02b5cf7fb1
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>
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/** @file
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Implementation of IsZeroBuffer function.
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The following BaseMemoryLib instances contain the same copy of this file:
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BaseMemoryLib
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BaseMemoryLibMmx
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BaseMemoryLibSse2
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BaseMemoryLibRepStr
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BaseMemoryLibOptDxe
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BaseMemoryLibOptPei
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PeiMemoryLib
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UefiMemoryLib
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Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "MemLibInternals.h"
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/**
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Checks if the contents of a buffer are all zeros.
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This function checks whether the contents of a buffer are all zeros. If the
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contents are all zeros, return TRUE. Otherwise, return FALSE.
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If Length > 0 and Buffer is NULL, then ASSERT().
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If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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@param Buffer The pointer to the buffer to be checked.
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@param Length The size of the buffer (in bytes) to be checked.
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@retval TRUE Contents of the buffer are all zeros.
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@retval FALSE Contents of the buffer are not all zeros.
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**/
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BOOLEAN
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EFIAPI
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IsZeroBuffer (
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IN CONST VOID *Buffer,
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IN UINTN Length
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)
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{
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ASSERT (!(Buffer == NULL && Length > 0));
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ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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return InternalMemIsZeroBuffer (Buffer, Length);
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}
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