valter/dosbox-staging
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Added some instructions and fixed a very annoying bug with wrong fetched byte size.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@393
This commit is contained in:
Sjoerd van der Berg 2002-10-21 22:09:19 +00:00
parent a835e6e328
commit 973be7b16f
1 changed files with 49 additions and 14 deletions
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63
src/cpu/core_16/prefix_66.h
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@ -24,7 +24,7 @@ switch(Fetchb()) {
RMGdEd(ADDD);break;
case 0x05: /* ADD EAX,Id */
EAXId(ADDD);break;
case 0x09: /* OR Ew,Gw */
case 0x09: /* OR Ed,Gd */
RMEdGd(ORD);break;
case 0x0b: /* OR Gd,Ed */
RMGdEd(ORD);break;
@ -199,7 +199,7 @@ switch(Fetchb()) {
case 0x38:CMPD(*eard,id,LoadRd,SaveRd);break;
}
} else {
GetEAa;Bit32u id=Fetchb();
GetEAa;Bit32u id=Fetchd();
switch (rm & 0x38) {
case 0x00:ADDD(eaa,id,LoadMd,SaveMd);break;
case 0x08: ORD(eaa,id,LoadMd,SaveMd);break;
@ -245,14 +245,13 @@ switch(Fetchb()) {
break;
case 0x85: /* TEST Ed,Gd */
RMEdGd(TESTD);break;
case 0x8f: /* POP Ed */
{
GetRM;
if (rm >= 0xc0 ) {GetEArd;*eard=Pop_32();}
else {GetEAa;SaveMd(eaa,Pop_32());}
case 0x87: /* XCHG Ev,Gv */
{
GetRMrd;Bit32u oldrmrd=*rmrd;
if (rm >= 0xc0 ) {GetEArd;*rmrd=*eard;*eard=oldrmrd;}
else {GetEAa;*rmrd=LoadMd(eaa);SaveMd(eaa,oldrmrd);}
break;
}
case 0x89: /* MOV Ed,Gd */
{
GetRMrd;
@ -260,10 +259,6 @@ switch(Fetchb()) {
else {GetEAa;SaveMd(eaa,*rmrd);}
break;
}
case 0x99: /* CDQ */
if (reg_eax & 0x80000000) reg_edx=0xffffffff;
else reg_edx=0;
break;
case 0x8b: /* MOV Gd,Ed */
{
GetRMrd;
@ -274,6 +269,42 @@ switch(Fetchb()) {
case 0x8c:
LOG_WARN("CPU:66:8c looped back");
break;
case 0x8f: /* POP Ed */
{
GetRM;
if (rm >= 0xc0 ) {GetEArd;*eard=Pop_32();}
else {GetEAa;SaveMd(eaa,Pop_32());}
break;
}
case 0x90: /* NOP */
break;
case 0x91: /* XCHG CX,AX */
{ Bit32u temp=reg_eax;reg_eax=reg_ecx;reg_ecx=temp; }
break;
case 0x92: /* XCHG DX,AX */
{ Bit32u temp=reg_eax;reg_eax=reg_edx;reg_edx=temp; }
break;
case 0x93: /* XCHG BX,AX */
{ Bit32u temp=reg_eax;reg_eax=reg_ebx;reg_ebx=temp; }
break;
case 0x94: /* XCHG SP,AX */
{ Bit32u temp=reg_eax;reg_eax=reg_esp;reg_esp=temp; }
break;
case 0x95: /* XCHG BP,AX */
{ Bit32u temp=reg_eax;reg_eax=reg_ebp;reg_ebp=temp; }
break;
case 0x96: /* XCHG SI,AX */
{ Bit32u temp=reg_eax;reg_eax=reg_esi;reg_esi=temp; }
break;
case 0x97: /* XCHG DI,AX */
{ Bit32u temp=reg_eax;reg_eax=reg_edi;reg_edi=temp; }
break;
case 0x98: /* CWD */
reg_eax=(Bit16s)reg_ax;break;
case 0x99: /* CDQ */
if (reg_eax & 0x80000000) reg_edx=0xffffffff;
else reg_edx=0;
break;
case 0x9c: /* PUSHFD */
{
Bit32u pflags=
@ -309,6 +340,9 @@ switch(Fetchb()) {
else { reg_si+=4;reg_di+=4;}
}
break;
case 0xa9: /* TEST EAX,Id */
EAXId(TESTD);
break;
case 0xab: /* STOSD */
{
stringDI;
@ -362,6 +396,7 @@ switch(Fetchb()) {
GRP2D(1);break;
case 0xd3: /* GRP2 Ed,CL */
GRP2D(reg_cl);break;
case 0xf7: /* GRP3 Ed(,Id) */
{
union { Bit64u u;Bit64s s;} temp;
@ -454,12 +489,12 @@ switch(Fetchb()) {
{
GetRM;
switch (rm & 0x38) {
case 0x00: /* INC Ew */
case 0x00: /* INC Ed */
flags.cf=get_CF();flags.type=t_INCd;
if (rm >= 0xc0 ) {GetEArd;flags.result.d=*eard+=1;}
else {GetEAa;flags.result.d=LoadMd(eaa)+1;SaveMd(eaa,flags.result.d);}
break;
case 0x08: /* DEC Ew */
case 0x08: /* DEC Ed */
flags.cf=get_CF();flags.type=t_DECd;
if (rm >= 0xc0 ) {GetEArd;flags.result.d=*eard-=1;}
else {GetEAa;flags.result.d=LoadMd(eaa)-1;SaveMd(eaa,flags.result.d);}