-//===- ARMRegisterInfo.td - ARM Register defs ----------*- tablegen -*-===//
+//===- ARMRegisterInfo.td - ARM Register defs -------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the "Instituto Nokia de Tecnologia" and
-// is distributed under the University of Illinois Open Source
+// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Registers are identified with 4-bit ID numbers.
-class ARMReg<bits<4> num, string n> : Register<n> {
+class ARMReg<bits<4> num, string n, list<Register> subregs = []> : Register<n> {
field bits<4> Num;
let Namespace = "ARM";
+ let SubRegs = subregs;
+}
+
+class ARMFReg<bits<5> num, string n> : Register<n> {
+ field bits<5> Num;
+ let Namespace = "ARM";
}
// Integer registers
-def R0 : ARMReg< 0, "R0">, DwarfRegNum<0>;
-def R1 : ARMReg< 1, "R1">, DwarfRegNum<1>;
-def R2 : ARMReg< 2, "R2">, DwarfRegNum<2>;
-def R3 : ARMReg< 3, "R3">, DwarfRegNum<3>;
-def R4 : ARMReg< 4, "R4">, DwarfRegNum<4>;
-def R5 : ARMReg< 5, "R5">, DwarfRegNum<5>;
-def R6 : ARMReg< 6, "R6">, DwarfRegNum<6>;
-def R7 : ARMReg< 7, "R7">, DwarfRegNum<7>;
-def R8 : ARMReg< 8, "R8">, DwarfRegNum<8>;
-def R9 : ARMReg< 9, "R9">, DwarfRegNum<9>;
-def R10 : ARMReg<10, "R10">, DwarfRegNum<10>;
-def R11 : ARMReg<11, "R11">, DwarfRegNum<11>;
-def R12 : ARMReg<12, "R12">, DwarfRegNum<12>;
-def R13 : ARMReg<13, "R13">, DwarfRegNum<13>;
-def R14 : ARMReg<14, "R14">, DwarfRegNum<14>;
-def R15 : ARMReg<15, "R15">, DwarfRegNum<15>;
+def R0 : ARMReg< 0, "r0">, DwarfRegNum<[0]>;
+def R1 : ARMReg< 1, "r1">, DwarfRegNum<[1]>;
+def R2 : ARMReg< 2, "r2">, DwarfRegNum<[2]>;
+def R3 : ARMReg< 3, "r3">, DwarfRegNum<[3]>;
+def R4 : ARMReg< 4, "r4">, DwarfRegNum<[4]>;
+def R5 : ARMReg< 5, "r5">, DwarfRegNum<[5]>;
+def R6 : ARMReg< 6, "r6">, DwarfRegNum<[6]>;
+def R7 : ARMReg< 7, "r7">, DwarfRegNum<[7]>;
+def R8 : ARMReg< 8, "r8">, DwarfRegNum<[8]>;
+def R9 : ARMReg< 9, "r9">, DwarfRegNum<[9]>;
+def R10 : ARMReg<10, "r10">, DwarfRegNum<[10]>;
+def R11 : ARMReg<11, "r11">, DwarfRegNum<[11]>;
+def R12 : ARMReg<12, "r12">, DwarfRegNum<[12]>;
+def SP : ARMReg<13, "sp">, DwarfRegNum<[13]>;
+def LR : ARMReg<14, "lr">, DwarfRegNum<[14]>;
+def PC : ARMReg<15, "pc">, DwarfRegNum<[15]>;
+
+// Float registers
+def S0 : ARMFReg< 0, "s0">; def S1 : ARMFReg< 1, "s1">;
+def S2 : ARMFReg< 2, "s2">; def S3 : ARMFReg< 3, "s3">;
+def S4 : ARMFReg< 4, "s4">; def S5 : ARMFReg< 5, "s5">;
+def S6 : ARMFReg< 6, "s6">; def S7 : ARMFReg< 7, "s7">;
+def S8 : ARMFReg< 8, "s8">; def S9 : ARMFReg< 9, "s9">;
+def S10 : ARMFReg<10, "s10">; def S11 : ARMFReg<11, "s11">;
+def S12 : ARMFReg<12, "s12">; def S13 : ARMFReg<13, "s13">;
+def S14 : ARMFReg<14, "s14">; def S15 : ARMFReg<15, "s15">;
+def S16 : ARMFReg<16, "s16">; def S17 : ARMFReg<17, "s17">;
+def S18 : ARMFReg<18, "s18">; def S19 : ARMFReg<19, "s19">;
+def S20 : ARMFReg<20, "s20">; def S21 : ARMFReg<21, "s21">;
+def S22 : ARMFReg<22, "s22">; def S23 : ARMFReg<23, "s23">;
+def S24 : ARMFReg<24, "s24">; def S25 : ARMFReg<25, "s25">;
+def S26 : ARMFReg<26, "s26">; def S27 : ARMFReg<27, "s27">;
+def S28 : ARMFReg<28, "s28">; def S29 : ARMFReg<29, "s29">;
+def S30 : ARMFReg<30, "s30">; def S31 : ARMFReg<31, "s31">;
+
+// Aliases of the F* registers used to hold 64-bit fp values (doubles)
+def D0 : ARMReg< 0, "d0", [S0, S1]>;
+def D1 : ARMReg< 1, "d1", [S2, S3]>;
+def D2 : ARMReg< 2, "d2", [S4, S5]>;
+def D3 : ARMReg< 3, "d3", [S6, S7]>;
+def D4 : ARMReg< 4, "d4", [S8, S9]>;
+def D5 : ARMReg< 5, "d5", [S10, S11]>;
+def D6 : ARMReg< 6, "d6", [S12, S13]>;
+def D7 : ARMReg< 7, "d7", [S14, S15]>;
+def D8 : ARMReg< 8, "d8", [S16, S17]>;
+def D9 : ARMReg< 9, "d9", [S18, S19]>;
+def D10 : ARMReg<10, "d10", [S20, S21]>;
+def D11 : ARMReg<11, "d11", [S22, S23]>;
+def D12 : ARMReg<12, "d12", [S24, S25]>;
+def D13 : ARMReg<13, "d13", [S26, S27]>;
+def D14 : ARMReg<14, "d14", [S28, S29]>;
+def D15 : ARMReg<15, "d15", [S30, S31]>;
+
+// VFP3 defines 16 additional double registers
+def D16 : ARMFReg<16, "d16">; def D17 : ARMFReg<17, "d17">;
+def D18 : ARMFReg<18, "d18">; def D19 : ARMFReg<19, "d19">;
+def D20 : ARMFReg<20, "d20">; def D21 : ARMFReg<21, "d21">;
+def D22 : ARMFReg<22, "d22">; def D23 : ARMFReg<23, "d23">;
+def D24 : ARMFReg<24, "d24">; def D25 : ARMFReg<25, "d25">;
+def D26 : ARMFReg<26, "d26">; def D27 : ARMFReg<27, "d27">;
+def D28 : ARMFReg<28, "d28">; def D29 : ARMFReg<29, "d29">;
+def D30 : ARMFReg<30, "d30">; def D31 : ARMFReg<31, "d31">;
+
+// Advanced SIMD (NEON) defines 16 quad-word aliases
+def Q0 : ARMReg< 0, "q0", [D0, D1]>;
+def Q1 : ARMReg< 1, "q1", [D2, D3]>;
+def Q2 : ARMReg< 2, "q2", [D4, D5]>;
+def Q3 : ARMReg< 3, "q3", [D6, D7]>;
+def Q4 : ARMReg< 4, "q4", [D8, D9]>;
+def Q5 : ARMReg< 5, "q5", [D10, D11]>;
+def Q6 : ARMReg< 6, "q6", [D12, D13]>;
+def Q7 : ARMReg< 7, "q7", [D14, D15]>;
+def Q8 : ARMReg< 8, "q8", [D16, D17]>;
+def Q9 : ARMReg< 9, "q9", [D18, D19]>;
+def Q10 : ARMReg<10, "q10", [D20, D21]>;
+def Q11 : ARMReg<11, "q11", [D22, D23]>;
+def Q12 : ARMReg<12, "q12", [D24, D25]>;
+def Q13 : ARMReg<13, "q13", [D26, D27]>;
+def Q14 : ARMReg<14, "q14", [D28, D29]>;
+def Q15 : ARMReg<15, "q15", [D30, D31]>;
+
+// Current Program Status Register.
+def CPSR : ARMReg<0, "cpsr">;
+
+def FPSCR : ARMReg<1, "fpscr">;
// Register classes.
//
-// FIXME: the register order should be defined in terms of the preferred
-// allocation order...
+// pc == Program Counter
+// lr == Link Register
+// sp == Stack Pointer
+// r12 == ip (scratch)
+// r7 == Frame Pointer (thumb-style backtraces)
+// r9 == May be reserved as Thread Register
+// r11 == Frame Pointer (arm-style backtraces)
+// r10 == Stack Limit
//
-def IntRegs : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6,
- R7, R8, R9, R10, R11, R12,
- R13, R14, R15]> {
+def GPR : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6,
+ R7, R8, R9, R10, R12, R11,
+ LR, SP, PC]> {
let MethodProtos = [{
+ iterator allocation_order_begin(const MachineFunction &MF) const;
iterator allocation_order_end(const MachineFunction &MF) const;
}];
+ // FIXME: We are reserving r12 in case the PEI needs to use it to
+ // generate large stack offset. Make it available once we have register
+ // scavenging. Similarly r3 is reserved in Thumb mode for now.
let MethodBodies = [{
- IntRegsClass::iterator
- IntRegsClass::allocation_order_end(const MachineFunction &MF) const {
- // r15 == Program Counter
- // r14 == Link Register
- // r13 == Stack Pointer
- // r12 == ip (scratch)
- // r11 == Frame Pointer
- // r10 == Stack Limit
- return end() - 4;
+ // FP is R11, R9 is available.
+ static const unsigned ARM_GPR_AO_1[] = {
+ ARM::R0, ARM::R1, ARM::R2, ARM::R3,
+ ARM::R12,ARM::LR,
+ ARM::R4, ARM::R5, ARM::R6, ARM::R7,
+ ARM::R8, ARM::R9, ARM::R10,
+ ARM::R11 };
+ // FP is R11, R9 is not available.
+ static const unsigned ARM_GPR_AO_2[] = {
+ ARM::R0, ARM::R1, ARM::R2, ARM::R3,
+ ARM::R12,ARM::LR,
+ ARM::R4, ARM::R5, ARM::R6, ARM::R7,
+ ARM::R8, ARM::R10,
+ ARM::R11 };
+ // FP is R7, R9 is available as non-callee-saved register.
+ // This is used by Darwin.
+ static const unsigned ARM_GPR_AO_3[] = {
+ ARM::R0, ARM::R1, ARM::R2, ARM::R3,
+ ARM::R9, ARM::R12,ARM::LR,
+ ARM::R4, ARM::R5, ARM::R6,
+ ARM::R8, ARM::R10,ARM::R11,ARM::R7 };
+ // FP is R7, R9 is not available.
+ static const unsigned ARM_GPR_AO_4[] = {
+ ARM::R0, ARM::R1, ARM::R2, ARM::R3,
+ ARM::R12,ARM::LR,
+ ARM::R4, ARM::R5, ARM::R6,
+ ARM::R8, ARM::R10,ARM::R11,
+ ARM::R7 };
+ // FP is R7, R9 is available as callee-saved register.
+ // This is used by non-Darwin platform in Thumb mode.
+ static const unsigned ARM_GPR_AO_5[] = {
+ ARM::R0, ARM::R1, ARM::R2, ARM::R3,
+ ARM::R12,ARM::LR,
+ ARM::R4, ARM::R5, ARM::R6,
+ ARM::R8, ARM::R9, ARM::R10,ARM::R11,ARM::R7 };
+
+ GPRClass::iterator
+ GPRClass::allocation_order_begin(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
+ if (Subtarget.isTargetDarwin()) {
+ if (Subtarget.isR9Reserved())
+ return ARM_GPR_AO_4;
+ else
+ return ARM_GPR_AO_3;
+ } else {
+ if (Subtarget.isR9Reserved())
+ return ARM_GPR_AO_2;
+ else if (Subtarget.isThumb())
+ return ARM_GPR_AO_5;
+ else
+ return ARM_GPR_AO_1;
+ }
+ }
+
+ GPRClass::iterator
+ GPRClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const TargetRegisterInfo *RI = TM.getRegisterInfo();
+ const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
+ GPRClass::iterator I;
+
+ if (Subtarget.isTargetDarwin()) {
+ if (Subtarget.isR9Reserved())
+ I = ARM_GPR_AO_4 + (sizeof(ARM_GPR_AO_4)/sizeof(unsigned));
+ else
+ I = ARM_GPR_AO_3 + (sizeof(ARM_GPR_AO_3)/sizeof(unsigned));
+ } else {
+ if (Subtarget.isR9Reserved())
+ I = ARM_GPR_AO_2 + (sizeof(ARM_GPR_AO_2)/sizeof(unsigned));
+ else if (Subtarget.isThumb())
+ I = ARM_GPR_AO_5 + (sizeof(ARM_GPR_AO_5)/sizeof(unsigned));
+ else
+ I = ARM_GPR_AO_1 + (sizeof(ARM_GPR_AO_1)/sizeof(unsigned));
+ }
+
+ // Mac OS X requires FP not to be clobbered for backtracing purpose.
+ return (Subtarget.isTargetDarwin() || RI->hasFP(MF)) ? I-1 : I;
}
}];
}
+
+// Thumb registers are R0-R7 normally. Some instructions can still use
+// the general GPR register class above (MOV, e.g.)
+def tGPR : RegisterClass<"ARM", [i32], 32, [R0, R1, R2, R3, R4, R5, R6, R7]> {
+ let MethodProtos = [{
+ iterator allocation_order_begin(const MachineFunction &MF) const;
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ // FIXME: We are reserving r3 in Thumb mode in case the PEI needs to use it
+ // to generate large stack offset. Make it available once we have register
+ // scavenging.
+ let MethodBodies = [{
+ static const unsigned THUMB_tGPR_AO[] = {
+ ARM::R0, ARM::R1, ARM::R2,
+ ARM::R4, ARM::R5, ARM::R6, ARM::R7 };
+
+ // FP is R7, only low registers available.
+ tGPRClass::iterator
+ tGPRClass::allocation_order_begin(const MachineFunction &MF) const {
+ return THUMB_tGPR_AO;
+ }
+
+ tGPRClass::iterator
+ tGPRClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const TargetRegisterInfo *RI = TM.getRegisterInfo();
+ const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
+ tGPRClass::iterator I =
+ THUMB_tGPR_AO + (sizeof(THUMB_tGPR_AO)/sizeof(unsigned));
+ // Mac OS X requires FP not to be clobbered for backtracing purpose.
+ return (Subtarget.isTargetDarwin() || RI->hasFP(MF)) ? I-1 : I;
+ }
+ }];
+}
+
+// Scalar single precision floating point register class..
+def SPR : RegisterClass<"ARM", [f32], 32, [S0, S1, S2, S3, S4, S5, S6, S7, S8,
+ S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22,
+ S23, S24, S25, S26, S27, S28, S29, S30, S31]>;
+
+// Scalar double precision floating point / generic 64-bit vector register
+// class.
+// ARM requires only word alignment for double. It's more performant if it
+// is double-word alignment though.
+def DPR : RegisterClass<"ARM", [f64, v8i8, v4i16, v2i32, v1i64, v2f32], 64,
+ [D0, D1, D2, D3, D4, D5, D6, D7,
+ D8, D9, D10, D11, D12, D13, D14, D15,
+ D16, D17, D18, D19, D20, D21, D22, D23,
+ D24, D25, D26, D27, D28, D29, D30, D31]> {
+ let SubRegClassList = [SPR, SPR];
+ let MethodProtos = [{
+ iterator allocation_order_begin(const MachineFunction &MF) const;
+ iterator allocation_order_end(const MachineFunction &MF) const;
+ }];
+ let MethodBodies = [{
+ // VFP2
+ static const unsigned ARM_DPR_VFP2[] = {
+ ARM::D0, ARM::D1, ARM::D2, ARM::D3,
+ ARM::D4, ARM::D5, ARM::D6, ARM::D7,
+ ARM::D8, ARM::D9, ARM::D10, ARM::D11,
+ ARM::D12, ARM::D13, ARM::D14, ARM::D15 };
+ // VFP3
+ static const unsigned ARM_DPR_VFP3[] = {
+ ARM::D0, ARM::D1, ARM::D2, ARM::D3,
+ ARM::D4, ARM::D5, ARM::D6, ARM::D7,
+ ARM::D8, ARM::D9, ARM::D10, ARM::D11,
+ ARM::D12, ARM::D13, ARM::D14, ARM::D15,
+ ARM::D16, ARM::D17, ARM::D18, ARM::D19,
+ ARM::D20, ARM::D21, ARM::D22, ARM::D23,
+ ARM::D24, ARM::D25, ARM::D26, ARM::D27,
+ ARM::D28, ARM::D29, ARM::D30, ARM::D31 };
+ DPRClass::iterator
+ DPRClass::allocation_order_begin(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
+ if (Subtarget.hasVFP3())
+ return ARM_DPR_VFP3;
+ return ARM_DPR_VFP2;
+ }
+
+ DPRClass::iterator
+ DPRClass::allocation_order_end(const MachineFunction &MF) const {
+ const TargetMachine &TM = MF.getTarget();
+ const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
+ if (Subtarget.hasVFP3())
+ return ARM_DPR_VFP3 + (sizeof(ARM_DPR_VFP3)/sizeof(unsigned));
+ else
+ return ARM_DPR_VFP2 + (sizeof(ARM_DPR_VFP2)/sizeof(unsigned));
+ }
+ }];
+}
+
+// Generic 128-bit vector register class.
+def QPR : RegisterClass<"ARM", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], 128,
+ [Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7,
+ Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15]> {
+ let SubRegClassList = [SPR, SPR, SPR, SPR, DPR, DPR];
+}
+
+// Condition code registers.
+def CCR : RegisterClass<"ARM", [i32], 32, [CPSR]>;
+
+//===----------------------------------------------------------------------===//
+// Subregister Set Definitions... now that we have all of the pieces, define the
+// sub registers for each register.
+//
+
+def arm_ssubreg_0 : PatLeaf<(i32 1)>;
+def arm_ssubreg_1 : PatLeaf<(i32 2)>;
+def arm_ssubreg_2 : PatLeaf<(i32 3)>;
+def arm_ssubreg_3 : PatLeaf<(i32 4)>;
+def arm_dsubreg_0 : PatLeaf<(i32 5)>;
+def arm_dsubreg_1 : PatLeaf<(i32 6)>;
+
+// S sub-registers of D registers.
+def : SubRegSet<1, [D0, D1, D2, D3, D4, D5, D6, D7,
+ D8, D9, D10, D11, D12, D13, D14, D15],
+ [S0, S2, S4, S6, S8, S10, S12, S14,
+ S16, S18, S20, S22, S24, S26, S28, S30]>;
+def : SubRegSet<2, [D0, D1, D2, D3, D4, D5, D6, D7,
+ D8, D9, D10, D11, D12, D13, D14, D15],
+ [S1, S3, S5, S7, S9, S11, S13, S15,
+ S17, S19, S21, S23, S25, S27, S29, S31]>;
+
+// S sub-registers of Q registers.
+def : SubRegSet<1, [Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7],
+ [S0, S4, S8, S12, S16, S20, S24, S28]>;
+def : SubRegSet<2, [Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7],
+ [S1, S5, S9, S13, S17, S21, S25, S29]>;
+def : SubRegSet<3, [Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7],
+ [S2, S6, S10, S14, S18, S22, S26, S30]>;
+def : SubRegSet<4, [Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7],
+ [S3, S7, S11, S15, S19, S23, S27, S31]>;
+
+// D sub-registers of Q registers.
+def : SubRegSet<5, [Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7,
+ Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15],
+ [D0, D2, D4, D6, D8, D10, D12, D14,
+ D16, D18, D20, D22, D24, D26, D28, D30]>;
+def : SubRegSet<6, [Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7,
+ Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15],
+ [D1, D3, D5, D7, D9, D11, D13, D15,
+ D17, D19, D21, D23, D25, D27, D29, D31]>;
+
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