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Various VB specific opcodes, nw

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This commit is contained in:
Angelo Salese 2012-08-16 04:05:48 +00:00
parent 452b54e423
commit 89aa58aed6
1 changed files with 37 additions and 0 deletions
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37
src/emu/cpu/v810/v810.c
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@ -927,6 +927,38 @@ static void opCVTW(v810_state *cpustate,UINT32 op)
SETREG(cpustate,GET2,f2u(val1));
}
static void opMPYHW(v810_state *cpustate,UINT32 op)
{
int val1=(GETREG(cpustate,GET1) & 0xffff);
int val2=(GETREG(cpustate,GET2) & 0xffff);
SET_OV(0);
val2*=val1;
SET_Z((val2==0.0)?1:0);
SET_S((val2<0.0)?1:0);
SETREG(cpustate,GET2,val2);
}
static void opXB(v810_state *cpustate,UINT32 op)
{
int val=GETREG(cpustate,GET2);
SET_OV(0);
val = (val & 0xffff0000) | ((val & 0xff) << 8) | ((val & 0xff00) >> 8);
SET_Z((val==0.0)?1:0);
SET_S((val<0.0)?1:0);
SETREG(cpustate,GET2,val);
}
static void opXH(v810_state *cpustate,UINT32 op)
{
int val=GETREG(cpustate,GET2);
SET_OV(0);
val = ((val & 0xffff0000)>>16) | ((val & 0xffff)<<16);
SET_Z((val==0.0)?1:0);
SET_S((val<0.0)?1:0);
SETREG(cpustate,GET2,val);
}
static UINT32 opFpoint(v810_state *cpustate,UINT32 op)
{
UINT32 tmp=R_OP(cpustate,cpustate->PC);
@ -940,7 +972,12 @@ static UINT32 opFpoint(v810_state *cpustate,UINT32 op)
case 0x5: opSUBF(cpustate,op);break;
case 0x6: opMULF(cpustate,op);break;
case 0x7: opDIVF(cpustate,op);break;
case 0x8: opXB(cpustate,op); break; // *
case 0x9: opXH(cpustate,op); break; // *
case 0xb: opTRNC(cpustate,op);break;
case 0xc: opMPYHW(cpustate,op); break; // *
// * <- Virtual Boy specific?
default: printf("Floating point %02x\n",(tmp&0xfc00) >> 10);break;
}
return clkIF+1;
}