640 lines
16 KiB
TableGen
640 lines
16 KiB
TableGen
//===- Mips16InstrFormats.td - Mips Instruction Formats ----*- tablegen -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Describe MIPS instructions format
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//
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// CPU INSTRUCTION FORMATS
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//
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// funct or f Function field
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//
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// immediate 4-,5-,8- or 11-bit immediate, branch displacement, or
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// or imm address displacement
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//
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// op 5-bit major operation code
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//
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// rx 3-bit source or destination register
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//
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// ry 3-bit source or destination register
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//
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// rz 3-bit source or destination register
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//
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// sa 3- or 5-bit shift amount
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//
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//===----------------------------------------------------------------------===//
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// Base class for Mips 16 Format
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// This class does not depend on the instruction size
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//
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class MipsInst16_Base<dag outs, dag ins, string asmstr, list<dag> pattern,
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InstrItinClass itin>: Instruction
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{
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let Namespace = "Mips";
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let OutOperandList = outs;
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let InOperandList = ins;
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let AsmString = asmstr;
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let Pattern = pattern;
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let Itinerary = itin;
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let Predicates = [InMips16Mode];
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}
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//
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// Generic Mips 16 Format
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//
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class MipsInst16<dag outs, dag ins, string asmstr, list<dag> pattern,
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InstrItinClass itin>:
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MipsInst16_Base<outs, ins, asmstr, pattern, itin>
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{
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field bits<16> Inst;
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bits<5> Opcode = 0;
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// Top 5 bits are the 'opcode' field
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let Inst{15-11} = Opcode;
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let Size=2;
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field bits<16> SoftFail = 0;
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}
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//
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// For 32 bit extended instruction forms.
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//
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class MipsInst16_32<dag outs, dag ins, string asmstr, list<dag> pattern,
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InstrItinClass itin>:
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MipsInst16_Base<outs, ins, asmstr, pattern, itin>
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{
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field bits<32> Inst;
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let Size=4;
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field bits<32> SoftFail = 0;
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}
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class MipsInst16_EXTEND<dag outs, dag ins, string asmstr, list<dag> pattern,
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InstrItinClass itin>:
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MipsInst16_32<outs, ins, asmstr, pattern, itin>
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{
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let Inst{31-27} = 0b11110;
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}
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// Mips Pseudo Instructions Format
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class MipsPseudo16<dag outs, dag ins, string asmstr, list<dag> pattern>:
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MipsInst16<outs, ins, asmstr, pattern, IIPseudo> {
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let isCodeGenOnly = 1;
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let isPseudo = 1;
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}
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//===----------------------------------------------------------------------===//
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// Format I instruction class in Mips : <|opcode|imm11|>
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//===----------------------------------------------------------------------===//
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class FI16<bits<5> op, dag outs, dag ins, string asmstr, list<dag> pattern,
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InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<11> imm11;
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let Opcode = op;
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let Inst{10-0} = imm11;
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}
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//===----------------------------------------------------------------------===//
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// Format RI instruction class in Mips : <|opcode|rx|imm8|>
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//===----------------------------------------------------------------------===//
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class FRI16<bits<5> op, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> rx;
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bits<8> imm8;
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let Opcode = op;
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let Inst{10-8} = rx;
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let Inst{7-0} = imm8;
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}
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//===----------------------------------------------------------------------===//
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// Format RR instruction class in Mips : <|opcode|rx|ry|funct|>
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//===----------------------------------------------------------------------===//
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class FRR16<bits<5> _funct, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> rx;
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bits<3> ry;
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bits<5> funct;
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let Opcode = 0b11101;
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let funct = _funct;
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let Inst{10-8} = rx;
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let Inst{7-5} = ry;
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let Inst{4-0} = funct;
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}
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class FRRBreak16<dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<6> Code;
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bits<5> funct;
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let Opcode = 0b11101;
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let funct = 0b00101;
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let Inst{10-5} = Code;
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let Inst{4-0} = funct;
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}
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//
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// For conversion functions.
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//
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class FRR_SF16<bits<5> _funct, bits<3> _subfunct, dag outs, dag ins,
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string asmstr, list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> rx;
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bits<3> subfunct;
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bits<5> funct;
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let Opcode = 0b11101; // RR
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let funct = _funct;
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let subfunct = _subfunct;
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let Inst{10-8} = rx;
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let Inst{7-5} = subfunct;
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let Inst{4-0} = funct;
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}
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//
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// just used for breakpoint (hardware and software) instructions.
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//
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class FC16<bits<5> _funct, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<6> _code; // code is a keyword in tablegen
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bits<5> funct;
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let Opcode = 0b11101; // RR
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let funct = _funct;
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let Inst{10-5} = _code;
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let Inst{4-0} = funct;
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}
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//
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// J(AL)R(C) subformat
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//
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class FRR16_JALRC<bits<1> _nd, bits<1> _l, bits<1> r_a,
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dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> rx;
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bits<1> nd;
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bits<1> l;
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bits<1> ra;
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let nd = _nd;
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let l = _l;
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let ra = r_a;
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let Opcode = 0b11101;
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let Inst{10-8} = rx;
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let Inst{7} = nd;
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let Inst{6} = l;
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let Inst{5} = ra;
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let Inst{4-0} = 0;
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}
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//===----------------------------------------------------------------------===//
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// Format RRI instruction class in Mips : <|opcode|rx|ry|imm5|>
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//===----------------------------------------------------------------------===//
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class FRRI16<bits<5> op, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> rx;
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bits<3> ry;
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bits<5> imm5;
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let Opcode = op;
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let Inst{10-8} = rx;
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let Inst{7-5} = ry;
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let Inst{4-0} = imm5;
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}
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//===----------------------------------------------------------------------===//
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// Format RRR instruction class in Mips : <|opcode|rx|ry|rz|f|>
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//===----------------------------------------------------------------------===//
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class FRRR16<bits<2> _f, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> rx;
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bits<3> ry;
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bits<3> rz;
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bits<2> f;
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let Opcode = 0b11100;
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let f = _f;
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let Inst{10-8} = rx;
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let Inst{7-5} = ry;
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let Inst{4-2} = rz;
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let Inst{1-0} = f;
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}
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//===----------------------------------------------------------------------===//
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// Format RRI-A instruction class in Mips : <|opcode|rx|ry|f|imm4|>
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//===----------------------------------------------------------------------===//
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class FRRI_A16<bits<1> _f, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> rx;
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bits<3> ry;
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bits<1> f;
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bits<4> imm4;
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let Opcode = 0b01000;
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let f = _f;
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let Inst{10-8} = rx;
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let Inst{7-5} = ry;
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let Inst{4} = f;
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let Inst{3-0} = imm4;
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}
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//===----------------------------------------------------------------------===//
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// Format Shift instruction class in Mips : <|opcode|rx|ry|sa|f|>
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//===----------------------------------------------------------------------===//
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class FSHIFT16<bits<2> _f, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> rx;
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bits<3> ry;
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bits<3> sa;
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bits<2> f;
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let Opcode = 0b00110;
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let f = _f;
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let Inst{10-8} = rx;
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let Inst{7-5} = ry;
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let Inst{4-2} = sa;
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let Inst{1-0} = f;
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}
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//===----------------------------------------------------------------------===//
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// Format i8 instruction class in Mips : <|opcode|funct|imm8>
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//===----------------------------------------------------------------------===//
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class FI816<bits<3> _func, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> func;
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bits<8> imm8;
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let Opcode = 0b01100;
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let func = _func;
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let Inst{10-8} = func;
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let Inst{7-0} = imm8;
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}
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//===----------------------------------------------------------------------===//
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// Format i8_MOVR32 instruction class in Mips : <|opcode|func|ry|r32>
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//===----------------------------------------------------------------------===//
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class FI8_MOVR3216<dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<4> ry;
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bits<4> r32;
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let Opcode = 0b01100;
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let Inst{10-8} = 0b111;
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let Inst{7-4} = ry;
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let Inst{3-0} = r32;
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}
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//===----------------------------------------------------------------------===//
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// Format i8_MOV32R instruction class in Mips : <|opcode|func|r32|rz>
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//===----------------------------------------------------------------------===//
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class FI8_MOV32R16<dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<3> func;
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bits<5> r32;
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bits<3> rz;
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let Opcode = 0b01100;
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let Inst{10-8} = 0b101;
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let Inst{7-5} = r32{2-0};
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let Inst{4-3} = r32{4-3};
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let Inst{2-0} = rz;
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}
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//===----------------------------------------------------------------------===//
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// Format i8_SVRS instruction class in Mips :
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// <|opcode|svrs|s|ra|s0|s1|framesize>
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//===----------------------------------------------------------------------===//
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class FI8_SVRS16<bits<1> _s, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16<outs, ins, asmstr, pattern, itin>
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{
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bits<1> s;
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bits<1> ra = 0;
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bits<1> s0 = 0;
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bits<1> s1 = 0;
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bits<4> framesize = 0;
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let s =_s;
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let Opcode = 0b01100;
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let Inst{10-8} = 0b100;
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let Inst{7} = s;
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let Inst{6} = ra;
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let Inst{5} = s0;
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let Inst{4} = s1;
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let Inst{3-0} = framesize;
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}
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//===----------------------------------------------------------------------===//
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// Format JAL instruction class in Mips16 :
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// <|opcode|svrs|s|ra|s0|s1|framesize>
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//===----------------------------------------------------------------------===//
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class FJAL16<bits<1> _X, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16_32<outs, ins, asmstr, pattern, itin>
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{
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bits<1> X;
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bits<26> imm26;
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let X = _X;
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let Inst{31-27} = 0b00011;
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let Inst{26} = X;
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let Inst{25-21} = imm26{20-16};
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let Inst{20-16} = imm26{25-21};
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let Inst{15-0} = imm26{15-0};
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}
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//===----------------------------------------------------------------------===//
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// Format EXT-I instruction class in Mips16 :
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// <|EXTEND|imm10:5|imm15:11|op|0|0|0|0|0|0|imm4:0>
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//===----------------------------------------------------------------------===//
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class FEXT_I16<bits<5> _eop, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16_EXTEND<outs, ins, asmstr, pattern, itin>
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{
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bits<16> imm16;
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bits<5> eop;
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let eop = _eop;
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let Inst{26-21} = imm16{10-5};
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let Inst{20-16} = imm16{15-11};
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let Inst{15-11} = eop;
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let Inst{10-5} = 0;
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let Inst{4-0} = imm16{4-0};
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}
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//===----------------------------------------------------------------------===//
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// Format ASMACRO instruction class in Mips16 :
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// <EXTEND|select|p4|p3|RRR|p2|p1|p0>
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//===----------------------------------------------------------------------===//
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class FASMACRO16<dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16_EXTEND<outs, ins, asmstr, pattern, itin>
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{
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bits<3> select;
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bits<3> p4;
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bits<5> p3;
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bits<5> RRR = 0b11100;
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bits<3> p2;
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bits<3> p1;
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bits<5> p0;
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let Inst{26-24} = select;
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let Inst{23-21} = p4;
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let Inst{20-16} = p3;
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let Inst{15-11} = RRR;
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let Inst{10-8} = p2;
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let Inst{7-5} = p1;
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let Inst{4-0} = p0;
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}
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//===----------------------------------------------------------------------===//
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// Format EXT-RI instruction class in Mips16 :
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// <|EXTEND|imm10:5|imm15:11|op|rx|0|0|0|imm4:0>
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//===----------------------------------------------------------------------===//
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class FEXT_RI16<bits<5> _op, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16_EXTEND<outs, ins, asmstr, pattern, itin>
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{
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bits<16> imm16;
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bits<5> op;
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bits<3> rx;
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let op = _op;
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let Inst{26-21} = imm16{10-5};
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let Inst{20-16} = imm16{15-11};
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let Inst{15-11} = op;
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let Inst{10-8} = rx;
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let Inst{7-5} = 0;
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let Inst{4-0} = imm16{4-0};
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}
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//===----------------------------------------------------------------------===//
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// Format EXT-RRI instruction class in Mips16 :
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// <|EXTEND|imm10:5|imm15:11|op|rx|ry|imm4:0>
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//===----------------------------------------------------------------------===//
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class FEXT_RRI16<bits<5> _op, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16_EXTEND<outs, ins, asmstr, pattern, itin>
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{
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bits<5> op;
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bits<16> imm16;
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bits<3> rx;
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bits<3> ry;
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let op=_op;
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let Inst{26-21} = imm16{10-5};
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let Inst{20-16} = imm16{15-11};
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let Inst{15-11} = op;
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let Inst{10-8} = rx;
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let Inst{7-5} = ry;
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let Inst{4-0} = imm16{4-0};
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}
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//===----------------------------------------------------------------------===//
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// Format EXT-RRI-A instruction class in Mips16 :
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// <|EXTEND|imm10:4|imm14:11|RRI-A|rx|ry|f|imm3:0>
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//===----------------------------------------------------------------------===//
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class FEXT_RRI_A16<bits<1> _f, dag outs, dag ins, string asmstr,
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list<dag> pattern, InstrItinClass itin>:
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MipsInst16_EXTEND<outs, ins, asmstr, pattern, itin>
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{
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bits<15> imm15;
|
|
bits<3> rx;
|
|
bits<3> ry;
|
|
bits<1> f;
|
|
|
|
let f = _f;
|
|
|
|
let Inst{26-20} = imm15{10-4};
|
|
let Inst{19-16} = imm15{14-11};
|
|
let Inst{15-11} = 0b01000;
|
|
let Inst{10-8} = rx;
|
|
let Inst{7-5} = ry;
|
|
let Inst{4} = f;
|
|
let Inst{3-0} = imm15{3-0};
|
|
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Format EXT-SHIFT instruction class in Mips16 :
|
|
// <|EXTEND|sa 4:0|s5|0|SHIFT|rx|ry|0|f>
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
class FEXT_SHIFT16<bits<2> _f, dag outs, dag ins, string asmstr,
|
|
list<dag> pattern, InstrItinClass itin>:
|
|
MipsInst16_EXTEND<outs, ins, asmstr, pattern, itin>
|
|
{
|
|
bits<6> sa6;
|
|
bits<3> rx;
|
|
bits<3> ry;
|
|
bits<2> f;
|
|
|
|
let f = _f;
|
|
|
|
let Inst{26-22} = sa6{4-0};
|
|
let Inst{21} = sa6{5};
|
|
let Inst{20-16} = 0;
|
|
let Inst{15-11} = 0b00110;
|
|
let Inst{10-8} = rx;
|
|
let Inst{7-5} = ry;
|
|
let Inst{4-2} = 0;
|
|
let Inst{1-0} = f;
|
|
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Format EXT-I8 instruction class in Mips16 :
|
|
// <|EXTEND|imm10:5|imm15:11|I8|funct|0|imm4:0>
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
class FEXT_I816<bits<3> _funct, dag outs, dag ins, string asmstr,
|
|
list<dag> pattern, InstrItinClass itin>:
|
|
MipsInst16_EXTEND<outs, ins, asmstr, pattern, itin>
|
|
{
|
|
bits<16> imm16;
|
|
bits<5> I8;
|
|
bits<3> funct;
|
|
|
|
let funct = _funct;
|
|
let I8 = 0b00110;
|
|
|
|
let Inst{26-21} = imm16{10-5};
|
|
let Inst{20-16} = imm16{15-11};
|
|
let Inst{15-11} = I8;
|
|
let Inst{10-8} = funct;
|
|
let Inst{7-5} = 0;
|
|
let Inst{4-0} = imm16{4-0};
|
|
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Format EXT-I8_SVRS instruction class in Mips16 :
|
|
// <|EXTEND|xsregs|framesize7:4|aregs|I8|SVRS|s|ra|s0|s1|framesize3:0>
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
class FEXT_I8_SVRS16<bits<1> s_, dag outs, dag ins, string asmstr,
|
|
list<dag> pattern, InstrItinClass itin>:
|
|
MipsInst16_EXTEND<outs, ins, asmstr, pattern, itin>
|
|
{
|
|
bits<3> xsregs =0;
|
|
bits<8> framesize =0;
|
|
bits<3> aregs =0;
|
|
bits<5> I8 = 0b01100;
|
|
bits<3> SVRS = 0b100;
|
|
bits<1> s;
|
|
bits<1> ra = 0;
|
|
bits<1> s0 = 0;
|
|
bits<1> s1 = 0;
|
|
|
|
let s= s_;
|
|
|
|
let Inst{26-24} = xsregs;
|
|
let Inst{23-20} = framesize{7-4};
|
|
let Inst{19} = 0;
|
|
let Inst{18-16} = aregs;
|
|
let Inst{15-11} = I8;
|
|
let Inst{10-8} = SVRS;
|
|
let Inst{7} = s;
|
|
let Inst{6} = ra;
|
|
let Inst{5} = s0;
|
|
let Inst{4} = s1;
|
|
let Inst{3-0} = framesize{3-0};
|
|
|
|
|
|
}
|
|
|