1 //===-- PPCMCTargetDesc.h - PowerPC Target Descriptions ---------*- 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 //
9 // This file provides PowerPC specific target descriptions.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCTARGETDESC_H
14 #define LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCTARGETDESC_H
15 
16 // GCC #defines PPC on Linux but we use it as our namespace name
17 #undef PPC
18 
19 #include "llvm/MC/MCRegisterInfo.h"
20 #include "llvm/Support/MathExtras.h"
21 #include <cstdint>
22 #include <memory>
23 
24 namespace llvm {
25 
26 class MCAsmBackend;
27 class MCCodeEmitter;
28 class MCContext;
29 class MCInstrInfo;
30 class MCObjectTargetWriter;
31 class MCRegisterInfo;
32 class MCSubtargetInfo;
33 class MCTargetOptions;
34 class Target;
35 
36 MCCodeEmitter *createPPCMCCodeEmitter(const MCInstrInfo &MCII,
37                                       MCContext &Ctx);
38 
39 MCAsmBackend *createPPCAsmBackend(const Target &T, const MCSubtargetInfo &STI,
40                                   const MCRegisterInfo &MRI,
41                                   const MCTargetOptions &Options);
42 
43 /// Construct an PPC ELF object writer.
44 std::unique_ptr<MCObjectTargetWriter> createPPCELFObjectWriter(bool Is64Bit,
45                                                                uint8_t OSABI);
46 /// Construct a PPC Mach-O object writer.
47 std::unique_ptr<MCObjectTargetWriter>
48 createPPCMachObjectWriter(bool Is64Bit, uint32_t CPUType, uint32_t CPUSubtype);
49 
50 /// Construct a PPC XCOFF object writer.
51 std::unique_ptr<MCObjectTargetWriter> createPPCXCOFFObjectWriter(bool Is64Bit);
52 
53 /// Returns true iff Val consists of one contiguous run of 1s with any number of
54 /// 0s on either side.  The 1s are allowed to wrap from LSB to MSB, so
55 /// 0x000FFF0, 0x0000FFFF, and 0xFF0000FF are all runs.  0x0F0F0000 is not,
56 /// since all 1s are not contiguous.
57 static inline bool isRunOfOnes(unsigned Val, unsigned &MB, unsigned &ME) {
58   if (!Val)
59     return false;
60 
61   if (isShiftedMask_32(Val)) {
62     // look for the first non-zero bit
63     MB = countLeadingZeros(Val);
64     // look for the first zero bit after the run of ones
65     ME = countLeadingZeros((Val - 1) ^ Val);
66     return true;
67   } else {
68     Val = ~Val; // invert mask
69     if (isShiftedMask_32(Val)) {
70       // effectively look for the first zero bit
71       ME = countLeadingZeros(Val) - 1;
72       // effectively look for the first one bit after the run of zeros
73       MB = countLeadingZeros((Val - 1) ^ Val) + 1;
74       return true;
75     }
76   }
77   // no run present
78   return false;
79 }
80 
81 static inline bool isRunOfOnes64(uint64_t Val, unsigned &MB, unsigned &ME) {
82   if (!Val)
83     return false;
84 
85   if (isShiftedMask_64(Val)) {
86     // look for the first non-zero bit
87     MB = countLeadingZeros(Val);
88     // look for the first zero bit after the run of ones
89     ME = countLeadingZeros((Val - 1) ^ Val);
90     return true;
91   } else {
92     Val = ~Val; // invert mask
93     if (isShiftedMask_64(Val)) {
94       // effectively look for the first zero bit
95       ME = countLeadingZeros(Val) - 1;
96       // effectively look for the first one bit after the run of zeros
97       MB = countLeadingZeros((Val - 1) ^ Val) + 1;
98       return true;
99     }
100   }
101   // no run present
102   return false;
103 }
104 
105 } // end namespace llvm
106 
107 // Generated files will use "namespace PPC". To avoid symbol clash,
108 // undefine PPC here. PPC may be predefined on some hosts.
109 #undef PPC
110 
111 // Defines symbolic names for PowerPC registers.  This defines a mapping from
112 // register name to register number.
113 //
114 #define GET_REGINFO_ENUM
115 #include "PPCGenRegisterInfo.inc"
116 
117 // Defines symbolic names for the PowerPC instructions.
118 //
119 #define GET_INSTRINFO_ENUM
120 #define GET_INSTRINFO_SCHED_ENUM
121 #define GET_INSTRINFO_MC_HELPER_DECLS
122 #include "PPCGenInstrInfo.inc"
123 
124 #define GET_SUBTARGETINFO_ENUM
125 #include "PPCGenSubtargetInfo.inc"
126 
127 #define PPC_REGS0_7(X)                                                         \
128   {                                                                            \
129     X##0, X##1, X##2, X##3, X##4, X##5, X##6, X##7                             \
130   }
131 
132 #define PPC_REGS0_31(X)                                                        \
133   {                                                                            \
134     X##0, X##1, X##2, X##3, X##4, X##5, X##6, X##7, X##8, X##9, X##10, X##11,  \
135         X##12, X##13, X##14, X##15, X##16, X##17, X##18, X##19, X##20, X##21,  \
136         X##22, X##23, X##24, X##25, X##26, X##27, X##28, X##29, X##30, X##31   \
137   }
138 
139 #define PPC_REGS_NO0_31(Z, X)                                                  \
140   {                                                                            \
141     Z, X##1, X##2, X##3, X##4, X##5, X##6, X##7, X##8, X##9, X##10, X##11,     \
142         X##12, X##13, X##14, X##15, X##16, X##17, X##18, X##19, X##20, X##21,  \
143         X##22, X##23, X##24, X##25, X##26, X##27, X##28, X##29, X##30, X##31   \
144   }
145 
146 #define PPC_REGS_LO_HI(LO, HI)                                                 \
147   {                                                                            \
148     LO##0, LO##1, LO##2, LO##3, LO##4, LO##5, LO##6, LO##7, LO##8, LO##9,      \
149         LO##10, LO##11, LO##12, LO##13, LO##14, LO##15, LO##16, LO##17,        \
150         LO##18, LO##19, LO##20, LO##21, LO##22, LO##23, LO##24, LO##25,        \
151         LO##26, LO##27, LO##28, LO##29, LO##30, LO##31, HI##0, HI##1, HI##2,   \
152         HI##3, HI##4, HI##5, HI##6, HI##7, HI##8, HI##9, HI##10, HI##11,       \
153         HI##12, HI##13, HI##14, HI##15, HI##16, HI##17, HI##18, HI##19,        \
154         HI##20, HI##21, HI##22, HI##23, HI##24, HI##25, HI##26, HI##27,        \
155         HI##28, HI##29, HI##30, HI##31                                         \
156   }
157 
158 using llvm::MCPhysReg;
159 
160 #define DEFINE_PPC_REGCLASSES \
161   static const MCPhysReg RRegs[32] = PPC_REGS0_31(PPC::R); \
162   static const MCPhysReg XRegs[32] = PPC_REGS0_31(PPC::X); \
163   static const MCPhysReg FRegs[32] = PPC_REGS0_31(PPC::F); \
164   static const MCPhysReg VSRpRegs[32] = PPC_REGS0_31(PPC::VSRp); \
165   static const MCPhysReg SPERegs[32] = PPC_REGS0_31(PPC::S); \
166   static const MCPhysReg VFRegs[32] = PPC_REGS0_31(PPC::VF); \
167   static const MCPhysReg VRegs[32] = PPC_REGS0_31(PPC::V); \
168   static const MCPhysReg RRegsNoR0[32] = \
169     PPC_REGS_NO0_31(PPC::ZERO, PPC::R); \
170   static const MCPhysReg XRegsNoX0[32] = \
171     PPC_REGS_NO0_31(PPC::ZERO8, PPC::X); \
172   static const MCPhysReg VSRegs[64] = \
173     PPC_REGS_LO_HI(PPC::VSL, PPC::V); \
174   static const MCPhysReg VSFRegs[64] = \
175     PPC_REGS_LO_HI(PPC::F, PPC::VF); \
176   static const MCPhysReg VSSRegs[64] = \
177     PPC_REGS_LO_HI(PPC::F, PPC::VF); \
178   static const MCPhysReg CRBITRegs[32] = { \
179     PPC::CR0LT, PPC::CR0GT, PPC::CR0EQ, PPC::CR0UN, \
180     PPC::CR1LT, PPC::CR1GT, PPC::CR1EQ, PPC::CR1UN, \
181     PPC::CR2LT, PPC::CR2GT, PPC::CR2EQ, PPC::CR2UN, \
182     PPC::CR3LT, PPC::CR3GT, PPC::CR3EQ, PPC::CR3UN, \
183     PPC::CR4LT, PPC::CR4GT, PPC::CR4EQ, PPC::CR4UN, \
184     PPC::CR5LT, PPC::CR5GT, PPC::CR5EQ, PPC::CR5UN, \
185     PPC::CR6LT, PPC::CR6GT, PPC::CR6EQ, PPC::CR6UN, \
186     PPC::CR7LT, PPC::CR7GT, PPC::CR7EQ, PPC::CR7UN}; \
187   static const MCPhysReg CRRegs[8] = PPC_REGS0_7(PPC::CR); \
188   static const MCPhysReg ACCRegs[8] = PPC_REGS0_7(PPC::ACC)
189 #endif // LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCTARGETDESC_H
190