mirror of https://github.com/acidanthera/audk.git
37 lines
1.0 KiB
C
37 lines
1.0 KiB
C
|
/** @file
|
||
|
|
64-bit left rotation for Ia32
|
||
|
|
|
||
|
Copyright (c) 2006 - 2007, Intel Corporation<BR>
|
||
|
|
All rights reserved. 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.
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
UINT64
|
||
|
|
EFIAPI
|
||
|
|
InternalMathLRotU64 (
|
||
|
|
IN UINT64 Operand,
|
||
|
|
IN UINTN Count
|
||
|
|
)
|
||
|
|
{
|
||
|
|
_asm {
|
||
|
|
mov cl, byte ptr [Count]
|
||
|
|
mov edx, dword ptr [Operand + 4]
|
||
|
|
mov eax, dword ptr [Operand + 0]
|
||
|
|
shld ebx, edx, cl
|
||
|
|
shld edx, eax, cl
|
||
|
|
ror ebx, cl
|
||
|
|
shld eax, ebx, cl
|
||
|
|
test cl, 32 ; Count >= 32?
|
||
|
|
cmovnz ecx, eax
|
||
|
|
cmovnz eax, edx
|
||
|
|
cmovnz edx, ecx
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|