mirror of
git://source.winehq.org/git/wine.git
synced 2024-09-01 20:23:39 +00:00
![Eric Pouech](/assets/img/avatar_default.png)
Signed-off-by: Eric Pouech <eric.pouech@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
245 lines
7.3 KiB
C
245 lines
7.3 KiB
C
/*
|
|
* Copyright 1993 Bob Amstadt
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include "windef.h"
|
|
#include "wine/debug.h"
|
|
|
|
WINE_DEFAULT_DEBUG_CHANNEL(int);
|
|
|
|
struct Win87EmInfoStruct
|
|
{
|
|
unsigned short Version;
|
|
unsigned short SizeSaveArea;
|
|
unsigned short WinDataSeg;
|
|
unsigned short WinCodeSeg;
|
|
unsigned short Have80x87;
|
|
unsigned short Unused;
|
|
};
|
|
|
|
/* Implementing this is easy cause Linux and *BSD* ALWAYS have a numerical
|
|
* coprocessor. (either real or emulated on kernellevel)
|
|
*/
|
|
/* win87em.dll also sets interrupt vectors: 2 (NMI), 0x34 - 0x3f (emulator
|
|
* calls of standard libraries, see Ralph Browns interrupt list), 0x75
|
|
* (int13 error reporting of coprocessor)
|
|
*/
|
|
|
|
/* have a look at /usr/src/linux/arch/i386/math-emu/ *.[ch] for more info
|
|
* especially control_w.h and status_w.h
|
|
*/
|
|
/* FIXME: Still rather skeletal implementation only */
|
|
|
|
static BOOL Installed = TRUE; /* 8087 is installed */
|
|
static WORD RefCount = 0;
|
|
static WORD CtrlWord_1 = 0;
|
|
static WORD CtrlWord_2 = 0;
|
|
static WORD CtrlWord_Internal = 0;
|
|
static WORD StatusWord_1 = 0x000b;
|
|
static WORD StatusWord_2 = 0;
|
|
static WORD StatusWord_3 = 0;
|
|
static WORD StackTop = 175;
|
|
static WORD StackBottom = 0;
|
|
static WORD Inthandler02hVar = 1;
|
|
|
|
static void WIN87_ClearCtrlWord( CONTEXT *context )
|
|
{
|
|
context->Eax &= ~0xffff; /* set AX to 0 */
|
|
if (Installed)
|
|
#ifdef __i386__
|
|
__asm__("fclex");
|
|
#else
|
|
;
|
|
#endif
|
|
StatusWord_3 = StatusWord_2 = 0;
|
|
}
|
|
|
|
static void WIN87_SetCtrlWord( CONTEXT *context )
|
|
{
|
|
CtrlWord_1 = LOWORD(context->Eax);
|
|
context->Eax &= ~0x00c3;
|
|
if (Installed) {
|
|
CtrlWord_Internal = LOWORD(context->Eax);
|
|
#ifdef __i386__
|
|
__asm__("wait;fldcw %0" : : "m" (CtrlWord_Internal));
|
|
#endif
|
|
}
|
|
CtrlWord_2 = LOWORD(context->Eax);
|
|
}
|
|
|
|
static void WIN87_Init( CONTEXT *context )
|
|
{
|
|
if (Installed) {
|
|
#ifdef __i386__
|
|
__asm__("fninit");
|
|
__asm__("fninit");
|
|
#endif
|
|
}
|
|
StackBottom = StackTop;
|
|
context->Eax = (context->Eax & ~0xffff) | 0x1332;
|
|
WIN87_SetCtrlWord(context);
|
|
WIN87_ClearCtrlWord(context);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* _fpMath (WIN87EM.1)
|
|
*/
|
|
void WINAPI _fpMath( CONTEXT *context )
|
|
{
|
|
TRACE("(cs:eip=%04lx:%04lx es=%04lx bx=%04lx ax=%04lx dx=%04lx)\n",
|
|
context->SegCs, context->Eip, context->SegEs, context->Ebx,
|
|
context->Eax, context->Edx );
|
|
|
|
switch(LOWORD(context->Ebx))
|
|
{
|
|
case 0: /* install (increase instanceref) emulator, install NMI vector */
|
|
RefCount++;
|
|
#if 0
|
|
if (Installed)
|
|
InstallIntVecs02hAnd75h();
|
|
#endif
|
|
WIN87_Init(context);
|
|
context->Eax &= ~0xffff; /* set AX to 0 */
|
|
break;
|
|
|
|
case 1: /* Init Emulator */
|
|
WIN87_Init(context);
|
|
break;
|
|
|
|
case 2: /* deinstall emulator (decrease instanceref), deinstall NMI vector
|
|
* if zero. Every '0' call should have a matching '2' call.
|
|
*/
|
|
WIN87_Init(context);
|
|
RefCount--;
|
|
#if 0
|
|
if (!RefCount && Installed)
|
|
RestoreInt02h();
|
|
#endif
|
|
|
|
break;
|
|
|
|
case 3:
|
|
/*INT_SetHandler(0x3E,MAKELONG(AX,DX));*/
|
|
break;
|
|
|
|
case 4: /* set control word (& ~(CW_Denormal|CW_Invalid)) */
|
|
/* OUT: newset control word in AX */
|
|
WIN87_SetCtrlWord(context);
|
|
break;
|
|
|
|
case 5: /* return internal control word in AX */
|
|
context->Eax = (context->Eax & ~0xffff) | CtrlWord_1;
|
|
break;
|
|
|
|
case 6: /* round top of stack to integer using method AX & 0x0C00 */
|
|
/* returns current controlword */
|
|
{
|
|
WORD save,mask;
|
|
/* I don't know much about asm() programming. This could be
|
|
* wrong.
|
|
*/
|
|
#ifdef __i386__
|
|
__asm__ __volatile__("fstcw %0;wait" : "=m" (save) : : "memory");
|
|
__asm__ __volatile__("fstcw %0;wait" : "=m" (mask) : : "memory");
|
|
__asm__ __volatile__("orw $0xC00,%0" : "=m" (mask) : : "memory");
|
|
__asm__ __volatile__("fldcw %0;wait" : : "m" (mask));
|
|
__asm__ __volatile__("frndint");
|
|
__asm__ __volatile__("fldcw %0" : : "m" (save));
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case 7: /* POP top of stack as integer into DX:AX */
|
|
/* IN: AX&0x0C00 rounding protocol */
|
|
/* OUT: DX:AX variable popped */
|
|
{
|
|
DWORD dw=0;
|
|
/* I don't know much about asm() programming. This could be
|
|
* wrong.
|
|
*/
|
|
/* FIXME: could someone who really understands asm() fix this please? --AJ */
|
|
/* __asm__("fistp %0;wait" : "=m" (dw) : : "memory"); */
|
|
TRACE("On top of stack was %ld\n",dw);
|
|
context->Eax = (context->Eax & ~0xffff) | LOWORD(dw);
|
|
context->Edx = (context->Edx & ~0xffff) | HIWORD(dw);
|
|
}
|
|
break;
|
|
|
|
case 8: /* restore internal status words from emulator status word */
|
|
context->Eax &= ~0xffff; /* set AX to 0 */
|
|
if (Installed) {
|
|
#ifdef __i386__
|
|
__asm__("fstsw %0;wait" : "=m" (StatusWord_1));
|
|
#endif
|
|
context->Eax |= StatusWord_1 & 0x3f;
|
|
}
|
|
context->Eax = (context->Eax | StatusWord_2) & ~0xe000;
|
|
StatusWord_2 = LOWORD(context->Eax);
|
|
break;
|
|
|
|
case 9: /* clear emu control word and some other things */
|
|
WIN87_ClearCtrlWord(context);
|
|
break;
|
|
|
|
case 10: /* dunno. but looks like returning nr. of things on stack in AX */
|
|
context->Eax &= ~0xffff; /* set AX to 0 */
|
|
break;
|
|
|
|
case 11: /* just returns the installed flag in DX:AX */
|
|
context->Edx &= ~0xffff; /* set DX to 0 */
|
|
context->Eax = (context->Eax & ~0xffff) | Installed;
|
|
break;
|
|
|
|
case 12: /* save AX in some internal state var */
|
|
Inthandler02hVar = LOWORD(context->Eax);
|
|
break;
|
|
|
|
default: /* error. Say that loud and clear */
|
|
FIXME("unhandled switch %d\n",LOWORD(context->Ebx));
|
|
context->Eax |= 0xffff;
|
|
context->Edx |= 0xffff;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/***********************************************************************
|
|
* __WinEm87Info (WIN87EM.3)
|
|
*/
|
|
void WINAPI __WinEm87Info(struct Win87EmInfoStruct *pWIS, int cbWin87EmInfoStruct)
|
|
{
|
|
FIXME("(%p,%d), stub !\n",pWIS,cbWin87EmInfoStruct);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* __WinEm87Restore (WIN87EM.4)
|
|
*/
|
|
void WINAPI __WinEm87Restore(void *pWin87EmSaveArea, int cbWin87EmSaveArea)
|
|
{
|
|
FIXME("(%p,%d), stub !\n",
|
|
pWin87EmSaveArea,cbWin87EmSaveArea);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* __WinEm87Save (WIN87EM.5)
|
|
*/
|
|
void WINAPI __WinEm87Save(void *pWin87EmSaveArea, int cbWin87EmSaveArea)
|
|
{
|
|
FIXME("(%p,%d), stub !\n",
|
|
pWin87EmSaveArea,cbWin87EmSaveArea);
|
|
}
|