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//===- PIC16InstrFormats.td - PIC16 Instruction Formats-------*- tblgen -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Describe PIC16 instructions format
//
// All the possible PIC16 fields are:
//
// opcode - operation code.
// f - 7-bit register file address.
// d - 1-bit direction specifier
// k - 8/11 bit literals
// b - 3 bits bit num specifier
//
//===----------------------------------------------------------------------===//
// Generic PIC16 Format
// PIC16 Instructions are 14-bit wide.
// FIXME: Add Cooper Specific Formats if any.
class PIC16Inst<dag outs, dag ins, string asmstr, list<dag> pattern>
: Instruction {
field bits<14> Inst;
let Namespace = "PIC16";
dag OutOperandList = outs;
dag InOperandList = ins;
let AsmString = asmstr;
let Pattern = pattern;
}
//===----------------------------------------------------------------------===//
// Byte Oriented instruction class in PIC16 : <|opcode|d|f|>
// opcode = 6 bits.
// d = direction = 1 bit.
// f = file register address = 7 bits.
//===----------------------------------------------------------------------===//
class ByteFormat<bits<6> opcode, dag outs, dag ins, string asmstr,
list<dag> pattern>
:PIC16Inst<outs, ins, asmstr, pattern> {
bits<1> d;
bits<7> f;
let Inst{13-8} = opcode;
let Inst{7} = d;
let Inst{6-0} = f;
}
//===----------------------------------------------------------------------===//
// Bit Oriented instruction class in PIC16 : <|opcode|b|f|>
// opcode = 4 bits.
// b = bit specifier = 3 bits.
// f = file register address = 7 bits.
//===----------------------------------------------------------------------===//
class BitFormat<bits<4> opcode, dag outs, dag ins, string asmstr,
list<dag> pattern>
: PIC16Inst<outs, ins, asmstr, pattern> {
bits<3> b;
bits<7> f;
let Inst{13-10} = opcode;
let Inst{9-7} = b;
let Inst{6-0} = f;
}
//===----------------------------------------------------------------------===//
// Literal Format instruction class in PIC16 : <|opcode|k|>
// opcode = 6 bits
// k = literal = 8 bits
//===----------------------------------------------------------------------===//
class LiteralFormat<bits<6> opcode, dag outs, dag ins, string asmstr,
list<dag> pattern>
: PIC16Inst<outs, ins, asmstr, pattern> {
bits<8> k;
let Inst{13-8} = opcode;
let Inst{7-0} = k;
}
//===----------------------------------------------------------------------===//
// Control Format instruction class in PIC16 : <|opcode|k|>
// opcode = 3 bits.
// k = jump address = 11 bits.
//===----------------------------------------------------------------------===//
class ControlFormat<bits<3> opcode, dag outs, dag ins, string asmstr,
list<dag> pattern>
: PIC16Inst<outs, ins, asmstr, pattern> {
bits<11> k;
let Inst{13-11} = opcode;
let Inst{10-0} = k;
}
//===----------------------------------------------------------------------===//
// Pseudo instruction class in PIC16
//===----------------------------------------------------------------------===//
class Pseudo<dag outs, dag ins, string asmstr, list<dag> pattern>
: PIC16Inst<outs, ins, asmstr, pattern> {
let Inst{13-6} = 0;
}
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