CloverBootloader/MdePkg/Library/BaseLib/Ia32/SwapBytes64.nasm
2019-09-03 12:58:42 +03:00

35 lines
913 B
NASM

;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
;
; CpuId.Asm
;
; Abstract:
;
; AsmCpuid function
;
; Notes:
;
;------------------------------------------------------------------------------
SECTION .text
;------------------------------------------------------------------------------
; UINT64
; EFIAPI
; InternalMathSwapBytes64 (
; IN UINT64 Operand
; );
;------------------------------------------------------------------------------
global ASM_PFX(InternalMathSwapBytes64)
ASM_PFX(InternalMathSwapBytes64):
mov eax, [esp + 8] ; eax <- upper 32 bits
mov edx, [esp + 4] ; edx <- lower 32 bits
bswap eax
bswap edx
ret