2aa62f2bc9
This set of three packages: AppPkg, StdLib, StdLibPrivateInternalFiles; contains the implementation of libraries based upon non-UEFI standards such as ISO/IEC-9899, the library portion of the C Language Standard, POSIX, etc. AppPkg contains applications that make use of the standard libraries defined in the StdLib Package. StdLib contains header (include) files and the implementations of the standard libraries. StdLibPrivateInternalFiles contains files for the exclusive use of the library implementations in StdLib. These files should never be directly referenced from applications or other code. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11600 6f19259b-4bc3-4df7-8a09-765794883524
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/** @file
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64-bit Math Worker Function.
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The 32-bit versions of C compiler generate calls to library routines
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to handle 64-bit math. These functions use non-standard calling conventions.
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Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Library/BaseLib.h>
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/*
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* Divides a 64-bit signed value by another 64-bit signed value and returns
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* the 64-bit signed remainder.
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*/
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__declspec(naked) void __cdecl _allrem(void)
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{
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//
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// Wrapper Implementation over EDKII DivS64x64Remainder() routine
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// UINT64
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// EFIAPI
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// DivS64x64Remainder (
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// IN UINT64 Dividend,
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// IN UINT64 Divisor,
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// OUT UINT64 *Remainder
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// )
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//
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_asm {
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; Original local stack when calling _allrem
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; -----------------
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; | |
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; |---------------|
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; | |
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; |-- Divisor --|
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; | |
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; |---------------|
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; | |
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; |-- Dividend --|
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; | |
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; |---------------|
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; | ReturnAddr** |
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; ESP---->|---------------|
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;
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;
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; Set up the local stack for Reminder pointer
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;
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sub esp, 8
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push esp
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;
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; Set up the local stack for Divisor parameter
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;
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mov eax, [esp + 28]
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push eax
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mov eax, [esp + 28]
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push eax
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;
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; Set up the local stack for Dividend parameter
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;
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mov eax, [esp + 28]
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push eax
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mov eax, [esp + 28]
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push eax
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;
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; Call native DivS64x64Remainder of BaseLib
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;
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call DivS64x64Remainder
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;
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; Put the Reminder in EDX:EAX as return value
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;
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mov eax, [esp + 20]
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mov edx, [esp + 24]
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;
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; Adjust stack
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;
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add esp, 28
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ret 16
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}
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}
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