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authorMisha Brukman <brukman+llvm@gmail.com>2003-05-27 22:19:58 +0000
committerMisha Brukman <brukman+llvm@gmail.com>2003-05-27 22:19:58 +0000
commitcbfde0a6128bd7049433e03bba69911d55288fb1 (patch)
treeb067f77d325d028347aa6a3d69c46bf64cb2f405 /utils
parent51aa21c7026a61fcf2d54d32051574409d373496 (diff)
downloadexternal_llvm-cbfde0a6128bd7049433e03bba69911d55288fb1.zip
external_llvm-cbfde0a6128bd7049433e03bba69911d55288fb1.tar.gz
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* Now outputting a static function getBinaryCodeForInstr() (JIT-accessible)
* For debugging purposes: + output the predefined bit pattern of the instruction * Fixed inefficiency: only load an operand from MachineInstr once * Bug fix: did not advance bit index when seeing named bit-fields "annul", "cc" and "predict" * Added a catch-all for non-supported instructions at the end of switch stmt. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6368 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'utils')
-rw-r--r--utils/TableGen/CodeEmitterGen.cpp49
1 files changed, 33 insertions, 16 deletions
diff --git a/utils/TableGen/CodeEmitterGen.cpp b/utils/TableGen/CodeEmitterGen.cpp
index 0d37887..90474cf 100644
--- a/utils/TableGen/CodeEmitterGen.cpp
+++ b/utils/TableGen/CodeEmitterGen.cpp
@@ -18,9 +18,10 @@ void CodeEmitterGen::createEmitter(std::ostream &o) {
std::string ClassName = "SparcV9CodeEmitter::";
//const std::string &Namespace = Inst->getValue("Namespace")->getName();
- o << "unsigned " << ClassName
+ o << "static unsigned " << ClassName
<< "getBinaryCodeForInstr(MachineInstr &MI) {\n"
<< " unsigned Value = 0;\n"
+ << " std::cerr << MI;\n"
<< " switch (MI.getOpcode()) {\n";
for (std::vector<Record*>::iterator I = Insts.begin(), E = Insts.end();
I != E; ++I)
@@ -38,18 +39,25 @@ void CodeEmitterGen::createEmitter(std::ostream &o) {
unsigned Value = 0;
const std::vector<RecordVal> &Vals = R->getValues();
+ o << " // prefilling: ";
// Start by filling in fixed values...
- for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
- if (BitInit *B = dynamic_cast<BitInit*>(BI->getBit(i)))
- Value |= B->getValue() << i;
+ for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i) {
+ if (BitInit *B = dynamic_cast<BitInit*>(BI->getBit(e-i-1))) {
+ Value |= B->getValue() << (e-i-1);
+ o << B->getValue();
+ } else {
+ o << "0";
+ }
+ }
+ o << "\n\n";
- o << " Value = " << Value << "U;\n";
- o << " // " << *InstVal << "\n";
+ o << " // " << *InstVal << "\n\n";
+ o << " Value = " << Value << "U;\n\n";
// Loop over all of the fields in the instruction adding in any
// contributions to this value (due to bit references).
//
- unsigned Offset = 31, opNum=0;
+ unsigned op = 0;
std::map<const std::string,unsigned> OpOrder;
for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
if (Vals[i].getName() != "Inst" &&
@@ -58,11 +66,15 @@ void CodeEmitterGen::createEmitter(std::ostream &o) {
Vals[i].getName() != "cc" &&
Vals[i].getName() != "predict")
{
- o << " // " << opNum << ": " << Vals[i].getName() << "\n";
- OpOrder[Vals[i].getName()] = opNum++;
+ o << " // op" << op << ": " << Vals[i].getName() << "\n"
+ << " int64_t op" << op
+ <<" = getMachineOpValue(MI.getOperand("<<op<<"));\n";
+ //<< " MachineOperand &op" << op <<" = MI.getOperand("<<op<<");\n";
+ OpOrder[Vals[i].getName()] = op++;
}
}
+ unsigned Offset = 31;
for (int f = Vals.size()-1; f >= 0; --f) {
if (Vals[f].getPrefix()) {
BitsInit *FieldInitializer = (BitsInit*)Vals[f].getValue();
@@ -70,7 +82,6 @@ void CodeEmitterGen::createEmitter(std::ostream &o) {
// Scan through the field looking for bit initializers of the current
// variable...
for (int i = FieldInitializer->getNumBits()-1; i >= 0; --i) {
-
if (BitInit *BI=dynamic_cast<BitInit*>(FieldInitializer->getBit(i))){
--Offset;
} else if (UnsetInit *UI =
@@ -80,26 +91,32 @@ void CodeEmitterGen::createEmitter(std::ostream &o) {
dynamic_cast<VarBitInit*>(FieldInitializer->getBit(i))) {
TypedInit *TI = VBI->getVariable();
if (VarInit *VI = dynamic_cast<VarInit*>(TI)) {
- o << " Value |= getValueBit(MI.getOperand("
- << OpOrder[VI->getName()]
- << "), " << VBI->getBitNum()
+ o << " Value |= getValueBit(op" << OpOrder[VI->getName()]
+ << ", " << VBI->getBitNum()
<< ")" << " << " << Offset << ";\n";
--Offset;
} else if (FieldInit *FI = dynamic_cast<FieldInit*>(TI)) {
// FIXME: implement this!
o << "FIELD INIT not implemented yet!\n";
} else {
- o << "something else\n";
+ o << "Error: UNIMPLEMENTED\n";
}
}
- }
+ }
+ } else {
+ if (Vals[f].getName() == "annul" || Vals[f].getName() == "cc" ||
+ Vals[f].getName() == "predict")
+ --Offset;
}
}
o << " break;\n"
<< " }\n";
}
- o << " }\n"
+ o << " default:\n"
+ << " std::cerr << \"Not supported instr: \" << MI << \"\\n\";\n"
+ << " abort();\n"
+ << " }\n"
<< " return Value;\n"
<< "}\n";
}