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integrate changes from ARM64 backend and more

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- better handle LDM/STM in reg alloc
- unify Halted and IRQ in anticipation for branch inlining
- literal optimisations can be disabled in gui
- jit blocks follow simple returns
- fix idle loop detection
- break jit blocks on IRQ (fixes saving in Pokemon White)
This commit is contained in:
RSDuck
2019-10-18 13:29:17 +02:00
parent aa23f21b8d
commit 81f38c14be
13 changed files with 179 additions and 48 deletions
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50
src/ARMJIT.cpp
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@ -16,11 +16,13 @@
#include "GPU3D.h"
#include "SPU.h"
#include "Wifi.h"
#include "NDSCart.h"
namespace ARMJIT
{
#define JIT_DEBUGPRINT(msg, ...)
//#define JIT_DEBUGPRINT(msg, ...) printf(msg, ## __VA_ARGS__)
Compiler* compiler;
@ -159,13 +161,17 @@ void FloodFillSetFlags(FetchedInstr instrs[], int start, u8 flags)
}
}
bool DecodeBranch(bool thumb, const FetchedInstr& instr, u32& cond, u32& targetAddr)
bool DecodeBranch(bool thumb, const FetchedInstr& instr, u32& cond, bool hasLink, u32 lr, bool& link,
u32& linkAddr, u32& targetAddr)
{
if (thumb)
{
u32 r15 = instr.Addr + 4;
cond = 0xE;
link = instr.Info.Kind == ARMInstrInfo::tk_BL_LONG;
linkAddr = instr.Addr + 4;
if (instr.Info.Kind == ARMInstrInfo::tk_BL_LONG && !(instr.Instr & (1 << 12)))
{
targetAddr = r15 + ((s32)((instr.Instr & 0x7FF) << 21) >> 9);
@ -185,9 +191,18 @@ bool DecodeBranch(bool thumb, const FetchedInstr& instr, u32& cond, u32& targetA
targetAddr = r15 + offset;
return true;
}
else if (hasLink && instr.Info.Kind == ARMInstrInfo::tk_BX && instr.A_Reg(3) == 14)
{
JIT_DEBUGPRINT("returning!\n");
targetAddr = lr;
return true;
}
}
else
{
link = instr.Info.Kind == ARMInstrInfo::ak_BL;
linkAddr = instr.Addr + 4;
cond = instr.Cond();
if (instr.Info.Kind == ARMInstrInfo::ak_BL
|| instr.Info.Kind == ARMInstrInfo::ak_B)
@ -197,6 +212,12 @@ bool DecodeBranch(bool thumb, const FetchedInstr& instr, u32& cond, u32& targetA
targetAddr = r15 + offset;
return true;
}
else if (hasLink && instr.Info.Kind == ARMInstrInfo::ak_BX && instr.A_Reg(0) == 14)
{
JIT_DEBUGPRINT("returning!\n");
targetAddr = lr;
return true;
}
}
return false;
}
@ -351,6 +372,8 @@ void CompileBlock(ARM* cpu)
CodeRanges[pseudoPhysicalAddr / 512].TimesInvalidated);
u32 lastSegmentStart = blockAddr;
u32 lr;
bool hasLink = false;
do
{
@ -413,6 +436,9 @@ void CompileBlock(ARM* cpu)
cpu->CurInstr = instrs[i].Instr;
cpu->CodeCycles = instrs[i].CodeCycles;
if (instrs[i].Info.DstRegs & (1 << 14))
hasLink = false;
if (thumb)
{
InterpretTHUMB[instrs[i].Info.Kind](cpu);
@ -452,8 +478,9 @@ void CompileBlock(ARM* cpu)
{
bool hasBranched = cpu->R[15] != r15;
u32 cond, target;
bool staticBranch = DecodeBranch(thumb, instrs[i], cond, target);
bool link;
u32 cond, target, linkAddr;
bool staticBranch = DecodeBranch(thumb, instrs[i], cond, hasLink, lr, link, linkAddr, target);
JIT_DEBUGPRINT("branch cond %x target %x (%d)\n", cond, target, hasBranched);
if (staticBranch)
@ -474,18 +501,24 @@ void CompileBlock(ARM* cpu)
if (cond < 0xE && target < instrs[i].Addr && target >= lastSegmentStart)
{
// we might have an idle loop
u32 offset = (target - blockAddr) / (thumb ? 2 : 4);
if (IsIdleLoop(instrs + offset, i - offset + 1))
u32 backwardsOffset = (instrs[i].Addr - target) / (thumb ? 2 : 4);
if (IsIdleLoop(&instrs[i - backwardsOffset], backwardsOffset + 1))
{
instrs[i].BranchFlags |= branch_IdleBranch;
JIT_DEBUGPRINT("found %s idle loop %d in block %x\n", thumb ? "thumb" : "arm", cpu->Num, blockAddr);
}
}
else if (hasBranched && (!thumb || cond == 0xE) && !isBackJump && i + 1 < Config::JIT_MaxBlockSize)
else if (hasBranched && !isBackJump && i + 1 < Config::JIT_MaxBlockSize)
{
u32 targetPseudoPhysical = cpu->Num == 0
? TranslateAddr<0>(target)
: TranslateAddr<1>(target);
if (link)
{
lr = linkAddr;
hasLink = true;
}
r15 = target + (thumb ? 2 : 4);
assert(r15 == cpu->R[15]);
@ -520,7 +553,7 @@ void CompileBlock(ARM* cpu)
bool secondaryFlagReadCond = !canCompile || (instrs[i - 1].BranchFlags & (branch_FollowCondTaken | branch_FollowCondNotTaken));
if (instrs[i - 1].Info.ReadFlags != 0 || secondaryFlagReadCond)
FloodFillSetFlags(instrs, i - 2, !secondaryFlagReadCond ? instrs[i - 1].Info.ReadFlags : 0xF);
} while(!instrs[i - 1].Info.EndBlock && i < Config::JIT_MaxBlockSize && !cpu->Halted);
} while(!instrs[i - 1].Info.EndBlock && i < Config::JIT_MaxBlockSize && !cpu->Halted && (!cpu->IRQ || (cpu->CPSR & 0x80)));
u32 restoreSlot = HashRestoreCandidate(pseudoPhysicalAddr);
JitBlock* prevBlock = RestoreCandidates[restoreSlot];
@ -713,6 +746,9 @@ void* GetFuncForAddr(ARM* cpu, u32 addr, bool store, int size)
{
if ((addr & 0xFF000000) == 0x04000000)
{
if (!store && size == 32 && addr == 0x04100010 && NDS::ExMemCnt[0] & (1<<11))
return (void*)NDSCart::ReadROMData;
/*
unfortunately we can't map GPU2D this way
since it's hidden inside an object