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Added 8088/8086 instruction aliases. Patch from Battler.

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This commit is contained in:
TomW 2016-01-04 20:47:28 +00:00
commit 4a0ece4e75
1 changed files with 21 additions and 0 deletions
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21
src/808x.c
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@ -1682,66 +1682,79 @@ void execx86(int cycs)
break;
case 0x60: /*JO alias*/
case 0x70: /*JO*/
offset=(int8_t)FETCH();
if (flags&V_FLAG) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x61: /*JNO alias*/
case 0x71: /*JNO*/
offset=(int8_t)FETCH();
if (!(flags&V_FLAG)) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x62: /*JB alias*/
case 0x72: /*JB*/
offset=(int8_t)FETCH();
if (flags&C_FLAG) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x63: /*JNB alias*/
case 0x73: /*JNB*/
offset=(int8_t)FETCH();
if (!(flags&C_FLAG)) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x64: /*JE alias*/
case 0x74: /*JE*/
offset=(int8_t)FETCH();
if (flags&Z_FLAG) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x65: /*JNE alias*/
case 0x75: /*JNE*/
offset=(int8_t)FETCH();
cycles-=4;
if (!(flags&Z_FLAG)) { pc+=offset; cycles-=12; FETCHCLEAR(); }
break;
case 0x66: /*JBE alias*/
case 0x76: /*JBE*/
offset=(int8_t)FETCH();
if (flags&(C_FLAG|Z_FLAG)) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x67: /*JNBE alias*/
case 0x77: /*JNBE*/
offset=(int8_t)FETCH();
if (!(flags&(C_FLAG|Z_FLAG))) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x68: /*JS alias*/
case 0x78: /*JS*/
offset=(int8_t)FETCH();
if (flags&N_FLAG) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x69: /*JNS alias*/
case 0x79: /*JNS*/
offset=(int8_t)FETCH();
if (!(flags&N_FLAG)) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x6A: /*JP alias*/
case 0x7A: /*JP*/
offset=(int8_t)FETCH();
if (flags&P_FLAG) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x6B: /*JNP alias*/
case 0x7B: /*JNP*/
offset=(int8_t)FETCH();
if (!(flags&P_FLAG)) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x6C: /*JL alias*/
case 0x7C: /*JL*/
offset=(int8_t)FETCH();
temp=(flags&N_FLAG)?1:0;
@ -1749,6 +1762,7 @@ void execx86(int cycs)
if (temp!=temp2) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x6D: /*JNL alias*/
case 0x7D: /*JNL*/
offset=(int8_t)FETCH();
temp=(flags&N_FLAG)?1:0;
@ -1756,6 +1770,7 @@ void execx86(int cycs)
if (temp==temp2) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x6E: /*JLE alias*/
case 0x7E: /*JLE*/
offset=(int8_t)FETCH();
temp=(flags&N_FLAG)?1:0;
@ -1763,6 +1778,7 @@ void execx86(int cycs)
if ((flags&Z_FLAG) || (temp!=temp2)) { pc+=offset; cycles-=12; FETCHCLEAR(); }
cycles-=4;
break;
case 0x6F: /*JNLE alias*/
case 0x7F: /*JNLE*/
offset=(int8_t)FETCH();
temp=(flags&N_FLAG)?1:0;
@ -2290,6 +2306,7 @@ void execx86(int cycs)
cycles-=4;
break;
case 0xC0: /*RET alias*/
case 0xC2: /*RET*/
tempw=getword();
if (ssegs) ss=oldss;
@ -2300,6 +2317,7 @@ void execx86(int cycs)
cycles-=24;
FETCHCLEAR();
break;
case 0xC1: /*RET alias*/
case 0xC3: /*RET*/
if (ssegs) ss=oldss;
pc=readmemw(ss,SP);
@ -2337,6 +2355,7 @@ void execx86(int cycs)
cycles-=((mod==3)?4:14);
break;
case 0xC8: /*RETF alias*/
case 0xCA: /*RETF*/
tempw=getword();
if (ssegs) ss=oldss;
@ -2348,6 +2367,7 @@ void execx86(int cycs)
cycles-=33;
FETCHCLEAR();
break;
case 0xC9: /*RETF alias*/
case 0xCB: /*RETF*/
if (ssegs) ss=oldss;
pc=readmemw(ss,SP);
@ -2971,6 +2991,7 @@ void execx86(int cycs)
break;
case 0xF0: /*LOCK*/
case 0xF1: /*LOCK alias*/
cycles-=4;
break;