1 ;------------------------------------------------------------------------------ 2 ; 3 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> 4 ; This program and the accompanying materials 5 ; are licensed and made available under the terms and conditions of the BSD License 6 ; which accompanies this distribution. The full text of the license may be found at 7 ; http://opensource.org/licenses/bsd-license.php. 8 ; 9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 ; 12 ; Module Name: 13 ; 14 ; MultU64x64.nasm 15 ; 16 ; Abstract: 17 ; 18 ; Calculate the product of a 64-bit integer and another 64-bit integer 19 ; 20 ;------------------------------------------------------------------------------ 21 22 SECTION .text 23 24 ;------------------------------------------------------------------------------ 25 ; UINT64 26 ; EFIAPI 27 ; InternalMathMultU64x64 ( 28 ; IN UINT64 Multiplicand, 29 ; IN UINT64 Multiplier 30 ; ); 31 ;------------------------------------------------------------------------------ 32 global ASM_PFX(InternalMathMultU64x64) 33 ASM_PFX(InternalMathMultU64x64): 34 push ebx 35 mov ebx, [esp + 8] ; ebx <- M1[0..31] 36 mov edx, [esp + 16] ; edx <- M2[0..31] 37 mov ecx, ebx 38 mov eax, edx 39 imul ebx, [esp + 20] ; ebx <- M1[0..31] * M2[32..63] 40 imul edx, [esp + 12] ; edx <- M1[32..63] * M2[0..31] 41 add ebx, edx ; carries are abandoned 42 mul ecx ; edx:eax <- M1[0..31] * M2[0..31] 43 add edx, ebx ; carries are abandoned 44 pop ebx 45 ret 46 47
