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Steal bits from the asm string index to use for operand information. On both

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x86 and ppc, this gets us 4 more bits to play with, since the string indices
both only use 12 bits.

llvm-svn: 29180
This commit is contained in:
Chris Lattner 2006-07-18 17:38:46 +00:00
parent c4f6ee6c6d
commit b84950e599
1 changed files with 12 additions and 10 deletions
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22
utils/TableGen/AsmWriterEmitter.cpp
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@ -457,8 +457,7 @@ void AsmWriterEmitter::run(std::ostream &O) {
// To reduce code size, we compactify common instructions into a few bits
// in the opcode-indexed table.
// 16 bits to play with.
unsigned BitsLeft = 16;
unsigned BitsLeft = 32-AsmStrBits;
std::vector<std::vector<std::string> > TableDrivenOperandPrinters;
@ -501,7 +500,7 @@ void AsmWriterEmitter::run(std::ostream &O) {
O<<" static const unsigned OpInfo[] = {\n";
for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) {
O << " " << OpcodeInfo[i] << ",\t// "
O << " " << OpcodeInfo[i] << "U,\t// "
<< NumberedInstructions[i]->TheDef->getName() << "\n";
}
// Add a dummy entry so the array init doesn't end with a comma.
@ -548,7 +547,7 @@ void AsmWriterEmitter::run(std::ostream &O) {
<< " O << AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << ");\n\n";
// Output the table driven operand information.
BitsLeft = 16;
BitsLeft = 32-AsmStrBits;
for (unsigned i = 0, e = TableDrivenOperandPrinters.size(); i != e; ++i) {
std::vector<std::string> &Commands = TableDrivenOperandPrinters[i];
@ -595,12 +594,15 @@ void AsmWriterEmitter::run(std::ostream &O) {
// elements in the vector.
std::reverse(Instructions.begin(), Instructions.end());
// Find the opcode # of inline asm
O << " switch (MI->getOpcode()) {\n";
while (!Instructions.empty())
EmitInstructions(Instructions, O);
if (!Instructions.empty()) {
// Find the opcode # of inline asm.
O << " switch (MI->getOpcode()) {\n";
while (!Instructions.empty())
EmitInstructions(Instructions, O);
O << " }\n"
" return true;\n"
O << " }\n";
}
O << " return true;\n"
"}\n";
}