| 1,5 → 1,6 |
|---|
| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * Copyright (C) 2005 HelenOS project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 212,41 → 213,4 |
|---|
| return v; |
| } |
| |
| /** 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 |