1 #include "misc.h" 2 #include "../string.c" 3 4 /* misc.h might pull in string_32.h which has a macro for memcpy. undef that */ 5 #undef memcpy 6 7 #ifdef CONFIG_X86_32 8 void *memcpy(void *dest, const void *src, size_t n) 9 { 10 int d0, d1, d2; 11 asm volatile( 12 "rep ; movsl\n\t" 13 "movl %4,%%ecx\n\t" 14 "rep ; movsb\n\t" 15 : "=&c" (d0), "=&D" (d1), "=&S" (d2) 16 : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) 17 : "memory"); 18 19 return dest; 20 } 21 #else 22 void *memcpy(void *dest, const void *src, size_t n) 23 { 24 long d0, d1, d2; 25 asm volatile( 26 "rep ; movsq\n\t" 27 "movq %4,%%rcx\n\t" 28 "rep ; movsb\n\t" 29 : "=&c" (d0), "=&D" (d1), "=&S" (d2) 30 : "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src) 31 : "memory"); 32 33 return dest; 34 } 35 #endif 36 37 void *memset(void *s, int c, size_t n) 38 { 39 int i; 40 char *ss = s; 41 42 for (i = 0; i < n; i++) 43 ss[i] = c; 44 return s; 45 } 46