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| Source at commit 1158 created 13 years 16 days ago. By azimutz, Match nvidia.c with the one on my branch (Chazi) adding dev id's from issue 99 and Asus G74SX (0DF4, 1251). | |
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| 1 | /*␊ |
| 2 | * memmove.c␊ |
| 3 | */␊ |
| 4 | ␊ |
| 5 | #include "libsaio.h"␊ |
| 6 | ␊ |
| 7 | void *memmove(void *dst, const void *src, size_t n)␊ |
| 8 | {␊ |
| 9 | ␉const char *p = src;␊ |
| 10 | ␉char *q = dst;␊ |
| 11 | #if defined(__i386__) || defined(__x86_64__)␊ |
| 12 | ␉if (q < p) {␊ |
| 13 | ␉␉asm volatile("cld; rep; movsb"␊ |
| 14 | ␉␉␉ : "+c" (n), "+S"(p), "+D"(q));␊ |
| 15 | ␉} else {␊ |
| 16 | ␉␉p += (n - 1);␊ |
| 17 | ␉␉q += (n - 1);␊ |
| 18 | ␉␉asm volatile("std; rep; movsb; cld"␊ |
| 19 | ␉␉␉ : "+c" (n), "+S"(p), "+D"(q));␊ |
| 20 | ␉}␊ |
| 21 | #else␊ |
| 22 | ␉if (q < p) {␊ |
| 23 | ␉␉while (n--) {␊ |
| 24 | ␉␉␉*q++ = *p++;␊ |
| 25 | ␉␉}␊ |
| 26 | ␉} else {␊ |
| 27 | ␉␉p += n;␊ |
| 28 | ␉␉q += n;␊ |
| 29 | ␉␉while (n--) {␊ |
| 30 | ␉␉␉*--q = *--p;␊ |
| 31 | ␉␉}␊ |
| 32 | ␉}␊ |
| 33 | #endif␊ |
| 34 | ␊ |
| 35 | ␉return dst;␊ |
| 36 | }␊ |
| 37 | |
