mirror of https://github.com/acidanthera/audk.git
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
|
/** @file
|
||
|
|
|
||
|
|
Provide intrinsics within Oniguruma
|
||
|
|
|
||
|
|
Copyright (c) 2015, Hewlett-Packard Development Company, L.P.<BR>
|
||
|
|
|
||
|
|
This program and the accompanying materials are licensed and made available
|
||
|
|
under the terms and conditions of the BSD License that 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 <Library/BaseMemoryLib.h>
|
||
|
|
|
||
|
|
//
|
||
|
|
// From CryptoPkg/IntrinsicLib
|
||
|
|
//
|
||
|
|
|
||
|
|
/* Copies bytes between buffers */
|
||
|
|
#pragma function(memcpy)
|
||
|
|
void * memcpy (void *dest, const void *src, unsigned int count)
|
||
|
|
{
|
||
|
|
return CopyMem (dest, src, (UINTN)count);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Sets buffers to a specified character */
|
||
|
|
#pragma function(memset)
|
||
|
|
void * memset (void *dest, char ch, unsigned int count)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// NOTE: Here we use one base implementation for memset, instead of the direct
|
||
|
|
// optimized SetMem() wrapper. Because the IntrinsicLib has to be built
|
||
|
|
// without whole program optimization option, and there will be some
|
||
|
|
// potential register usage errors when calling other optimized codes.
|
||
|
|
//
|
||
|
|
|
||
|
|
//
|
||
|
|
// Declare the local variables that actually move the data elements as
|
||
|
|
// volatile to prevent the optimizer from replacing this function with
|
||
|
|
// the intrinsic memset()
|
||
|
|
//
|
||
|
|
volatile UINT8 *Pointer;
|
||
|
|
|
||
|
|
Pointer = (UINT8 *)dest;
|
||
|
|
while (count-- != 0) {
|
||
|
|
*(Pointer++) = ch;
|
||
|
|
}
|
||
|
|
|
||
|
|
return dest;
|
||
|
|
}
|