/** @file | |
Implementation of 64-bit swap bytes | |
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
/** | |
Switches the endianess of a 64-bit integer. | |
This function swaps the bytes in a 64-bit unsigned value to switch the value | |
from little endian to big endian or vice versa. The byte swapped value is | |
returned. | |
@param Operand A 64-bit unsigned value. | |
@return The byte swaped Operand. | |
**/ | |
UINT64 | |
EFIAPI | |
InternalMathSwapBytes64 ( | |
IN UINT64 Operand | |
) | |
{ | |
_asm { | |
mov eax, dword ptr [Operand + 4] | |
mov edx, dword ptr [Operand + 0] | |
bswap eax | |
bswap edx | |
} | |
} |