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Several improvements.

This commit is contained in:
Andreas Mohr 1999-11-25 22:04:08 +00:00 committed by Alexandre Julliard
parent 3f15f8165d
commit 6c8a67c3af
1 changed files with 80 additions and 8 deletions
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88
dlls/win87em/emulate.c
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@ -25,7 +25,58 @@ struct Win87EmInfoStruct
/* have a look at /usr/src/linux/arch/i386/math-emu/ *.[ch] for more info
* especially control_w.h and status_w.h
*/
/* FIXME: Only skeletal implementation for now */
/* FIXME: Still rather skeletal implementation only */
static BOOL Installed = 0;
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;
void WIN87_ClearCtrlWord( CONTEXT86 *context )
{
AX_reg(context) = 0;
if (Installed)
#ifdef __i386__
__asm__("fclex");
#else
;
#endif
StatusWord_3 = StatusWord_2 = 0;
}
void WIN87_SetCtrlWord( CONTEXT86 *context )
{
CtrlWord_1 = AX_reg(context);
AX_reg(context) &= 0xff3c;
if (Installed) {
CtrlWord_Internal = AX_reg(context);
#ifdef __i386__
__asm__("wait;fldcw %0" : : "m" (CtrlWord_Internal));
#endif
}
CtrlWord_2 = AX_reg(context);
}
void WIN87_Init( CONTEXT86 *context )
{
if (Installed) {
#ifdef __i386__
__asm__("fninit");
__asm__("fninit");
#endif
}
StackBottom = StackTop;
AX_reg(context) = 0x1332;
WIN87_SetCtrlWord(context);
WIN87_ClearCtrlWord(context);
}
void WINAPI WIN87_fpmath( CONTEXT86 *context )
{
@ -37,17 +88,24 @@ void WINAPI WIN87_fpmath( CONTEXT86 *context )
switch(BX_reg(context))
{
case 0: /* install (increase instanceref) emulator, install NMI vector */
RefCount++;
if (Installed)
/* InstallIntVecs02hAnd75h(); */ ;
WIN87_Init(context);
AX_reg(context) = 0;
break;
case 1: /* Init Emulator */
AX_reg(context) = 0;
WIN87_Init(context);
break;
case 2: /* deinstall emulator (decrease instanceref), deinstall NMI vector
* if zero. Every '0' call should have a matching '2' call.
*/
AX_reg(context) = 0;
WIN87_Init(context);
if (!(--RefCount) && (Installed))
/* RestoreInt02h() */ ;
break;
case 3:
@ -56,9 +114,11 @@ void WINAPI WIN87_fpmath( CONTEXT86 *context )
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 */
AX_reg(context) = CtrlWord_1;
break;
case 6: /* round top of stack to integer using method AX & 0x0C00 */
@ -92,10 +152,21 @@ void WINAPI WIN87_fpmath( CONTEXT86 *context )
}
break;
case 8: /* restore internal control words from emulator control word */
case 8: /* restore internal status words from emulator status word */
AX_reg(context) = 0;
if (Installed) {
#ifdef __i386__
__asm__("fstsw %0;wait" : "=m" (StatusWord_1));
#endif
AL_reg(context) = (BYTE)StatusWord_1 & 0x3f;
}
AX_reg(context) |= StatusWord_2;
AX_reg(context) &= 0x1fff;
StatusWord_2 = AX_reg(context);
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 */
@ -104,10 +175,11 @@ void WINAPI WIN87_fpmath( CONTEXT86 *context )
case 11: /* just returns the installed flag in DX:AX */
DX_reg(context) = 0;
AX_reg(context) = 1;
AX_reg(context) = Installed;
break;
case 12: /* save AX in some internal state var */
Inthandler02hVar = AX_reg(context);
break;
default: /* error. Say that loud and clear */
@ -121,18 +193,18 @@ void WINAPI WIN87_fpmath( CONTEXT86 *context )
void WINAPI WIN87_WinEm87Info(struct Win87EmInfoStruct *pWIS,
int cbWin87EmInfoStruct)
{
TRACE("(%p,%d)\n",pWIS,cbWin87EmInfoStruct);
FIXME("(%p,%d), stub !\n",pWIS,cbWin87EmInfoStruct);
}
void WINAPI WIN87_WinEm87Restore(void *pWin87EmSaveArea,
int cbWin87EmSaveArea)
{
TRACE("(%p,%d)\n",
FIXME("(%p,%d), stub !\n",
pWin87EmSaveArea,cbWin87EmSaveArea);
}
void WINAPI WIN87_WinEm87Save(void *pWin87EmSaveArea, int cbWin87EmSaveArea)
{
TRACE("(%p,%d)\n",
FIXME("(%p,%d), stub !\n",
pWin87EmSaveArea,cbWin87EmSaveArea);
}