Annotation of /trunk/mkinitrd-magellan/klibc/usr/klibc/memset.c
Parent Directory
| 
Revision Log
Revision 532 -
(hide annotations)
(download)
Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 602 byte(s)
Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 602 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
| 1 | niro | 532 | /* |
| 2 | * memset.c | ||
| 3 | */ | ||
| 4 | |||
| 5 | #include <string.h> | ||
| 6 | #include <stdint.h> | ||
| 7 | |||
| 8 | void *memset(void *dst, int c, size_t n) | ||
| 9 | { | ||
| 10 | char *q = dst; | ||
| 11 | |||
| 12 | #if defined(__i386__) | ||
| 13 | size_t nl = n >> 2; | ||
| 14 | asm volatile ("cld ; rep ; stosl ; movl %3,%0 ; rep ; stosb" | ||
| 15 | : "+c" (nl), "+D" (q) | ||
| 16 | : "a" ((unsigned char)c * 0x01010101U), "r" (n & 3)); | ||
| 17 | #elif defined(__x86_64__) | ||
| 18 | size_t nq = n >> 3; | ||
| 19 | asm volatile ("cld ; rep ; stosq ; movl %3,%%ecx ; rep ; stosb" | ||
| 20 | :"+c" (nq), "+D" (q) | ||
| 21 | : "a" ((unsigned char)c * 0x0101010101010101U), | ||
| 22 | "r" ((uint32_t) n & 7)); | ||
| 23 | #else | ||
| 24 | while (n--) { | ||
| 25 | *q++ = c; | ||
| 26 | } | ||
| 27 | #endif | ||
| 28 | |||
| 29 | return dst; | ||
| 30 | } |