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[mips] Add support for calling convention CC_MipsO32_FP64, which is used when the

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size of floating point registers is 64-bit.

Test case will be added when support for mfhc1 and mthc1 is added.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188847 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2013-08-20 23:38:40 +00:00
parent c89cb45ecb
commit ad341d48f0
6 changed files with 70 additions and 32 deletions

20
lib/Target/Mips/MipsCallingConv.td

@ -26,8 +26,10 @@ def RetCC_MipsO32 : CallingConv<[
// f32 are returned in registers F0, F2
CCIfType<[f32], CCAssignToReg<[F0, F2]>>,
// f64 are returned in register D0, D1
CCIfType<[f64], CCAssignToReg<[D0, D1]>>
// f64 arguments are returned in D0_64 and D1_64 in FP64bit mode or
// in D0 and D1 in FP32bit mode.
CCIfType<[f64], CCIfSubtarget<"isFP64bit()", CCAssignToReg<[D0_64, D1_64]>>>,
CCIfType<[f64], CCIfSubtarget<"isNotFP64bit()", CCAssignToReg<[D0, D1]>>>
]>;
//===----------------------------------------------------------------------===//
@ -149,7 +151,16 @@ def RetCC_MipsEABI : CallingConv<[
//===----------------------------------------------------------------------===//
def CC_MipsO32_FastCC : CallingConv<[
// f64 arguments are passed in double-precision floating pointer registers.
CCIfType<[f64], CCAssignToReg<[D0, D1, D2, D3, D4, D5, D6, D7, D8, D9]>>,
CCIfType<[f64], CCIfSubtarget<"isNotFP64bit()",
CCAssignToReg<[D0, D1, D2, D3, D4, D5, D6, D7,
D8, D9]>>>,
CCIfType<[f64], CCIfSubtarget<"isFP64bit()",
CCAssignToReg<[D0_64, D1_64, D2_64, D3_64,
D4_64, D5_64, D6_64, D7_64,
D8_64, D9_64, D10_64, D11_64,
D12_64, D13_64, D14_64, D15_64,
D16_64, D17_64, D18_64,
D19_64]>>>,
// Stack parameter slots for f64 are 64-bit doublewords and 8-byte aligned.
CCIfType<[f64], CCAssignToStack<8, 8>>
@ -224,6 +235,9 @@ def CSR_SingleFloatOnly : CalleeSavedRegs<(add (sequence "F%u", 31, 20), RA, FP,
def CSR_O32 : CalleeSavedRegs<(add (sequence "D%u", 15, 10), RA, FP,
(sequence "S%u", 7, 0))>;
def CSR_O32_FP64 : CalleeSavedRegs<(add (sequence "D%u_64", 31, 20), RA, FP,
(sequence "S%u", 7, 0))>;
def CSR_N32 : CalleeSavedRegs<(add D31_64, D29_64, D27_64, D25_64, D24_64,
D23_64, D22_64, D21_64, RA_64, FP_64, GP_64,
(sequence "S%u_64", 7, 0))>;

42
lib/Target/Mips/MipsISelLowering.cpp

@ -2119,7 +2119,8 @@ SDValue MipsTargetLowering::lowerFP_TO_SINT(SDValue Op,
static bool CC_MipsO32(unsigned ValNo, MVT ValVT,
MVT LocVT, CCValAssign::LocInfo LocInfo,
ISD::ArgFlagsTy ArgFlags, CCState &State) {
ISD::ArgFlagsTy ArgFlags, CCState &State,
const uint16_t *F64Regs) {
static const unsigned IntRegsSize=4, FloatRegsSize=2;
@ -2129,9 +2130,6 @@ static bool CC_MipsO32(unsigned ValNo, MVT ValVT,
static const uint16_t F32Regs[] = {
Mips::F12, Mips::F14
};
static const uint16_t F64Regs[] = {
Mips::D6, Mips::D7
};
// Do not process byval args here.
if (ArgFlags.isByVal())
@ -2200,6 +2198,22 @@ static bool CC_MipsO32(unsigned ValNo, MVT ValVT,
return false;
}
static bool CC_MipsO32_FP32(unsigned ValNo, MVT ValVT,
MVT LocVT, CCValAssign::LocInfo LocInfo,
ISD::ArgFlagsTy ArgFlags, CCState &State) {
static const uint16_t F64Regs[] = { Mips::D6, Mips::D7 };
return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State, F64Regs);
}
static bool CC_MipsO32_FP64(unsigned ValNo, MVT ValVT,
MVT LocVT, CCValAssign::LocInfo LocInfo,
ISD::ArgFlagsTy ArgFlags, CCState &State) {
static const uint16_t F64Regs[] = { Mips::D12_64, Mips::D12_64 };
return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State, F64Regs);
}
#include "MipsGenCallingConv.inc"
//===----------------------------------------------------------------------===//
@ -2312,7 +2326,8 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
getTargetMachine(), ArgLocs, *DAG.getContext());
MipsCC::SpecialCallingConvType SpecialCallingConv =
getSpecialCallingConv(Callee);
MipsCC MipsCCInfo(CallConv, IsO32, CCInfo, SpecialCallingConv);
MipsCC MipsCCInfo(CallConv, IsO32, Subtarget->isFP64bit(), CCInfo,
SpecialCallingConv);
MipsCCInfo.analyzeCallOperands(Outs, IsVarArg,
getTargetMachine().Options.UseSoftFloat,
@ -2499,7 +2514,7 @@ MipsTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
SmallVector<CCValAssign, 16> RVLocs;
CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
getTargetMachine(), RVLocs, *DAG.getContext());
MipsCC MipsCCInfo(CallConv, IsO32, CCInfo);
MipsCC MipsCCInfo(CallConv, IsO32, Subtarget->isFP64bit(), CCInfo);
MipsCCInfo.analyzeCallResult(Ins, getTargetMachine().Options.UseSoftFloat,
CallNode, RetTy);
@ -2546,7 +2561,7 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain,
SmallVector<CCValAssign, 16> ArgLocs;
CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
getTargetMachine(), ArgLocs, *DAG.getContext());
MipsCC MipsCCInfo(CallConv, IsO32, CCInfo);
MipsCC MipsCCInfo(CallConv, IsO32, Subtarget->isFP64bit(), CCInfo);
Function::const_arg_iterator FuncArg =
DAG.getMachineFunction().getFunction()->arg_begin();
bool UseSoftFloat = getTargetMachine().Options.UseSoftFloat;
@ -2590,7 +2605,8 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain,
else if (RegVT == MVT::f32)
RC = &Mips::FGR32RegClass;
else if (RegVT == MVT::f64)
RC = HasMips64 ? &Mips::FGR64RegClass : &Mips::AFGR64RegClass;
RC = Subtarget->isFP64bit() ? &Mips::FGR64RegClass :
&Mips::AFGR64RegClass;
else
llvm_unreachable("RegVT not supported by FormalArguments Lowering");
@ -2705,7 +2721,7 @@ MipsTargetLowering::LowerReturn(SDValue Chain,
// CCState - Info about the registers and stack slot.
CCState CCInfo(CallConv, IsVarArg, MF, getTargetMachine(), RVLocs,
*DAG.getContext());
MipsCC MipsCCInfo(CallConv, IsO32, CCInfo);
MipsCC MipsCCInfo(CallConv, IsO32, Subtarget->isFP64bit(), CCInfo);
// Analyze return values.
MipsCCInfo.analyzeReturn(Outs, getTargetMachine().Options.UseSoftFloat,
@ -3178,9 +3194,9 @@ MipsTargetLowering::MipsCC::SpecialCallingConvType
}
MipsTargetLowering::MipsCC::MipsCC(
CallingConv::ID CC, bool IsO32_, CCState &Info,
CallingConv::ID CC, bool IsO32_, bool IsFP64_, CCState &Info,
MipsCC::SpecialCallingConvType SpecialCallingConv_)
: CCInfo(Info), CallConv(CC), IsO32(IsO32_),
: CCInfo(Info), CallConv(CC), IsO32(IsO32_), IsFP64(IsFP64_),
SpecialCallingConv(SpecialCallingConv_){
// Pre-allocate reserved argument area.
CCInfo.AllocateStack(reservedArgArea(), 1);
@ -3336,11 +3352,11 @@ llvm::CCAssignFn *MipsTargetLowering::MipsCC::fixedArgFn() const {
if (SpecialCallingConv == Mips16RetHelperConv)
return CC_Mips16RetHelper;
return IsO32 ? CC_MipsO32 : CC_MipsN;
return IsO32 ? (IsFP64 ? CC_MipsO32_FP64 : CC_MipsO32_FP32) : CC_MipsN;
}
llvm::CCAssignFn *MipsTargetLowering::MipsCC::varArgFn() const {
return IsO32 ? CC_MipsO32 : CC_MipsN_VarArg;
return IsO32 ? (IsFP64 ? CC_MipsO32_FP64 : CC_MipsO32_FP32) : CC_MipsN_VarArg;
}
const uint16_t *MipsTargetLowering::MipsCC::shadowRegs() const {

7
lib/Target/Mips/MipsISelLowering.h

@ -244,9 +244,8 @@ namespace llvm {
Mips16RetHelperConv, NoSpecialCallingConv
};
MipsCC(
CallingConv::ID CallConv, bool IsO32, CCState &Info,
SpecialCallingConvType SpecialCallingConv = NoSpecialCallingConv);
MipsCC(CallingConv::ID CallConv, bool IsO32, bool IsFP64, CCState &Info,
SpecialCallingConvType SpecialCallingConv = NoSpecialCallingConv);
void analyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
@ -319,7 +318,7 @@ namespace llvm {
CCState &CCInfo;
CallingConv::ID CallConv;
bool IsO32;
bool IsO32, IsFP64;
SpecialCallingConvType SpecialCallingConv;
SmallVector<ByValArgInfo, 2> ByValArgs;
};

30
lib/Target/Mips/MipsRegisterInfo.cpp

@ -83,26 +83,34 @@ const uint16_t* MipsRegisterInfo::
getCalleeSavedRegs(const MachineFunction *MF) const {
if (Subtarget.isSingleFloat())
return CSR_SingleFloatOnly_SaveList;
else if (!Subtarget.hasMips64())
return CSR_O32_SaveList;
else if (Subtarget.isABI_N32())
if (Subtarget.isABI_N64())
return CSR_N64_SaveList;
if (Subtarget.isABI_N32())
return CSR_N32_SaveList;
assert(Subtarget.isABI_N64());
return CSR_N64_SaveList;
if (Subtarget.isFP64bit())
return CSR_O32_FP64_SaveList;
return CSR_O32_SaveList;
}
const uint32_t*
MipsRegisterInfo::getCallPreservedMask(CallingConv::ID) const {
if (Subtarget.isSingleFloat())
return CSR_SingleFloatOnly_RegMask;
else if (!Subtarget.hasMips64())
return CSR_O32_RegMask;
else if (Subtarget.isABI_N32())
if (Subtarget.isABI_N64())
return CSR_N64_RegMask;
if (Subtarget.isABI_N32())
return CSR_N32_RegMask;
assert(Subtarget.isABI_N64());
return CSR_N64_RegMask;
if (Subtarget.isFP64bit())
return CSR_O32_FP64_RegMask;
return CSR_O32_RegMask;
}
const uint32_t *MipsRegisterInfo::getMips16RetHelperMask() {
@ -128,7 +136,7 @@ getReservedRegs(const MachineFunction &MF) const {
for (unsigned I = 0; I < array_lengthof(ReservedGPR64); ++I)
Reserved.set(ReservedGPR64[I]);
if (Subtarget.hasMips64()) {
if (Subtarget.isFP64bit()) {
// Reserve all registers in AFGR64.
for (RegIter Reg = Mips::AFGR64RegClass.begin(),
EReg = Mips::AFGR64RegClass.end(); Reg != EReg; ++Reg)

2
lib/Target/Mips/MipsSEISelLowering.cpp

@ -92,7 +92,7 @@ MipsSETargetLowering::MipsSETargetLowering(MipsTargetMachine &TM)
// When dealing with single precision only, use libcalls
if (!Subtarget->isSingleFloat()) {
if (HasMips64)
if (Subtarget->isFP64bit())
addRegisterClass(MVT::f64, &Mips::FGR64RegClass);
else
addRegisterClass(MVT::f64, &Mips::AFGR64RegClass);

1
lib/Target/Mips/MipsSubtarget.h

@ -160,6 +160,7 @@ public:
bool isLittle() const { return IsLittle; }
bool isFP64bit() const { return IsFP64bit; }
bool isNotFP64bit() const { return !IsFP64bit; }
bool isGP64bit() const { return IsGP64bit; }
bool isGP32bit() const { return !IsGP64bit; }
bool isSingleFloat() const { return IsSingleFloat; }