| //===- SparcV8InstrFormats.td - SparcV8 Instr Formats ------*- tablegen -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // Format #2 instruction classes in the SparcV8 |
| //===----------------------------------------------------------------------===// |
| |
| class F2 : InstV8 { // Format 2 instructions |
| bits<3> op2; |
| bits<22> imm22; |
| let op = 0; // op = 0 |
| let Inst{24-22} = op2; |
| let Inst{21-0} = imm22; |
| } |
| |
| // Specific F2 classes: SparcV8 manual, page 44 |
| // |
| class F2_1<bits<3> op2Val, string name> : F2 { |
| bits<5> rd; |
| |
| let op2 = op2Val; |
| let Name = name; |
| |
| let Inst{29-25} = rd; |
| } |
| |
| class F2_2<bits<4> condVal, bits<3> op2Val, string name> : F2 { |
| bits<4> cond; |
| bit annul = 0; // currently unused |
| |
| let cond = condVal; |
| let op2 = op2Val; |
| let Name = name; |
| |
| let Inst{29} = annul; |
| let Inst{28-25} = cond; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Format #3 instruction classes in the SparcV8 |
| //===----------------------------------------------------------------------===// |
| |
| class F3 : InstV8 { |
| bits<5> rd; |
| bits<6> op3; |
| bits<5> rs1; |
| let op{1} = 1; // Op = 2 or 3 |
| let Inst{29-25} = rd; |
| let Inst{24-19} = op3; |
| let Inst{18-14} = rs1; |
| } |
| |
| // Specific F3 classes: SparcV8 manual, page 44 |
| // |
| class F3_1<bits<2> opVal, bits<6> op3val, string name> : F3 { |
| bits<8> asi = 0; // asi not currently used in SparcV8 |
| bits<5> rs2; |
| |
| let op = opVal; |
| let op3 = op3val; |
| let Name = name; |
| |
| let Inst{13} = 0; // i field = 0 |
| let Inst{12-5} = asi; // address space identifier |
| let Inst{4-0} = rs2; |
| } |
| |
| class F3_2<bits<2> opVal, bits<6> op3val, string name> : F3 { |
| bits<13> simm13; |
| |
| let op = opVal; |
| let op3 = op3val; |
| let Name = name; |
| |
| let Inst{13} = 1; // i field = 1 |
| let Inst{12-0} = simm13; |
| } |
| |
| // floating-point |
| class F3_3<bits<2> opVal, bits<6> op3val, bits<9> opfval, string name> : F3 { |
| bits<5> rs2; |
| |
| let op = opVal; |
| let op3 = op3val; |
| let Name = name; |
| |
| let Inst{13-5} = opfval; // fp opcode |
| let Inst{4-0} = rs2; |
| } |