1 /** @file 2 64-bit Math Worker Function. 3 The 32-bit versions of C compiler generate calls to library routines 4 to handle 64-bit math. These functions use non-standard calling conventions. 5 6 Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR> 7 This program and the accompanying materials are licensed and made available 8 under the terms and conditions of the BSD License which accompanies this 9 distribution. The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php. 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 #include <Library/BaseLib.h> 18 19 20 /* 21 * Divides a 64-bit unsigned value with a 64-bit unsigned value and returns 22 * a 64-bit unsigned result. 23 */ 24 __declspec(naked) void __cdecl _aulldiv (void) 25 { 26 // 27 // Wrapper Implementation over EDKII DivU64x64Reminder() routine 28 // UINT64 29 // EFIAPI 30 // DivU64x64Remainder ( 31 // IN UINT64 Dividend, 32 // IN UINT64 Divisor, 33 // OUT UINT64 *Remainder OPTIONAL 34 // ) 35 // 36 _asm { 37 38 ; Original local stack when calling _aulldiv 39 ; ----------------- 40 ; | | 41 ; |---------------| 42 ; | | 43 ; |-- Divisor --| 44 ; | | 45 ; |---------------| 46 ; | | 47 ; |-- Dividend --| 48 ; | | 49 ; |---------------| 50 ; | ReturnAddr** | 51 ; ESP---->|---------------| 52 ; 53 54 ; 55 ; Set up the local stack for NULL Reminder pointer 56 ; 57 xor eax, eax 58 push eax 59 60 ; 61 ; Set up the local stack for Divisor parameter 62 ; 63 mov eax, [esp + 20] 64 push eax 65 mov eax, [esp + 20] 66 push eax 67 68 ; 69 ; Set up the local stack for Dividend parameter 70 ; 71 mov eax, [esp + 20] 72 push eax 73 mov eax, [esp + 20] 74 push eax 75 76 ; 77 ; Call native DivU64x64Remainder of BaseLib 78 ; 79 call DivU64x64Remainder 80 81 ; 82 ; Adjust stack 83 ; 84 add esp, 20 85 86 ret 16 87 } 88 } 89
