static void ppc_opc_invalid()
{
#if 0
if (gCPU.pc == gPromOSIEntry && gCPU.current_opc == PROM_MAGIC_OPCODE) {
call_prom_osi();
return;
}
if (gCPU.current_opc == 0x00333301) {
// memset(r3, r4, r5)
uint32 dest = gCPU.gpr[3];
uint32 c = gCPU.gpr[4];
uint32 size = gCPU.gpr[5];
if (dest & 0xfff) {
byte *dst;
ppc_direct_effective_memory_handle(dest, dst);
uint32 a = 4096 - (dest & 0xfff);
memset(dst, c, a);
size -= a;
dest += a;
}
while (size >= 4096) {
byte *dst;
ppc_direct_effective_memory_handle(dest, dst);
memset(dst, c, 4096);
dest += 4096;
size -= 4096;
}
if (size) {
byte *dst;
ppc_direct_effective_memory_handle(dest, dst);
memset(dst, c, size);
}
gCPU.pc = gCPU.npc;
return;
}
if (gCPU.current_opc == 0x00333302) {
// memcpy
uint32 dest = gCPU.gpr[3];
uint32 src = gCPU.gpr[4];
uint32 size = gCPU.gpr[5];
byte *d, *s;
ppc_direct_effective_memory_handle(dest, d);
ppc_direct_effective_memory_handle(src, s);
while (size--) {
if (!(dest & 0xfff)) ppc_direct_effective_memory_handle(dest, d);
if (!(src & 0xfff)) ppc_direct_effective_memory_handle(src, s);
*d = *s;
src++; dest++; d++; s++;
}
gCPU.pc = gCPU.npc;
return;
}
#endif
ht_printf("[PPC/DEC] Bad opcode: %08x (%u:%u) PC=%08x\n",
gCPU.current_opc, PPC_OPC_MAIN(gCPU.current_opc),
PPC_OPC_EXT(gCPU.current_opc), gCPU.pc);
SINGLESTEP("unknown instruction\n");
}
/**
* @brief The main API of decode!
*
* @param opc
*
* @return
*/
ppc_opc_func_t* ppc_get_opc_func(uint32_t opc)
{
uint32 mainopc = PPC_OPC_MAIN(opc);
if(mainopc == 31)
return ppc_opc_group_2(opc);
else if(mainopc == 19)
return ppc_opc_group_1(opc);
else if(mainopc == 59)
return ppc_opc_group_f1(opc);
else if(mainopc == 63)
return ppc_opc_group_f2(opc);
else{
debug(DEBUG_DEC, "In %s,mainopc=%d\n", __FUNCTION__, mainopc);
return ppc_opc_table_main[mainopc];
}
}
void FASTCALL ppc_exec_opc()
{
uint32 mainopc = PPC_OPC_MAIN(gCPU.current_opc);
ppc_opc_table_main[mainopc]();
}
