Remove old code

Signed-off-by: Richard Qin <richard.qin.x@gmail.com>

1 files changed, 0 insertions, 127 deletions

diff --git a/lib/string/memcpy.c b/lib/string/memcpy.c
deleted file mode 100644
index de26a00..0000000
--- a/lib/string/memcpy.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/* SPDX-License-Identifier: MIT */
-/* Derived from musl libc (Copyright © 2005-2020 Rich Felker, et al.) */
-
-#include <string.h>
-#include <stdint.h>
-#include <endian.h>
-
-void *memcpy(void *restrict dest, const void *restrict src, size_t n)
-{
-	unsigned char *d = dest;
-	const unsigned char *s = src;
-
-#ifdef __GNUC__
-
-#if __BYTE_ORDER == __LITTLE_ENDIAN
-#define LS >>
-#define RS <<
-#else
-#define LS <<
-#define RS >>
-#endif
-
-	typedef uint32_t __attribute__((__may_alias__)) u32;
-	uint32_t w, x;
-
-	for (; (uintptr_t)s % 4 && n; n--) *d++ = *s++;
-
-	if ((uintptr_t)d % 4 == 0) {
-		for (; n>=16; s+=16, d+=16, n-=16) {
-			*(u32 *)(d+0) = *(u32 *)(s+0);
-			*(u32 *)(d+4) = *(u32 *)(s+4);
-			*(u32 *)(d+8) = *(u32 *)(s+8);
-			*(u32 *)(d+12) = *(u32 *)(s+12);
-		}
-		if (n&8) {
-			*(u32 *)(d+0) = *(u32 *)(s+0);
-			*(u32 *)(d+4) = *(u32 *)(s+4);
-			d += 8; s += 8;
-		}
-		if (n&4) {
-			*(u32 *)(d+0) = *(u32 *)(s+0);
-			d += 4; s += 4;
-		}
-		if (n&2) {
-			*d++ = *s++; *d++ = *s++;
-		}
-		if (n&1) {
-			*d = *s;
-		}
-		return dest;
-	}
-
-	if (n >= 32) switch ((uintptr_t)d % 4) {
-	case 1:
-		w = *(u32 *)s;
-		*d++ = *s++;
-		*d++ = *s++;
-		*d++ = *s++;
-		n -= 3;
-		for (; n>=17; s+=16, d+=16, n-=16) {
-			x = *(u32 *)(s+1);
-			*(u32 *)(d+0) = (w LS 24) | (x RS 8);
-			w = *(u32 *)(s+5);
-			*(u32 *)(d+4) = (x LS 24) | (w RS 8);
-			x = *(u32 *)(s+9);
-			*(u32 *)(d+8) = (w LS 24) | (x RS 8);
-			w = *(u32 *)(s+13);
-			*(u32 *)(d+12) = (x LS 24) | (w RS 8);
-		}
-		break;
-	case 2:
-		w = *(u32 *)s;
-		*d++ = *s++;
-		*d++ = *s++;
-		n -= 2;
-		for (; n>=18; s+=16, d+=16, n-=16) {
-			x = *(u32 *)(s+2);
-			*(u32 *)(d+0) = (w LS 16) | (x RS 16);
-			w = *(u32 *)(s+6);
-			*(u32 *)(d+4) = (x LS 16) | (w RS 16);
-			x = *(u32 *)(s+10);
-			*(u32 *)(d+8) = (w LS 16) | (x RS 16);
-			w = *(u32 *)(s+14);
-			*(u32 *)(d+12) = (x LS 16) | (w RS 16);
-		}
-		break;
-	case 3:
-		w = *(u32 *)s;
-		*d++ = *s++;
-		n -= 1;
-		for (; n>=19; s+=16, d+=16, n-=16) {
-			x = *(u32 *)(s+3);
-			*(u32 *)(d+0) = (w LS 8) | (x RS 24);
-			w = *(u32 *)(s+7);
-			*(u32 *)(d+4) = (x LS 8) | (w RS 24);
-			x = *(u32 *)(s+11);
-			*(u32 *)(d+8) = (w LS 8) | (x RS 24);
-			w = *(u32 *)(s+15);
-			*(u32 *)(d+12) = (x LS 8) | (w RS 24);
-		}
-		break;
-	}
-	if (n&16) {
-		*d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++;
-		*d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++;
-		*d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++;
-		*d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++;
-	}
-	if (n&8) {
-		*d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++;
-		*d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++;
-	}
-	if (n&4) {
-		*d++ = *s++; *d++ = *s++; *d++ = *s++; *d++ = *s++;
-	}
-	if (n&2) {
-		*d++ = *s++; *d++ = *s++;
-	}
-	if (n&1) {
-		*d = *s;
-	}
-	return dest;
-#endif
-
-	for (; n; n--) *d++ = *s++;
-	return dest;
-}