llvm-6502/lib/Target/Mips/MipsInstrFormats.td
Akira Hatanaka f894199a14 [mips] Trap on integer division by zero.
By default, a teq instruction is inserted after integer divide. No divide-by-zero
checks are performed if option "-mnocheck-zero-division" is used.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182306 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-20 18:07:43 +00:00

700 lines
14 KiB
TableGen

//===-- MipsInstrFormats.td - Mips Instruction Formats -----*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Describe MIPS instructions format
//
// CPU INSTRUCTION FORMATS
//
// opcode - operation code.
// rs - src reg.
// rt - dst reg (on a 2 regs instr) or src reg (on a 3 reg instr).
// rd - dst reg, only used on 3 regs instr.
// shamt - only used on shift instructions, contains the shift amount.
// funct - combined with opcode field give us an operation code.
//
//===----------------------------------------------------------------------===//
// Format specifies the encoding used by the instruction. This is part of the
// ad-hoc solution used to emit machine instruction encodings by our machine
// code emitter.
class Format<bits<4> val> {
bits<4> Value = val;
}
def Pseudo : Format<0>;
def FrmR : Format<1>;
def FrmI : Format<2>;
def FrmJ : Format<3>;
def FrmFR : Format<4>;
def FrmFI : Format<5>;
def FrmOther : Format<6>; // Instruction w/ a custom format
class MMRel;
def Std2MicroMips : InstrMapping {
let FilterClass = "MMRel";
// Instructions with the same BaseOpcode and isNVStore values form a row.
let RowFields = ["BaseOpcode"];
// Instructions with the same predicate sense form a column.
let ColFields = ["Arch"];
// The key column is the unpredicated instructions.
let KeyCol = ["se"];
// Value columns are PredSense=true and PredSense=false
let ValueCols = [["se"], ["micromips"]];
}
class StdArch {
string Arch = "se";
}
// Generic Mips Format
class MipsInst<dag outs, dag ins, string asmstr, list<dag> pattern,
InstrItinClass itin, Format f>: Instruction
{
field bits<32> Inst;
Format Form = f;
let Namespace = "Mips";
let Size = 4;
bits<6> Opcode = 0;
// Top 6 bits are the 'opcode' field
let Inst{31-26} = Opcode;
let OutOperandList = outs;
let InOperandList = ins;
let AsmString = asmstr;
let Pattern = pattern;
let Itinerary = itin;
//
// Attributes specific to Mips instructions...
//
bits<4> FormBits = Form.Value;
// TSFlags layout should be kept in sync with MipsInstrInfo.h.
let TSFlags{3-0} = FormBits;
let DecoderNamespace = "Mips";
field bits<32> SoftFail = 0;
}
// Mips32/64 Instruction Format
class InstSE<dag outs, dag ins, string asmstr, list<dag> pattern,
InstrItinClass itin, Format f, string opstr = ""> :
MipsInst<outs, ins, asmstr, pattern, itin, f> {
let Predicates = [HasStdEnc];
string BaseOpcode = opstr;
string Arch;
}
// Mips Pseudo Instructions Format
class MipsPseudo<dag outs, dag ins, list<dag> pattern,
InstrItinClass itin = IIPseudo> :
MipsInst<outs, ins, "", pattern, itin, Pseudo> {
let isCodeGenOnly = 1;
let isPseudo = 1;
}
// Mips32/64 Pseudo Instruction Format
class PseudoSE<dag outs, dag ins, list<dag> pattern,
InstrItinClass itin = IIPseudo>:
MipsPseudo<outs, ins, pattern, itin> {
let Predicates = [HasStdEnc];
}
// Pseudo-instructions for alternate assembly syntax (never used by codegen).
// These are aliases that require C++ handling to convert to the target
// instruction, while InstAliases can be handled directly by tblgen.
class MipsAsmPseudoInst<dag outs, dag ins, string asmstr>:
MipsInst<outs, ins, asmstr, [], IIPseudo, Pseudo> {
let isPseudo = 1;
let Pattern = [];
}
//===----------------------------------------------------------------------===//
// Format R instruction class in Mips : <|opcode|rs|rt|rd|shamt|funct|>
//===----------------------------------------------------------------------===//
class FR<bits<6> op, bits<6> _funct, dag outs, dag ins, string asmstr,
list<dag> pattern, InstrItinClass itin>:
InstSE<outs, ins, asmstr, pattern, itin, FrmR>
{
bits<5> rd;
bits<5> rs;
bits<5> rt;
bits<5> shamt;
bits<6> funct;
let Opcode = op;
let funct = _funct;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-11} = rd;
let Inst{10-6} = shamt;
let Inst{5-0} = funct;
}
//===----------------------------------------------------------------------===//
// Format I instruction class in Mips : <|opcode|rs|rt|immediate|>
//===----------------------------------------------------------------------===//
class FI<bits<6> op, dag outs, dag ins, string asmstr, list<dag> pattern,
InstrItinClass itin>: InstSE<outs, ins, asmstr, pattern, itin, FrmI>
{
bits<5> rt;
bits<5> rs;
bits<16> imm16;
let Opcode = op;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-0} = imm16;
}
class BranchBase<bits<6> op, dag outs, dag ins, string asmstr,
list<dag> pattern, InstrItinClass itin>:
InstSE<outs, ins, asmstr, pattern, itin, FrmI>
{
bits<5> rs;
bits<5> rt;
bits<16> imm16;
let Opcode = op;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-0} = imm16;
}
//===----------------------------------------------------------------------===//
// Format J instruction class in Mips : <|opcode|address|>
//===----------------------------------------------------------------------===//
class FJ<bits<6> op>
{
bits<26> target;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-0} = target;
}
//===----------------------------------------------------------------------===//
// MFC instruction class in Mips : <|op|mf|rt|rd|0000000|sel|>
//===----------------------------------------------------------------------===//
class MFC3OP_FM<bits<6> op, bits<5> mfmt>
{
bits<5> rt;
bits<5> rd;
bits<3> sel;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-21} = mfmt;
let Inst{20-16} = rt;
let Inst{15-11} = rd;
let Inst{10-3} = 0;
let Inst{2-0} = sel;
}
class ADD_FM<bits<6> op, bits<6> funct> : StdArch {
bits<5> rd;
bits<5> rs;
bits<5> rt;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-11} = rd;
let Inst{10-6} = 0;
let Inst{5-0} = funct;
}
class ADDI_FM<bits<6> op> : StdArch {
bits<5> rs;
bits<5> rt;
bits<16> imm16;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-0} = imm16;
}
class SRA_FM<bits<6> funct, bit rotate> : StdArch {
bits<5> rd;
bits<5> rt;
bits<5> shamt;
bits<32> Inst;
let Inst{31-26} = 0;
let Inst{25-22} = 0;
let Inst{21} = rotate;
let Inst{20-16} = rt;
let Inst{15-11} = rd;
let Inst{10-6} = shamt;
let Inst{5-0} = funct;
}
class SRLV_FM<bits<6> funct, bit rotate> : StdArch {
bits<5> rd;
bits<5> rt;
bits<5> rs;
bits<32> Inst;
let Inst{31-26} = 0;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-11} = rd;
let Inst{10-7} = 0;
let Inst{6} = rotate;
let Inst{5-0} = funct;
}
class BEQ_FM<bits<6> op> {
bits<5> rs;
bits<5> rt;
bits<16> offset;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-0} = offset;
}
class BGEZ_FM<bits<6> op, bits<5> funct> {
bits<5> rs;
bits<16> offset;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-21} = rs;
let Inst{20-16} = funct;
let Inst{15-0} = offset;
}
class B_FM {
bits<16> offset;
bits<32> Inst;
let Inst{31-26} = 4;
let Inst{25-21} = 0;
let Inst{20-16} = 0;
let Inst{15-0} = offset;
}
class SLTI_FM<bits<6> op> : StdArch {
bits<5> rt;
bits<5> rs;
bits<16> imm16;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-0} = imm16;
}
class MFLO_FM<bits<6> funct> {
bits<5> rd;
bits<32> Inst;
let Inst{31-26} = 0;
let Inst{25-16} = 0;
let Inst{15-11} = rd;
let Inst{10-6} = 0;
let Inst{5-0} = funct;
}
class MTLO_FM<bits<6> funct> {
bits<5> rs;
bits<32> Inst;
let Inst{31-26} = 0;
let Inst{25-21} = rs;
let Inst{20-6} = 0;
let Inst{5-0} = funct;
}
class SEB_FM<bits<5> funct, bits<6> funct2> {
bits<5> rd;
bits<5> rt;
bits<32> Inst;
let Inst{31-26} = 0x1f;
let Inst{25-21} = 0;
let Inst{20-16} = rt;
let Inst{15-11} = rd;
let Inst{10-6} = funct;
let Inst{5-0} = funct2;
}
class CLO_FM<bits<6> funct> {
bits<5> rd;
bits<5> rs;
bits<5> rt;
bits<32> Inst;
let Inst{31-26} = 0x1c;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-11} = rd;
let Inst{10-6} = 0;
let Inst{5-0} = funct;
let rt = rd;
}
class LUI_FM {
bits<5> rt;
bits<16> imm16;
bits<32> Inst;
let Inst{31-26} = 0xf;
let Inst{25-21} = 0;
let Inst{20-16} = rt;
let Inst{15-0} = imm16;
}
class JALR_FM {
bits<5> rd;
bits<5> rs;
bits<32> Inst;
let Inst{31-26} = 0;
let Inst{25-21} = rs;
let Inst{20-16} = 0;
let Inst{15-11} = rd;
let Inst{10-6} = 0;
let Inst{5-0} = 9;
}
class BAL_FM {
bits<16> offset;
bits<32> Inst;
let Inst{31-26} = 1;
let Inst{25-21} = 0;
let Inst{20-16} = 0x11;
let Inst{15-0} = offset;
}
class BGEZAL_FM<bits<5> funct> {
bits<5> rs;
bits<16> offset;
bits<32> Inst;
let Inst{31-26} = 1;
let Inst{25-21} = rs;
let Inst{20-16} = funct;
let Inst{15-0} = offset;
}
class SYNC_FM {
bits<5> stype;
bits<32> Inst;
let Inst{31-26} = 0;
let Inst{10-6} = stype;
let Inst{5-0} = 0xf;
}
class MULT_FM<bits<6> op, bits<6> funct> : StdArch {
bits<5> rs;
bits<5> rt;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-6} = 0;
let Inst{5-0} = funct;
}
class EXT_FM<bits<6> funct> {
bits<5> rt;
bits<5> rs;
bits<5> pos;
bits<5> size;
bits<32> Inst;
let Inst{31-26} = 0x1f;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-11} = size;
let Inst{10-6} = pos;
let Inst{5-0} = funct;
}
class RDHWR_FM {
bits<5> rt;
bits<5> rd;
bits<32> Inst;
let Inst{31-26} = 0x1f;
let Inst{25-21} = 0;
let Inst{20-16} = rt;
let Inst{15-11} = rd;
let Inst{10-6} = 0;
let Inst{5-0} = 0x3b;
}
class TEQ_FM<bits<6> funct> {
bits<5> rs;
bits<5> rt;
bits<10> code_;
bits<32> Inst;
let Inst{31-26} = 0;
let Inst{25-21} = rs;
let Inst{20-16} = rt;
let Inst{15-6} = code_;
let Inst{5-0} = funct;
}
//===----------------------------------------------------------------------===//
//
// FLOATING POINT INSTRUCTION FORMATS
//
// opcode - operation code.
// fs - src reg.
// ft - dst reg (on a 2 regs instr) or src reg (on a 3 reg instr).
// fd - dst reg, only used on 3 regs instr.
// fmt - double or single precision.
// funct - combined with opcode field give us an operation code.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Format FI instruction class in Mips : <|opcode|base|ft|immediate|>
//===----------------------------------------------------------------------===//
class FFI<bits<6> op, dag outs, dag ins, string asmstr, list<dag> pattern>:
InstSE<outs, ins, asmstr, pattern, NoItinerary, FrmFI>
{
bits<5> ft;
bits<5> base;
bits<16> imm16;
let Opcode = op;
let Inst{25-21} = base;
let Inst{20-16} = ft;
let Inst{15-0} = imm16;
}
class ADDS_FM<bits<6> funct, bits<5> fmt> {
bits<5> fd;
bits<5> fs;
bits<5> ft;
bits<32> Inst;
let Inst{31-26} = 0x11;
let Inst{25-21} = fmt;
let Inst{20-16} = ft;
let Inst{15-11} = fs;
let Inst{10-6} = fd;
let Inst{5-0} = funct;
}
class ABSS_FM<bits<6> funct, bits<5> fmt> {
bits<5> fd;
bits<5> fs;
bits<32> Inst;
let Inst{31-26} = 0x11;
let Inst{25-21} = fmt;
let Inst{20-16} = 0;
let Inst{15-11} = fs;
let Inst{10-6} = fd;
let Inst{5-0} = funct;
}
class MFC1_FM<bits<5> funct> {
bits<5> rt;
bits<5> fs;
bits<32> Inst;
let Inst{31-26} = 0x11;
let Inst{25-21} = funct;
let Inst{20-16} = rt;
let Inst{15-11} = fs;
let Inst{10-0} = 0;
}
class LW_FM<bits<6> op> : StdArch {
bits<5> rt;
bits<21> addr;
bits<32> Inst;
let Inst{31-26} = op;
let Inst{25-21} = addr{20-16};
let Inst{20-16} = rt;
let Inst{15-0} = addr{15-0};
}
class MADDS_FM<bits<3> funct, bits<3> fmt> {
bits<5> fd;
bits<5> fr;
bits<5> fs;
bits<5> ft;
bits<32> Inst;
let Inst{31-26} = 0x13;
let Inst{25-21} = fr;
let Inst{20-16} = ft;
let Inst{15-11} = fs;
let Inst{10-6} = fd;
let Inst{5-3} = funct;
let Inst{2-0} = fmt;
}
class LWXC1_FM<bits<6> funct> {
bits<5> fd;
bits<5> base;
bits<5> index;
bits<32> Inst;
let Inst{31-26} = 0x13;
let Inst{25-21} = base;
let Inst{20-16} = index;
let Inst{15-11} = 0;
let Inst{10-6} = fd;
let Inst{5-0} = funct;
}
class SWXC1_FM<bits<6> funct> {
bits<5> fs;
bits<5> base;
bits<5> index;
bits<32> Inst;
let Inst{31-26} = 0x13;
let Inst{25-21} = base;
let Inst{20-16} = index;
let Inst{15-11} = fs;
let Inst{10-6} = 0;
let Inst{5-0} = funct;
}
class BC1F_FM<bit nd, bit tf> {
bits<16> offset;
bits<32> Inst;
let Inst{31-26} = 0x11;
let Inst{25-21} = 0x8;
let Inst{20-18} = 0; // cc
let Inst{17} = nd;
let Inst{16} = tf;
let Inst{15-0} = offset;
}
class CEQS_FM<bits<5> fmt> {
bits<5> fs;
bits<5> ft;
bits<4> cond;
bits<32> Inst;
let Inst{31-26} = 0x11;
let Inst{25-21} = fmt;
let Inst{20-16} = ft;
let Inst{15-11} = fs;
let Inst{10-8} = 0; // cc
let Inst{7-4} = 0x3;
let Inst{3-0} = cond;
}
class CMov_I_F_FM<bits<6> funct, bits<5> fmt> {
bits<5> fd;
bits<5> fs;
bits<5> rt;
bits<32> Inst;
let Inst{31-26} = 0x11;
let Inst{25-21} = fmt;
let Inst{20-16} = rt;
let Inst{15-11} = fs;
let Inst{10-6} = fd;
let Inst{5-0} = funct;
}
class CMov_F_I_FM<bit tf> {
bits<5> rd;
bits<5> rs;
bits<32> Inst;
let Inst{31-26} = 0;
let Inst{25-21} = rs;
let Inst{20-18} = 0; // cc
let Inst{17} = 0;
let Inst{16} = tf;
let Inst{15-11} = rd;
let Inst{10-6} = 0;
let Inst{5-0} = 1;
}
class CMov_F_F_FM<bits<5> fmt, bit tf> {
bits<5> fd;
bits<5> fs;
bits<32> Inst;
let Inst{31-26} = 0x11;
let Inst{25-21} = fmt;
let Inst{20-18} = 0; // cc
let Inst{17} = 0;
let Inst{16} = tf;
let Inst{15-11} = fs;
let Inst{10-6} = fd;
let Inst{5-0} = 0x11;
}