projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 97f98500 HT |
1 | /** @file\r |
| 2 | 64-bit Math Worker Function.\r | |
| 3 | The 32-bit versions of C compiler generate calls to library routines\r | |
| 4 | to handle 64-bit math. These functions use non-standard calling conventions.\r | |
| 5 | \r | |
| 6 | Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
| 7 | This program and the accompanying materials\r | |
| 8 | are licensed and made available under the terms and conditions of the BSD License\r | |
| 9 | which accompanies this distribution. The full text of the license may be found at\r | |
| 10 | http://opensource.org/licenses/bsd-license.php\r | |
| 11 | \r | |
| 12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | \r | |
| 15 | **/\r | |
| 16 | \r | |
| 17 | #include <Library/BaseLib.h>\r | |
| 18 | \r | |
| 19 | \r | |
| 20 | /*\r | |
| 21 | * Divides a 64-bit unsigned value with a 64-bit unsigned value and returns\r | |
| 22 | * a 64-bit unsigned result.\r | |
| 23 | */\r | |
| 24 | __declspec(naked) void __cdecl _aulldiv (void)\r | |
| 25 | {\r | |
| 26 | //\r | |
| 27 | // Wrapper Implementation over EDKII DivU64x64Reminder() routine\r | |
| 28 | // UINT64\r | |
| 29 | // EFIAPI\r | |
| 30 | // DivU64x64Remainder (\r | |
| 31 | // IN UINT64 Dividend,\r | |
| 32 | // IN UINT64 Divisor,\r | |
| 33 | // OUT UINT64 *Remainder OPTIONAL\r | |
| 34 | // )\r | |
| 35 | //\r | |
| 36 | _asm {\r | |
| 37 | \r | |
| 38 | ; Original local stack when calling _aulldiv\r | |
| 39 | ; -----------------\r | |
| 40 | ; | |\r | |
| 41 | ; |---------------|\r | |
| 42 | ; | |\r | |
| 43 | ; |-- Divisor --|\r | |
| 44 | ; | |\r | |
| 45 | ; |---------------|\r | |
| 46 | ; | |\r | |
| 47 | ; |-- Dividend --|\r | |
| 48 | ; | |\r | |
| 49 | ; |---------------|\r | |
| 50 | ; | ReturnAddr** |\r | |
| 51 | ; ESP---->|---------------|\r | |
| 52 | ;\r | |
| 53 | \r | |
| 54 | ;\r | |
| 55 | ; Set up the local stack for NULL Reminder pointer\r | |
| 56 | ;\r | |
| 57 | xor eax, eax\r | |
| 58 | push eax\r | |
| 59 | \r | |
| 60 | ;\r | |
| 61 | ; Set up the local stack for Divisor parameter\r | |
| 62 | ;\r | |
| 63 | mov eax, [esp + 20]\r | |
| 64 | push eax\r | |
| 65 | mov eax, [esp + 20]\r | |
| 66 | push eax\r | |
| 67 | \r | |
| 68 | ;\r | |
| 69 | ; Set up the local stack for Dividend parameter\r | |
| 70 | ;\r | |
| 71 | mov eax, [esp + 20]\r | |
| 72 | push eax\r | |
| 73 | mov eax, [esp + 20]\r | |
| 74 | push eax\r | |
| 75 | \r | |
| 76 | ;\r | |
| 77 | ; Call native DivU64x64Remainder of BaseLib\r | |
| 78 | ;\r | |
| 79 | call DivU64x64Remainder\r | |
| 80 | \r | |
| 81 | ;\r | |
| 82 | ; Adjust stack\r | |
| 83 | ;\r | |
| 84 | add esp, 20\r | |
| 85 | \r | |
| 86 | ret 16\r | |
| 87 | }\r | |
| 88 | }\r |