1 //===-- RISCVBaseInfo.h - Top level definitions for RISCV MC ----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains small standalone enum definitions for the RISCV target 11 // useful for the compiler back-end and the MC libraries. 12 // 13 //===----------------------------------------------------------------------===// 14 #ifndef LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVBASEINFO_H 15 #define LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVBASEINFO_H 16 17 #include "RISCVMCTargetDesc.h" 18 #include "llvm/ADT/StringRef.h" 19 #include "llvm/ADT/StringSwitch.h" 20 21 namespace llvm { 22 23 // RISCVII - This namespace holds all of the target specific flags that 24 // instruction info tracks. All definitions must match RISCVInstrFormats.td. 25 namespace RISCVII { 26 enum { 27 InstFormatPseudo = 0, 28 InstFormatR = 1, 29 InstFormatR4 = 2, 30 InstFormatI = 3, 31 InstFormatS = 4, 32 InstFormatB = 5, 33 InstFormatU = 6, 34 InstFormatJ = 7, 35 InstFormatCR = 8, 36 InstFormatCI = 9, 37 InstFormatCSS = 10, 38 InstFormatCIW = 11, 39 InstFormatCL = 12, 40 InstFormatCS = 13, 41 InstFormatCB = 14, 42 InstFormatCJ = 15, 43 InstFormatOther = 16, 44 45 InstFormatMask = 31 46 }; 47 48 enum { 49 MO_None, 50 MO_LO, 51 MO_HI, 52 MO_PCREL_HI, 53 }; 54 } // namespace RISCVII 55 56 // Describes the predecessor/successor bits used in the FENCE instruction. 57 namespace RISCVFenceField { 58 enum FenceField { 59 I = 8, 60 O = 4, 61 R = 2, 62 W = 1 63 }; 64 } 65 66 // Describes the supported floating point rounding mode encodings. 67 namespace RISCVFPRndMode { 68 enum RoundingMode { 69 RNE = 0, 70 RTZ = 1, 71 RDN = 2, 72 RUP = 3, 73 RMM = 4, 74 DYN = 7, 75 Invalid 76 }; 77 78 inline static StringRef roundingModeToString(RoundingMode RndMode) { 79 switch (RndMode) { 80 default: 81 llvm_unreachable("Unknown floating point rounding mode"); 82 case RISCVFPRndMode::RNE: 83 return "rne"; 84 case RISCVFPRndMode::RTZ: 85 return "rtz"; 86 case RISCVFPRndMode::RDN: 87 return "rdn"; 88 case RISCVFPRndMode::RUP: 89 return "rup"; 90 case RISCVFPRndMode::RMM: 91 return "rmm"; 92 case RISCVFPRndMode::DYN: 93 return "dyn"; 94 } 95 } 96 97 inline static RoundingMode stringToRoundingMode(StringRef Str) { 98 return StringSwitch<RoundingMode>(Str) 99 .Case("rne", RISCVFPRndMode::RNE) 100 .Case("rtz", RISCVFPRndMode::RTZ) 101 .Case("rdn", RISCVFPRndMode::RDN) 102 .Case("rup", RISCVFPRndMode::RUP) 103 .Case("rmm", RISCVFPRndMode::RMM) 104 .Case("dyn", RISCVFPRndMode::DYN) 105 .Default(RISCVFPRndMode::Invalid); 106 } 107 } // namespace RISCVFPRndMode 108 } // namespace llvm 109 110 #endif 111
