mirror of
https://github.com/jpd002/Play-.git
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a6e12114d7
PsfPlayer bios memory ownership fixes. git-svn-id: http://svn.purei.org/purei/trunk@490 b36208d7-6611-0410-8bec-b1987f11c4a2
104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
#include <assert.h>
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#include <stddef.h>
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#include "MIPSInstructionFactory.h"
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#include "CodeGen.h"
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#include "MIPS.h"
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#include "PtrMacro.h"
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#include "offsetof_def.h"
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using namespace std;
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CMIPSInstructionFactory::CMIPSInstructionFactory(MIPS_REGSIZE nRegSize) :
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m_pCtx(NULL),
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m_codeGen(NULL),
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m_nAddress(0),
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m_nOpcode(0),
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m_regSize(nRegSize)
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{
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}
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CMIPSInstructionFactory::~CMIPSInstructionFactory()
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{
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}
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void CMIPSInstructionFactory::SetupQuickVariables(uint32 nAddress, CCodeGen* codeGen, CMIPS* pCtx)
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{
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m_pCtx = pCtx;
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m_codeGen = codeGen;
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m_nAddress = nAddress;
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m_nOpcode = m_pCtx->m_pMemoryMap->GetInstruction(m_nAddress);
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}
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void CMIPSInstructionFactory::ComputeMemAccessAddr()
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{
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uint8 nRS;
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uint16 nImmediate;
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nRS = (uint8) ((m_nOpcode >> 21) & 0x001F);
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nImmediate = (uint16)((m_nOpcode >> 0) & 0xFFFF);
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//TODO: Compute the complete 64-bit address
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//Translate the address
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//Push context
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m_codeGen->PushRef(m_pCtx);
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//Push high part
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m_codeGen->PushRel(offsetof(CMIPS, m_State.nGPR[nRS].nV[1]));
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//Push low part of address
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m_codeGen->PushRel(offsetof(CMIPS, m_State.nGPR[nRS].nV[0]));
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if(nImmediate != 0)
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{
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m_codeGen->PushCst((int16)nImmediate);
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m_codeGen->Add();
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}
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//Call
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m_codeGen->Call(reinterpret_cast<void*>(m_pCtx->m_pAddrTranslator), 3, true);
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}
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void CMIPSInstructionFactory::Branch(bool nCondition)
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{
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uint16 nImmediate = (uint16)(m_nOpcode & 0xFFFF);
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m_codeGen->PushCst(MIPS_INVALID_PC);
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m_codeGen->PullRel(offsetof(CMIPS, m_State.nDelayedJumpAddr));
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m_codeGen->BeginIf(nCondition);
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{
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m_codeGen->PushCst((m_nAddress + 4) + CMIPS::GetBranch(nImmediate));
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m_codeGen->PullRel(offsetof(CMIPS, m_State.nDelayedJumpAddr));
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}
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m_codeGen->EndIf();
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}
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void CMIPSInstructionFactory::BranchLikely(bool conditionValue)
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{
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uint16 nImmediate = (uint16)(m_nOpcode & 0xFFFF);
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m_codeGen->PushCst(MIPS_INVALID_PC);
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m_codeGen->PullRel(offsetof(CMIPS, m_State.nDelayedJumpAddr));
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m_codeGen->BeginIfElse(conditionValue);
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{
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m_codeGen->PushCst((m_nAddress + 4) + CMIPS::GetBranch(nImmediate));
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m_codeGen->PullRel(offsetof(CMIPS, m_State.nDelayedJumpAddr));
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}
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m_codeGen->BeginIfElseAlt();
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{
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m_codeGen->PushCst(m_nAddress + 8);
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m_codeGen->PullRel(offsetof(CMIPS, m_State.nPC));
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m_codeGen->EndQuota();
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}
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m_codeGen->EndIf();
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}
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void CMIPSInstructionFactory::Illegal()
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{
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throw runtime_error("Illegal instruction.");
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}
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