mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-01 12:53:27 +01:00
45 lines
1.2 KiB
NASM
45 lines
1.2 KiB
NASM
;------------------------------------------------------------------------------
|
|
;
|
|
; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
;
|
|
; Module Name:
|
|
;
|
|
; RRotU64.nasm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; 64-bit right rotation for Ia32
|
|
;
|
|
;------------------------------------------------------------------------------
|
|
|
|
SECTION .text
|
|
|
|
;------------------------------------------------------------------------------
|
|
; UINT64
|
|
; EFIAPI
|
|
; InternalMathRRotU64 (
|
|
; IN UINT64 Operand,
|
|
; IN UINTN Count
|
|
; );
|
|
;------------------------------------------------------------------------------
|
|
global ASM_PFX(InternalMathRRotU64)
|
|
ASM_PFX(InternalMathRRotU64):
|
|
push ebx
|
|
mov cl, [esp + 16]
|
|
mov eax, [esp + 8]
|
|
mov edx, [esp + 12]
|
|
shrd ebx, eax, cl
|
|
shrd eax, edx, cl
|
|
rol ebx, cl
|
|
shrd edx, ebx, cl
|
|
test cl, 32 ; Count >= 32?
|
|
jz .0
|
|
mov ecx, eax ; switch eax & edx if Count >= 32
|
|
mov eax, edx
|
|
mov edx, ecx
|
|
.0:
|
|
pop ebx
|
|
ret
|
|
|