTR_H__ |
| |
| extern void memsetw(__address dst, size_t cnt, __u16 x); |
| extern void memsetb(__address dst, size_t cnt, __u8 x); |
| |
| extern int memcmp(__address src, __address dst, int cnt); |
| |
| /** Copy memory |
| * |
| * Copy a given number of bytes (3rd argument) |
| * from the memory location defined by 2nd argument |
| * to the memory location defined by 1st argument. |
| * The memory areas cannot overlap. |
| * |
| * @param destination |
| * @param source |
| * @param number of bytes |
| * @return destination |
| */ |
| static inline void * memcpy(void * dst, const void * src, size_t cnt) |
| { |
| __u32 d0, d1, d2; |
| |
| __asm__ __volatile__( |
| /* copy all full dwords */ |
| "rep movsl\n\t" |
| /* load count again */ |
| "movl %4, %%ecx\n\t" |
| /* ecx = ecx mod 4 */ |
| "andl $3, %%ecx\n\t" |
| /* are there last <=3 bytes? */ |
| "jz 1f\n\t" |
| /* copy last <=3 bytes */ |
| "rep movsb\n\t" |
| /* exit from asm block */ |
| "1:\n" |
| : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
| : "0" (cnt / 4), "g" (cnt), "1" ((__u32) dst), "2" ((__u32) src) |
| : "memory"); |
| |
| return dst; |
| } |
| |
| |
| |
| #endif |