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Fixed >32 bit shifts on 808x CPUs. Fixes Titus the Fox.

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This commit is contained in:
SarahW 2017-11-05 17:17:58 +00:00
commit bb4fbdd9c2
1 changed files with 33 additions and 9 deletions
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42
src/808x.c
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@ -2690,9 +2690,17 @@ void execx86(int cycs)
cycles-=((cpu_mod==3)?8:28);
break;
case 0x20: case 0x30: /*SHL b,CL*/
if ((temp<<(c-1))&0x80) flags|=C_FLAG;
else flags&=~C_FLAG;
temp<<=c;
if (c > 8)
{
temp = 0;
flags &= ~C_FLAG;
}
else
{
if ((temp<<(c-1))&0x80) flags|=C_FLAG;
else flags&=~C_FLAG;
temp<<=c;
}
seteab(temp);
setznp8(temp);
cycles-=(c*4);
@ -2700,9 +2708,17 @@ void execx86(int cycs)
flags|=A_FLAG;
break;
case 0x28: /*SHR b,CL*/
if ((temp>>(c-1))&1) flags|=C_FLAG;
else flags&=~C_FLAG;
temp>>=c;
if (c > 8)
{
temp = 0;
flags &= ~C_FLAG;
}
else
{
if ((temp>>(c-1))&1) flags|=C_FLAG;
else flags&=~C_FLAG;
temp>>=c;
}
seteab(temp);
setznp8(temp);
cycles-=(c*4);
@ -2827,9 +2843,17 @@ void execx86(int cycs)
break;
case 0x28: /*SHR w,CL*/
if ((tempw>>(c-1))&1) flags|=C_FLAG;
else flags&=~C_FLAG;
tempw>>=c;
if (c > 16)
{
tempw = 0;
flags &= ~C_FLAG;
}
else
{
if ((tempw>>(c-1))&1) flags|=C_FLAG;
else flags&=~C_FLAG;
tempw>>=c;
}
seteaw(tempw);
setznp16(tempw);
cycles-=(c*4);