| 29,9 → 29,6 |
|---|
| #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); |
| |
| /** Copy memory |
| * |
| * Copy a given number of bytes (3rd argument) |
| 69,18 → 66,18 |
|---|
| } |
| |
| |
| /** Compare memory |
| /** Compare memory regions for equality |
| * |
| * Compare a given number of bytes (3rd argument) |
| * at memory locations defined by 1st and 2nd argument |
| * for equality. If memory is equal, returns 0. |
| * for equality. If bytes are equal function returns 0. |
| * |
| * @param pointer 1 |
| * @param pointer 2 |
| * @param region 1 |
| * @param region 2 |
| * @param number of bytes |
| * @return 0 on match or non-zero if different |
| * @return zero if bytes are equal, non-zero otherwise |
| */ |
| static inline int memcmp(const void * mem1, const void * mem2, size_t cnt) |
| static inline int memcmp(__address src, __address dst, size_t cnt) |
| { |
| __u32 d0, d1, d2; |
| int ret; |
| 92,10 → 89,54 |
|---|
| "addl $1, %0\n\t" |
| "1:\n" |
| : "=a" (ret), "=%S" (d0), "=&D" (d1), "=&c" (d2) |
| : "0" (0), "1" (mem1), "2" (mem2), "3" (cnt) |
| : "0" (0), "1" (src), "2" (dst), "3" (cnt) |
| ); |
| |
| return ret; |
| } |
| |
| /** Fill memory with words |
| * Fill a given number of words (2nd argument) |
| * at memory defined by 1st argument with the |
| * word value defined by 3rd argument. |
| * |
| * @param destination |
| * @param number of words |
| * @param value to fill |
| */ |
| static inline void memsetw(__address dst, size_t cnt, __u16 x) |
| { |
| __u32 d0, d1; |
| |
| __asm__ __volatile__ ( |
| "rep stosw\n\t" |
| : "=&D" (d0), "=&c" (d1), "=a" (x) |
| : "0" (dst), "1" (cnt), "2" (x) |
| : "memory" |
| ); |
| |
| } |
| |
| /** Fill memory with bytes |
| * Fill a given number of bytes (2nd argument) |
| * at memory defined by 1st argument with the |
| * word value defined by 3rd argument. |
| * |
| * @param destination |
| * @param number of bytes |
| * @param value to fill |
| */ |
| static inline void memsetb(__address dst, size_t cnt, __u8 x) |
| { |
| __u32 d0, d1; |
| |
| __asm__ __volatile__ ( |
| "rep stosb\n\t" |
| : "=&D" (d0), "=&c" (d1), "=a" (x) |
| : "0" (dst), "1" (cnt), "2" (x) |
| : "memory" |
| ); |
| |
| } |
| |
| #endif |