4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/** @file
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync 64-bit arithmetic right shift function for IA-32.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This program and the accompanying materials
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync are licensed and made available under the terms and conditions of the BSD License
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync which accompanies this distribution. The full text of the license may be found at
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync http://opensource.org/licenses/bsd-license.php.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync**/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/**
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Shifts a 64-bit integer right between 0 and 63 bits. The high bits
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync are filled with original integer's bit 63. The shifted value is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This function shifts the 64-bit value Operand to the right by Count bits. The
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync high Count bits are set to bit 63 of Operand. The shifted value is returned.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Operand The 64-bit operand to shift right.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Count The number of bits to shift right.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return Operand arithmetically shifted right by Count.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync**/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncUINT64
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncEFIAPI
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncInternalMathARShiftU64 (
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync IN UINT64 Operand,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync IN UINTN Count
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync )
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync _asm {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mov cl, byte ptr [Count]
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mov eax, dword ptr [Operand + 4]
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cdq
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync test cl, 32
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cmovz edx, eax
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cmovz eax, dword ptr [Operand + 0]
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync shrd eax, edx, cl
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync sar edx, cl
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync