aboutsummaryrefslogtreecommitdiff
path: root/arch/v850/lib/memcpy.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/v850/lib/memcpy.c')
-rw-r--r--arch/v850/lib/memcpy.c92
1 files changed, 0 insertions, 92 deletions
diff --git a/arch/v850/lib/memcpy.c b/arch/v850/lib/memcpy.c
deleted file mode 100644
index 492847b3e61..00000000000
--- a/arch/v850/lib/memcpy.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * arch/v850/lib/memcpy.c -- Memory copying
- *
- * Copyright (C) 2001,02 NEC Corporation
- * Copyright (C) 2001,02 Miles Bader <miles@gnu.org>
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file COPYING in the main directory of this
- * archive for more details.
- *
- * Written by Miles Bader <miles@gnu.org>
- */
-
-#include <linux/types.h>
-#include <asm/string.h>
-
-#define CHUNK_SIZE 32 /* bytes */
-#define CHUNK_ALIGNED(addr) (((unsigned long)addr & 0x3) == 0)
-
-/* Note that this macro uses 8 call-clobbered registers (not including
- R1), which are few enough so that the following functions don't need
- to spill anything to memory. It also uses R1, which is nominally
- reserved for the assembler, but here it should be OK. */
-#define COPY_CHUNK(src, dst) \
- asm ("mov %0, ep;" \
- "sld.w 0[ep], r1; sld.w 4[ep], r12;" \
- "sld.w 8[ep], r13; sld.w 12[ep], r14;" \
- "sld.w 16[ep], r15; sld.w 20[ep], r17;" \
- "sld.w 24[ep], r18; sld.w 28[ep], r19;" \
- "mov %1, ep;" \
- "sst.w r1, 0[ep]; sst.w r12, 4[ep];" \
- "sst.w r13, 8[ep]; sst.w r14, 12[ep];" \
- "sst.w r15, 16[ep]; sst.w r17, 20[ep];" \
- "sst.w r18, 24[ep]; sst.w r19, 28[ep]" \
- :: "r" (src), "r" (dst) \
- : "r1", "r12", "r13", "r14", "r15", \
- "r17", "r18", "r19", "ep", "memory");
-
-void *memcpy (void *dst, const void *src, __kernel_size_t size)
-{
- char *_dst = dst;
- const char *_src = src;
-
- if (size >= CHUNK_SIZE && CHUNK_ALIGNED(_src) && CHUNK_ALIGNED(_dst)) {
- /* Copy large blocks efficiently. */
- unsigned count;
- for (count = size / CHUNK_SIZE; count; count--) {
- COPY_CHUNK (_src, _dst);
- _src += CHUNK_SIZE;
- _dst += CHUNK_SIZE;
- }
- size %= CHUNK_SIZE;
- }
-
- if (size > 0)
- do
- *_dst++ = *_src++;
- while (--size);
-
- return dst;
-}
-
-void *memmove (void *dst, const void *src, __kernel_size_t size)
-{
- if ((unsigned long)dst < (unsigned long)src
- || (unsigned long)src + size < (unsigned long)dst)
- return memcpy (dst, src, size);
- else {
- char *_dst = dst + size;
- const char *_src = src + size;
-
- if (size >= CHUNK_SIZE
- && CHUNK_ALIGNED (_src) && CHUNK_ALIGNED (_dst))
- {
- /* Copy large blocks efficiently. */
- unsigned count;
- for (count = size / CHUNK_SIZE; count; count--) {
- _src -= CHUNK_SIZE;
- _dst -= CHUNK_SIZE;
- COPY_CHUNK (_src, _dst);
- }
- size %= CHUNK_SIZE;
- }
-
- if (size > 0)
- do
- *--_dst = *--_src;
- while (--size);
-
- return _dst;
- }
-}