mirror of
https://github.com/libretro/Play-.git
synced 2024-12-12 11:05:36 +00:00
112 lines
2.5 KiB
C++
112 lines
2.5 KiB
C++
#include <assert.h>
|
|
#include <stddef.h>
|
|
#include "MIPSInstructionFactory.h"
|
|
#include "MIPS.h"
|
|
#include "PtrMacro.h"
|
|
#include "offsetof_def.h"
|
|
|
|
CMIPSInstructionFactory::CMIPSInstructionFactory(MIPS_REGSIZE nRegSize)
|
|
: m_pCtx(NULL)
|
|
, m_codeGen(NULL)
|
|
, m_nAddress(0)
|
|
, m_nOpcode(0)
|
|
, m_regSize(nRegSize)
|
|
{
|
|
|
|
}
|
|
|
|
CMIPSInstructionFactory::~CMIPSInstructionFactory()
|
|
{
|
|
|
|
}
|
|
|
|
void CMIPSInstructionFactory::SetupQuickVariables(uint32 nAddress, CMipsJitter* codeGen, CMIPS* pCtx)
|
|
{
|
|
m_pCtx = pCtx;
|
|
m_codeGen = codeGen;
|
|
m_nAddress = nAddress;
|
|
|
|
m_nOpcode = m_pCtx->m_pMemoryMap->GetInstruction(m_nAddress);
|
|
}
|
|
|
|
void CMIPSInstructionFactory::ComputeMemAccessAddr()
|
|
{
|
|
uint8 nRS = (uint8) ((m_nOpcode >> 21) & 0x001F);
|
|
uint16 nImmediate = (uint16)((m_nOpcode >> 0) & 0xFFFF);
|
|
|
|
if(m_pCtx->m_pAddrTranslator == &CMIPS::TranslateAddress64)
|
|
{
|
|
m_codeGen->PushRel(offsetof(CMIPS, m_State.nGPR[nRS].nV[0]));
|
|
if(nImmediate != 0)
|
|
{
|
|
m_codeGen->PushCst((int16)nImmediate);
|
|
m_codeGen->Add();
|
|
}
|
|
m_codeGen->PushCst(0x1FFFFFFF);
|
|
m_codeGen->And();
|
|
}
|
|
else
|
|
{
|
|
//TODO: Compute the complete 64-bit address
|
|
|
|
//Translate the address
|
|
|
|
//Push context
|
|
m_codeGen->PushCtx();
|
|
|
|
//Push low part of address
|
|
m_codeGen->PushRel(offsetof(CMIPS, m_State.nGPR[nRS].nV[0]));
|
|
if(nImmediate != 0)
|
|
{
|
|
m_codeGen->PushCst((int16)nImmediate);
|
|
m_codeGen->Add();
|
|
}
|
|
|
|
//Call
|
|
m_codeGen->Call(reinterpret_cast<void*>(m_pCtx->m_pAddrTranslator), 2, true);
|
|
}
|
|
}
|
|
|
|
void CMIPSInstructionFactory::Branch(Jitter::CONDITION condition)
|
|
{
|
|
uint16 nImmediate = (uint16)(m_nOpcode & 0xFFFF);
|
|
|
|
m_codeGen->PushCst(MIPS_INVALID_PC);
|
|
m_codeGen->PullRel(offsetof(CMIPS, m_State.nDelayedJumpAddr));
|
|
|
|
m_codeGen->BeginIf(condition);
|
|
{
|
|
m_codeGen->PushCst((m_nAddress + 4) + CMIPS::GetBranch(nImmediate));
|
|
m_codeGen->PullRel(offsetof(CMIPS, m_State.nDelayedJumpAddr));
|
|
}
|
|
m_codeGen->EndIf();
|
|
}
|
|
|
|
void CMIPSInstructionFactory::BranchLikely(Jitter::CONDITION condition)
|
|
{
|
|
uint16 nImmediate = (uint16)(m_nOpcode & 0xFFFF);
|
|
|
|
m_codeGen->PushCst(MIPS_INVALID_PC);
|
|
m_codeGen->PullRel(offsetof(CMIPS, m_State.nDelayedJumpAddr));
|
|
|
|
m_codeGen->BeginIf(condition);
|
|
{
|
|
m_codeGen->PushCst((m_nAddress + 4) + CMIPS::GetBranch(nImmediate));
|
|
m_codeGen->PullRel(offsetof(CMIPS, m_State.nDelayedJumpAddr));
|
|
}
|
|
m_codeGen->Else();
|
|
{
|
|
m_codeGen->PushCst(m_nAddress + 8);
|
|
m_codeGen->PullRel(offsetof(CMIPS, m_State.nPC));
|
|
m_codeGen->Goto(m_codeGen->GetFinalBlockLabel());
|
|
}
|
|
m_codeGen->EndIf();
|
|
}
|
|
|
|
void CMIPSInstructionFactory::Illegal()
|
|
{
|
|
#ifdef _DEBUG
|
|
throw std::runtime_error("Illegal instruction.");
|
|
#endif
|
|
}
|