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change functionality of f68:15, f68:18

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git-svn-id: svn://kolibrios.org@1075 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Galkov 2009-05-22 10:35:21 +00:00
parent 8d75380caf
commit d8f8c0faad
2 changed files with 28 additions and 7 deletions
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18
programs/develop/open watcom/trunk/clib/fpu/fpe387.asm
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@ -42,6 +42,7 @@ include mdef.inc
datasegment
Save87 dd 0
OldMask dd 0
enddata
@ -56,13 +57,17 @@ defp __Init_FPE_handler
push EAX ; save registers
push EBX ; ...
push ECX ; ...
push EDX ; ...
mov EAX, 68
mov EBX, 15
mov EDX, 10000h ; 1 shl 16 - #MF
lea ECX, __FPE2Handler_
int 40h ; set new #FPE handler
int 40h ; set new exception handler
mov Save87, EAX ; save old handler
mov OldMask,EBX ; save old mask
pop EDX ; ...
pop ECX ; ...
pop EBX ; ...
pop EAX ; ...
@ -78,6 +83,7 @@ defp __Fini_FPE_handler
_endif ; endif
push EAX ; save registers
push EBX ; ...
; ECX ????
push EDX ; ...
sub ESP,4 ; allocate space for control word
fstcw word ptr [ESP] ; get control word
@ -89,10 +95,12 @@ defp __Fini_FPE_handler
mov EAX, 68
mov EBX, 15
mov ECX, dword ptr Save87
int 40h ; set new #FPE handler
mov ECX, dword ptr Save87 ; restore handler
mov EDX, dword ptr OldMask ; restore mask
int 40h ; set new ecxeption handler
pop EDX ; ...
; ECX ????
pop EBX ; ...
pop EAX ; ...
ret

17
programs/develop/open watcom/trunk/clib/fpu/fpeinth.asm
View File

@ -60,7 +60,7 @@ xdefp __FPEHandler_
defp __FPEHandler_
public __FPE2Handler_
__FPE2Handler_ label byte
__FPE2Handler_ label byte
push EAX ; save regs
push EBX ; ...
@ -71,6 +71,9 @@ __FPE2Handler_ label byte
push EBP ; ...
sub ESP,ENV_SIZE ; make room for environment information
mov EBP,ESP ; point to buffer for 80x87 environment
; Now EXC_NUM is located in [EBP+ENV_SIZE+32]
; but it isn't necessary to testing EXC_NUM,
; because only #MF is unmasked now
fnstenv [EBP] ; get 80x87 environment
fwait ; wait for 80x87
mov EDX,ENV_CW[EBP] ; get control word
@ -124,6 +127,15 @@ opcode:
call GetInf ; - process divide by zero
mov CL,FPE_ZERODIVIDE ; - indicate divide by zero
_endguess ; endguess
; More correctly to rise this mask bit - is on end of __FPE_exception_
; but it may not returned at all...
push ECX
mov EAX, 68
mov EBX, 18 ;
mov ECX, 16 ; #MF
mov EDX, 1 ; rise activity
int 40h ; change state of signal activity
pop ECX
_guess ; guess exception to be handled
cmp CL,FPE_OK ; - check if exception allowed
_quif e ; - quit if exception not allowed
@ -144,7 +156,8 @@ opcode:
pop ECX ; ...
pop EBX ; ...
pop EAX ; ...
ret ; return from interrupt handler
ret 4 ; return from interrupt handler
; with removing EXC_NUM
endproc __FPEHandler_