mirror of
https://github.com/hrydgard/ppsspp.git
synced 2025-04-02 11:01:50 -04:00
a9d0390426
This makes jit slightly slower for syscalls, but it's minor and makes sure jit and interpreter timing are determistically the same.
504 lines
12 KiB
C++
504 lines
12 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include "../../HLE/HLE.h"
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#include "../../Host.h"
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#include "../MIPS.h"
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#include "../MIPSCodeUtils.h"
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#include "../MIPSAnalyst.h"
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#include "../MIPSTables.h"
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#include "Jit.h"
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#include "RegCache.h"
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#include "JitCache.h"
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#define _RS ((op>>21) & 0x1F)
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#define _RT ((op>>16) & 0x1F)
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#define _RD ((op>>11) & 0x1F)
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#define _FS ((op>>11) & 0x1F)
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#define _FT ((op>>16) & 0x1F)
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#define _FD ((op>>6 ) & 0x1F)
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#define _POS ((op>>6 ) & 0x1F)
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#define _SIZE ((op>>11 ) & 0x1F)
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#define LOOPOPTIMIZATION 0
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using namespace MIPSAnalyst;
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// NOTE: Can't use CONDITIONAL_DISABLE in this file, branches are so special
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// that they cannot be interpreted in the context of the Jit.
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// But we can at least log and compare.
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// #define DO_CONDITIONAL_LOG 1
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#define DO_CONDITIONAL_LOG 0
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#if DO_CONDITIONAL_LOG
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#define CONDITIONAL_LOG BranchLog(op);
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#define CONDITIONAL_LOG_EXIT(addr) BranchLogExit(op, addr, false);
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#define CONDITIONAL_LOG_EXIT_EAX() BranchLogExit(op, 0, true);
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#else
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#define CONDITIONAL_LOG ;
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#define CONDITIONAL_LOG_EXIT(addr) ;
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#define CONDITIONAL_LOG_EXIT_EAX() ;
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#endif
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namespace MIPSComp
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{
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static u32 intBranchExit;
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static u32 jitBranchExit;
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static void JitBranchLog(u32 op, u32 pc)
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{
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currentMIPS->pc = pc;
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currentMIPS->inDelaySlot = false;
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MIPSInterpretFunc func = MIPSGetInterpretFunc(op);
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u32 info = MIPSGetInfo(op);
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func(op);
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// Branch taken, use nextPC.
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if (currentMIPS->inDelaySlot)
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intBranchExit = currentMIPS->nextPC;
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else
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{
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// Branch not taken, likely delay slot skipped.
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if (info & LIKELY)
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intBranchExit = currentMIPS->pc;
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// Branch not taken, so increment over delay slot.
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else
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intBranchExit = currentMIPS->pc + 4;
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}
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currentMIPS->pc = pc;
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currentMIPS->inDelaySlot = false;
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}
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static void JitBranchLogMismatch(u32 op, u32 pc)
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{
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char temp[256];
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MIPSDisAsm(op, pc, temp, true);
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ERROR_LOG(JIT, "Bad jump: %s - int:%08x jit:%08x", temp, intBranchExit, jitBranchExit);
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Core_EnableStepping(true);
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host->SetDebugMode(true);
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}
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void Jit::BranchLog(u32 op)
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{
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FlushAll();
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ABI_CallFunctionCC(thunks.ProtectFunction((void *) &JitBranchLog, 2), op, js.compilerPC);
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}
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void Jit::BranchLogExit(u32 op, u32 dest, bool useEAX)
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{
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OpArg destArg = useEAX ? R(EAX) : Imm32(dest);
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CMP(32, M((void *) &intBranchExit), destArg);
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FixupBranch skip = J_CC(CC_E);
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MOV(32, M((void *) &jitBranchExit), destArg);
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ABI_CallFunctionCC(thunks.ProtectFunction((void *) &JitBranchLogMismatch, 2), op, js.compilerPC);
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// Restore EAX, we probably ruined it.
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if (useEAX)
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MOV(32, R(EAX), M((void *) &jitBranchExit));
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SetJumpTarget(skip);
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}
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void Jit::BranchRSRTComp(u32 op, Gen::CCFlags cc, bool likely)
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{
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CONDITIONAL_LOG;
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if (js.inDelaySlot) {
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ERROR_LOG(JIT, "Branch in delay slot at %08x", js.compilerPC);
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return;
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}
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int offset = (signed short)(op&0xFFFF)<<2;
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int rt = _RT;
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int rs = _RS;
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u32 targetAddr = js.compilerPC + offset + 4;
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u32 delaySlotOp = Memory::ReadUnchecked_U32(js.compilerPC+4);
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//Compile the delay slot
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bool delaySlotIsNice = GetOutReg(delaySlotOp) != rt && GetOutReg(delaySlotOp) != rs;// IsDelaySlotNice(op, delaySlotOp);
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if (!delaySlotIsNice)
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{
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//ERROR_LOG(CPU, "Not nice delay slot in BranchRSRTComp :( %08x", js.compilerPC);
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}
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delaySlotIsNice = false; // Until we have time to fully fix this
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if (rt == 0)
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{
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gpr.KillImmediate(rs, true, true);
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CMP(32, gpr.R(rs), Imm32(0));
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}
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else
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{
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gpr.BindToRegister(rs, true, false);
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CMP(32, gpr.R(rs), rt == 0 ? Imm32(0) : gpr.R(rt));
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}
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FlushAll();
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Gen::FixupBranch ptr;
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if (!likely)
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{
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CompileDelaySlot(!delaySlotIsNice);
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ptr = J_CC(cc, true);
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}
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else
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{
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ptr = J_CC(cc, true);
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CompileDelaySlot(false);
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}
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// Take the branch
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CONDITIONAL_LOG_EXIT(targetAddr);
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WriteExit(targetAddr, 0);
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SetJumpTarget(ptr);
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// Not taken
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CONDITIONAL_LOG_EXIT(js.compilerPC + 8);
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WriteExit(js.compilerPC + 8, 1);
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js.compiling = false;
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}
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void Jit::BranchRSZeroComp(u32 op, Gen::CCFlags cc, bool likely)
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{
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CONDITIONAL_LOG;
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if (js.inDelaySlot) {
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ERROR_LOG(JIT, "Branch in delay slot at %08x", js.compilerPC);
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return;
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}
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int offset = (signed short)(op&0xFFFF)<<2;
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int rs = _RS;
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u32 targetAddr = js.compilerPC + offset + 4;
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u32 delaySlotOp = Memory::ReadUnchecked_U32(js.compilerPC + 4);
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bool delaySlotIsNice = GetOutReg(delaySlotOp) != rs; //IsDelaySlotNice(op, delaySlotOp);
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if (!delaySlotIsNice)
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{
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//ERROR_LOG(CPU, "Not nice delay slot in BranchRSZeroComp :( %08x", js.compilerPC);
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}
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delaySlotIsNice = false; // Until we have time to fully fix this
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gpr.BindToRegister(rs, true, false);
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CMP(32, gpr.R(rs), Imm32(0));
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FlushAll();
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Gen::FixupBranch ptr;
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if (!likely)
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{
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CompileDelaySlot(!delaySlotIsNice);
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ptr = J_CC(cc, true);
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}
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else
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{
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ptr = J_CC(cc, true);
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CompileDelaySlot(false);
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}
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// Take the branch
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CONDITIONAL_LOG_EXIT(targetAddr);
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WriteExit(targetAddr, 0);
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SetJumpTarget(ptr);
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// Not taken
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CONDITIONAL_LOG_EXIT(js.compilerPC + 8);
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WriteExit(js.compilerPC + 8, 1);
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js.compiling = false;
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}
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void Jit::Comp_RelBranch(u32 op)
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{
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switch (op>>26)
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{
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case 4: BranchRSRTComp(op, CC_NZ, false); break;//beq
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case 5: BranchRSRTComp(op, CC_Z, false); break;//bne
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case 6: BranchRSZeroComp(op, CC_G, false); break;//blez
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case 7: BranchRSZeroComp(op, CC_LE, false); break;//bgtz
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case 20: BranchRSRTComp(op, CC_NZ, true); break;//beql
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case 21: BranchRSRTComp(op, CC_Z, true); break;//bnel
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case 22: BranchRSZeroComp(op, CC_G, true); break;//blezl
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case 23: BranchRSZeroComp(op, CC_LE, true); break;//bgtzl
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default:
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_dbg_assert_msg_(CPU,0,"Trying to compile instruction that can't be compiled");
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break;
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}
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js.compiling = false;
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}
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void Jit::Comp_RelBranchRI(u32 op)
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{
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switch ((op >> 16) & 0x1F)
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{
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case 0: BranchRSZeroComp(op, CC_GE, false); break; //if ((s32)R(rs) < 0) DelayBranchTo(addr); else PC += 4; break;//bltz
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case 1: BranchRSZeroComp(op, CC_L, false); break; //if ((s32)R(rs) >= 0) DelayBranchTo(addr); else PC += 4; break;//bgez
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case 2: BranchRSZeroComp(op, CC_GE, true); break; //if ((s32)R(rs) < 0) DelayBranchTo(addr); else PC += 8; break;//bltzl
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case 3: BranchRSZeroComp(op, CC_L, true); break; //if ((s32)R(rs) >= 0) DelayBranchTo(addr); else PC += 8; break;//bgezl
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default:
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_dbg_assert_msg_(CPU,0,"Trying to compile instruction that can't be compiled");
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break;
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}
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js.compiling = false;
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}
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// If likely is set, discard the branch slot if NOT taken.
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void Jit::BranchFPFlag(u32 op, Gen::CCFlags cc, bool likely)
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{
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CONDITIONAL_LOG;
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if (js.inDelaySlot) {
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ERROR_LOG(JIT, "Branch in delay slot at %08x", js.compilerPC);
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return;
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}
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int offset = (signed short)(op & 0xFFFF) << 2;
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u32 targetAddr = js.compilerPC + offset + 4;
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u32 delaySlotOp = Memory::ReadUnchecked_U32(js.compilerPC + 4);
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bool delaySlotIsNice = IsDelaySlotNice(op, delaySlotOp);
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if (!delaySlotIsNice)
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{
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//ERROR_LOG(CPU, "Not nice delay slot in BranchFPFlag :(");
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}
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delaySlotIsNice = false; // Until we have time to fully fix this
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FlushAll();
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TEST(32, M((void *)&(mips_->fpcond)), Imm32(1));
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Gen::FixupBranch ptr;
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if (!likely)
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{
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CompileDelaySlot(!delaySlotIsNice);
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ptr = J_CC(cc, true);
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}
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else
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{
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ptr = J_CC(cc, true);
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CompileDelaySlot(false);
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}
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// Take the branch
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CONDITIONAL_LOG_EXIT(targetAddr);
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WriteExit(targetAddr, 0);
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SetJumpTarget(ptr);
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// Not taken
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CONDITIONAL_LOG_EXIT(js.compilerPC + 8);
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WriteExit(js.compilerPC + 8, 1);
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js.compiling = false;
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}
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void Jit::Comp_FPUBranch(u32 op)
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{
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switch((op >> 16) & 0x1f)
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{
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case 0: BranchFPFlag(op, CC_NZ, false); break; //bc1f
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case 1: BranchFPFlag(op, CC_Z, false); break; //bc1t
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case 2: BranchFPFlag(op, CC_NZ, true); break; //bc1fl
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case 3: BranchFPFlag(op, CC_Z, true); break; //bc1tl
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default:
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_dbg_assert_msg_(CPU,0,"Trying to interpret instruction that can't be interpreted");
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break;
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}
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js.compiling = false;
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}
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// If likely is set, discard the branch slot if NOT taken.
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void Jit::BranchVFPUFlag(u32 op, Gen::CCFlags cc, bool likely)
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{
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CONDITIONAL_LOG;
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if (js.inDelaySlot) {
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ERROR_LOG(JIT, "Branch in delay slot at %08x", js.compilerPC);
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return;
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}
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int offset = (signed short)(op & 0xFFFF) << 2;
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u32 targetAddr = js.compilerPC + offset + 4;
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u32 delaySlotOp = Memory::ReadUnchecked_U32(js.compilerPC + 4);
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bool delaySlotIsNice = IsDelaySlotNice(op, delaySlotOp);
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if (!delaySlotIsNice)
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{
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//ERROR_LOG(CPU, "Not nice delay slot in BranchVFPUFlag :(");
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}
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delaySlotIsNice = false; // Until we have time to fully fix this
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FlushAll();
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// THE CONDITION
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int imm3 = (op >> 18) & 7;
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//int val = (mips_->vfpuCtrl[VFPU_CTRL_CC] >> imm3) & 1;
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TEST(32, M((void *)&(mips_->vfpuCtrl[VFPU_CTRL_CC])), Imm32(1 << imm3));
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Gen::FixupBranch ptr;
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if (!likely)
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{
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CompileDelaySlot(!delaySlotIsNice);
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ptr = J_CC(cc, true);
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}
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else
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{
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ptr = J_CC(cc, true);
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CompileDelaySlot(false);
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}
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// Take the branch
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CONDITIONAL_LOG_EXIT(targetAddr);
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WriteExit(targetAddr, 0);
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SetJumpTarget(ptr);
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// Not taken
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CONDITIONAL_LOG_EXIT(js.compilerPC + 8);
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WriteExit(js.compilerPC + 8, 1);
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js.compiling = false;
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}
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void Jit::Comp_VBranch(u32 op)
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{
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switch ((op >> 16) & 3)
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{
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case 0: BranchVFPUFlag(op, CC_NZ, false); break; //bvf
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case 1: BranchVFPUFlag(op, CC_Z, false); break; //bvt
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case 2: BranchVFPUFlag(op, CC_NZ, true); break; //bvfl
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case 3: BranchVFPUFlag(op, CC_Z, true); break; //bvtl
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default:
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_dbg_assert_msg_(CPU,0,"Comp_VBranch: Invalid instruction");
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break;
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}
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js.compiling = false;
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}
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void Jit::Comp_Jump(u32 op)
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{
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CONDITIONAL_LOG;
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if (js.inDelaySlot) {
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ERROR_LOG(JIT, "Branch in delay slot at %08x", js.compilerPC);
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return;
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}
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u32 off = ((op & 0x3FFFFFF) << 2);
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u32 targetAddr = (js.compilerPC & 0xF0000000) | off;
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CompileDelaySlot(false);
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switch (op >> 26)
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{
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case 2: //j
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CONDITIONAL_LOG_EXIT(targetAddr);
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WriteExit(targetAddr, 0);
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break;
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case 3: //jal
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MOV(32, M(&mips_->r[MIPS_REG_RA]), Imm32(js.compilerPC + 8)); // Save return address
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CONDITIONAL_LOG_EXIT(targetAddr);
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WriteExit(targetAddr, 0);
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break;
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default:
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_dbg_assert_msg_(CPU,0,"Trying to compile instruction that can't be compiled");
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break;
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}
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js.compiling = false;
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}
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static u32 savedPC;
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void Jit::Comp_JumpReg(u32 op)
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{
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CONDITIONAL_LOG;
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if (js.inDelaySlot) {
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ERROR_LOG(JIT, "Branch in delay slot at %08x", js.compilerPC);
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return;
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}
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int rs = _RS;
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u32 delaySlotOp = Memory::ReadUnchecked_U32(js.compilerPC + 4);
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bool delaySlotIsNice = GetOutReg(delaySlotOp) != rs;
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// Do what with that information?
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delaySlotIsNice = false; // Until we have time to fully fix this
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if (delaySlotIsNice)
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{
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// TODO: This flushes which is a waste, could add an extra param to skip.
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CompileDelaySlot(false);
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MOV(32, R(EAX), gpr.R(rs));
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FlushAll();
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}
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else
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{
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// Latch destination now - save it on the stack.
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gpr.BindToRegister(rs, true, false);
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MOV(32, M(¤tMIPS->pc), gpr.R(rs)); // for syscalls in delay slot - could be avoided
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MOV(32, M(&savedPC), gpr.R(rs));
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CompileDelaySlot(false);
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if (!js.compiling)
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{
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// Oh, there was a syscall in the delay slot
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// It took care of writing the exit code for us.
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return;
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}
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MOV(32, R(EAX), M(&savedPC));
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}
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switch (op & 0x3f)
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{
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case 8: //jr
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break;
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case 9: //jalr
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MOV(32, M(&mips_->r[MIPS_REG_RA]), Imm32(js.compilerPC + 8));
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break;
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default:
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_dbg_assert_msg_(CPU,0,"Trying to compile instruction that can't be compiled");
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break;
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}
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CONDITIONAL_LOG_EXIT_EAX();
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WriteExitDestInEAX();
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js.compiling = false;
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}
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void Jit::Comp_Syscall(u32 op)
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{
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FlushAll();
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// If we're in a delay slot, this is off by one.
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const int offset = js.inDelaySlot ? -1 : 0;
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WriteDowncount(offset);
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js.downcountAmount = -offset;
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ABI_CallFunctionC((void *)&CallSyscall, op);
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WriteSyscallExit();
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js.compiling = false;
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}
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} // namespace Mipscomp
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