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vartype.h
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vartype.h
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
/*****************************************************************************/
#ifndef _VARTYPE_H_
#define _VARTYPE_H_
/*****************************************************************************/
#include "error.h"
enum var_types_classification
{
VTF_ANY = 0x0000,
VTF_INT = 0x0001,
VTF_UNS = 0x0002, // type is unsigned
VTF_FLT = 0x0004,
VTF_GCR = 0x0008, // type is GC ref
VTF_BYR = 0x0010, // type is Byref
VTF_I = 0x0020, // is machine sized
VTF_S = 0x0040, // is a struct type
VTF_VEC = 0x0080, // is a vector type
};
enum var_types_register
{
VTR_UNKNOWN = 0,
VTR_INT = 1,
VTR_FLOAT = 2,
VTR_MASK = 3,
};
#include "vartypesdef.h"
/*****************************************************************************
* C-style pointers are implemented as TYP_INT or TYP_LONG depending on the
* platform
*/
#ifdef TARGET_64BIT
#define TYP_I_IMPL TYP_LONG
#define TYP_U_IMPL TYP_ULONG
#else
#define TYP_I_IMPL TYP_INT
#define TYP_U_IMPL TYP_UINT
#ifdef _PREFAST_
// We silence this in the 32-bit build because for portability, we like to have asserts like this:
// assert(op2->gtType == TYP_INT || op2->gtType == TYP_I_IMPL);
// This is obviously redundant for 32-bit builds, but we don't want to have ifdefs and different
// asserts just for 64-bit builds, so for now just silence the assert
#pragma warning(disable : 6287) // warning 6287: the left and right sub-expressions are identical
#endif //_PREFAST_
#endif
/*****************************************************************************/
const extern BYTE varTypeClassification[TYP_COUNT];
const extern BYTE varTypeRegister[TYP_COUNT];
// make any class with a TypeGet member also have a function TypeGet() that does the same thing
template <class T>
inline var_types TypeGet(T* t)
{
return t->TypeGet();
}
// make a TypeGet function which is the identity function for var_types
// the point of this and the preceding template is now you can make template functions
// that work on var_types as well as any object that exposes a TypeGet method.
// such as all of these varTypeIs* functions
inline var_types TypeGet(var_types v)
{
return v;
}
template <class T>
inline bool varTypeIsSIMD(T vt)
{
#ifdef FEATURE_SIMD
return ((varTypeClassification[TypeGet(vt)] & VTF_VEC) != 0);
#else
// Always return false if FEATURE_SIMD is not enabled
return false;
#endif
}
template <class T>
inline bool varTypeIsMask(T vt)
{
#if defined(TARGET_XARCH) && defined(FEATURE_SIMD)
return (TypeGet(vt) == TYP_MASK);
#else // FEATURE_SIMD
return false;
#endif
}
template <class T>
inline bool varTypeIsIntegral(T vt)
{
return ((varTypeClassification[TypeGet(vt)] & (VTF_INT)) != 0);
}
template <class T>
inline bool varTypeIsIntegralOrI(T vt)
{
return ((varTypeClassification[TypeGet(vt)] & (VTF_INT | VTF_I)) != 0);
}
template <class T>
inline bool varTypeIsUnsigned(T vt)
{
return ((varTypeClassification[TypeGet(vt)] & (VTF_UNS)) != 0);
}
template <class T>
inline bool varTypeIsSigned(T vt)
{
return varTypeIsIntegralOrI(vt) && !varTypeIsUnsigned(vt);
}
// If "vt" represents an unsigned integral type, returns the corresponding signed integral type,
// otherwise returns the original type.
template <class T>
inline var_types varTypeToSigned(T vt)
{
var_types type = TypeGet(vt);
if (varTypeIsUnsigned(type))
{
switch (type)
{
case TYP_BOOL:
case TYP_UBYTE:
return TYP_BYTE;
case TYP_USHORT:
return TYP_SHORT;
case TYP_UINT:
return TYP_INT;
case TYP_ULONG:
return TYP_LONG;
default:
unreached();
}
}
return type;
}
// If "vt" represents a signed integral type, returns the corresponding unsigned integral type,
// otherwise returns the original type.
template <class T>
inline var_types varTypeToUnsigned(T vt)
{
// Force signed types into corresponding unsigned type.
var_types type = TypeGet(vt);
switch (type)
{
case TYP_BYTE:
return TYP_UBYTE;
case TYP_SHORT:
return TYP_USHORT;
case TYP_INT:
return TYP_UINT;
case TYP_LONG:
return TYP_ULONG;
default:
return type;
}
}
template <class T>
inline bool varTypeIsFloating(T vt)
{
return ((varTypeClassification[TypeGet(vt)] & (VTF_FLT)) != 0);
}
template <class T>
inline bool varTypeIsArithmetic(T vt)
{
return ((varTypeClassification[TypeGet(vt)] & (VTF_INT | VTF_FLT)) != 0);
}
template <class T>
inline unsigned varTypeGCtype(T vt)
{
return (unsigned)(varTypeClassification[TypeGet(vt)] & (VTF_GCR | VTF_BYR));
}
template <class T>
inline bool varTypeIsGC(T vt)
{
return (varTypeGCtype(vt) != 0);
}
template <class T>
inline bool varTypeIsI(T vt)
{
return ((varTypeClassification[TypeGet(vt)] & VTF_I) != 0);
}
template <class T>
inline bool varTypeIsEnregisterable(T vt)
{
return (TypeGet(vt) != TYP_STRUCT);
}
template <class T>
inline bool varTypeIsByte(T vt)
{
return (TypeGet(vt) >= TYP_BOOL) && (TypeGet(vt) <= TYP_UBYTE);
}
template <class T>
inline bool varTypeIsShort(T vt)
{
return (TypeGet(vt) == TYP_SHORT) || (TypeGet(vt) == TYP_USHORT);
}
template <class T>
inline bool varTypeIsSmall(T vt)
{
return (TypeGet(vt) >= TYP_BOOL) && (TypeGet(vt) <= TYP_USHORT);
}
template <class T>
inline bool varTypeIsSmallInt(T vt)
{
return (TypeGet(vt) >= TYP_BYTE) && (TypeGet(vt) <= TYP_USHORT);
}
template <class T>
inline bool varTypeIsIntOrI(T vt)
{
return ((TypeGet(vt) == TYP_INT)
#ifdef TARGET_64BIT
|| (TypeGet(vt) == TYP_I_IMPL)
#endif // TARGET_64BIT
);
}
template <class T>
inline bool genActualTypeIsInt(T vt)
{
return ((TypeGet(vt) >= TYP_BOOL) && (TypeGet(vt) <= TYP_UINT));
}
template <class T>
inline bool genActualTypeIsIntOrI(T vt)
{
return ((TypeGet(vt) >= TYP_BOOL) && (TypeGet(vt) <= TYP_U_IMPL));
}
template <class T>
inline bool varTypeIsLong(T vt)
{
return (TypeGet(vt) >= TYP_LONG) && (TypeGet(vt) <= TYP_ULONG);
}
template <class T>
inline bool varTypeIsInt(T vt)
{
return (TypeGet(vt) >= TYP_INT) && (TypeGet(vt) <= TYP_UINT);
}
template <class T>
inline bool varTypeIsMultiReg(T vt)
{
#ifdef TARGET_64BIT
return false;
#else
return (TypeGet(vt) == TYP_LONG);
#endif
}
template <class T>
inline bool varTypeIsSingleReg(T vt)
{
return !varTypeIsMultiReg(vt);
}
template <class T>
inline bool varTypeIsComposite(T vt)
{
return (!varTypeIsArithmetic(TypeGet(vt)) && TypeGet(vt) != TYP_VOID);
}
// Is this type promotable?
// In general only structs are promotable.
// However, a SIMD type, e.g. TYP_SIMD may be handled as either a struct, OR a
// fully-promoted register type.
// On 32-bit systems longs are split into an upper and lower half, and they are
// handled as if they are structs with two integer fields.
template <class T>
inline bool varTypeIsPromotable(T vt)
{
#ifndef TARGET_64BIT
if (varTypeIsLong(vt))
{
return true;
}
#endif
return varTypeIsStruct(vt);
}
template <class T>
inline bool varTypeIsStruct(T vt)
{
return ((varTypeClassification[TypeGet(vt)] & VTF_S) != 0);
}
template <class T, class U>
inline bool varTypeUsesSameRegType(T vt, U vu)
{
return varTypeRegister[TypeGet(vt)] == varTypeRegister[TypeGet(vu)];
}
template <class T>
inline bool varTypeUsesIntReg(T vt)
{
return varTypeRegister[TypeGet(vt)] == VTR_INT;
}
template <class T>
inline bool varTypeUsesFloatReg(T vt)
{
return varTypeRegister[TypeGet(vt)] == VTR_FLOAT;
}
template <class T>
inline bool varTypeUsesMaskReg(T vt)
{
// The technically correct check is:
// return varTypeRegister[TypeGet(vt)] == VTR_MASK;
//
// However, we only have one type that uses VTR_MASK today
// and so its quite a bit cheaper to just check that directly
#if defined(FEATURE_SIMD) && defined(TARGET_XARCH)
assert((TypeGet(vt) == TYP_MASK) || (varTypeRegister[TypeGet(vt)] != VTR_MASK));
return TypeGet(vt) == TYP_MASK;
#else
assert(varTypeRegister[TypeGet(vt)] != VTR_MASK);
return false;
#endif
}
template <class T>
inline bool varTypeUsesFloatArgReg(T vt)
{
#ifdef TARGET_ARM64
// Arm64 passes SIMD types in floating point registers.
return varTypeUsesFloatReg(vt);
#else
// Other targets pass them as regular structs - by reference or by value.
return varTypeIsFloating(vt);
#endif
}
//------------------------------------------------------------------------
// varTypeIsValidHfaType: Determine if the type is a valid HFA type
//
// Arguments:
// vt - the type of interest
//
// Return Value:
// Returns true iff the type is a valid HFA type.
//
// Notes:
// This should only be called with the return value from GetHfaType().
// The only valid values are TYP_UNDEF, for which this returns false,
// TYP_FLOAT, TYP_DOUBLE, or (ARM64-only) TYP_SIMD*.
//
template <class T>
inline bool varTypeIsValidHfaType(T vt)
{
if (GlobalJitOptions::compFeatureHfa)
{
bool isValid = (TypeGet(vt) != TYP_UNDEF);
if (isValid)
{
#ifdef TARGET_ARM64
assert(varTypeUsesFloatReg(vt));
#else // !TARGET_ARM64
assert(varTypeIsFloating(vt));
#endif // !TARGET_ARM64
}
return isValid;
}
else
{
return false;
}
}
/*****************************************************************************/
#endif // _VARTYPE_H_
/*****************************************************************************/