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pull the code to get the operand value out of the loop.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119130 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-11-15 07:09:28 +00:00
parent 1620117f76
commit 8ae082bf19
1 changed files with 58 additions and 48 deletions
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106
utils/TableGen/CodeEmitterGen.cpp
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@ -74,10 +74,65 @@ void CodeEmitterGen::
AddCodeToMergeInOperand(Record *R, BitsInit *BI, const std::string &VarName,
unsigned &NumberedOp,
std::string &Case, CodeGenTarget &Target) {
bool gotOp = false;
CodeGenInstruction &CGI = Target.getInstruction(R);
for (int bit = BI->getNumBits()-1; bit >= 0; ) {
// Determine if VarName actually contributes to the Inst encoding.
int bit = BI->getNumBits()-1;
// Scan for a bit that this contributed to.
for (; bit >= 0; ) {
if (getVariableBit(VarName, BI, bit) != -1)
break;
--bit;
}
// If we found no bits, ignore this value, otherwise emit the call to get the
// operand encoding.
if (bit < 0) return;
// If the operand matches by name, reference according to that
// operand number. Non-matching operands are assumed to be in
// order.
unsigned OpIdx;
if (CGI.Operands.hasOperandNamed(VarName, OpIdx)) {
// Get the machine operand number for the indicated operand.
OpIdx = CGI.Operands[OpIdx].MIOperandNo;
assert(!CGI.Operands.isFlatOperandNotEmitted(OpIdx) &&
"Explicitly used operand also marked as not emitted!");
} else {
/// If this operand is not supposed to be emitted by the
/// generated emitter, skip it.
while (CGI.Operands.isFlatOperandNotEmitted(NumberedOp))
++NumberedOp;
OpIdx = NumberedOp++;
}
std::pair<unsigned, unsigned> SO = CGI.Operands.getSubOperandNumber(OpIdx);
std::string &EncoderMethodName = CGI.Operands[SO.first].EncoderMethodName;
// If the source operand has a custom encoder, use it. This will
// get the encoding for all of the suboperands.
if (!EncoderMethodName.empty()) {
// A custom encoder has all of the information for the
// sub-operands, if there are more than one, so only
// query the encoder once per source operand.
if (SO.second == 0) {
Case += " // op: " + VarName + "\n" +
" op = " + EncoderMethodName + "(MI, " + utostr(OpIdx);
if (MCEmitter)
Case += ", Fixups";
Case += ");\n";
}
} else {
Case += " // op: " + VarName + "\n" +
" op = getMachineOpValue(MI, MI.getOperand(" + utostr(OpIdx) + ")";
if (MCEmitter)
Case += ", Fixups";
Case += ");\n";
}
for (; bit >= 0; ) {
int varBit = getVariableBit(VarName, BI, bit);
// If this bit isn't from a variable, skip it.
@ -97,52 +152,7 @@ AddCodeToMergeInOperand(Record *R, BitsInit *BI, const std::string &VarName,
++N;
--bit;
}
if (!gotOp) {
// If the operand matches by name, reference according to that
// operand number. Non-matching operands are assumed to be in
// order.
unsigned OpIdx;
if (CGI.Operands.hasOperandNamed(VarName, OpIdx)) {
// Get the machine operand number for the indicated operand.
OpIdx = CGI.Operands[OpIdx].MIOperandNo;
assert(!CGI.Operands.isFlatOperandNotEmitted(OpIdx) &&
"Explicitly used operand also marked as not emitted!");
} else {
/// If this operand is not supposed to be emitted by the
/// generated emitter, skip it.
while (CGI.Operands.isFlatOperandNotEmitted(NumberedOp))
++NumberedOp;
OpIdx = NumberedOp++;
}
std::pair<unsigned, unsigned> SO =CGI.Operands.getSubOperandNumber(OpIdx);
std::string &EncoderMethodName = CGI.Operands[SO.first].EncoderMethodName;
// If the source operand has a custom encoder, use it. This will
// get the encoding for all of the suboperands.
if (!EncoderMethodName.empty()) {
// A custom encoder has all of the information for the
// sub-operands, if there are more than one, so only
// query the encoder once per source operand.
if (SO.second == 0) {
Case += " // op: " + VarName + "\n"
+ " op = " + EncoderMethodName + "(MI, "
+ utostr(OpIdx);
if (MCEmitter)
Case += ", Fixups";
Case += ");\n";
}
} else {
Case += " // op: " + VarName + "\n" +
" op = getMachineOpValue(MI, MI.getOperand(" +
utostr(OpIdx) + ")";
if (MCEmitter)
Case += ", Fixups";
Case += ");\n";
}
gotOp = true;
}
unsigned opMask = ~0U >> (32-N);
int opShift = beginVarBit - N + 1;
opMask <<= opShift;