[PATCH 3/6] newlib: mem[p]cpy/memmove improve performance for optimized versions

[Alexey Lapshin]

This change improves performance on memory blocks with sizes in range
[4..15]. Performance measurements made for RISCV machine (memset):

size  4, CPU cycles change: 50 -> 37
size  5, CPU cycles change: 57 -> 40
size  6, CPU cycles change: 64 -> 47
size  7, CPU cycles change: 71 -> 54
size  8, CPU cycles change: 78 -> 44
size  9, CPU cycles change: 85 -> 47
size 10, CPU cycles change: 92 -> 54
size 11, CPU cycles change: 99 -> 61
size 12, CPU cycles change: 106 -> 51
size 13, CPU cycles change: 113 -> 54
size 14, CPU cycles change: 120 -> 61
size 15, CPU cycles change: 127 -> 68
---
 newlib/libc/string/memcpy.c  | 2 +-
 newlib/libc/string/memmove.c | 2 +-
 newlib/libc/string/mempcpy.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/newlib/libc/string/memcpy.c b/newlib/libc/string/memcpy.c
index 1bbd4e0bf..e680c444d 100644
--- a/newlib/libc/string/memcpy.c
+++ b/newlib/libc/string/memcpy.c
@@ -57,7 +57,7 @@ memcpy (void *__restrict dst0,
 
   /* 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_BIG_BLOCK(len0) && !UNALIGNED_X_Y(src, dst))
+  if (!TOO_SMALL_LITTLE_BLOCK(len0) && !UNALIGNED_X_Y(src, dst))
     {
       aligned_dst = (long*)dst;
       aligned_src = (long*)src;
diff --git a/newlib/libc/string/memmove.c b/newlib/libc/string/memmove.c
index a82744c7d..4c5ec6f83 100644
--- a/newlib/libc/string/memmove.c
+++ b/newlib/libc/string/memmove.c
@@ -85,7 +85,7 @@ memmove (void *dst_void,
       /* Use optimizing algorithm for a non-destructive copy to closely 
          match memcpy. 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_BIG_BLOCK(length) && !UNALIGNED_X_Y(src, dst))
+      if (!TOO_SMALL_LITTLE_BLOCK(length) && !UNALIGNED_X_Y(src, dst))
         {
           aligned_dst = (long*)dst;
           aligned_src = (long*)src;
diff --git a/newlib/libc/string/mempcpy.c b/newlib/libc/string/mempcpy.c
index 06e97de85..561892199 100644
--- a/newlib/libc/string/mempcpy.c
+++ b/newlib/libc/string/mempcpy.c
@@ -53,7 +53,7 @@ mempcpy (void *dst0,
 
   /* 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_BIG_BLOCK(len0) && !UNALIGNED_X_Y(src, dst))
+  if (!TOO_SMALL_LITTLE_BLOCK(len0) && !UNALIGNED_X_Y(src, dst))
     {
       aligned_dst = (long*)dst;
       aligned_src = (long*)src;
-- 
2.43.0