void EncodeCond( oc_jcond *oc ) {
axp_ins opcode;
int floating;
floating = 0;
if( oc->hdr.class & ATTR_FLOAT ) {
floating = 1;
}
opcode = BranchOpcodes[ oc->cond - FIRST_COMPARISON ][ floating ];
doBranch( opcode, oc->handle, oc->index );
}
void EncodeCall( oc_handle *oc ) {
doBranch( 0x34, oc->handle, AXP_RETURN_ADDR );
}
void execute(pruCPU *cpu) {
aluInstruction inst;
fmt2InstructionHeader fmt2Hdr;
while(1) {
int didBranch = 0;
cgc_memcpy(&inst, (aluInstruction *)&cpu->code[cpu->pc], 4);
switch(inst.opFmt) {
case 0b000:
switch(inst.aluOp) {
case ADD:
doAdd(cpu, inst);
break;
case ADC:
doAdc(cpu, inst);
break;
case SUB:
doSub(cpu, inst);
break;
case SUC:
doSuc(cpu, inst);
break;
case LSL:
doLsl(cpu, inst);
break;
case LSR:
doLsr(cpu, inst);
break;
case RSB:
doRsb(cpu, inst);
break;
case RSC:
doRsc(cpu, inst);
break;
case AND:
doAnd(cpu, inst);
break;
case OR:
doOr(cpu, inst);
break;
case XOR:
doXor(cpu, inst);
break;
case NOT:
doNot(cpu, inst);
break;
case MIN:
doMin(cpu, inst);
break;
case MAX:
doMax(cpu, inst);
break;
case CLR:
doClr(cpu, inst);
break;
case SET:
doSet(cpu, inst);
break;
}
break;
case 0b001:
cgc_memcpy(&fmt2Hdr, &inst, sizeof(fmt2Hdr));
switch(fmt2Hdr.subOp)
{
case JMP:
case JAL:
;
fmt2BranchInstruction fmt2Branch;
cgc_memcpy(&fmt2Branch, &inst, 4);
doBranch(cpu, fmt2Branch);
didBranch = 1;
break;
case LDI:
;
fmt2LdiInstruction fmt2Ldi;
cgc_memcpy(&fmt2Ldi, &inst, 4);
doLdi(cpu, fmt2Ldi);
break;
case LMBD:
;
fmt2LmbdInstruction fmt2Lmbd;
cgc_memcpy(&fmt2Lmbd, &inst, 4);
doLmbd(cpu, fmt2Lmbd);
break;
case HALT:
return;
case SCAN:
;
fmt2ScanInstruction fmt2Scan;
cgc_memcpy(&fmt2Scan, &inst, 4);
doScan(cpu, fmt2Scan);
break;
case SLP:
case RESERVED_1:
case RESERVED_2:
case RESERVED_3:
case RESERVED_4:
case RESERVED_5:
case RESERVED_6:
case RESERVED_7:
case RESERVED_8:
case RESERVED_9:
return;
}
break;
case 0b11:
;
fmtQatbInstruction qatbInstruction;
cgc_memcpy(&qatbInstruction, &inst, 4);
doQATB(cpu, qatbInstruction);
default:
return;
}
if(didBranch == 0)
cpu->pc++;
cpu->numExecuted++;
if(cpu->numExecuted >= MAX_INSNS)
return;
}
}
void EncodeJump( oc_handle *oc ) {
doBranch( 0x30, oc->handle, AXP_ZERO_SINK );
}
static COLDFIRE_DISPATCH_FN(morphBCC) {doBranch(info->instruction, info->thisPC, False, info->instrSize, info->type, coldfire);}
