1 //===-- LanaiAluCode.h - ALU operator encoding ----------------------------===// 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 // 9 // The encoding for ALU operators used in RM and RRM operands 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_LIB_TARGET_LANAI_LANAIALUCODE_H 14 #define LLVM_LIB_TARGET_LANAI_LANAIALUCODE_H 15 16 #include "llvm/ADT/StringSwitch.h" 17 #include "llvm/CodeGen/ISDOpcodes.h" 18 #include "llvm/Support/ErrorHandling.h" 19 20 namespace llvm { 21 namespace LPAC { 22 enum AluCode { 23 ADD = 0x00, 24 ADDC = 0x01, 25 SUB = 0x02, 26 SUBB = 0x03, 27 AND = 0x04, 28 OR = 0x05, 29 XOR = 0x06, 30 SPECIAL = 0x07, 31 32 // Shift instructions are treated as SPECIAL when encoding the machine 33 // instruction, but kept distinct until lowering. The constant values are 34 // chosen to ease lowering. 35 SHL = 0x17, 36 SRL = 0x27, 37 SRA = 0x37, 38 39 // Indicates an unknown/unsupported operator 40 UNKNOWN = 0xFF, 41 }; 42 43 // Bits indicating post- and pre-operators should be tested and set using Is* 44 // and Make* utility functions 45 const int Lanai_PRE_OP = 0x40; 46 const int Lanai_POST_OP = 0x80; 47 48 inline static unsigned encodeLanaiAluCode(unsigned AluOp) { 49 unsigned const OP_ENCODING_MASK = 0x07; 50 return AluOp & OP_ENCODING_MASK; 51 } 52 53 inline static unsigned getAluOp(unsigned AluOp) { 54 unsigned const ALU_MASK = 0x3F; 55 return AluOp & ALU_MASK; 56 } 57 58 inline static bool isPreOp(unsigned AluOp) { return AluOp & Lanai_PRE_OP; } 59 60 inline static bool isPostOp(unsigned AluOp) { return AluOp & Lanai_POST_OP; } 61 62 inline static unsigned makePreOp(unsigned AluOp) { 63 assert(!isPostOp(AluOp) && "Operator can't be a post- and pre-op"); 64 return AluOp | Lanai_PRE_OP; 65 } 66 67 inline static unsigned makePostOp(unsigned AluOp) { 68 assert(!isPreOp(AluOp) && "Operator can't be a post- and pre-op"); 69 return AluOp | Lanai_POST_OP; 70 } 71 72 inline static bool modifiesOp(unsigned AluOp) { 73 return isPreOp(AluOp) || isPostOp(AluOp); 74 } 75 76 inline static const char *lanaiAluCodeToString(unsigned AluOp) { 77 switch (getAluOp(AluOp)) { 78 case ADD: 79 return "add"; 80 case ADDC: 81 return "addc"; 82 case SUB: 83 return "sub"; 84 case SUBB: 85 return "subb"; 86 case AND: 87 return "and"; 88 case OR: 89 return "or"; 90 case XOR: 91 return "xor"; 92 case SHL: 93 return "sh"; 94 case SRL: 95 return "sh"; 96 case SRA: 97 return "sha"; 98 default: 99 llvm_unreachable("Invalid ALU code."); 100 } 101 } 102 103 inline static AluCode stringToLanaiAluCode(StringRef S) { 104 return StringSwitch<AluCode>(S) 105 .Case("add", ADD) 106 .Case("addc", ADDC) 107 .Case("sub", SUB) 108 .Case("subb", SUBB) 109 .Case("and", AND) 110 .Case("or", OR) 111 .Case("xor", XOR) 112 .Case("sh", SHL) 113 .Case("srl", SRL) 114 .Case("sha", SRA) 115 .Default(UNKNOWN); 116 } 117 118 inline static AluCode isdToLanaiAluCode(ISD::NodeType Node_type) { 119 switch (Node_type) { 120 case ISD::ADD: 121 return AluCode::ADD; 122 case ISD::ADDE: 123 return AluCode::ADDC; 124 case ISD::SUB: 125 return AluCode::SUB; 126 case ISD::SUBE: 127 return AluCode::SUBB; 128 case ISD::AND: 129 return AluCode::AND; 130 case ISD::OR: 131 return AluCode::OR; 132 case ISD::XOR: 133 return AluCode::XOR; 134 case ISD::SHL: 135 return AluCode::SHL; 136 case ISD::SRL: 137 return AluCode::SRL; 138 case ISD::SRA: 139 return AluCode::SRA; 140 default: 141 return AluCode::UNKNOWN; 142 } 143 } 144 } // namespace LPAC 145 } // namespace llvm 146 147 #endif // LLVM_LIB_TARGET_LANAI_LANAIALUCODE_H 148