Unaligned.c revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/** @file
Unaligned access functions of BaseLib for ARM.
volatile was added to work around optimization issues.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2008 - 2009, Apple Inc. 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
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 "BaseLibInternals.h"
/**
Reads a 16-bit value from memory that may be unaligned.
This function returns the 16-bit value pointed to by Buffer. The function
guarantees that the read operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
@param Buffer The pointer to a 16-bit value that may be unaligned.
@return The 16-bit value read from Buffer.
**/
)
{
volatile UINT8 HigherByte;
}
/**
Writes a 16-bit value to memory that may be unaligned.
This function writes the 16-bit value specified by Value to Buffer. Value is
returned. The function guarantees that the write operation does not produce
an alignment fault.
If the Buffer is NULL, then ASSERT().
@param Buffer The pointer to a 16-bit value that may be unaligned.
@param Value 16-bit value to write to Buffer.
@return The 16-bit value to write to Buffer.
**/
)
{
return Value;
}
/**
Reads a 24-bit value from memory that may be unaligned.
This function returns the 24-bit value pointed to by Buffer. The function
guarantees that the read operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
@param Buffer The pointer to a 24-bit value that may be unaligned.
@return The 24-bit value read from Buffer.
**/
)
{
return (UINT32)(
);
}
/**
Writes a 24-bit value to memory that may be unaligned.
This function writes the 24-bit value specified by Value to Buffer. Value is
returned. The function guarantees that the write operation does not produce
an alignment fault.
If the Buffer is NULL, then ASSERT().
@param Buffer The pointer to a 24-bit value that may be unaligned.
@param Value 24-bit value to write to Buffer.
@return The 24-bit value to write to Buffer.
**/
)
{
return Value;
}
/**
Reads a 32-bit value from memory that may be unaligned.
This function returns the 32-bit value pointed to by Buffer. The function
guarantees that the read operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
@param Buffer The pointer to a 32-bit value that may be unaligned.
@return The 32-bit value read from Buffer.
**/
)
{
}
/**
Writes a 32-bit value to memory that may be unaligned.
This function writes the 32-bit value specified by Value to Buffer. Value is
returned. The function guarantees that the write operation does not produce
an alignment fault.
If the Buffer is NULL, then ASSERT().
@param Buffer The pointer to a 32-bit value that may be unaligned.
@param Value 32-bit value to write to Buffer.
@return The 32-bit value to write to Buffer.
**/
)
{
return Value;
}
/**
Reads a 64-bit value from memory that may be unaligned.
This function returns the 64-bit value pointed to by Buffer. The function
guarantees that the read operation does not produce an alignment fault.
If the Buffer is NULL, then ASSERT().
@param Buffer The pointer to a 64-bit value that may be unaligned.
@return The 64-bit value read from Buffer.
**/
)
{
}
/**
Writes a 64-bit value to memory that may be unaligned.
This function writes the 64-bit value specified by Value to Buffer. Value is
returned. The function guarantees that the write operation does not produce
an alignment fault.
If the Buffer is NULL, then ASSERT().
@param Buffer The pointer to a 64-bit value that may be unaligned.
@param Value 64-bit value to write to Buffer.
@return The 64-bit value to write to Buffer.
**/
)
{
return Value;
}