//===----------------------------------------------------------------------===//
// MicroMIPS Base Classes
//===----------------------------------------------------------------------===//

//
// Base class for MicroMips instructions.
// This class does not depend on the instruction size.
//
class MicroMipsInstBase<dag outs, dag ins, string asmstr, list<dag> pattern,
                        InstrItinClass itin, Format f> : Instruction
{
  let Namespace = "Mips";
  let DecoderNamespace = "MicroMips";

  let OutOperandList = outs;
  let InOperandList  = ins;

  let AsmString   = asmstr;
  let Pattern     = pattern;
  let Itinerary   = itin;

  let Predicates = [InMicroMips];

  Format Form = f;
}

//
// Base class for MicroMIPS 16-bit instructions.
//
class MicroMipsInst16<dag outs, dag ins, string asmstr, list<dag> pattern,
               InstrItinClass itin, Format f> :
  MicroMipsInstBase<outs, ins, asmstr, pattern, itin, f>
{
  let Size = 2;
  field bits<16> Inst;
  field bits<16> SoftFail = 0;
  bits<6> Opcode = 0x0;
}

//===----------------------------------------------------------------------===//
// MicroMIPS 16-bit Instruction Formats
//===----------------------------------------------------------------------===//

class MOVE_FM_MM16<bits<6> funct> {
  bits<5> rs;
  bits<5> rd;

  bits<16> Inst;

  let Inst{15-10} = funct;
  let Inst{9-5}   = rd;
  let Inst{4-0}   = rs;
}

class JALR_FM_MM16<bits<5> op> {
  bits<5> rs;

  bits<16> Inst;

  let Inst{15-10} = 0x11;
  let Inst{9-5}   = op;
  let Inst{4-0}   = rs;
}

//===----------------------------------------------------------------------===//
// MicroMIPS 32-bit Instruction Formats
//===----------------------------------------------------------------------===//

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;
  let Inst{25-21} = rt;
  let Inst{20-16} = rs;
  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;
}

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;
}

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};
}

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};
}

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;
}

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;
}

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;
}

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> {
  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;
}

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;
}

class SYNC_FM_MM : MMArch {
  bits<5> stype;

  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-21} = 0x0;
  let Inst{20-16} = stype;
  let Inst{15-6}  = 0x1ad;
  let Inst{5-0}   = 0x3c;
}

class BRK_FM_MM : MMArch {
  bits<10> code_1;
  bits<10> code_2;
  bits<32> Inst;
  let Inst{31-26} = 0x0;
  let Inst{25-16} = code_1;
  let Inst{15-6}  = code_2;
  let Inst{5-0}   = 0x07;
}

class SYS_FM_MM : MMArch {
  bits<10> code_;
  bits<32> Inst;
  let Inst{31-26} = 0x0;
  let Inst{25-16} = code_;
  let Inst{15-6}  = 0x22d;
  let Inst{5-0}   = 0x3c;
}

class WAIT_FM_MM {
  bits<10> code_;
  bits<32> Inst;

  let Inst{31-26} = 0x00;
  let Inst{25-16} = code_;
  let Inst{15-6}  = 0x24d;
  let Inst{5-0}   = 0x3c;
}

class ER_FM_MM<bits<10> funct> : MMArch {
  bits<32> Inst;

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

class EI_FM_MM<bits<10> funct> : MMArch {
  bits<32> Inst;
  bits<5> rt;

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

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;
}

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;
}

class LL_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};
}

class ADDS_FM_MM<bits<2> fmt, bits<8> funct> : MMArch {
  bits<5> ft;
  bits<5> fs;
  bits<5> fd;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = ft;
  let Inst{20-16} = fs;
  let Inst{15-11} = fd;
  let Inst{10}    = 0;
  let Inst{9-8}   = fmt;
  let Inst{7-0}   = funct;

  list<dag> Pattern = [];
}

class LWXC1_FM_MM<bits<9> funct> : MMArch {
  bits<5> fd;
  bits<5> base;
  bits<5> index;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = index;
  let Inst{20-16} = base;
  let Inst{15-11} = fd;
  let Inst{10-9}  = 0x0;
  let Inst{8-0}   = funct;
}

class SWXC1_FM_MM<bits<9> funct> : MMArch {
  bits<5> fs;
  bits<5> base;
  bits<5> index;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = index;
  let Inst{20-16} = base;
  let Inst{15-11} = fs;
  let Inst{10-9}  = 0x0;
  let Inst{8-0}   = funct;
}

class CEQS_FM_MM<bits<2> fmt> : MMArch {
  bits<5> fs;
  bits<5> ft;
  bits<4> cond;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = ft;
  let Inst{20-16} = fs;
  let Inst{15-13} = 0x0;  // cc
  let Inst{12}    = 0;
  let Inst{11-10} = fmt;
  let Inst{9-6}   = cond;
  let Inst{5-0}   = 0x3c;
}

class BC1F_FM_MM<bits<5> tf> : MMArch {
  bits<16> offset;

  bits<32> Inst;

  let Inst{31-26} = 0x10;
  let Inst{25-21} = tf;
  let Inst{20-18} = 0x0; // cc
  let Inst{17-16} = 0x0;
  let Inst{15-0}  = offset;
}

class ROUND_W_FM_MM<bits<1> fmt, bits<8> funct> : MMArch {
  bits<5> fd;
  bits<5> fs;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = fd;
  let Inst{20-16} = fs;
  let Inst{15}    = 0;
  let Inst{14}    = fmt;
  let Inst{13-6}  = funct;
  let Inst{5-0}   = 0x3b;
}

class ABS_FM_MM<bits<2> fmt, bits<7> funct> : MMArch {
  bits<5> fd;
  bits<5> fs;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = fd;
  let Inst{20-16} = fs;
  let Inst{15}    = 0;
  let Inst{14-13} = fmt;
  let Inst{12-6}  = funct;
  let Inst{5-0}   = 0x3b;
}

class CMov_F_F_FM_MM<bits<9> func, bits<2> fmt> : MMArch {
  bits<5> fd;
  bits<5> fs;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = fd;
  let Inst{20-16} = fs;
  let Inst{15-13} = 0x0; //cc
  let Inst{12-11} = 0x0;
  let Inst{10-9}  = fmt;
  let Inst{8-0}   = func;
}

class CMov_I_F_FM_MM<bits<8> funct, bits<2> fmt> : MMArch {
  bits<5> fd;
  bits<5> fs;
  bits<5> rt;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = rt;
  let Inst{20-16} = fs;
  let Inst{15-11} = fd;
  let Inst{9-8}   = fmt;
  let Inst{7-0}   = funct;
}

class MFC1_FM_MM<bits<8> funct> : MMArch {
  bits<5> rt;
  bits<5> fs;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = rt;
  let Inst{20-16} = fs;
  let Inst{15-14} = 0x0;
  let Inst{13-6}  = funct;
  let Inst{5-0}   = 0x3b;
}

class MADDS_FM_MM<bits<6> funct>: MMArch {
  bits<5> ft;
  bits<5> fs;
  bits<5> fd;
  bits<5> fr;

  bits<32> Inst;

  let Inst{31-26} = 0x15;
  let Inst{25-21} = ft;
  let Inst{20-16} = fs;
  let Inst{15-11} = fd;
  let Inst{10-6}  = fr;
  let Inst{5-0}   = funct;
}