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This patch adds the register class for MIPS16 as well as the ability for

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llc to recognize MIPS16 as a MIPS ASE extension. -mips16 will mean the
mips16 ASE for mips32 by default.

As part of fixing of adding this we discovered some small changes that
need to be made to MipsInstrInfo::storeRegToStackSLot and
MipsInstrInfo::loadRegFromStackSlot. We were using some "==" equality tests
where in fact we should have been using Mips::<regclas>.hasSubClassEQ instead,
per suggestion of Jakob Stoklund Olesen.

Patch by Reed Kotler.

llvm-svn: 156958
This commit is contained in:
Akira Hatanaka 2012-05-16 22:19:56 +00:00
parent 4c15973dff
commit 8d41be902b
5 changed files with 26 additions and 11 deletions
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4
lib/Target/Mips/Mips.td
View File

@ -72,6 +72,9 @@ def FeatureMips64r2 : SubtargetFeature<"mips64r2", "MipsArchVersion",
"Mips64r2", "Mips64r2 ISA Support",
[FeatureMips64, FeatureMips32r2]>;
def FeatureMips16 : SubtargetFeature<"mips16", "InMips16Mode", "true",
"Mips16 mode">;
//===----------------------------------------------------------------------===//
// Mips processors supported.
//===----------------------------------------------------------------------===//
@ -83,6 +86,7 @@ def : Proc<"mips32", [FeatureMips32]>;
def : Proc<"mips32r2", [FeatureMips32r2]>;
def : Proc<"mips64", [FeatureMips64]>;
def : Proc<"mips64r2", [FeatureMips64r2]>;
def : Proc<"mips16", [FeatureMips16]>;
def MipsAsmWriter : AsmWriter {
string AsmWriterClassName = "InstPrinter";

20
lib/Target/Mips/MipsInstrInfo.cpp
View File

@ -189,15 +189,15 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned Opc = 0;
if (RC == &Mips::CPURegsRegClass)
if (Mips::CPURegsRegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::SW_P8 : Mips::SW;
else if (RC == &Mips::CPU64RegsRegClass)
else if (Mips::CPU64RegsRegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::SD_P8 : Mips::SD;
else if (RC == &Mips::FGR32RegClass)
else if (Mips::FGR32RegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::SWC1_P8 : Mips::SWC1;
else if (RC == &Mips::AFGR64RegClass)
else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
Opc = Mips::SDC1;
else if (RC == &Mips::FGR64RegClass)
else if (Mips::FGR64RegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::SDC164_P8 : Mips::SDC164;
assert(Opc && "Register class not handled!");
@ -216,15 +216,15 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOLoad);
unsigned Opc = 0;
if (RC == &Mips::CPURegsRegClass)
if (Mips::CPURegsRegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::LW_P8 : Mips::LW;
else if (RC == &Mips::CPU64RegsRegClass)
else if (Mips::CPU64RegsRegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::LD_P8 : Mips::LD;
else if (RC == &Mips::FGR32RegClass)
else if (Mips::FGR32RegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::LWC1_P8 : Mips::LWC1;
else if (RC == &Mips::AFGR64RegClass)
else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
Opc = Mips::LDC1;
else if (RC == &Mips::FGR64RegClass)
else if (Mips::FGR64RegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::LDC164_P8 : Mips::LDC164;
assert(Opc && "Register class not handled!");

7
lib/Target/Mips/MipsRegisterInfo.td
View File

@ -265,6 +265,13 @@ def CPU64Regs : RegisterClass<"Mips", [i64], 64, (add
// Reserved
ZERO_64, AT_64, K0_64, K1_64, GP_64, SP_64, FP_64, RA_64)>;
def CPU16Regs : RegisterClass<"Mips", [i32], 32, (add
// Return Values and Arguments
V0, V1, A0, A1, A2, A3,
// Callee save
S0, S1)>;
// 64bit fp:
// * FGR64 - 32 64-bit registers
// * AFGR64 - 16 32-bit even registers (32-bit FP Mode)

2
lib/Target/Mips/MipsSubtarget.cpp
View File

@ -30,7 +30,7 @@ MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
MipsArchVersion(Mips32), MipsABI(UnknownABI), IsLittle(little),
IsSingleFloat(false), IsFP64bit(false), IsGP64bit(false), HasVFPU(false),
IsLinux(true), HasSEInReg(false), HasCondMov(false), HasMulDivAdd(false),
HasMinMax(false), HasSwap(false), HasBitCount(false)
HasMinMax(false), HasSwap(false), HasBitCount(false), InMips16Mode(false)
{
std::string CPUName = CPU;
if (CPUName.empty())

4
lib/Target/Mips/MipsSubtarget.h
View File

@ -86,6 +86,9 @@ protected:
// HasBitCount - Count leading '1' and '0' bits.
bool HasBitCount;
// InMips16 -- can process Mips16 instructions
bool InMips16Mode;
InstrItineraryData InstrItins;
public:
@ -124,6 +127,7 @@ public:
bool isSingleFloat() const { return IsSingleFloat; }
bool isNotSingleFloat() const { return !IsSingleFloat; }
bool hasVFPU() const { return HasVFPU; }
bool inMips16Mode() const { return InMips16Mode; }
bool isLinux() const { return IsLinux; }
/// Features related to the presence of specific instructions.