Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2004 Microtronix Datacom Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * License.  See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) void *memmove(void *d, const void *s, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	unsigned long dst, src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		return d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	if (d < s) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		dst = (unsigned long) d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		src = (unsigned long) s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		if ((count < 8) || ((dst ^ src) & 3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 			goto restup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		if (dst & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 			*(char *)dst++ = *(char *)src++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 			count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		if (dst & 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 			*(short *)dst = *(short *)src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 			src += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			dst += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 			count -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		while (count > 3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 			*(long *)dst = *(long *)src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 			src += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 			dst += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 			count -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) restup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		while (count--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 			*(char *)dst++ = *(char *)src++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		dst = (unsigned long) d + count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		src = (unsigned long) s + count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		if ((count < 8) || ((dst ^ src) & 3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 			goto restdown;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		if (dst & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 			src--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 			dst--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 			*(char *)dst = *(char *)src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		if (dst & 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 			src -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 			dst -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 			count -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 			*(short *)dst = *(short *)src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		while (count > 3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 			src -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 			dst -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 			count -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 			*(long *)dst = *(long *)src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) restdown:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		while (count--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 			src--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 			dst--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 			*(char *)dst = *(char *)src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	return d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }