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