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 * Multiplies a 64-bit signed or unsigned value by a 64-bit signed or unsigned value 21 * and returns a 64-bit result. 22 */ 23 __declspec(naked) void __cdecl _allmul (void) 24 { 25 // 26 // Wrapper Implementation over EDKII MultS64x64() routine 27 // INT64 28 // EFIAPI 29 // MultS64x64 ( 30 // IN INT64 Multiplicand, 31 // IN INT64 Multiplier 32 // ) 33 // 34 _asm { 35 ; Original local stack when calling _allmul 36 ; ----------------- 37 ; | | 38 ; |---------------| 39 ; | | 40 ; |--Multiplier --| 41 ; | | 42 ; |---------------| 43 ; | | 44 ; |--Multiplicand-| 45 ; | | 46 ; |---------------| 47 ; | ReturnAddr** | 48 ; ESP---->|---------------| 49 ; 50 51 ; 52 ; Set up the local stack for Multiplicand parameter 53 ; 54 mov eax, [esp + 16] 55 push eax 56 mov eax, [esp + 16] 57 push eax 58 59 ; 60 ; Set up the local stack for Multiplier parameter 61 ; 62 mov eax, [esp + 16] 63 push eax 64 mov eax, [esp + 16] 65 push eax 66 67 ; 68 ; Call native MulS64x64 of BaseLib 69 ; 70 call MultS64x64 71 72 ; 73 ; Adjust stack 74 ; 75 add esp, 16 76 77 ret 16 78 } 79 } 80
