Merge pull request #193 from gsomlo/gls-memcpy-fix

software/libbase: memcpy: simple, arch-width agnostic implementation

litex/soc/software/libbase/libc.c

@@ -293,71 +293,12 @@ void *memset(void *s, int c, size_t count)
  */
 void *memcpy(void *to, const void *from, size_t n)
 {
-	void *xto = to;
-	size_t temp;
-
-	if(!n)
-		return xto;
-	if((long)to & 1) {
-		char *cto = to;
-		const char *cfrom = from;
-		*cto++ = *cfrom++;
-		to = cto;
-		from = cfrom;
-		n--;
-	}
-	if((long)from & 1) {
-		char *cto = to;
-		const char *cfrom = from;
-		for (; n; n--)
-			*cto++ = *cfrom++;
-		return xto;
-	}
-	if(n > 2 && (long)to & 2) {
-		short *sto = to;
-		const short *sfrom = from;
-		*sto++ = *sfrom++;
-		to = sto;
-		from = sfrom;
-		n -= 2;
-	}
-	if((long)from & 2) {
-		short *sto = to;
-		const short *sfrom = from;
-		temp = n >> 1;
-		for (; temp; temp--)
-			*sto++ = *sfrom++;
-		to = sto;
-		from = sfrom;
-		if(n & 1) {
-			char *cto = to;
-			const char *cfrom = from;
-			*cto = *cfrom;
-		}
-		return xto;
-	}
-	temp = n >> 2;
-	if(temp) {
-		long *lto = to;
-		const long *lfrom = from;
-		for(; temp; temp--)
-			*lto++ = *lfrom++;
-		to = lto;
-		from = lfrom;
-	}
-	if(n & 2) {
-		short *sto = to;
-		const short *sfrom = from;
-		*sto++ = *sfrom++;
-		to = sto;
-		from = sfrom;
-	}
-	if(n & 1) {
-		char *cto = to;
-		const char *cfrom = from;
-		*cto = *cfrom;
-	}
-	return xto;
+	char *tmp = to;
+	const char *s = from;
+
+	while (n--)
+		*tmp++ = *s++;
+	return to;
 }
 
 /**