#include "llvm/Target/TargetInstrInfo.h"
using namespace llvm;
-DFAPacketizer::DFAPacketizer(const InstrItineraryData *I,
- const DFAStateInput (*SIT)[2],
+DFAPacketizer::DFAPacketizer(const InstrItineraryData *I, const int (*SIT)[2],
const unsigned *SET):
InstrItins(I), CurrentState(0), DFAStateInputTable(SIT),
- DFAStateEntryTable(SET) {
- // Make sure DFA types are large enough for the number of terms & resources.
- assert((DFA_MAX_RESTERMS * DFA_MAX_RESOURCES) <= (8 * sizeof(DFAInput))
- && "(DFA_MAX_RESTERMS * DFA_MAX_RESOURCES) too big for DFAInput");
- assert((DFA_MAX_RESTERMS * DFA_MAX_RESOURCES) <= (8 * sizeof(DFAStateInput))
- && "(DFA_MAX_RESTERMS * DFA_MAX_RESOURCES) too big for DFAStateInput");
-}
+ DFAStateEntryTable(SET) {}
//
DFAStateInputTable[i][1];
}
-//
-// getInsnInput - Return the DFAInput for an instruction class.
-//
-DFAInput DFAPacketizer::getInsnInput(unsigned InsnClass) {
- // note: this logic must match that in DFAPacketizer.h for input vectors
- DFAInput InsnInput = 0;
- unsigned i = 0;
- for (const InstrStage *IS = InstrItins->beginStage(InsnClass),
- *IE = InstrItins->endStage(InsnClass); IS != IE; ++IS, ++i) {
- unsigned FuncUnits = IS->getUnits();
- InsnInput <<= DFA_MAX_RESOURCES; // Shift over any previous AND'ed terms.
- InsnInput |= FuncUnits;
- assert ((i < DFA_MAX_RESTERMS) && "Exceeded maximum number of DFA inputs");
- }
-
- return InsnInput;
-}
// canReserveResources - Check if the resources occupied by a MCInstrDesc
// are available in the current state.
bool DFAPacketizer::canReserveResources(const llvm::MCInstrDesc *MID) {
unsigned InsnClass = MID->getSchedClass();
- DFAInput InsnInput = getInsnInput(InsnClass);
- UnsignPair StateTrans = UnsignPair(CurrentState, InsnInput);
+ const llvm::InstrStage *IS = InstrItins->beginStage(InsnClass);
+ unsigned FuncUnits = IS->getUnits();
+ UnsignPair StateTrans = UnsignPair(CurrentState, FuncUnits);
ReadTable(CurrentState);
return (CachedTable.count(StateTrans) != 0);
}
+
// reserveResources - Reserve the resources occupied by a MCInstrDesc and
// change the current state to reflect that change.
void DFAPacketizer::reserveResources(const llvm::MCInstrDesc *MID) {
unsigned InsnClass = MID->getSchedClass();
- DFAInput InsnInput = getInsnInput(InsnClass);
- UnsignPair StateTrans = UnsignPair(CurrentState, InsnInput);
+ const llvm::InstrStage *IS = InstrItins->beginStage(InsnClass);
+ unsigned FuncUnits = IS->getUnits();
+ UnsignPair StateTrans = UnsignPair(CurrentState, FuncUnits);
ReadTable(CurrentState);
assert(CachedTable.count(StateTrans) != 0);
CurrentState = CachedTable[StateTrans];