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| author | Hao Wu <hao.a.wu@intel.com> | 2016-08-17 14:26:25 +0800 |
|---|---|---|
| committer | Hao Wu <hao.a.wu@intel.com> | 2016-08-22 18:54:31 +0800 |
| commit | 02b5cf7fb1824e089f19ca03b685a1f196860bf6 (patch) | |
| tree | 8296c6959dad18b8c08c7b1b74d6d030fa566404 /MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c | |
| parent | 1944b02b03e14d023e8f2cd3d614df6eca9dc8f0 (diff) | |
| download | edk2-02b5cf7fb1824e089f19ca03b685a1f196860bf6.tar.gz edk2-02b5cf7fb1824e089f19ca03b685a1f196860bf6.tar.bz2 edk2-02b5cf7fb1824e089f19ca03b685a1f196860bf6.zip | |
MdePkg BaseMemoryLib: Add assembly implementation of API IsZeroBuffer()
Add the implementation of API IsZeroBuffer() via assembly for the
following library instances:
BaseMemoryLibMmx
BaseMemoryLibOptDxe
BaseMemoryLibOptPei
BaseMemoryLibRepStr
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c b/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c new file mode 100644 index 0000000000..c42c1aa509 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibRepStr/IsZeroBufferWrapper.c @@ -0,0 +1,54 @@ +/** @file
+ Implementation of IsZeroBuffer function.
+
+ The following BaseMemoryLib instances contain the same copy of this file:
+
+ BaseMemoryLib
+ BaseMemoryLibMmx
+ BaseMemoryLibSse2
+ BaseMemoryLibRepStr
+ BaseMemoryLibOptDxe
+ BaseMemoryLibOptPei
+ PeiMemoryLib
+ UefiMemoryLib
+
+ Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "MemLibInternals.h"
+
+/**
+ Checks if the contents of a buffer are all zeros.
+
+ This function checks whether the contents of a buffer are all zeros. If the
+ contents are all zeros, return TRUE. Otherwise, return FALSE.
+
+ If Length > 0 and Buffer is NULL, then ASSERT().
+ If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
+
+ @param Buffer The pointer to the buffer to be checked.
+ @param Length The size of the buffer (in bytes) to be checked.
+
+ @retval TRUE Contents of the buffer are all zeros.
+ @retval FALSE Contents of the buffer are not all zeros.
+
+**/
+BOOLEAN
+EFIAPI
+IsZeroBuffer (
+ IN CONST VOID *Buffer,
+ IN UINTN Length
+ )
+{
+ ASSERT (!(Buffer == NULL && Length > 0));
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
+ return InternalMemIsZeroBuffer (Buffer, Length);
+}
|