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MicroMipsInstrFormats.td 5.05 KiB
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Akira Hatanaka's avatar
[mips] First patch which adds support for micromips.
Akira Hatanaka committed
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class MMArch {
  string Arch = "micromips";
  list<dag> Pattern = [];
}

class ADD_FM_MM<bits<6> op, bits<10> funct> : MMArch {
  bits<5> rt;
  bits<5> rs;
  bits<5> rd;

  bits<32> Inst;

  let Inst{31-26} = op;
  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
  let Inst{15-11} = rd;
  let Inst{10}    = 0;
  let Inst{9-0}   = funct;
}

class ADDI_FM_MM<bits<6> op> : MMArch {
  bits<5>  rs;
  bits<5>  rt;
  bits<16> imm16;

  bits<32> Inst;

  let Inst{31-26} = op;
  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
  let Inst{15-0}  = imm16;
}

class SLTI_FM_MM<bits<6> op> : MMArch {
  bits<5> rt;
  bits<5> rs;
  bits<16> imm16;

  bits<32> Inst;

  let Inst{31-26} = op;
Zoran Jovanovic's avatar
Use instr mapping for microMIPS in llvm-mc.  
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  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
Akira Hatanaka's avatar
[mips] First patch which adds support for micromips.
Akira Hatanaka committed
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  let Inst{15-0}  = imm16;
}

class LUI_FM_MM : MMArch {
  bits<5> rt;
  bits<16> imm16;

  bits<32> Inst;

  let Inst{31-26} = 0x10;
  let Inst{25-21} = 0xd;
  let Inst{20-16} = rt;
  let Inst{15-0}  = imm16;
}

class MULT_FM_MM<bits<10> funct> : MMArch {
  bits<5>  rs;
  bits<5>  rt;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
  let Inst{15-6}  = funct;
  let Inst{5-0}   = 0x3c;
}
Akira Hatanaka's avatar
[mips] Add definitions of micromips shift instructions.  
Akira Hatanaka committed
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class SRA_FM_MM<bits<10> funct, bit rotate> : MMArch {
  bits<5> rd;
  bits<5> rt;
  bits<5> shamt;

  bits<32> Inst;

  let Inst{31-26} = 0;
  let Inst{25-21} = rd;
  let Inst{20-16} = rt;
  let Inst{15-11} = shamt;
  let Inst{10}    = rotate;
  let Inst{9-0}   = funct;
}

class SRLV_FM_MM<bits<10> funct, bit rotate> : MMArch {
  bits<5> rd;
  bits<5> rt;
  bits<5> rs;

  bits<32> Inst;

  let Inst{31-26} = 0;
  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
  let Inst{15-11} = rd;
  let Inst{10}    = rotate;
  let Inst{9-0}   = funct;
}
Akira Hatanaka's avatar
[mips] Add definitions of micromips load and store instructions.  
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class LW_FM_MM<bits<6> op> : MMArch {
  bits<5> rt;
  bits<21> addr;

  bits<32> Inst;

  let Inst{31-26} = op;
  let Inst{25-21} = rt;
  let Inst{20-16} = addr{20-16};
  let Inst{15-0}  = addr{15-0};
}
Jack Carter's avatar
[Mips] Support for unaligned load/store microMips instructions  
Jack Carter committed
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class LWL_FM_MM<bits<4> funct> {
  bits<5> rt;
  bits<21> addr;

  bits<32> Inst;

  let Inst{31-26} = 0x18;
  let Inst{25-21} = rt;
  let Inst{20-16} = addr{20-16};
  let Inst{15-12} = funct;
  let Inst{11-0}  = addr{11-0};
}
Vladimir Medic's avatar
This patch adds support for microMIPS Move Conditional instructions. Test...  
Vladimir Medic committed
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class CMov_F_I_FM_MM<bits<7> func> : MMArch {
  bits<5> rd;
  bits<5> rs;
  bits<3> fcc;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = rd;
  let Inst{20-16} = rs;
  let Inst{15-13} = fcc;
  let Inst{12-6}  = func;
  let Inst{5-0}   = 0x3b;
}
Vladimir Medic's avatar
This patch adds support for microMIPS Move to/from HI/LO instructions. Test...  
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class MTLO_FM_MM<bits<10> funct> : MMArch {
  bits<5> rs;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = 0x00;
  let Inst{20-16} = rs;
  let Inst{15-6}  = funct;
  let Inst{5-0}   = 0x3c;
}

class MFLO_FM_MM<bits<10> funct> : MMArch {
  bits<5> rd;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = 0x00;
  let Inst{20-16} = rd;
  let Inst{15-6}  = funct;
  let Inst{5-0}   = 0x3c;
}
Zoran Jovanovic's avatar
Support for misc microMIPS instructions.  
Zoran Jovanovic committed
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class CLO_FM_MM<bits<10> funct> : MMArch {
  bits<5> rd;
  bits<5> rs;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = rd;
  let Inst{20-16} = rs;
  let Inst{15-6}  = funct;
  let Inst{5-0}   = 0x3c;
}

class SEB_FM_MM<bits<10> funct> : MMArch {
  bits<5> rd;
  bits<5> rt;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = rd;
  let Inst{20-16} = rt;
  let Inst{15-6}  = funct;
  let Inst{5-0}   = 0x3c;
}

class EXT_FM_MM<bits<6> funct> : MMArch {
  bits<5> rt;
  bits<5> rs;
  bits<5> pos;
  bits<5> size;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
  let Inst{15-11} = size;
  let Inst{10-6}  = pos;
  let Inst{5-0}   = funct;
}
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Support for microMIPS jump instructions  
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class J_FM_MM<bits<6> op> : MMArch {
  bits<26> target;

  bits<32> Inst;

  let Inst{31-26} = op;
  let Inst{25-0}  = target;
}

class JR_FM_MM<bits<8> funct> : MMArch {
  bits<5> rs;

  bits<32> Inst;

  let Inst{31-21} = 0x00;
  let Inst{20-16} = rs;
  let Inst{15-14} = 0x0;
  let Inst{13-6}  = funct;
  let Inst{5-0}   = 0x3c;
}

class JALR_FM_MM<bits<10> funct> : MMArch {
  bits<5> rs;
  bits<5> rd;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = rd;
  let Inst{20-16} = rs;
  let Inst{15-6}  = funct;
  let Inst{5-0}   = 0x3c;
}
Zoran Jovanovic's avatar
Support for microMIPS branch instructions.  
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class BEQ_FM_MM<bits<6> op> : MMArch {
  bits<5>  rs;
  bits<5>  rt;
  bits<16> offset;

  bits<32> Inst;

  let Inst{31-26} = op;
  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
  let Inst{15-0}  = offset;
}

class BGEZ_FM_MM<bits<5> funct> : MMArch {
  bits<5>  rs;
  bits<16> offset;

  bits<32> Inst;

  let Inst{31-26} = 0x10;
  let Inst{25-21} = funct;
  let Inst{20-16} = rs;
  let Inst{15-0}  = offset;
}

class BGEZAL_FM_MM<bits<5> funct> : MMArch {
  bits<5>  rs;
  bits<16> offset;

  bits<32> Inst;

  let Inst{31-26} = 0x10;
  let Inst{25-21} = funct;
  let Inst{20-16} = rs;
  let Inst{15-0}  = offset;
}
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Support for microMIPS trap instructions 1.  
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class TEQ_FM_MM<bits<6> funct> : MMArch {
  bits<5> rs;
  bits<5> rt;
  bits<4> code_;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
  let Inst{15-12} = code_;
  let Inst{11-6}  = funct;
  let Inst{5-0}   = 0x3c;
}
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Support for microMIPS trap instruction with immediate operands.  
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class TEQI_FM_MM<bits<5> funct> : MMArch {
  bits<5> rs;
  bits<16> imm16;

  bits<32> Inst;

  let Inst{31-26} = 0x10;
  let Inst{25-21} = funct;
  let Inst{20-16} = rs;
  let Inst{15-0}  = imm16;
}