class ARMDecoderEmitter::ARMDEBackend {
public:
- ARMDEBackend(ARMDecoderEmitter &frontend) :
+ ARMDEBackend(ARMDecoderEmitter &frontend, RecordKeeper &Records) :
NumberedInstructions(),
Opcodes(),
Frontend(frontend),
- Target(),
+ Target(Records),
FC(NULL)
{
if (Target.getName() == "ARM")
TARGET_NAME_t TargetName;
};
-bool ARMDecoderEmitter::ARMDEBackend::populateInstruction(
- const CodeGenInstruction &CGI, TARGET_NAME_t TN) {
+bool ARMDecoderEmitter::
+ARMDEBackend::populateInstruction(const CodeGenInstruction &CGI,
+ TARGET_NAME_t TN) {
const Record &Def = *CGI.TheDef;
const StringRef Name = Def.getName();
uint8_t Form = getByteField(Def, "Form");
// which is a better design and less fragile than the name matchings.
if (Bits.allInComplete()) return false;
+ // Ignore "asm parser only" instructions.
+ if (Def.getValueAsBit("isAsmParserOnly"))
+ return false;
+
if (TN == TARGET_ARM) {
// FIXME: what about Int_MemBarrierV6 and Int_SyncBarrierV6?
if ((Name != "Int_MemBarrierV7" && Name != "Int_SyncBarrierV7") &&
return false;
if (thumbInstruction(Form))
return false;
- if (Name.find("CMPz") != std::string::npos /* ||
- Name.find("CMNz") != std::string::npos */)
- return false;
// Tail calls are other patterns that generate existing instructions.
if (Name == "TCRETURNdi" || Name == "TCRETURNdiND" ||
Name == "MOVr_TC")
return false;
- // VLDMQ/VSTMQ can be handled with the more generic VLDMD/VSTMD.
- if (Name == "VLDMQ" || Name == "VLDMQ_UPD" ||
- Name == "VSTMQ" || Name == "VSTMQ_UPD")
- return false;
-
//
// The following special cases are for conflict resolutions.
//
Name == "VNEGScc")
return false;
- // Ignore the *_sfp instructions when decoding. They are used by the
- // compiler to implement scalar floating point operations using vector
- // operations in order to work around some performance issues.
- if (Name.find("_sfp") != std::string::npos) return false;
-
// LDMIA_RET is a special case of LDM (Load Multiple) where the registers
// loaded include the PC, causing a branch to a loaded address. Ignore
// the LDMIA_RET instruction when decoding.
if (Name == "tTPsoft" || Name == "t2TPsoft")
return false;
- // Ignore tLEApcrel and tLEApcrelJT, prefer tADDrPCi.
- if (Name == "tLEApcrel" || Name == "tLEApcrelJT")
- return false;
-
- // Ignore t2LEApcrel, prefer the generic t2ADD* for disassembly printing.
- if (Name == "t2LEApcrel")
+ // Ignore tADR, prefer tADDrPCi.
+ if (Name == "tADR")
return false;
// Ignore tADDrSP, tADDspr, and tPICADD, prefer the generic tADDhirr.
// Resolve conflicts:
//
// tBfar conflicts with tBLr9
- // tCMNz conflicts with tCMN (with assembly format strings being equal)
// tPOP_RET/t2LDMIA_RET conflict with tPOP/t2LDM (ditto)
// tMOVCCi conflicts with tMOVi8
// tMOVCCr conflicts with tMOVgpr2gpr
// tSpill conflicts with tSTRspi
// tLDRcp conflicts with tLDRspi
// tRestore conflicts with tLDRspi
- // t2LEApcrelJT conflicts with t2LEApcrel
// t2MOVCCi16 conflicts with tMOVi16
if (Name == "tBfar" ||
- /* Name == "tCMNz" || */ Name == "tCMPzi8" || Name == "tCMPzr" ||
- Name == "tCMPzhir" || /* Name == "t2CMNzrr" || Name == "t2CMNzrs" ||
- Name == "t2CMNzri" || */ Name == "t2CMPzrr" || Name == "t2CMPzrs" ||
- Name == "t2CMPzri" || Name == "tPOP_RET" || Name == "t2LDMIA_RET" ||
+ Name == "tPOP_RET" || Name == "t2LDMIA_RET" ||
Name == "tMOVCCi" || Name == "tMOVCCr" ||
Name == "tSpill" || Name == "tLDRcp" || Name == "tRestore" ||
- Name == "t2LEApcrelJT" || Name == "t2MOVCCi16")
+ Name == "t2MOVCCi16")
return false;
}
- // Dumps the instruction encoding format.
- switch (TargetName) {
- case TARGET_ARM:
- case TARGET_THUMB:
- DEBUG(errs() << Name << " " << stringForARMFormat((ARMFormat)Form));
- break;
- }
-
DEBUG({
+ // Dumps the instruction encoding format.
+ switch (TargetName) {
+ case TARGET_ARM:
+ case TARGET_THUMB:
+ errs() << Name << " " << stringForARMFormat((ARMFormat)Form);
+ break;
+ }
+
errs() << " ";
// Dumps the instruction encoding bits.
void ARMDecoderEmitter::initBackend()
{
- Backend = new ARMDEBackend(*this);
+ Backend = new ARMDEBackend(*this, Records);
}
void ARMDecoderEmitter::run(raw_ostream &o)