1//===- PPCGenRegisterBankInfo.def -------------------------------*- C++ -*-==// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8/// \file 9/// This file defines all the static objects used by PPCRegisterBankInfo. 10/// \todo This should be generated by TableGen, because the logic here can be 11/// derived from register bank definition. Not yet implemented. 12//===----------------------------------------------------------------------===// 13 14namespace llvm { 15RegisterBankInfo::PartialMapping PPCGenRegisterBankInfo::PartMappings[]{ 16 /* StartIdx, Length, RegBank */ 17 // 0: GPR 32-bit value. 18 {0, 32, PPC::GPRRegBank}, 19 // 1: GPR 64-bit value. 20 {0, 64, PPC::GPRRegBank}, 21 // 2: FPR 32-bit value 22 {0, 32, PPC::FPRRegBank}, 23 // 3: FPR 64-bit value 24 {0, 64, PPC::FPRRegBank}, 25 // 4: CR 4-bit value 26 {0, 4, PPC::CRRegBank}, 27}; 28 29// ValueMappings. 30// Pointers to the entries in this array are returned by getValueMapping() and 31// getCopyMapping(). 32// 33// The array has the following structure: 34// - At index 0 is the invalid entry. 35// - After that, the mappings for the register types from PartialMappingIdx 36// follow. Each mapping consists of 3 entries, which is needed to cover 37// 3-operands instructions. 38// - Last, mappings for cross-register bank moves follow. Since COPY has only 39// 2 operands, a mapping consists of 2 entries. 40RegisterBankInfo::ValueMapping PPCGenRegisterBankInfo::ValMappings[]{ 41 /* BreakDown, NumBreakDowns */ 42 // 0: invalid 43 {nullptr, 0}, 44 // 1: GPR 32-bit value. 45 {&PPCGenRegisterBankInfo::PartMappings[PMI_GPR32 - PMI_Min], 1}, 46 {&PPCGenRegisterBankInfo::PartMappings[PMI_GPR32 - PMI_Min], 1}, 47 {&PPCGenRegisterBankInfo::PartMappings[PMI_GPR32 - PMI_Min], 1}, 48 // 4: GPR 64-bit value. 49 {&PPCGenRegisterBankInfo::PartMappings[PMI_GPR64 - PMI_Min], 1}, 50 {&PPCGenRegisterBankInfo::PartMappings[PMI_GPR64 - PMI_Min], 1}, 51 {&PPCGenRegisterBankInfo::PartMappings[PMI_GPR64 - PMI_Min], 1}, 52 // 7: FPR 32-bit value. 53 {&PPCGenRegisterBankInfo::PartMappings[PMI_FPR32 - PMI_Min], 1}, 54 {&PPCGenRegisterBankInfo::PartMappings[PMI_FPR32 - PMI_Min], 1}, 55 {&PPCGenRegisterBankInfo::PartMappings[PMI_FPR32 - PMI_Min], 1}, 56 // 10: FPR 64-bit value. 57 {&PPCGenRegisterBankInfo::PartMappings[PMI_FPR64 - PMI_Min], 1}, 58 {&PPCGenRegisterBankInfo::PartMappings[PMI_FPR64 - PMI_Min], 1}, 59 {&PPCGenRegisterBankInfo::PartMappings[PMI_FPR64 - PMI_Min], 1}, 60 // 13: CR 4-bit value. 61 {&PPCGenRegisterBankInfo::PartMappings[PMI_CR - PMI_Min], 1}, 62}; 63 64// TODO Too simple! 65const RegisterBankInfo::ValueMapping * 66PPCGenRegisterBankInfo::getValueMapping(PartialMappingIdx RBIdx) { 67 assert(RBIdx != PartialMappingIdx::PMI_None && "No mapping needed for that"); 68 69 unsigned ValMappingIdx = RBIdx - PMI_Min; 70 71 return &ValMappings[1 + 3 * ValMappingIdx]; 72} 73 74// TODO Too simple! 75const RegisterBankInfo::ValueMapping * 76PPCGenRegisterBankInfo::getCopyMapping(unsigned DstBankID, unsigned SrcBankID, 77 unsigned Size) { 78 assert(DstBankID < PPC::NumRegisterBanks && "Invalid bank ID"); 79 assert(SrcBankID < PPC::NumRegisterBanks && "Invalid bank ID"); 80 81 return &ValMappings[1]; 82} 83 84} // namespace llvm 85