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//===- CodeGen/ValueTypes.h - Low-Level Target independ. types --*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the set of low-level target independent types which various
// values in the code generator are.  This allows the target specific behavior
// of instructions to be described to target independent passes.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_VALUETYPES_H
#define LLVM_CODEGEN_VALUETYPES_H

#include <cassert>

namespace llvm {
  class Type;

/// MVT namespace - This namespace defines the ValueType enum, which contains
/// the various low-level value types.
///
namespace MVT {  // MVT = Machine Value Types
  enum ValueType {
    // If you change this numbering, you must change the values in Target.td as
    // well!
    Other          =   0,   // This is a non-standard value
    i1             =   1,   // This is a 1 bit integer value
    i8             =   2,   // This is an 8 bit integer value
    i16            =   3,   // This is a 16 bit integer value
    i32            =   4,   // This is a 32 bit integer value
    i64            =   5,   // This is a 64 bit integer value
    i128           =   6,   // This is a 128 bit integer value

    f32             =  7,   // This is a 32 bit floating point value
    f64             =  8,   // This is a 64 bit floating point value
    f80             =  9,   // This is a 80 bit floating point value
    f128            = 10,   // This is a 128 bit floating point value
    Flag           =  11,   // This is a condition code or machine flag.

    isVoid          = 12,   // This has no value

    LAST_VALUETYPE,         // This always remains at the end of the list.
  };

  static inline bool isInteger(ValueType VT) {
    return VT >= i1 && VT <= i128;
  }
  static inline bool isFloatingPoint(ValueType VT) {
    return VT >= f32 && VT <= f128;
  }

  static inline unsigned getSizeInBits(ValueType VT) {
    switch (VT) {
    default: assert(0 && "ValueType has no known size!");
    case MVT::i1  : return 1;
    case MVT::i8  : return 8;
    case MVT::i16 : return 16;
    case MVT::f32 :
    case MVT::i32 : return 32;
    case MVT::f64 :
    case MVT::i64 : return 64;
    case MVT::f80 : return 80;
    case MVT::f128:
    case MVT::i128: return 128;
    }
  }

  /// MVT::getValueTypeString - This function returns value type as a string,
  /// e.g. "i32".
  const char *getValueTypeString(ValueType VT);

  /// MVT::getTypeForValueType - This method returns an LLVM type corresponding
  /// to the specified ValueType.  For integer types, this returns an unsigned
  /// type.  Note that this will abort for types that cannot be represented.
  const Type *getTypeForValueType(ValueType VT);
};

} // End llvm namespace

#endif