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390 lines
15 KiB
TableGen
390 lines
15 KiB
TableGen
//===- PPCRegisterInfo.td - The PowerPC Register File ------*- tablegen -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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//
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//===----------------------------------------------------------------------===//
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let Namespace = "PPC" in {
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def sub_lt : SubRegIndex;
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def sub_gt : SubRegIndex;
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def sub_eq : SubRegIndex;
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def sub_un : SubRegIndex;
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def sub_32 : SubRegIndex;
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}
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class PPCReg<string n> : Register<n> {
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let Namespace = "PPC";
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}
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// We identify all our registers with a 5-bit ID, for consistency's sake.
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// GPR - One of the 32 32-bit general-purpose registers
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class GPR<bits<5> num, string n> : PPCReg<n> {
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field bits<5> Num = num;
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}
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// GP8 - One of the 32 64-bit general-purpose registers
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class GP8<GPR SubReg, string n> : PPCReg<n> {
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field bits<5> Num = SubReg.Num;
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let SubRegs = [SubReg];
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let SubRegIndices = [sub_32];
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}
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// SPR - One of the 32-bit special-purpose registers
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class SPR<bits<10> num, string n> : PPCReg<n> {
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field bits<10> Num = num;
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}
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// FPR - One of the 32 64-bit floating-point registers
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class FPR<bits<5> num, string n> : PPCReg<n> {
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field bits<5> Num = num;
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}
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// VR - One of the 32 128-bit vector registers
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class VR<bits<5> num, string n> : PPCReg<n> {
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field bits<5> Num = num;
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}
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// CR - One of the 8 4-bit condition registers
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class CR<bits<3> num, string n, list<Register> subregs> : PPCReg<n> {
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field bits<3> Num = num;
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let SubRegs = subregs;
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}
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// CRBIT - One of the 32 1-bit condition register fields
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class CRBIT<bits<5> num, string n> : PPCReg<n> {
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field bits<5> Num = num;
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}
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// General-purpose registers
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def R0 : GPR< 0, "r0">, DwarfRegNum<[0]>;
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def R1 : GPR< 1, "r1">, DwarfRegNum<[1]>;
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def R2 : GPR< 2, "r2">, DwarfRegNum<[2]>;
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def R3 : GPR< 3, "r3">, DwarfRegNum<[3]>;
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def R4 : GPR< 4, "r4">, DwarfRegNum<[4]>;
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def R5 : GPR< 5, "r5">, DwarfRegNum<[5]>;
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def R6 : GPR< 6, "r6">, DwarfRegNum<[6]>;
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def R7 : GPR< 7, "r7">, DwarfRegNum<[7]>;
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def R8 : GPR< 8, "r8">, DwarfRegNum<[8]>;
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def R9 : GPR< 9, "r9">, DwarfRegNum<[9]>;
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def R10 : GPR<10, "r10">, DwarfRegNum<[10]>;
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def R11 : GPR<11, "r11">, DwarfRegNum<[11]>;
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def R12 : GPR<12, "r12">, DwarfRegNum<[12]>;
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def R13 : GPR<13, "r13">, DwarfRegNum<[13]>;
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def R14 : GPR<14, "r14">, DwarfRegNum<[14]>;
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def R15 : GPR<15, "r15">, DwarfRegNum<[15]>;
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def R16 : GPR<16, "r16">, DwarfRegNum<[16]>;
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def R17 : GPR<17, "r17">, DwarfRegNum<[17]>;
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def R18 : GPR<18, "r18">, DwarfRegNum<[18]>;
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def R19 : GPR<19, "r19">, DwarfRegNum<[19]>;
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def R20 : GPR<20, "r20">, DwarfRegNum<[20]>;
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def R21 : GPR<21, "r21">, DwarfRegNum<[21]>;
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def R22 : GPR<22, "r22">, DwarfRegNum<[22]>;
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def R23 : GPR<23, "r23">, DwarfRegNum<[23]>;
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def R24 : GPR<24, "r24">, DwarfRegNum<[24]>;
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def R25 : GPR<25, "r25">, DwarfRegNum<[25]>;
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def R26 : GPR<26, "r26">, DwarfRegNum<[26]>;
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def R27 : GPR<27, "r27">, DwarfRegNum<[27]>;
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def R28 : GPR<28, "r28">, DwarfRegNum<[28]>;
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def R29 : GPR<29, "r29">, DwarfRegNum<[29]>;
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def R30 : GPR<30, "r30">, DwarfRegNum<[30]>;
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def R31 : GPR<31, "r31">, DwarfRegNum<[31]>;
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// 64-bit General-purpose registers
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def X0 : GP8< R0, "r0">, DwarfRegNum<[0]>;
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def X1 : GP8< R1, "r1">, DwarfRegNum<[1]>;
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def X2 : GP8< R2, "r2">, DwarfRegNum<[2]>;
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def X3 : GP8< R3, "r3">, DwarfRegNum<[3]>;
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def X4 : GP8< R4, "r4">, DwarfRegNum<[4]>;
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def X5 : GP8< R5, "r5">, DwarfRegNum<[5]>;
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def X6 : GP8< R6, "r6">, DwarfRegNum<[6]>;
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def X7 : GP8< R7, "r7">, DwarfRegNum<[7]>;
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def X8 : GP8< R8, "r8">, DwarfRegNum<[8]>;
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def X9 : GP8< R9, "r9">, DwarfRegNum<[9]>;
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def X10 : GP8<R10, "r10">, DwarfRegNum<[10]>;
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def X11 : GP8<R11, "r11">, DwarfRegNum<[11]>;
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def X12 : GP8<R12, "r12">, DwarfRegNum<[12]>;
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def X13 : GP8<R13, "r13">, DwarfRegNum<[13]>;
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def X14 : GP8<R14, "r14">, DwarfRegNum<[14]>;
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def X15 : GP8<R15, "r15">, DwarfRegNum<[15]>;
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def X16 : GP8<R16, "r16">, DwarfRegNum<[16]>;
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def X17 : GP8<R17, "r17">, DwarfRegNum<[17]>;
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def X18 : GP8<R18, "r18">, DwarfRegNum<[18]>;
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def X19 : GP8<R19, "r19">, DwarfRegNum<[19]>;
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def X20 : GP8<R20, "r20">, DwarfRegNum<[20]>;
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def X21 : GP8<R21, "r21">, DwarfRegNum<[21]>;
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def X22 : GP8<R22, "r22">, DwarfRegNum<[22]>;
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def X23 : GP8<R23, "r23">, DwarfRegNum<[23]>;
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def X24 : GP8<R24, "r24">, DwarfRegNum<[24]>;
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def X25 : GP8<R25, "r25">, DwarfRegNum<[25]>;
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def X26 : GP8<R26, "r26">, DwarfRegNum<[26]>;
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def X27 : GP8<R27, "r27">, DwarfRegNum<[27]>;
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def X28 : GP8<R28, "r28">, DwarfRegNum<[28]>;
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def X29 : GP8<R29, "r29">, DwarfRegNum<[29]>;
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def X30 : GP8<R30, "r30">, DwarfRegNum<[30]>;
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def X31 : GP8<R31, "r31">, DwarfRegNum<[31]>;
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// Floating-point registers
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def F0 : FPR< 0, "f0">, DwarfRegNum<[32]>;
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def F1 : FPR< 1, "f1">, DwarfRegNum<[33]>;
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def F2 : FPR< 2, "f2">, DwarfRegNum<[34]>;
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def F3 : FPR< 3, "f3">, DwarfRegNum<[35]>;
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def F4 : FPR< 4, "f4">, DwarfRegNum<[36]>;
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def F5 : FPR< 5, "f5">, DwarfRegNum<[37]>;
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def F6 : FPR< 6, "f6">, DwarfRegNum<[38]>;
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def F7 : FPR< 7, "f7">, DwarfRegNum<[39]>;
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def F8 : FPR< 8, "f8">, DwarfRegNum<[40]>;
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def F9 : FPR< 9, "f9">, DwarfRegNum<[41]>;
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def F10 : FPR<10, "f10">, DwarfRegNum<[42]>;
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def F11 : FPR<11, "f11">, DwarfRegNum<[43]>;
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def F12 : FPR<12, "f12">, DwarfRegNum<[44]>;
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def F13 : FPR<13, "f13">, DwarfRegNum<[45]>;
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def F14 : FPR<14, "f14">, DwarfRegNum<[46]>;
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def F15 : FPR<15, "f15">, DwarfRegNum<[47]>;
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def F16 : FPR<16, "f16">, DwarfRegNum<[48]>;
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def F17 : FPR<17, "f17">, DwarfRegNum<[49]>;
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def F18 : FPR<18, "f18">, DwarfRegNum<[50]>;
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def F19 : FPR<19, "f19">, DwarfRegNum<[51]>;
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def F20 : FPR<20, "f20">, DwarfRegNum<[52]>;
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def F21 : FPR<21, "f21">, DwarfRegNum<[53]>;
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def F22 : FPR<22, "f22">, DwarfRegNum<[54]>;
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def F23 : FPR<23, "f23">, DwarfRegNum<[55]>;
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def F24 : FPR<24, "f24">, DwarfRegNum<[56]>;
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def F25 : FPR<25, "f25">, DwarfRegNum<[57]>;
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def F26 : FPR<26, "f26">, DwarfRegNum<[58]>;
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def F27 : FPR<27, "f27">, DwarfRegNum<[59]>;
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def F28 : FPR<28, "f28">, DwarfRegNum<[60]>;
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def F29 : FPR<29, "f29">, DwarfRegNum<[61]>;
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def F30 : FPR<30, "f30">, DwarfRegNum<[62]>;
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def F31 : FPR<31, "f31">, DwarfRegNum<[63]>;
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// Vector registers
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def V0 : VR< 0, "v0">, DwarfRegNum<[77]>;
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def V1 : VR< 1, "v1">, DwarfRegNum<[78]>;
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def V2 : VR< 2, "v2">, DwarfRegNum<[79]>;
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def V3 : VR< 3, "v3">, DwarfRegNum<[80]>;
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def V4 : VR< 4, "v4">, DwarfRegNum<[81]>;
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def V5 : VR< 5, "v5">, DwarfRegNum<[82]>;
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def V6 : VR< 6, "v6">, DwarfRegNum<[83]>;
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def V7 : VR< 7, "v7">, DwarfRegNum<[84]>;
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def V8 : VR< 8, "v8">, DwarfRegNum<[85]>;
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def V9 : VR< 9, "v9">, DwarfRegNum<[86]>;
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def V10 : VR<10, "v10">, DwarfRegNum<[87]>;
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def V11 : VR<11, "v11">, DwarfRegNum<[88]>;
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def V12 : VR<12, "v12">, DwarfRegNum<[89]>;
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def V13 : VR<13, "v13">, DwarfRegNum<[90]>;
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def V14 : VR<14, "v14">, DwarfRegNum<[91]>;
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def V15 : VR<15, "v15">, DwarfRegNum<[92]>;
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def V16 : VR<16, "v16">, DwarfRegNum<[93]>;
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def V17 : VR<17, "v17">, DwarfRegNum<[94]>;
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def V18 : VR<18, "v18">, DwarfRegNum<[95]>;
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def V19 : VR<19, "v19">, DwarfRegNum<[96]>;
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def V20 : VR<20, "v20">, DwarfRegNum<[97]>;
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def V21 : VR<21, "v21">, DwarfRegNum<[98]>;
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def V22 : VR<22, "v22">, DwarfRegNum<[99]>;
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def V23 : VR<23, "v23">, DwarfRegNum<[100]>;
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def V24 : VR<24, "v24">, DwarfRegNum<[101]>;
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def V25 : VR<25, "v25">, DwarfRegNum<[102]>;
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def V26 : VR<26, "v26">, DwarfRegNum<[103]>;
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def V27 : VR<27, "v27">, DwarfRegNum<[104]>;
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def V28 : VR<28, "v28">, DwarfRegNum<[105]>;
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def V29 : VR<29, "v29">, DwarfRegNum<[106]>;
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def V30 : VR<30, "v30">, DwarfRegNum<[107]>;
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def V31 : VR<31, "v31">, DwarfRegNum<[108]>;
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// Condition register bits
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def CR0LT : CRBIT< 0, "0">, DwarfRegNum<[0]>;
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def CR0GT : CRBIT< 1, "1">, DwarfRegNum<[0]>;
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def CR0EQ : CRBIT< 2, "2">, DwarfRegNum<[0]>;
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def CR0UN : CRBIT< 3, "3">, DwarfRegNum<[0]>;
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def CR1LT : CRBIT< 4, "4">, DwarfRegNum<[0]>;
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def CR1GT : CRBIT< 5, "5">, DwarfRegNum<[0]>;
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def CR1EQ : CRBIT< 6, "6">, DwarfRegNum<[0]>;
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def CR1UN : CRBIT< 7, "7">, DwarfRegNum<[0]>;
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def CR2LT : CRBIT< 8, "8">, DwarfRegNum<[0]>;
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def CR2GT : CRBIT< 9, "9">, DwarfRegNum<[0]>;
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def CR2EQ : CRBIT<10, "10">, DwarfRegNum<[0]>;
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def CR2UN : CRBIT<11, "11">, DwarfRegNum<[0]>;
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def CR3LT : CRBIT<12, "12">, DwarfRegNum<[0]>;
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def CR3GT : CRBIT<13, "13">, DwarfRegNum<[0]>;
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def CR3EQ : CRBIT<14, "14">, DwarfRegNum<[0]>;
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def CR3UN : CRBIT<15, "15">, DwarfRegNum<[0]>;
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def CR4LT : CRBIT<16, "16">, DwarfRegNum<[0]>;
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def CR4GT : CRBIT<17, "17">, DwarfRegNum<[0]>;
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def CR4EQ : CRBIT<18, "18">, DwarfRegNum<[0]>;
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def CR4UN : CRBIT<19, "19">, DwarfRegNum<[0]>;
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def CR5LT : CRBIT<20, "20">, DwarfRegNum<[0]>;
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def CR5GT : CRBIT<21, "21">, DwarfRegNum<[0]>;
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def CR5EQ : CRBIT<22, "22">, DwarfRegNum<[0]>;
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def CR5UN : CRBIT<23, "23">, DwarfRegNum<[0]>;
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def CR6LT : CRBIT<24, "24">, DwarfRegNum<[0]>;
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def CR6GT : CRBIT<25, "25">, DwarfRegNum<[0]>;
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def CR6EQ : CRBIT<26, "26">, DwarfRegNum<[0]>;
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def CR6UN : CRBIT<27, "27">, DwarfRegNum<[0]>;
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def CR7LT : CRBIT<28, "28">, DwarfRegNum<[0]>;
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def CR7GT : CRBIT<29, "29">, DwarfRegNum<[0]>;
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def CR7EQ : CRBIT<30, "30">, DwarfRegNum<[0]>;
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def CR7UN : CRBIT<31, "31">, DwarfRegNum<[0]>;
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// Condition registers
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let SubRegIndices = [sub_lt, sub_gt, sub_eq, sub_un] in {
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def CR0 : CR<0, "cr0", [CR0LT, CR0GT, CR0EQ, CR0UN]>, DwarfRegNum<[68]>;
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def CR1 : CR<1, "cr1", [CR1LT, CR1GT, CR1EQ, CR1UN]>, DwarfRegNum<[69]>;
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def CR2 : CR<2, "cr2", [CR2LT, CR2GT, CR2EQ, CR2UN]>, DwarfRegNum<[70]>;
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def CR3 : CR<3, "cr3", [CR3LT, CR3GT, CR3EQ, CR3UN]>, DwarfRegNum<[71]>;
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def CR4 : CR<4, "cr4", [CR4LT, CR4GT, CR4EQ, CR4UN]>, DwarfRegNum<[72]>;
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def CR5 : CR<5, "cr5", [CR5LT, CR5GT, CR5EQ, CR5UN]>, DwarfRegNum<[73]>;
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def CR6 : CR<6, "cr6", [CR6LT, CR6GT, CR6EQ, CR6UN]>, DwarfRegNum<[74]>;
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def CR7 : CR<7, "cr7", [CR7LT, CR7GT, CR7EQ, CR7UN]>, DwarfRegNum<[75]>;
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}
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// Link register
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def LR : SPR<8, "lr">, DwarfRegNum<[65]>;
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//let Aliases = [LR] in
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def LR8 : SPR<8, "lr">, DwarfRegNum<[65]>;
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// Count register
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def CTR : SPR<9, "ctr">, DwarfRegNum<[66]>;
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def CTR8 : SPR<9, "ctr">, DwarfRegNum<[66]>;
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// VRsave register
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def VRSAVE: SPR<256, "VRsave">, DwarfRegNum<[107]>;
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// Carry bit. In the architecture this is really bit 0 of the XER register
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// (which really is SPR register 1); this is the only bit interesting to a
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// compiler.
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def CARRY: SPR<1, "ca">, DwarfRegNum<[0]>;
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// FP rounding mode: bits 30 and 31 of the FP status and control register
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// This is not allocated as a normal register; it appears only in
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// Uses and Defs. The ABI says it needs to be preserved by a function,
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// but this is not achieved by saving and restoring it as with
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// most registers, it has to be done in code; to make this work all the
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// return and call instructions are described as Uses of RM, so instructions
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// that do nothing but change RM will not get deleted.
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// Also, in the architecture it is not really a SPR; 512 is arbitrary.
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def RM: SPR<512, "**ROUNDING MODE**">, DwarfRegNum<[0]>;
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/// Register classes
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// Allocate volatiles first
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// then nonvolatiles in reverse order since stmw/lmw save from rN to r31
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def GPRC : RegisterClass<"PPC", [i32], 32,
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[R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12,
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R30, R29, R28, R27, R26, R25, R24, R23, R22, R21, R20, R19, R18, R17,
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R16, R15, R14, R13, R31, R0, R1, LR]>
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{
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let MethodProtos = [{
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iterator allocation_order_begin(const MachineFunction &MF) const;
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iterator allocation_order_end(const MachineFunction &MF) const;
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}];
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let MethodBodies = [{
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GPRCClass::iterator
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GPRCClass::allocation_order_begin(const MachineFunction &MF) const {
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// 32-bit SVR4 ABI: r2 is reserved for the OS.
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// 64-bit SVR4 ABI: r2 is reserved for the TOC pointer.
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// Darwin: R2 is reserved for CR save/restore sequence.
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return begin()+1;
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}
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GPRCClass::iterator
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GPRCClass::allocation_order_end(const MachineFunction &MF) const {
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// On PPC64, r13 is the thread pointer. Never allocate this register.
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// Note that this is overconservative, as it also prevents allocation of
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// R31 when the FP is not needed.
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// When using the 32-bit SVR4 ABI, r13 is reserved for the Small Data Area
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// pointer.
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const PPCSubtarget &Subtarget = MF.getTarget().getSubtarget<PPCSubtarget>();
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const PPCFrameLowering *PPCFI =
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static_cast<const PPCFrameLowering*>(MF.getTarget().getFrameLowering());
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if (Subtarget.isPPC64() || Subtarget.isSVR4ABI())
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return end()-5; // don't allocate R13, R31, R0, R1, LR
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if (PPCFI->needsFP(MF))
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return end()-4; // don't allocate R31, R0, R1, LR
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else
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return end()-3; // don't allocate R0, R1, LR
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}
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}];
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}
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def G8RC : RegisterClass<"PPC", [i64], 64,
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[X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12,
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X30, X29, X28, X27, X26, X25, X24, X23, X22, X21, X20, X19, X18, X17,
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X16, X15, X14, X31, X13, X0, X1, LR8]>
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{
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let MethodProtos = [{
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iterator allocation_order_begin(const MachineFunction &MF) const;
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iterator allocation_order_end(const MachineFunction &MF) const;
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}];
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let MethodBodies = [{
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G8RCClass::iterator
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G8RCClass::allocation_order_begin(const MachineFunction &MF) const {
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// 64-bit SVR4 ABI: r2 is reserved for the TOC pointer.
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// Darwin: r2 is reserved for CR save/restore sequence.
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return begin()+1;
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}
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G8RCClass::iterator
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G8RCClass::allocation_order_end(const MachineFunction &MF) const {
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const PPCFrameLowering *PPCFI =
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static_cast<const PPCFrameLowering*>(MF.getTarget().getFrameLowering());
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if (PPCFI->needsFP(MF))
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return end()-5;
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else
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return end()-4;
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}
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|
}];
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|
}
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|
|
|
// Allocate volatiles first, then non-volatiles in reverse order. With the SVR4
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|
// ABI the size of the Floating-point register save area is determined by the
|
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// allocated non-volatile register with the lowest register number, as FP
|
|
// register N is spilled to offset 8 * (32 - N) below the back chain word of the
|
|
// previous stack frame. By allocating non-volatiles in reverse order we make
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|
// sure that the Floating-point register save area is always as small as
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|
// possible because there aren't any unused spill slots.
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|
def F8RC : RegisterClass<"PPC", [f64], 64, [F0, F1, F2, F3, F4, F5, F6, F7,
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F8, F9, F10, F11, F12, F13, F31, F30, F29, F28, F27, F26, F25, F24, F23,
|
|
F22, F21, F20, F19, F18, F17, F16, F15, F14]>;
|
|
def F4RC : RegisterClass<"PPC", [f32], 32, [F0, F1, F2, F3, F4, F5, F6, F7,
|
|
F8, F9, F10, F11, F12, F13, F31, F30, F29, F28, F27, F26, F25, F24, F23,
|
|
F22, F21, F20, F19, F18, F17, F16, F15, F14]>;
|
|
|
|
def VRRC : RegisterClass<"PPC", [v16i8,v8i16,v4i32,v4f32], 128,
|
|
[V2, V3, V4, V5, V0, V1,
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|
V6, V7, V8, V9, V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V31, V30,
|
|
V29, V28, V27, V26, V25, V24, V23, V22, V21, V20]>;
|
|
|
|
def CRBITRC : RegisterClass<"PPC", [i32], 32,
|
|
[CR0LT, CR0GT, CR0EQ, CR0UN,
|
|
CR1LT, CR1GT, CR1EQ, CR1UN,
|
|
CR2LT, CR2GT, CR2EQ, CR2UN,
|
|
CR3LT, CR3GT, CR3EQ, CR3UN,
|
|
CR4LT, CR4GT, CR4EQ, CR4UN,
|
|
CR5LT, CR5GT, CR5EQ, CR5UN,
|
|
CR6LT, CR6GT, CR6EQ, CR6UN,
|
|
CR7LT, CR7GT, CR7EQ, CR7UN
|
|
]>
|
|
{
|
|
let CopyCost = -1;
|
|
}
|
|
|
|
def CRRC : RegisterClass<"PPC", [i32], 32, [CR0, CR1, CR5, CR6, CR7, CR2,
|
|
CR3, CR4]>
|
|
{
|
|
let SubRegClasses = [(CRBITRC sub_lt, sub_gt, sub_eq, sub_un)];
|
|
}
|
|
|
|
def CTRRC : RegisterClass<"PPC", [i32], 32, [CTR]>;
|
|
def CTRRC8 : RegisterClass<"PPC", [i64], 64, [CTR8]>;
|
|
def VRSAVERC : RegisterClass<"PPC", [i32], 32, [VRSAVE]>;
|
|
def CARRYRC : RegisterClass<"PPC", [i32], 32, [CARRY]> {
|
|
let CopyCost = -1;
|
|
}
|