mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-18 15:27:48 +01:00
41 lines
1.4 KiB
NASM
41 lines
1.4 KiB
NASM
;------------------------------------------------------------------------------
|
|
;
|
|
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
;
|
|
; Module Name:
|
|
;
|
|
; MultU64x64.nasm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; Calculate the product of a 64-bit integer and another 64-bit integer
|
|
;
|
|
;------------------------------------------------------------------------------
|
|
|
|
SECTION .text
|
|
|
|
;------------------------------------------------------------------------------
|
|
; UINT64
|
|
; EFIAPI
|
|
; InternalMathMultU64x64 (
|
|
; IN UINT64 Multiplicand,
|
|
; IN UINT64 Multiplier
|
|
; );
|
|
;------------------------------------------------------------------------------
|
|
global ASM_PFX(InternalMathMultU64x64)
|
|
ASM_PFX(InternalMathMultU64x64):
|
|
push ebx
|
|
mov ebx, [esp + 8] ; ebx <- M1[0..31]
|
|
mov edx, [esp + 16] ; edx <- M2[0..31]
|
|
mov ecx, ebx
|
|
mov eax, edx
|
|
imul ebx, [esp + 20] ; ebx <- M1[0..31] * M2[32..63]
|
|
imul edx, [esp + 12] ; edx <- M1[32..63] * M2[0..31]
|
|
add ebx, edx ; carries are abandoned
|
|
mul ecx ; edx:eax <- M1[0..31] * M2[0..31]
|
|
add edx, ebx ; carries are abandoned
|
|
pop ebx
|
|
ret
|
|
|