libc testsuite + fixes

git-svn-id: svn://kolibrios.org@6433 a494cfbc-eb01-0410-851d-a64ba20cac60

programs/develop/ktcc/trunk/libc/string/memmove.asm

@@ -7,29 +7,47 @@ public memcpy
 public memmove
 
 proc memcpy c, to:dword,from:dword,count:dword
-
-	mov ecx,[count]
+    push esi
+    push edi
+    mov ecx,[count]
 	test ecx,ecx
 	jz no_copy_block
-		
-		mov esi,[from]
+        mov esi,[from]
 		mov edi,[to]
+		cld
 		rep movsb
-	no_copy_block:
+no_copy_block:
 
+    pop edi
+    pop esi
+    mov eax, [to]
 	ret
 endp
 
 proc memmove c, to:dword,from:dword,count:dword
 
+    push esi
+    push edi
 	mov ecx,[count]
 	test ecx,ecx
 	jz no_copy_block_
-		
 		mov esi,[from]
 		mov edi,[to]
+		cmp esi, edi
+		je no_copy_block_
+		jg copy_
+            add	esi, ecx
+            add	edi, ecx
+            dec	esi
+            dec	edi
+            std
+copy_:
 		rep movsb
-	no_copy_block_:
+        cld
+no_copy_block_:
 
+    pop edi
+    pop esi
+    mov eax,[to]
 	ret
-endp
+endp