MdePkg BaseMemoryLib: Add assembly implementation of API IsZeroBuffer()

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibRepStr / IsZeroBufferWrapper.c

diff --git a/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c b/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c
new file mode 100644 (file)
index 0000000..c42c1aa
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c
@@ -0,0 +1,54 @@
+/** @file\r
+  Implementation of IsZeroBuffer function.\r
+\r
+  The following BaseMemoryLib instances contain the same copy of this file:\r
+\r
+    BaseMemoryLib\r
+    BaseMemoryLibMmx\r
+    BaseMemoryLibSse2\r
+    BaseMemoryLibRepStr\r
+    BaseMemoryLibOptDxe\r
+    BaseMemoryLibOptPei\r
+    PeiMemoryLib\r
+    UefiMemoryLib\r
+\r
+  Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r
+  This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include "MemLibInternals.h"\r
+\r
+/**\r
+  Checks if the contents of a buffer are all zeros.\r
+\r
+  This function checks whether the contents of a buffer are all zeros. If the\r
+  contents are all zeros, return TRUE. Otherwise, return FALSE.\r
+\r
+  If Length > 0 and Buffer is NULL, then ASSERT().\r
+  If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r
+\r
+  @param  Buffer      The pointer to the buffer to be checked.\r
+  @param  Length      The size of the buffer (in bytes) to be checked.\r
+\r
+  @retval TRUE        Contents of the buffer are all zeros.\r
+  @retval FALSE       Contents of the buffer are not all zeros.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+IsZeroBuffer (\r
+  IN CONST VOID  *Buffer,\r
+  IN UINTN       Length\r
+  )\r
+{\r
+  ASSERT (!(Buffer == NULL && Length > 0));\r
+  ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));\r
+  return InternalMemIsZeroBuffer (Buffer, Length);\r
+}\r