/** @file\r
64-bit left shift function for IA-32.\r
\r
- Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+ Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
-//\r
-// Include common header file for this module.\r
-//\r
+/**\r
+ Shifts a 64-bit integer left between 0 and 63 bits. The low bits\r
+ are filled with zeros. The shifted value is returned.\r
+\r
+ This function shifts the 64-bit value Operand to the left by Count bits. The\r
+ low Count bits are set to zero. The shifted value is returned.\r
+\r
+ @param Operand The 64-bit operand to shift left.\r
+ @param Count The number of bits to shift left.\r
\r
+ @return Operand << Count\r
\r
+**/\r
UINT64\r
EFIAPI\r
InternalMathLShiftU64 (\r
- IN UINT64 Operand,\r
- IN UINTN Count\r
+ IN UINT64 Operand,\r
+ IN UINTN Count\r
)\r
{\r
_asm {\r
xor eax, eax\r
mov edx, dword ptr [Operand + 0]\r
test cl, 32 // Count >= 32?\r
- cmovz eax, edx\r
- cmovz edx, dword ptr [Operand + 4]\r
+ jnz L0\r
+ mov eax, edx\r
+ mov edx, dword ptr [Operand + 4]\r
+L0:\r
shld edx, eax, cl\r
shl eax, cl\r
}\r
}\r
-\r