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//===- 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
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Declarations that describe the ARM register file
//===----------------------------------------------------------------------===//
// Registers are identified with 4-bit ID numbers.
class ARMReg<bits<4> num, string n, list<Register> aliases = []> : Register<n> {
field bits<4> Num;
let Namespace = "ARM";
let Aliases = aliases;
}
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 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]>;
// Register classes.
//
// pc == Program Counter
// lr == Link Register
// sp == Stack Pointer
// r12 == ip (scratch)
// r7 == Frame Pointer (thumb-style backtraces)
// r11 == Frame Pointer (arm-style backtraces)
// r10 == Stack Limit
//
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 = [{
// FP is R11, R9 is available.
static const unsigned ARM_GPR_AO_1[] = {
ARM::R3, ARM::R2, ARM::R1, ARM::R0,
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::R3, ARM::R2, ARM::R1, ARM::R0,
ARM::R12,ARM::LR,
ARM::R4, ARM::R5, ARM::R6, ARM::R7,
ARM::R8, ARM::R10,
ARM::R11 };
// FP is R7, R9 is available.
static const unsigned ARM_GPR_AO_3[] = {
ARM::R3, ARM::R2, ARM::R1, ARM::R0,
ARM::R12,ARM::LR,
ARM::R4, ARM::R5, ARM::R6,
ARM::R8, ARM::R9, ARM::R10,ARM::R11,
ARM::R7 };
// FP is R7, R9 is not available.
static const unsigned ARM_GPR_AO_4[] = {
ARM::R3, ARM::R2, ARM::R1, ARM::R0,
ARM::R12,ARM::LR,
ARM::R4, ARM::R5, ARM::R6,
ARM::R8, ARM::R10,ARM::R11,
ARM::R7 };
// FP is R7, only low registers available.
static const unsigned THUMB_GPR_AO[] = {
ARM::R2, ARM::R1, ARM::R0,
ARM::R4, ARM::R5, ARM::R6, 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.isThumb())
return THUMB_GPR_AO;
if (Subtarget.useThumbBacktraces()) {
if (Subtarget.isR9Reserved())
return ARM_GPR_AO_4;
else
return ARM_GPR_AO_3;
} else {
if (Subtarget.isR9Reserved())
return ARM_GPR_AO_2;
else
return ARM_GPR_AO_1;
}
}
GPRClass::iterator
GPRClass::allocation_order_end(const MachineFunction &MF) const {
const TargetMachine &TM = MF.getTarget();
const MRegisterInfo *RI = TM.getRegisterInfo();
const ARMSubtarget &Subtarget = TM.getSubtarget<ARMSubtarget>();
GPRClass::iterator I;
if (Subtarget.isThumb())
I = THUMB_GPR_AO + (sizeof(THUMB_GPR_AO)/sizeof(unsigned));
else if (Subtarget.useThumbBacktraces()) {
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 {
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;
}
}];
}
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]>;
// ARM requires only word alignment for double. It's more performant if it
// is double-word alignment though.
def DPR : RegisterClass<"ARM", [f64], 64, [D0, D1, D2, D3, D4, D5, D6, D7, D8,
D9, D10, D11, D12, D13, D14, D15]>;
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