]>
git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseLib/Ia32/RRotU64.c
17fde84b9d7a905e72eb87e4dc80e4aa0b8d69b1
2 64-bit right rotation for Ia32
4 Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
19 Rotates a 64-bit integer right between 0 and 63 bits, filling
20 the high bits with the high low bits that were rotated.
22 This function rotates the 64-bit value Operand to the right by Count bits.
23 The high Count bits are fill with the low Count bits of Operand. The rotated
26 @param Operand The 64-bit operand to rotate right.
27 @param Count The number of bits to rotate right.
29 @return Operand >>> Count
40 mov cl
, byte ptr
[Count
]
41 mov eax
, dword ptr
[Operand
+ 0]
42 mov edx
, dword ptr
[Operand
+ 4]
47 test cl
, 32 // Count >= 32?