mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-28 12:25:19 +01:00
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
|
/** @file
|
||
|
|
64-bit Math Worker Function.
|
||
|
|
The 32-bit versions of C compiler generate calls to library routines
|
||
|
|
to handle 64-bit math. These functions use non-standard calling conventions.
|
||
|
|
|
||
|
|
Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
|
||
|
|
This program and the accompanying materials
|
||
|
|
are licensed and made available under the terms and conditions of the BSD License
|
||
|
|
which accompanies this distribution. The full text of the license may be found at
|
||
|
|
http://opensource.org/licenses/bsd-license.php
|
||
|
|
|
||
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#include <Library/BaseLib.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Multiplies a 64-bit signed or unsigned value by a 64-bit signed or unsigned value
|
||
|
|
* and returns a 64-bit result.
|
||
|
|
*/
|
||
|
|
__declspec(naked) void __cdecl _allmul (void)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Wrapper Implementation over EDKII MultS64x64() routine
|
||
|
|
// INT64
|
||
|
|
// EFIAPI
|
||
|
|
// MultS64x64 (
|
||
|
|
// IN INT64 Multiplicand,
|
||
|
|
// IN INT64 Multiplier
|
||
|
|
// )
|
||
|
|
//
|
||
|
|
_asm {
|
||
|
|
; Original local stack when calling _allmul
|
||
|
|
; -----------------
|
||
|
|
; | |
|
||
|
|
; |---------------|
|
||
|
|
; | |
|
||
|
|
; |--Multiplier --|
|
||
|
|
; | |
|
||
|
|
; |---------------|
|
||
|
|
; | |
|
||
|
|
; |--Multiplicand-|
|
||
|
|
; | |
|
||
|
|
; |---------------|
|
||
|
|
; | ReturnAddr** |
|
||
|
|
; ESP---->|---------------|
|
||
|
|
;
|
||
|
|
|
||
|
|
;
|
||
|
|
; Set up the local stack for Multiplicand parameter
|
||
|
|
;
|
||
|
|
mov eax, [esp + 16]
|
||
|
|
push eax
|
||
|
|
mov eax, [esp + 16]
|
||
|
|
push eax
|
||
|
|
|
||
|
|
;
|
||
|
|
; Set up the local stack for Multiplier parameter
|
||
|
|
;
|
||
|
|
mov eax, [esp + 16]
|
||
|
|
push eax
|
||
|
|
mov eax, [esp + 16]
|
||
|
|
push eax
|
||
|
|
|
||
|
|
;
|
||
|
|
; Call native MulS64x64 of BaseLib
|
||
|
|
;
|
||
|
|
call MultS64x64
|
||
|
|
|
||
|
|
;
|
||
|
|
; Adjust stack
|
||
|
|
;
|
||
|
|
add esp, 16
|
||
|
|
|
||
|
|
ret 16
|
||
|
|
}
|
||
|
|
}
|