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finished esc 3: group 4

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1023
This commit is contained in:
Peter Veenstra 2003-05-27 20:12:34 +00:00
parent b6501b0332
commit 1471f0d319
2 changed files with 21 additions and 2 deletions
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16
src/fpu/fpu.cpp
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@ -97,11 +97,23 @@ void FPU_ESC3_Normal(Bitu rm) {
switch (group) {
case 0x04:
switch (sub) {
case 0x03: //FINIT
case 0x00: //FNENI
case 0x01: //FNDIS
LOG(LOG_FPU,LOG_ERROR)("8087 only fpu code used esc 3: group 4: subfuntion :%d",sub);
break;
case 0x02: //FNCLEX FCLEX
FPU_FCLEX();
break;
case 0x03: //FNINIT FINIT
FPU_FINIT();
break;
case 0x04: //FNSETPM
case 0x05: //FRSTPM
LOG(LOG_FPU,LOG_ERROR)("80267 protected mode (un)set. Nothing done");
FPU_FNOP();
break;
default:
LOG(LOG_FPU,LOG_WARN)("ESC 3:Unhandled group %d subfunction %d",group,sub);
E_Exit("ESC 3:ILLEGAL OPCODE group %d subfunction %d",group,sub);
}
break;
default:

7
src/fpu/fpu_instructions.h
View file

@ -28,4 +28,11 @@ static void FPU_FINIT(void) {
fpu.tags[5]=TAG_Empty;
fpu.tags[6]=TAG_Empty;
fpu.tags[7]=TAG_Empty;
}
static void FPU_FCLEX(void){
fpu.sw&=0x7f00; //should clear exceptions
};
static void FPU_FNOP(void){
return;
}