| 2aa62f2b |
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 - 2011, Intel Corporation. All rights reserved.<BR>\r |
| 7 | This program and the accompanying materials are licensed and made available\r |
| 8 | under the terms and conditions of the BSD License which accompanies this\r |
| 9 | 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 signed value with a 64-bit signed value and returns\r |
| 22 | * a 64-bit signed result.\r |
| 23 | */\r |
| 24 | __declspec(naked) void __cdecl _alldiv (void)\r |
| 25 | {\r |
| 26 | //\r |
| 27 | // Wrapper Implementation over EDKII DivS64x64Remainder() routine\r |
| 28 | // INT64\r |
| 29 | // EFIAPI\r |
| 30 | // DivS64x64Remainder (\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 | ;Entry:\r |
| 39 | ; Arguments are passed on the stack:\r |
| 40 | ; 1st pushed: divisor (QWORD)\r |
| 41 | ; 2nd pushed: dividend (QWORD)\r |
| 42 | ;\r |
| 43 | ;Exit:\r |
| 44 | ; EDX:EAX contains the quotient (dividend/divisor)\r |
| 45 | ; NOTE: this routine removes the parameters from the stack.\r |
| 46 | ;\r |
| 47 | ; Original local stack when calling _alldiv\r |
| 48 | ; -----------------\r |
| 49 | ; | |\r |
| 50 | ; |---------------|\r |
| 51 | ; | |\r |
| 52 | ; |-- Divisor --|\r |
| 53 | ; | |\r |
| 54 | ; |---------------|\r |
| 55 | ; | |\r |
| 56 | ; |-- Dividend --|\r |
| 57 | ; | |\r |
| 58 | ; |---------------|\r |
| 59 | ; | ReturnAddr** |\r |
| 60 | ; ESP---->|---------------|\r |
| 61 | ;\r |
| 62 | \r |
| 63 | ;\r |
| 64 | ; Set up the local stack for NULL Reminder pointer\r |
| 65 | ;\r |
| 66 | xor eax, eax\r |
| 67 | push eax\r |
| 68 | \r |
| 69 | ;\r |
| 70 | ; Set up the local stack for Divisor parameter\r |
| 71 | ;\r |
| 72 | mov eax, [esp + 20]\r |
| 73 | push eax\r |
| 74 | mov eax, [esp + 20]\r |
| 75 | push eax\r |
| 76 | \r |
| 77 | ;\r |
| 78 | ; Set up the local stack for Dividend parameter\r |
| 79 | ;\r |
| 80 | mov eax, [esp + 20]\r |
| 81 | push eax\r |
| 82 | mov eax, [esp + 20]\r |
| 83 | push eax\r |
| 84 | \r |
| 85 | ;\r |
| 86 | ; Call native DivS64x64Remainder of BaseLib\r |
| 87 | ;\r |
| 88 | call DivS64x64Remainder\r |
| 89 | \r |
| 90 | ;\r |
| 91 | ; Adjust stack\r |
| 92 | ;\r |
| 93 | add esp, 20\r |
| 94 | \r |
| 95 | ret 16\r |
| 96 | }\r |
| 97 | }\r |
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