From b61cf76aba768513ab2a1fa9e7cc80f59dbce02f Mon Sep 17 00:00:00 2001
From: Jörg Hohensohn <hohensoh@rockbox.org>
Date: Thu, 18 Mar 2004 22:06:36 +0000
Subject: patch #917153: faster memset()/memcpy()

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4406 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/common/memcpy.c | 117 -----------------------------------------------
 1 file changed, 117 deletions(-)
 delete mode 100644 firmware/common/memcpy.c

(limited to 'firmware/common/memcpy.c')

diff --git a/firmware/common/memcpy.c b/firmware/common/memcpy.c
deleted file mode 100644
index 49678920fa..0000000000
--- a/firmware/common/memcpy.c
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
-FUNCTION
-        <<memcpy>>---copy memory regions
-
-ANSI_SYNOPSIS
-        #include <string.h>
-        void* memcpy(void *<[out]>, const void *<[in]>, size_t <[n]>);
-
-TRAD_SYNOPSIS
-        void *memcpy(<[out]>, <[in]>, <[n]>
-        void *<[out]>;
-        void *<[in]>;
-        size_t <[n]>;
-
-DESCRIPTION
-        This function copies <[n]> bytes from the memory region
-        pointed to by <[in]> to the memory region pointed to by
-        <[out]>.
-
-        If the regions overlap, the behavior is undefined.
-
-RETURNS
-        <<memcpy>> returns a pointer to the first byte of the <[out]>
-        region.
-
-PORTABILITY
-<<memcpy>> is ANSI C.
-
-<<memcpy>> requires no supporting OS subroutines.
-
-QUICKREF
-        memcpy ansi pure
-	*/
-
-#include <_ansi.h>
-#include <stddef.h>
-#include <limits.h>
-
-/* Nonzero if either X or Y is not aligned on a "long" boundary.  */
-#define UNALIGNED(X, Y) \
-  (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1)))
-
-/* How many bytes are copied each iteration of the 4X unrolled loop.  */
-#define BIGBLOCKSIZE    (sizeof (long) << 2)
-
-/* How many bytes are copied each iteration of the word copy loop.  */
-#define LITTLEBLOCKSIZE (sizeof (long))
-
-/* Threshhold for punting to the byte copier.  */
-#define TOO_SMALL(LEN)  ((LEN) < BIGBLOCKSIZE)
-
-_PTR
-_DEFUN (memcpy, (dst0, src0, len0),
-	_PTR dst0 _AND
-	_CONST _PTR src0 _AND
-	size_t len0) __attribute__ ((section (".icode")));
-
-_PTR
-_DEFUN (memcpy, (dst0, src0, len0),
-	_PTR dst0 _AND
-	_CONST _PTR src0 _AND
-	size_t len0)
-{
-#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
-  char *dst = (char *) dst0;
-  char *src = (char *) src0;
-
-  _PTR save = dst0;
-
-  while (len0--)
-    {
-      *dst++ = *src++;
-    }
-
-  return save;
-#else
-  char *dst = dst0;
-  _CONST char *src = src0;
-  long *aligned_dst;
-  _CONST long *aligned_src;
-  unsigned int   len =  len0;
-
-  /* If the size is small, or either SRC or DST is unaligned,
-     then punt into the byte copy loop.  This should be rare.  */
-  if (!TOO_SMALL(len) && !UNALIGNED (src, dst))
-    {
-      aligned_dst = (long*)dst;
-      aligned_src = (long*)src;
-
-      /* Copy 4X long words at a time if possible.  */
-      while (len >= BIGBLOCKSIZE)
-        {
-          *aligned_dst++ = *aligned_src++;
-          *aligned_dst++ = *aligned_src++;
-          *aligned_dst++ = *aligned_src++;
-          *aligned_dst++ = *aligned_src++;
-          len -= BIGBLOCKSIZE;
-        }
-
-      /* Copy one long word at a time if possible.  */
-      while (len >= LITTLEBLOCKSIZE)
-        {
-          *aligned_dst++ = *aligned_src++;
-          len -= LITTLEBLOCKSIZE;
-        }
-
-       /* Pick up any residual with a byte copier.  */
-      dst = (char*)aligned_dst;
-      src = (char*)aligned_src;
-    }
-
-  while (len--)
-    *dst++ = *src++;
-
-  return dst0;
-#endif /* not PREFER_SIZE_OVER_SPEED */
-}
-- 
cgit v1.2.3