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add fstatus.inc

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git-svn-id: svn://kolibrios.org@702 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge) 2008-01-24 10:35:28 +00:00
parent 275695e8c3
commit 616f769298
13 changed files with 3584 additions and 2667 deletions
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14
programs/develop/open watcom/trunk/clib.wpj
View File

@ -4,8 +4,8 @@ projectIdent
VpeMain VpeMain
1 1
WRect WRect
32 -32
460 330
10304 10304
9950 9950
2 2
@ -32,8 +32,8 @@ WVList
VComponent VComponent
9 9
WRect WRect
2496 3384
30 580
5712 5712
7390 7390
0 0
@ -42,8 +42,8 @@ WRect
WFileName WFileName
10 10
clib_r.tgt clib_r.tgt
24 0
52 0
11 11
VComponent VComponent
12 12
@ -59,5 +59,5 @@ WFileName
7 7
crt.tgt crt.tgt
0 0
29 0
11 11

35
programs/develop/open watcom/trunk/clib/crt/_8087osi.c
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@ -1,35 +0,0 @@
/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: 80x87 related globals for OSI.
*
****************************************************************************/
#include "variety.h"
unsigned char _8087;
unsigned char _real87;

2
programs/develop/open watcom/trunk/clib/crt/chk8087.c
View File

@ -270,7 +270,7 @@ extern void __chk8087( void )
void __chk8087( void ) void __chk8087( void )
/********************/ /********************/
{ {
_RWD_real87 = 3; //387+ ; //__x87id(); _RWD_real87 = __x87id();
_RWD_8087 = _RWD_real87; _RWD_8087 = _RWD_real87;
__init_8087(); __init_8087();
} }

53
programs/develop/open watcom/trunk/clib/crt/cmodel.asm Normal file
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@ -0,0 +1,53 @@
;*****************************************************************************
;*
;* Open Watcom Project
;*
;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
;*
;* ========================================================================
;*
;* This file contains Original Code and/or Modifications of Original
;* Code as defined in and that are subject to the Sybase Open Watcom
;* Public License version 1.0 (the 'License'). You may not use this file
;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
;* provided with the Original Code and Modifications, and is also
;* available at www.sybase.com/developer/opensource.
;*
;* The Original Code and all software distributed under the License are
;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
;* NON-INFRINGEMENT. Please see the License for the specific language
;* governing rights and limitations under the License.
;*
;* ========================================================================
;*
;* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
;* DESCRIBE IT HERE!
;*
;*****************************************************************************
include mdef.inc
modstart cmodel
if _MODEL and _BIG_CODE
public _big_code_
_big_code_ label far
else
public _small_code_
_small_code_ label near
endif
;
; This is here so that if both _small_code_ and _big_code_ get hauled
; in from seperate libraries, the linker will complain about
; CodeModelMismatch being redefined
;
public CodeModelMismatch
CodeModelMismatch label near
endmod
end

16
programs/develop/open watcom/trunk/clib/crt/initrtns.c
View File

@ -153,7 +153,11 @@ static void callit( pfn *f ) {
; eax==15 -> run init routines whose priority is <= 15 ; eax==15 -> run init routines whose priority is <= 15
; ;
*/ */
#if defined(M_I86)
void _WCI86FAR __FInitRtns( unsigned limit ) {
__InitRtns( limit );
}
#endif
void __InitRtns( unsigned limit ) { void __InitRtns( unsigned limit ) {
__type_rtp local_limit; __type_rtp local_limit;
struct rt_init _WCI86NEAR *pnext; struct rt_init _WCI86NEAR *pnext;
@ -175,13 +179,11 @@ void __InitRtns( unsigned limit ) {
working_limit = local_limit; working_limit = local_limit;
// walk list of routines // walk list of routines
while( pcur < (struct rt_init _WCI86NEAR*)&_End_XI ) while( pcur < (struct rt_init _WCI86NEAR*)&_End_XI ) {
{
// if this one hasn't been called // if this one hasn't been called
if( pcur->rtn_type != PDONE ) { if( pcur->rtn_type != PDONE ) {
// if the priority is better than best so far // if the priority is better than best so far
if( pcur->priority <= working_limit ) if( pcur->priority <= working_limit ) {
{
// remember this one // remember this one
pnext = pcur; pnext = pcur;
working_limit = pcur->priority; working_limit = pcur->priority;
@ -224,9 +226,7 @@ void _WCI86FAR __FFiniRtns( unsigned min_limit, unsigned max_limit ) {
__FiniRtns( min_limit, max_limit ); __FiniRtns( min_limit, max_limit );
} }
#endif #endif
void __FiniRtns( unsigned min_limit, unsigned max_limit ) {
void __FiniRtns( unsigned min_limit, unsigned max_limit )
{
__type_rtp local_min_limit; __type_rtp local_min_limit;
__type_rtp local_max_limit; __type_rtp local_max_limit;
struct rt_init _WCI86NEAR *pnext; struct rt_init _WCI86NEAR *pnext;

44
programs/develop/open watcom/trunk/clib/crt/main2wnt.c
View File

@ -41,34 +41,48 @@
#include "initfini.h" #include "initfini.h"
#include "initarg.h" #include "initarg.h"
void _cdecl mf_init();
void _stdcall InitHeap(int heap_size); void _stdcall InitHeap(int heap_size);
int __appcwdlen; int __appcwdlen;
char* __appcwd; char* __appcwd;
_WCRTLINK void (*__process_fini)(unsigned,unsigned) = 0;
extern void __CommonInit( void );
extern int wmain( int, wchar_t ** );
extern int main( int, char ** );
extern char *LpCmdLine; extern char *LpCmdLine;
extern char *LpPgmName; extern char *LpPgmName;
_WCRTLINK void (*__process_fini)(unsigned,unsigned) = 0;
#ifdef __SW_BR
_WCRTLINK extern void (*__process_fini)( unsigned, unsigned );
extern void __CommonInit( void );
extern int wmain( int, wchar_t ** );
extern int main( int, char ** );
#else
extern void __NTMainInit( void *, void * );
#ifdef __WIDECHAR__
extern void __wCMain( void );
#if defined(_M_IX86)
#pragma aux __wCMain "*"
#endif
#else
extern void __CMain( void );
#if defined(_M_IX86)
#pragma aux __CMain "*"
#endif
#endif
extern unsigned __ThreadDataSize;
#endif
void __F_NAME(__NTMain,__wNTMain)( void ) void __F_NAME(__NTMain,__wNTMain)( void )
/***************************************/ /***************************************/
{ {
InitHeap(32*1024*1024); InitHeap(0);
//mf_init();
__process_fini = &__FiniRtns;
__process_fini = &__FiniRtns;
__InitRtns( 255 ); __InitRtns( 255 );
__CommonInit(); __CommonInit();
__appcwdlen = strrchr(_LpPgmName, '/') - _LpPgmName + 1; __appcwdlen = strrchr(_LpPgmName, '/') - _LpPgmName + 1;
__appcwdlen = __appcwdlen > 512 ? 512 : __appcwdlen; __appcwdlen = __appcwdlen > 512 ? 512 : __appcwdlen;
__appcwd= (char*)malloc(__appcwdlen); __appcwd= (char*)malloc(__appcwdlen);
strncpy(__appcwd, _LpPgmName, __appcwdlen); strncpy(__appcwd, _LpPgmName, __appcwdlen);
__appcwd[__appcwdlen] = 0; __appcwd[__appcwdlen] = 0;
___Argc = 2; ___Argc = 2;
@ -100,6 +114,6 @@ _WCRTLINK void __exit( unsigned ret_code )
mov eax, -1 mov eax, -1
int 0x40 int 0x40
} }
} }

122
programs/develop/open watcom/trunk/clib/fpu/chipw32.asm Normal file
View File

@ -0,0 +1,122 @@
;*****************************************************************************
;*
;* Open Watcom Project
;*
;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
;*
;* ========================================================================
;*
;* This file contains Original Code and/or Modifications of Original
;* Code as defined in and that are subject to the Sybase Open Watcom
;* Public License version 1.0 (the 'License'). You may not use this file
;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
;* provided with the Original Code and Modifications, and is also
;* available at www.sybase.com/developer/opensource.
;*
;* The Original Code and all software distributed under the License are
;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
;* NON-INFRINGEMENT. Please see the License for the specific language
;* governing rights and limitations under the License.
;*
;* ========================================================================
;*
;* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
;* DESCRIBE IT HERE!
;*
;*****************************************************************************
; static char sccs_id[] = "@(#)wrap32.asm 1.1 12/15/94 15:56:32";
;
; This code is being published by Intel to users of the Pentium(tm)
; processor. Recipients are authorized to copy, modify, compile, use and
; distribute the code.
;
; Intel makes no warranty of any kind with regard to this code, including
; but not limited to, implied warranties or merchantability and fitness for
; a particular purpose. Intel assumes no responsibility for any errors that
; may appear in this code.
;
; No patent licenses are granted, express or implied.
;
;
; The following code is a PRELIMINARY IMPLEMENTATION of a
; software patch for the FPATAN instruction replacement.
;
;
include mdef.inc
.386
.387
DATA32 SEGMENT DWORD USE32 PUBLIC 'DATA'
FPU_STATE STRUC
CONTROL_WORD DW ?
reserved_1 DW ?
STATUS_WORD DW ?
reserved_2 DW ?
TAG_WORD DW ?
reserved_3 DW ?
IP_OFFSET DD ?
CS_SLCT DW ?
OPCODE DW ?
DATA_OFFSET DD ?
OPERAND_SLCT DW ?
reserved_4 DW ?
REGISTER_0 DT ?
REGISTER_1 DT ?
REGISTER_2 DT ?
REGISTER_3 DT ?
REGISTER_4 DT ?
REGISTER_5 DT ?
REGISTER_6 DT ?
REGISTER_7 DT ?
SAVE_REG_0 DT ?
FPU_STATE ENDS
ENV_SIZE EQU 118
DATA32 ENDS
DGROUP GROUP DATA32
_TEXT SEGMENT DWORD USE32 PUBLIC 'CODE'
assume cs:_TEXT, ds:DGROUP, es:DGROUP, ss:nothing
public __fpatan_wrap
;
; PRELIMINARY VERSION for FPATAN instruction replacement
;
EXTRN __fpatan_chk:NEAR
defpe __fpatan_wrap
push eax
sub esp, ENV_SIZE
fstp tbyte ptr [esp].SAVE_REG_0
fnsave [esp]
fld tbyte ptr [esp].REGISTER_0
fld tbyte ptr [esp].SAVE_REG_0
call __fpatan_chk
fstsw ax
fstp tbyte ptr [esp].REGISTER_0
and ax, 0ffh
or ax, [esp].STATUS_WORD
mov [esp].STATUS_WORD, ax
frstor [esp]
add esp, ENV_SIZE
pop eax
ret
__fpatan_wrap ENDP
_TEXT ENDS
end

50
programs/develop/open watcom/trunk/clib/fpu/env387.inc Normal file
View File

@ -0,0 +1,50 @@
;*****************************************************************************
;*
;* Open Watcom Project
;*
;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
;*
;* ========================================================================
;*
;* This file contains Original Code and/or Modifications of Original
;* Code as defined in and that are subject to the Sybase Open Watcom
;* Public License version 1.0 (the 'License'). You may not use this file
;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
;* provided with the Original Code and Modifications, and is also
;* available at www.sybase.com/developer/opensource.
;*
;* The Original Code and all software distributed under the License are
;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
;* NON-INFRINGEMENT. Please see the License for the specific language
;* governing rights and limitations under the License.
;*
;* ========================================================================
;*
;* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
;* DESCRIBE IT HERE!
;*
;*****************************************************************************
; Define 80387 environment:
; ========================
;
; ---------------<--- offsets relative to here
; | | stack grows
; | | this way
; | | /|\
; | | |
; | |
; ---------------
ENV_SIZE equ 28 ; size of buffer required for 80387 environment
ENV_CW equ 0 ; control word
ENV_SW equ 4 ; status word
ENV_TW equ 8 ; tag word
ENV_IP equ 12 ; instruction pointer
ENV_OP equ 20 ; operand pointer

374
programs/develop/open watcom/trunk/clib/fpu/fpeinth.asm Normal file
View File

@ -0,0 +1,374 @@
;*****************************************************************************
;*
;* Open Watcom Project
;*
;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
;*
;* ========================================================================
;*
;* This file contains Original Code and/or Modifications of Original
;* Code as defined in and that are subject to the Sybase Open Watcom
;* Public License version 1.0 (the 'License'). You may not use this file
;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
;* provided with the Original Code and Modifications, and is also
;* available at www.sybase.com/developer/opensource.
;*
;* The Original Code and all software distributed under the License are
;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
;* NON-INFRINGEMENT. Please see the License for the specific language
;* governing rights and limitations under the License.
;*
;* ========================================================================
;*
;* Description: 80x87 interrupt handler.
;*
;*****************************************************************************
;;; //e:\watcom\src\bld\watcom\h;E:\WATCOM\H;E:\WATCOM\H\NT
.8087
.386p
include struct.inc
include mdef.inc
include stword.inc
include env387.inc
include fstatus.inc
ifndef __NETWARE__
xref __GETDS
endif
xref __8087 ; indicate that NDP instructions are present
modstart fpeinth
datasegment
extrn __FPE_exception_: proc
extrn "C",_STACKLOW : dword
TInf db 00h,00h,00h,00h,00h,00h,00h,80h,0ffh,7fh
F8Inf db 0ffh,0ffh,0ffh,0ffh,0ffh,0ffh,0efh,7fh
F4Inf db 0ffh,0ffh,7fh,7fh
db 512 dup(0)
FPEStk label byte
SaveSS dw 0
SaveESP dd 0
enddata
; Interrupt handler for 80x87 exceptions.
xdefp __FPEHandler_
defp __FPEHandler_
public "C",__FPEHandlerStart_
__FPEHandlerStart_ label byte
push EAX ; save reg
mov AL,20h ; issue EOI to 8259 controller
out 20h,AL ; ...
out 0a0h,AL ; issue EOI to slave 8259
xor AX,AX ; clear busy signal
out 0f0h,AL ; ...
pop EAX ; restore regs
public __FPE2Handler_
__FPE2Handler_ label byte
push EAX ; save regs
push EBX ; ...
push ECX ; ...
push EDX ; ...
push ESI ; ...
push EDI ; ...
push EBP ; ...
push DS ; ...
push ES ; ...
sub ESP,ENV_SIZE ; make room for environment information
mov EBP,ESP ; point to buffer for 80x87 environment
fnstenv [EBP] ; get 80x87 environment
fwait ; wait for 80x87
fdisi ; disable interrupts
sti ; enable CPU interrupts
ifndef __NETWARE__
; call __GETDS ; load DS
endif
ifdef __NETWARE__
; push SS ; load DS
; pop DS ; ...
endif
mov EDX,ENV_CW[EBP] ; get control word
not EDX ; flip the mask bits
mov DH,0FFh ; turn on top byte
and EDX,ENV_SW[EBP] ; get status word
; mov ES,ENV_IP+4[EBP] ; get intruction address
mov EDI,ENV_IP[EBP] ; ...
opcode: mov BX,[EDI] ; get opcode
inc EDI ; point to next opcode
cmp BL,0d8h ; check if its the opcode
jb opcode ; ...
cmp BL,0dfh ; ...
ja opcode ; ...
; mov ES,ENV_OP+4[EBP] ; get pointer to operand
mov EDI,ENV_OP[EBP] ; ...
xchg BL,BH ; get opcode in right position
mov CL,FPE_OK ; assume exception to be ignored
_guess ; guess precision exception
test DL,ST_EF_PR ; - check for precision exception
_quif e ; - quit if not precision exception
mov CL,FPE_INEXACT ; - indicate precision exception
_admit ; guess stack under/overflow
test DL,ST_EF_SF ; - check for stack under/overflow
_quif e ; - quit if not stack under/overflow
test DX,ST_C1 ; - check if underflow
_if e ; - if underflow
mov CL,FPE_STACKUNDERFLOW ; - - indicate stack underflow
_else ; - else
mov CL,FPE_STACKOVERFLOW ; - - indicate stack overflow
_endif ; - endif
_admit ; guess invalid operation
test DL,ST_EF_IO ; - check for invalid operation
_quif e ; - quit if not invalid operation
call InvalidOp ; - process invalid operation
_admit ; guess denormal operand
test DL,ST_EF_DO ; - check for denormal operand
_quif e ; - quit if not denormal operand
mov CL,FPE_DENORMAL ; - indicate underflow
_admit ; guess overflow
test DL,ST_EF_OF ; - check for overflow
_quif e ; - quit if not overflow
call KOOverFlow ; - process overflow exception
mov CL,FPE_OVERFLOW ; - set floating point error code
_admit ; guess underflow
test DL,ST_EF_UF ; - check for underflow
_quif e ; - quit if not underflow
mov CL,FPE_UNDERFLOW ; - indicate underflow
_admit ; guess divide by 0
test DL,ST_EF_ZD ; - check for divide by zero
_quif e ; - quit if not divide by zero
call GetInf ; - process divide by zero
mov CL,FPE_ZERODIVIDE ; - indicate divide by zero
_endguess ; endguess
_guess ; guess exception to be handled
cmp CL,FPE_OK ; - check if exception allowed
_quif e ; - quit if exception not allowed
; cmp SaveSS,0 ; - check if already in handler
; _quif ne ; - quit if already in handler
push _STACKLOW ; - save old stack low
mov SaveSS,SS ; - save current stack pointer
mov SaveESP,ESP ; - ...
push DS ; - get new stack pointer
pop SS ; - ...
lea ESP,FPEStk ; - ...
lea EAX,FPEStk-512 ; - set stack low variable
mov _STACKLOW,EAX ; - set stack low variable
movzx EAX,CL ; - set floating point status
call __FPE_exception_ ; - call user's handler
mov SS,SaveSS ; - restore stack pointer
mov ESP,SaveESP ; - ...
pop _STACKLOW ; - restore old stacklow
mov SaveSS,0 ; - indicate handler can be re-entered
_endguess ; endguess
fclex ; clear exceptions that may have
; occurred as a result of handling the
; exception
and word ptr ENV_CW[EBP],0FF72h
fldcw word ptr ENV_CW[EBP] ; enable interrupts
fwait ; ...
add ESP,ENV_SIZE ; clean up stack
pop ES ; restore registers
pop DS ; ...
pop EBP ; ...
pop EDI ; ...
pop ESI ; ...
pop EDX ; ...
pop ECX ; ...
pop EBX ; ...
pop EAX ; ...
iretd ; return from interrupt handler
public "C",__FPEHandlerEnd_
__FPEHandlerEnd_ label byte
endproc __FPEHandler_
; Process invalid operation.
InvalidOp proc near
mov CL,FPE_INVALID ; assume invalid operation
_guess ; guess it's square root
cmp BX,0D9FAh ; - ...
_quif ne ; - quit if it's not that instruction
mov CL,FPE_SQRTNEG ; - indicate sqrt(negative number)
ret ; - return
_endguess ; endguess
_guess ; guess it's square root
cmp BX,0D9F1h ; - ...
_quif ne ; - quit if it's not that instruction
mov CL,FPE_LOGERR ; - indicate sqrt(negative number)
ret ; - return
_endguess ; endguess
_guess ; guess: 'fprem' instruction
cmp BX,0D9F8h ; - check for 'fprem' 10-may-90
_if ne ; - if not 'fprem'
cmp BX,0D9F5h ; - - check for 'fprem1'
_endif ; - endif
_quif ne ; - quit if not 'fprem' or 'fprem1'
mov CL,FPE_MODERR ; - indicate mod(negative number)
_admit ; guess: integer overflow
mov DX,BX ; - save op code
and DX,0310h ; - check for fist/fistp instruction
cmp DX,0310h ; - ...
_quif ne ; - quit if its not that instruction
mov CL,FPE_IOVERFLOW ; - indicate integer overflow
_admit ; guess it's floating point underflow
;; mov DX,BX ; - save op code
and DX,0110h ; - check if fst or fstp instruction
cmp DX,0110h ; - ...
_quif ne ; - quit if it's not that instruction
; Destination is short or long real and source register is an unnormal
; with exponent in range.
fstp st(0) ; - pop old result
fldz ; - load zero
mov DL,BL ; - save op code
and DL,0C0h ; - check the MOD bits of instruction
cmp DL,0C0h ; - ...
_if ne ; - if result to be placed in memory
call Store ; - - store result in memory
_endif ; - endif
test BL,08h ; - check if result to be popped
_if ne ; - if result to be popped
fstp st(0) ; - - pop the result
_endif ; - endif
mov CL,FPE_UNDERFLOW ; - indicate underflow
_admit ; guess it's divide
mov DX,BX ; - save op code
and DX,0130h ; - check for fdiv/fidiv instruction
cmp DX,0030h ; - ...
_quif ne ; - quit if it's not that instruction
mov DX,ENV_TW[EBP] ; - get tag word
mov CL,AH ; - get stack pointer
and CL,38h ; - ...
shr CL,2 ; - ...
ror DX,CL ; - make stack top low order bits
and DL,05h ; - check if top two elements are 0
cmp DL,05h ; - ...
_quif ne ; - quif if they are not 0
mov CL,FPE_ZERODIVIDE ; - indicate divide by zero
_endguess ; endguess
ret
endproc InvalidOp
; Process overflow exception (note that only floating point overflows
; are handled - integer overflows are invalid operations).
KOOverFlow proc near
_guess ; guess: fscale instruction 10-may-90
cmp BX,0D9FDh ; - quit if not 'fscale' instruction
_quif ne ; - ...
_admit ; guess: fst/fstp instruction
mov DX,BX ; - save op code
and DX,0110h ; - check if fst or fstp instruction
cmp DX,0110h ; - ...
_quif ne ; - quit if not an fst/fstp instr.
call GetInf ; - load infinity
mov DL,BL ; - save op code
and DL,0C0h ; - check the MOD bits of instruction
cmp DL,0C0h ; - ...
_if ne ; - if result to be placed in memory
call Store ; - - store infinity
_endif ; - endif
test BL,08h ; - check if result to be popped
_if ne ; - if result to be popped
fstp st(0) ; - - pop result
_endif ; - endif
_admit ; admit arithmetic operation
mov DL,BL ; - save op code
and DL,0C0h ; - check if both operands on stack
cmp DL,0C0h ; - ...
_quif ne ; - quif both operands not on stack
;
; This code handles overflow on the following intructions:
; fxxx ST,ST(i)
; fxxx ST(i),ST where xxx is one of mul,div,sub or add
; fxxxp ST(i),ST
;
lea ESI,TInf ; - load internal infinity
call Load ; - ...
_admit ; admit
;
; This admit block is to handle overflow on the following intructions:
; fxxx short real
; fxxx long real where xxx is one of mul,div,sub or add
;
call GetInf ; - load infinity
_endguess ; endguess
ret ; return
endproc KOOverFlow
; Replace the top element of the stack with the appropriate signed
; infinity.
GetInf proc near
ftst ; get sign of result
fstsw word ptr ENV_OP[EBP]
fstp st(0) ; pop argument off stack (does fwait)
test BH,04h ; check if single or double
_if ne ; if double
fld qword ptr F8Inf ; - load double precision infinity
_else ; else
fld dword ptr F4Inf ; - load single precision infinity
_endif ; endif
test word ptr ENV_OP[EBP],ST_C0
_if ne ; if argument is negative
fchs ; - return negative infinity
_endif ; endif
ret ; return
endproc GetInf
; Replace an element on the stack with internal zero or infinity.
Load proc near
test BH,04h ; check if result is top element
_if e ; if result is not top element
mov DL,0 ; - indicate we are at the top
_else ; else
mov DL,BL ; - get st(i)
and DL,07h ; - . . .
_endif ; endif
push EDX ; save st(i)
_loop ; loop
dec DL ; - decrement counter
_quif l ; - quit if we are at st(i)
fincstp ; - increment stack pointer
_endloop ; endloop
fstp st(0) ; free the stack element
fld tbyte ptr [ESI] ; load internal zero
pop EDX ; get st(i)
_loop ; loop
dec DL ; - decrement counter
_quif l ; - quit if we are at st(i)
fdecstp ; - decrement stack pointer
_endloop ; endloop
ret ; return
endproc Load
; Store the top element of the stack at ES:EDI.
Store proc near
test BH,04h
_if ne ; if double
fst qword ptr ES:[EDI] ; - store as double precision result
_else ; else
fst dword ptr ES:[EDI] ; - store as single precision result
_endif ; endif
ret ; return
endproc Store
endmod
end

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;*****************************************************************************
;*
;* Open Watcom Project
;*
;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
;*
;* ========================================================================
;*
;* This file contains Original Code and/or Modifications of Original
;* Code as defined in and that are subject to the Sybase Open Watcom
;* Public License version 1.0 (the 'License'). You may not use this file
;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
;* provided with the Original Code and Modifications, and is also
;* available at www.sybase.com/developer/opensource.
;*
;* The Original Code and all software distributed under the License are
;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
;* NON-INFRINGEMENT. Please see the License for the specific language
;* governing rights and limitations under the License.
;*
;* ========================================================================
;*
;* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
;* DESCRIBE IT HERE!
;*
;*****************************************************************************
FPE_OK equ 0
FPE_INVALID equ 81h
FPE_DENORMAL equ 82h
FPE_ZERODIVIDE equ 83h
FPE_OVERFLOW equ 84h
FPE_UNDERFLOW equ 85h
FPE_INEXACT equ 86h
FPE_UNEMULATED equ 87h
FPE_SQRTNEG equ 88h
FPE_STACKOVERFLOW equ 8ah
FPE_STACKUNDERFLOW equ 8bh
FPE_EXPLICITGEN equ 8ch
FPE_IOVERFLOW equ 8dh
FPE_LOGERR equ 8eh
FPE_MODERR equ 8fh

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;*****************************************************************************
;*
;* Open Watcom Project
;*
;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
;*
;* ========================================================================
;*
;* This file contains Original Code and/or Modifications of Original
;* Code as defined in and that are subject to the Sybase Open Watcom
;* Public License version 1.0 (the 'License'). You may not use this file
;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
;* provided with the Original Code and Modifications, and is also
;* available at www.sybase.com/developer/opensource.
;*
;* The Original Code and all software distributed under the License are
;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
;* NON-INFRINGEMENT. Please see the License for the specific language
;* governing rights and limitations under the License.
;*
;* ========================================================================
;*
;* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
;* DESCRIBE IT HERE!
;*
;*****************************************************************************
; Define 8087 status word:
; ========================
ST_EF_IO equ 0001h ; invalid operation
ST_EF_DO equ 0002h ; denormalized operand
ST_EF_ZD equ 0004h ; zero divide
ST_EF_OF equ 0008h ; overflow flag
ST_EF_UF equ 0010h ; underflow flag
ST_EF_PR equ 0020h ; precision
ST_EF_SF equ 0040h ; stack under/overflow
ST_EF_ES equ 0080h ; error summary
ST_C0 equ 0100h ; condition code 0
ST_C1 equ 0200h ; condition code 1
ST_C2 equ 0400h ; condition code 2
ST_C3 equ 4000h ; condition code 3
ST_IR equ 0080h ; interrupt request
ST_ST equ 3800h ; stack top
ST_BF equ 8000h ; busy flag
; Define 8087 control word:
; =========================
; Exception masks (1 = exception masked)
CW_IM equ 0001h ; invalid operation
CW_DM equ 0002h ; denormalized operand
CW_ZM equ 0004h ; zero divide
CW_OM equ 0008h ; overflow
CW_UM equ 0010h ; underflow
CW_PM equ 0020h ; precision
; reserved - xxx0 0000 0x00 0000
CW_RESERVE equ 0e040h ; RESERVED
; interrupt enable mask 0000 0000 x000 0000
CW_IEM_EN equ 0000h ; enabled
CW_IEM_DIS equ 0080h ; disabled
CW_PC_MASK equ 0fcffh ; precision control - 0000 00xx 0000 0000
CW_PC_64 equ 0300h ; precision control - 64 bits
CW_PC_53 equ 0200h ; precision control - 53 bits
CW_PC_RES equ 0100h ; precision control - reserved
CW_PC_24 equ 0000h ; precision control - 24 bits
CW_RC_MASK equ 0f3ffh ; round control - 0000 xx00 0000 0000
CW_RC_CHOP equ 0c00h ; round control - chop
CW_RC_UP equ 0800h ; round control - round up
CW_RC_DOWN equ 0400h ; round control - round down
CW_RC_NEAR equ 0000h ; round control - round nearest
; infinity control - 000x 0000 0000 0000
CW_IC_PROJ equ 0000h ; projective
CW_IC_AFF equ 1000h ; affine

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