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Cross function constant propagation

This commit is contained in:
drmortalwombat 2023-06-14 14:40:59 +02:00
parent 72687b7581
commit c83804a76c
13 changed files with 249 additions and 39 deletions
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1
README.md
View File

@ -27,7 +27,6 @@ There are still several open areas, but most targets have been reached. The cur
### Language
* Missing const checks for structs and enums
* Missing warnings for all kind of abuses
### Linker

2
autotest/floatstringtest.c
View File

@ -15,7 +15,7 @@ int main(void)
ftoa(x, xb); float xr = atof(xb);
ftoa(y, yb); float yr = atof(yb);
printf("%20g (%s) %20g : %20g (%s) %20g : %10f %10f \n", x, xb, xr, y, yb, y, fabs(x - xr) / x, fabs(y - yr) / y);
printf("%20g (%s) %20g : %20g (%s) %20g : %10f %10f \n", x, xb, xr, y, yb, yr, fabs(x - xr) / x, fabs(y - yr) / y);
if (fabs(x - xr) / x > 0.00001 || fabs(y - yr) / y > 0.00001)
return -1;

27
oscar64/Declaration.cpp
View File

@ -603,7 +603,8 @@ Expression* Expression::ConstantFold(Errors * errors)
Declaration::Declaration(const Location& loc, DecType type)
: mLocation(loc), mEndLocation(loc), mType(type), mScope(nullptr), mData(nullptr), mIdent(nullptr), mSize(0), mOffset(0), mFlags(0), mComplexity(0), mLocalSize(0),
mBase(nullptr), mParams(nullptr), mValue(nullptr), mNext(nullptr), mVarIndex(-1), mLinkerObject(nullptr), mCallers(nullptr), mCalled(nullptr), mAlignment(1),
mBase(nullptr), mParams(nullptr), mValue(nullptr), mNext(nullptr), mConst(nullptr),
mVarIndex(-1), mLinkerObject(nullptr), mCallers(nullptr), mCalled(nullptr), mAlignment(1),
mInteger(0), mNumber(0), mMinValue(-0x80000000LL), mMaxValue(0x7fffffffLL), mFastCallBase(0), mFastCallSize(0), mStride(0), mStripe(1),
mCompilerOptions(0), mUseCount(0)
{}
@ -725,18 +726,22 @@ Declaration* Declaration::ToStriped(int stripe)
Declaration* Declaration::ToConstType(void)
{
if (mFlags & DTF_CONST)
return this;
return this;
Declaration* ndec = new Declaration(mLocation, mType);
ndec->mSize = mSize;
ndec->mStride = mStride;
ndec->mBase = mBase;
ndec->mFlags = mFlags | DTF_CONST;
ndec->mScope = mScope;
ndec->mParams = mParams;
ndec->mIdent = mIdent;
if (!mConst)
{
Declaration* ndec = new Declaration(mLocation, mType);
ndec->mSize = mSize;
ndec->mStride = mStride;
ndec->mBase = mBase;
ndec->mFlags = mFlags | DTF_CONST;
ndec->mScope = mScope;
ndec->mParams = mParams;
ndec->mIdent = mIdent;
mConst = ndec;
}
return ndec;
return mConst;
}
bool Declaration::IsSubType(const Declaration* dec) const

6
oscar64/Declaration.h
View File

@ -87,9 +87,13 @@ static const uint64 DTF_FUNC_INTRSAVE = (1ULL << 37);
static const uint64 DTF_FUNC_INTRCALLED = (1ULL << 38);
static const uint64 DTF_FUNC_PURE = (1ULL << 39);
static const uint64 DTF_FPARAM_CONST = (1ULL << 40);
static const uint64 DTF_FPARAM_NOCONST = (1ULL << 41);
static const uint64 DTF_VAR_ALIASING = (1ULL << 48);
class Declaration;
class DeclarationScope
@ -188,7 +192,7 @@ public:
Location mLocation, mEndLocation;
DecType mType;
Token mToken;
Declaration* mBase, *mParams, * mNext;
Declaration* mBase, *mParams, * mNext, * mConst;
Expression* mValue;
DeclarationScope* mScope;
int mOffset, mSize, mVarIndex, mNumVars, mComplexity, mLocalSize, mAlignment, mFastCallBase, mFastCallSize, mStride, mStripe;

89
oscar64/GlobalAnalyzer.cpp
View File

@ -205,11 +205,42 @@ void GlobalAnalyzer::AutoInline(void)
} while (changed);
for (int i = 0; i < mFunctions.Size(); i++)
{
CheckFastcall(mFunctions[i], true);
}
for (int i = 0; i < mFunctions.Size(); i++)
{
Declaration* dec = mFunctions[i];
Declaration* pdec = dec->mBase->mParams;
while (pdec)
{
if (pdec->mFlags & DTF_FPARAM_CONST)
{
pdec->mVarIndex = dec->mNumVars++;
Expression* aexp = new Expression(pdec->mLocation, EX_ASSIGNMENT);
Expression* pexp = new Expression(pdec->mLocation, EX_VARIABLE);
Expression* lexp = new Expression(dec->mLocation, EX_SEQUENCE);
pexp->mDecType = pdec->mBase;
pexp->mDecValue = pdec;
aexp->mDecType = pdec->mBase;
aexp->mToken = TK_ASSIGN;
aexp->mLeft = pexp;
aexp->mRight = pdec->mValue;
lexp->mLeft = aexp;
lexp->mRight = dec->mValue;
dec->mValue = lexp;
}
pdec = pdec->mNext;
}
}
}
bool GlobalAnalyzer::MarkCycle(Declaration* rootDec, Declaration* procDec)
@ -635,13 +666,55 @@ Declaration * GlobalAnalyzer::Analyze(Expression* exp, Declaration* procDec, boo
{
// Check for struct to struct forwarding
Expression* rex = exp->mRight;
Declaration* pdec = ldec->mBase->mParams;
while (rex)
{
Expression* pex = rex->mType == EX_LIST ? rex->mLeft : rex;
if (pdec && !(ldec->mBase->mFlags & DTF_VARIADIC) && !(ldec->mFlags & (DTF_INTRINSIC | DTF_FUNC_ASSEMBLER)))
{
#if 1
if (mCompilerOptions & COPT_OPTIMIZE_BASIC)
{
if (!(pdec->mFlags & DTF_FPARAM_NOCONST))
{
if (pex->mType == EX_CONSTANT)
{
if (pdec->mFlags & DTF_FPARAM_CONST)
{
if (!pex->mDecValue->IsSame(pdec->mValue->mDecValue))
{
pdec->mFlags |= DTF_FPARAM_NOCONST;
pdec->mFlags &= ~DTF_FPARAM_CONST;
}
}
else
{
pdec->mValue = pex;
pdec->mFlags |= DTF_FPARAM_CONST;
}
}
else
{
pdec->mFlags |= DTF_FPARAM_NOCONST;
pdec->mFlags &= ~DTF_FPARAM_CONST;
}
}
}
else
{
pdec->mFlags |= DTF_FPARAM_NOCONST;
pdec->mFlags &= ~DTF_FPARAM_CONST;
}
#endif
}
if (pex->mType == EX_CALL && pex->mDecType->mType == DT_TYPE_STRUCT)
ldec->mBase->mFlags |= DTF_STACKCALL;
if (pdec)
pdec = pdec->mNext;
if (rex->mType == EX_LIST)
rex = rex->mRight;
else
@ -800,7 +873,17 @@ void GlobalAnalyzer::RegisterProc(Declaration* to)
{
if (to->mType == DT_CONST_FUNCTION)
{
to->mFlags |= DTF_FUNC_VARIABLE;
mVariableFunctions.Push(to);
if (!(to->mFlags & DTF_FUNC_VARIABLE))
{
to->mFlags |= DTF_FUNC_VARIABLE;
mVariableFunctions.Push(to);
Declaration* pdec = to->mParams;
while (pdec)
{
pdec->mFlags |= DTF_FPARAM_NOCONST;
pdec->mFlags &= ~DTF_FPARAM_CONST;
pdec = pdec->mNext;
}
}
}
}

32
oscar64/InterCode.cpp
View File

@ -3351,8 +3351,19 @@ bool InterInstruction::PropagateConstTemps(const GrowingInstructionPtrArray& cte
}
break;
case IC_BRANCH:
if (mSrc[0].mTemp >= 0 && ctemps[mSrc[0].mTemp])
{
InterInstruction* ains = ctemps[mSrc[0].mTemp];
mSrc[0] = ains->mConst;
this->ConstantFolding();
return true;
}
break;
}
return false;
}
@ -4076,6 +4087,24 @@ bool InterInstruction::ConstantFolding(void)
return true;
}
break;
case IC_BRANCH:
if (mSrc[0].mTemp < 0)
{
if (IsIntegerType(mSrc[0].mType))
mSrc[0].mIntConst = mSrc[0].mIntConst != 0;
else if (mSrc[0].mType == IT_FLOAT)
mSrc[0].mIntConst = mSrc[0].mFloatConst != 0;
else if (mSrc[0].mType == IT_POINTER)
{
if (mSrc[0].mMemory == IM_ABSOLUTE)
mSrc[0].mIntConst = mSrc[0].mIntConst != 0;
else
mSrc[0].mIntConst = 1;
}
mSrc[0].mType = IT_BOOL;
return true;
}
break;
}
return false;
@ -15987,7 +16016,7 @@ void InterCodeProcedure::Close(void)
{
GrowingTypeArray tstack(IT_NONE);
CheckFunc = !strcmp(mIdent->mString, "tile_draw_p");
CheckFunc = !strcmp(mIdent->mString, "main");
mEntryBlock = mBlocks[0];
@ -16790,6 +16819,7 @@ void InterCodeProcedure::Close(void)
void InterCodeProcedure::AddCalledFunction(InterCodeProcedure* proc)
{
assert(proc != nullptr);
mCalledFunctions.Push(proc);
}

62
oscar64/InterCodeGenerator.cpp
View File

@ -873,7 +873,8 @@ InterCodeGenerator::ExValue InterCodeGenerator::TranslateInline(Declaration* pro
if (pdec)
{
nmapper.mParams[pdec->mVarIndex] = nindex;
if (!(pdec->mFlags & DTF_FPARAM_CONST))
nmapper.mParams[pdec->mVarIndex] = nindex;
vdec->mVarIndex = nindex;
vdec->mBase = pdec->mBase;
@ -972,7 +973,9 @@ InterCodeGenerator::ExValue InterCodeGenerator::TranslateInline(Declaration* pro
wins->mSrc[1].mOperandSize = vr.mType->mSize;
else
wins->mSrc[1].mOperandSize = 2;
block->Append(wins);
if (!pdec || !(pdec->mFlags & DTF_FPARAM_CONST))
block->Append(wins);
}
if (pdec)
@ -1255,7 +1258,14 @@ InterCodeGenerator::ExValue InterCodeGenerator::TranslateExpression(Declaration*
int ref = 1;
if (dec->mType == DT_ARGUMENT)
{
if (inlineMapper)
if (dec->mFlags & DTF_FPARAM_CONST)
{
ins->mConst.mMemory = IM_LOCAL;
if (inlineMapper)
ins->mConst.mVarIndex += inlineMapper->mVarIndex;
InitLocalVariable(proc, dec, ins->mConst.mVarIndex);
}
else if (inlineMapper)
{
ins->mConst.mMemory = IM_LOCAL;
ins->mConst.mVarIndex = inlineMapper->mParams[dec->mVarIndex];
@ -2633,10 +2643,13 @@ InterCodeGenerator::ExValue InterCodeGenerator::TranslateExpression(Declaration*
else
wins->mSrc[1].mOperandSize = 2;
if (ftype->mFlags & DTF_FASTCALL)
defins.Push(wins);
else
block->Append(wins);
if (!pdec || !(pdec->mFlags & DTF_FPARAM_CONST))
{
if (ftype->mFlags & DTF_FASTCALL)
defins.Push(wins);
else
block->Append(wins);
}
atotal += wins->mSrc[1].mOperandSize;
}
@ -2747,7 +2760,13 @@ InterCodeGenerator::ExValue InterCodeGenerator::TranslateExpression(Declaration*
if (vdec->mType == DT_ARGUMENT)
{
vins->mConst.mVarIndex = vdec->mVarIndex;
if (inlineMapper)
if (vdec->mFlags & DTF_FPARAM_CONST)
{
vins->mConst.mMemory = IM_LOCAL;
if (inlineMapper)
vins->mConst.mVarIndex += inlineMapper->mVarIndex;
}
else if (inlineMapper)
{
vins->mConst.mMemory = IM_LOCAL;
vins->mConst.mVarIndex = inlineMapper->mParams[vdec->mVarIndex];
@ -3795,6 +3814,33 @@ InterCodeProcedure* InterCodeGenerator::TranslateProcedure(InterCodeModule * mod
{
if (mCompilerOptions & COPT_VERBOSE2)
printf("Generate intermediate code <%s>\n", proc->mIdent->mString);
#if 0
Declaration* pdec = dec->mBase->mParams;
while (pdec)
{
if (pdec->mFlags & DTF_FPARAM_CONST)
{
pdec->mVarIndex = proc->mNumLocals;
proc->mNumLocals ++;
dec->mNumVars++;
InitParameter(proc, pdec, pdec->mVarIndex + proc->mFastCallBase);
Expression* aexp = new Expression(pdec->mLocation, EX_ASSIGNMENT);
Expression* pexp = new Expression(pdec->mLocation, EX_VARIABLE);
pexp->mDecType = pdec->mBase;
pexp->mDecValue = pdec;
aexp->mDecType = pdec->mBase;
aexp->mToken = TK_ASSIGN;
aexp->mLeft = pexp;
aexp->mRight = pdec->mValue;
TranslateExpression(dec->mBase, proc, exitBlock, aexp, nullptr, nullptr, nullptr);
}
pdec = pdec->mNext;
}
#endif
TranslateExpression(dec->mBase, proc, exitBlock, exp, nullptr, nullptr, nullptr);
}

30
oscar64/NativeCodeGenerator.cpp
View File

@ -12921,6 +12921,23 @@ bool NativeCodeBasicBlock::CollectZeroPageSet(ZeroPageSet& locals, ZeroPageSet&
}
}
break;
case ASMIM_ZERO_PAGE_X:
if (mIns[i].ChangesAddress())
{
if (i > 1 && i + 2 < mIns.Size())
{
if (mIns[i - 2].mType == ASMIT_LDX && mIns[i - 2].mMode == ASMIM_IMMEDIATE &&
mIns[i - 1].mType == ASMIT_LDA &&
mIns[i + 0].mType == ASMIT_STA &&
mIns[i + 1].mType == ASMIT_DEX &&
mIns[i + 2].mType == ASMIT_BPL)
{
for (int j = 0; j < mIns[i - 2].mAddress; j++)
locals += mIns[i].mAddress + j;
}
}
}
break;
}
}
@ -19640,6 +19657,8 @@ bool NativeCodeBasicBlock::JoinTailCodeSequences(NativeCodeProcedure* proc, bool
mIns[ns - 2].mType = ASMIT_STX;
mTrueJump->mIns.Insert(0, ins);
mTrueJump->mIns[0].mLive |= LIVE_CPU_REG_C;
if (mTrueJump->mEntryRequiredRegs[CPU_REG_A])
mTrueJump->mIns[0].mLive |= LIVE_CPU_REG_A;
mIns.Remove(ns - 2);
mTrueJump->mEntryRequiredRegs += CPU_REG_X;
mTrueJump->CheckLive();
@ -19651,6 +19670,8 @@ bool NativeCodeBasicBlock::JoinTailCodeSequences(NativeCodeProcedure* proc, bool
mIns[ns - 2].mType = ASMIT_STX;
mFalseJump->mIns.Insert(0, ins);
mFalseJump->mIns[0].mLive |= LIVE_CPU_REG_C;
if (mFalseJump->mEntryRequiredRegs[CPU_REG_A])
mFalseJump->mIns[0].mLive |= LIVE_CPU_REG_A;
mIns.Remove(ns - 2);
mFalseJump->mEntryRequiredRegs += CPU_REG_X;
mFalseJump->CheckLive();
@ -24716,6 +24737,7 @@ bool NativeCodeBasicBlock::ReplaceZeroPageDown(int at)
{
if (mIns[i].mType == ASMIT_LDA && mIns[i].mMode == ASMIM_ZERO_PAGE && mIns[i].mAddress == mIns[at].mAddress)
{
mIns[i].mLive |= LIVE_CPU_REG_A;
mIns[at + 1].mLive |= mIns[i].mLive;
mIns.Insert(i + 1, mIns[at + 1]);
mIns.Remove(at, 2);
@ -36285,6 +36307,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(NativeCodeProcedure* proc, int pass
mIns[i + 0].mType = ASMIT_EOR;
mIns[i + 0].mMode = ASMIM_IMMEDIATE;
mIns[i + 0].mAddress = 0xff;
mIns[i + 0].mLive |= LIVE_CPU_REG_A;
mIns[i + 3].mType = ASMIT_ADC;
mIns[i + 3].mAddress = mIns[i + 1].mAddress;
@ -36302,6 +36325,8 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(NativeCodeProcedure* proc, int pass
mIns[i + 0].mType = ASMIT_EOR;
mIns[i + 0].mMode = ASMIM_IMMEDIATE;
mIns[i + 0].mAddress = 0xff;
mIns[i + 0].mLive |= LIVE_CPU_REG_A;
mIns[i + 1].mLive |= LIVE_CPU_REG_A;
mIns[i + 3].mType = ASMIT_ADC;
mIns[i + 3].mAddress = mIns[i + 2].mAddress;
@ -36318,6 +36343,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(NativeCodeProcedure* proc, int pass
{
mIns[i + 3].CopyMode(mIns[i + 1]);
mIns[i + 3].mType = ASMIT_ADC;
mIns[i + 2].mLive |= LIVE_CPU_REG_A;
mIns[i + 0].mType = ASMIT_NOP; mIns[i + 0].mMode = ASMIM_IMPLIED;
mIns[i + 1].mType = ASMIT_NOP; mIns[i + 1].mMode = ASMIM_IMPLIED;
@ -39056,7 +39082,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(NativeCodeProcedure* proc, int pass
if (mBranch == ASMIT_BEQ && mTrueJump->mIns[0].mAddress == 1 && mFalseJump->mIns[0].mAddress == 0)
{
mIns.Insert(mIns.Size() - 1, NativeCodeInstruction(mBranchIns, ASMIT_LDA, ASMIM_IMMEDIATE, 0));
mIns[mIns.Size() - 1].mType = ASMIT_CMP; mIns[mIns.Size() - 1].mLive |= LIVE_CPU_REG_C;
mIns[mIns.Size() - 1].mType = ASMIT_CMP; mIns[mIns.Size() - 1].mLive |= LIVE_CPU_REG_C | LIVE_CPU_REG_A;
mIns.Push(NativeCodeInstruction(mBranchIns, ASMIT_ROL, ASMIM_IMPLIED));
mExitProvidedRegs += CPU_REG_A;
mBranch = ASMIT_JMP;
@ -39069,7 +39095,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(NativeCodeProcedure* proc, int pass
else if (mBranch == ASMIT_BNE && mTrueJump->mIns[0].mAddress == 0 && mFalseJump->mIns[0].mAddress == 1)
{
mIns.Insert(mIns.Size() - 1, NativeCodeInstruction(mBranchIns, ASMIT_LDA, ASMIM_IMMEDIATE, 0));
mIns[mIns.Size() - 1].mType = ASMIT_CMP; mIns[mIns.Size() - 1].mLive |= LIVE_CPU_REG_C;
mIns[mIns.Size() - 1].mType = ASMIT_CMP; mIns[mIns.Size() - 1].mLive |= LIVE_CPU_REG_C | LIVE_CPU_REG_A;
mIns.Push(NativeCodeInstruction(mBranchIns, ASMIT_ROL, ASMIM_IMPLIED));
mExitProvidedRegs += CPU_REG_A;
mBranch = ASMIT_JMP;

23
oscar64/Parser.cpp
View File

@ -1551,16 +1551,27 @@ Expression* Parser::ParseSimpleExpression(void)
}
else if (dec->mType == DT_VARIABLE || dec->mType == DT_ARGUMENT)
{
if ((dec->mFlags & DTF_STATIC) && (dec->mFlags & DTF_CONST) && dec->mValue && dec->mBase->IsNumericType())
if (/*(dec->mFlags & DTF_STATIC) &&*/ (dec->mFlags & DTF_CONST) && dec->mValue)
{
exp = dec->mValue;
if (dec->mBase->IsNumericType())
exp = dec->mValue;
else if (dec->mBase->mType == DT_TYPE_POINTER)
{
if (dec->mValue->mType == EX_CONSTANT)
{
if (dec->mValue->mDecValue->mType == DT_CONST_ADDRESS || dec->mValue->mDecValue->mType == DT_CONST_POINTER)
exp = dec->mValue;
}
}
}
else
if (!exp)
{
exp = new Expression(mScanner->mLocation, EX_VARIABLE);
exp->mDecValue = dec;
exp->mDecType = dec->mBase;
}
mScanner->NextToken();
}
else if (dec->mType <= DT_TYPE_FUNCTION)
@ -1747,6 +1758,9 @@ Expression* Parser::ParsePostfixExpression(void)
{
nexp->mDecValue = mdec;
nexp->mDecType = mdec->mBase;
if (exp->mDecType->mFlags & DTF_CONST)
nexp->mDecType = nexp->mDecType->ToConstType();
exp = nexp->ConstantFold(mErrors);
}
else
@ -1776,6 +1790,9 @@ Expression* Parser::ParsePostfixExpression(void)
{
nexp->mDecValue = mdec;
nexp->mDecType = mdec->mBase;
if (exp->mDecType->mFlags & DTF_CONST)
nexp->mDecType = nexp->mDecType->ToConstType();
exp = nexp->ConstantFold(mErrors);
}
else

2
oscar64/oscar64.cpp
View File

@ -74,7 +74,7 @@ int main2(int argc, const char** argv)
#else
strcpy(strProductName, "oscar64");
strcpy(strProductVersion, "1.19.204");
strcpy(strProductVersion, "1.20.205");
#ifdef __APPLE__
uint32_t length = sizeof(basePath);

8
oscar64/oscar64.rc
View File

@ -25,8 +25,8 @@ LANGUAGE LANG_ENGLISH, SUBLANG_NEUTRAL
//
VS_VERSION_INFO VERSIONINFO
FILEVERSION 1,19,204,0
PRODUCTVERSION 1,19,204,0
FILEVERSION 1,20,205,0
PRODUCTVERSION 1,20,205,0
FILEFLAGSMASK 0x3fL
#ifdef _DEBUG
FILEFLAGS 0x1L
@ -43,12 +43,12 @@ BEGIN
BEGIN
VALUE "CompanyName", "oscar64"
VALUE "FileDescription", "oscar64 compiler"
VALUE "FileVersion", "1.19.204.0"
VALUE "FileVersion", "1.20.205.0"
VALUE "InternalName", "oscar64.exe"
VALUE "LegalCopyright", "Copyright (C) 2021"
VALUE "OriginalFilename", "oscar64.exe"
VALUE "ProductName", "oscar64"
VALUE "ProductVersion", "1.19.204.0"
VALUE "ProductVersion", "1.20.205.0"
END
END
BLOCK "VarFileInfo"

6
oscar64setup/oscar64setup.vdproj
View File

@ -5233,15 +5233,15 @@
{
"Name" = "8:Microsoft Visual Studio"
"ProductName" = "8:oscar64"
"ProductCode" = "8:{F70E375C-D170-4C0A-A338-9F17D3559C99}"
"PackageCode" = "8:{7E82B938-0057-4512-9C0B-5E1EF0CC779C}"
"ProductCode" = "8:{9DBE9E77-8642-420D-8EE1-3D5CFDCE1BD0}"
"PackageCode" = "8:{D0A5FA0F-5C04-421E-84FF-05F7F4AB42EB}"
"UpgradeCode" = "8:{9AB61EFF-ACAC-4079-9950-8D96615CD4EF}"
"AspNetVersion" = "8:2.0.50727.0"
"RestartWWWService" = "11:FALSE"
"RemovePreviousVersions" = "11:TRUE"
"DetectNewerInstalledVersion" = "11:TRUE"
"InstallAllUsers" = "11:FALSE"
"ProductVersion" = "8:1.19.204"
"ProductVersion" = "8:1.20.205"
"Manufacturer" = "8:oscar64"
"ARPHELPTELEPHONE" = "8:"
"ARPHELPLINK" = "8:"

BIN
samples/memmap/charsetload.d64
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