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ty.d
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ty.d
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/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (C) 1983-1998 by Symantec
* Copyright (C) 1999-2018 by The D Language Foundation, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/backend/ty.d, backend/_ty.d)
*/
module dmd.backend.ty;
// Online documentation: https://dlang.org/phobos/dmd_backend_ty.html
extern (C++):
@nogc:
nothrow:
alias tym_t = uint;
/*****************************************
* Data types.
* (consists of basic type + modifier bits)
*/
// Basic types.
// casttab[][] in exp2.c depends on the order of this
// typromo[] in cpp.c depends on the order too
enum
{
TYbool = 0,
TYchar = 1,
TYschar = 2, // signed char
TYuchar = 3, // unsigned char
TYchar8 = 4,
TYchar16 = 5,
TYshort = 6,
TYwchar_t = 7,
TYushort = 8, // unsigned short
TYenum = 9, // enumeration value
TYint = 0xA,
TYuint = 0xB, // unsigned
TYlong = 0xC,
TYulong = 0xD, // unsigned long
TYdchar = 0xE, // 32 bit Unicode char
TYllong = 0xF, // 64 bit long
TYullong = 0x10, // 64 bit unsigned long
TYfloat = 0x11, // 32 bit real
TYdouble = 0x12, // 64 bit real
// long double is mapped to either of the following at runtime:
TYdouble_alias = 0x13, // 64 bit real (but distinct for overload purposes)
TYldouble = 0x14, // 80 bit real
// Add imaginary and complex types for D and C99
TYifloat = 0x15,
TYidouble = 0x16,
TYildouble = 0x17,
TYcfloat = 0x18,
TYcdouble = 0x19,
TYcldouble = 0x1A,
TYnullptr = 0x1C,
TYnptr = 0x1D, // data segment relative pointer
TYref = 0x24, // reference to another type
TYvoid = 0x25,
TYstruct = 0x26, // watch tyaggregate()
TYarray = 0x27, // watch tyaggregate()
TYnfunc = 0x28, // near C func
TYnpfunc = 0x2A, // near Cpp func
TYnsfunc = 0x2C, // near stdcall func
TYifunc = 0x2E, // interrupt func
TYptr = 0x33, // generic pointer type
TYmfunc = 0x37, // NT C++ member func
TYjfunc = 0x38, // LINK.d D function
TYhfunc = 0x39, // C function with hidden parameter
TYnref = 0x3A, // near reference
TYcent = 0x3C, // 128 bit signed integer
TYucent = 0x3D, // 128 bit unsigned integer
// Used for segmented architectures
TYsptr = 0x1E, // stack segment relative pointer
TYcptr = 0x1F, // code segment relative pointer
TYf16ptr = 0x20, // special OS/2 far16 pointer
TYfptr = 0x21, // far pointer (has segment and offset)
TYhptr = 0x22, // huge pointer (has segment and offset)
TYvptr = 0x23, // __handle pointer (has segment and offset)
TYffunc = 0x29, // far C func
TYfpfunc = 0x2B, // far Cpp func
TYfsfunc = 0x2D, // far stdcall func
TYf16func = 0x34, // _far16 _pascal function
TYnsysfunc = 0x35, // near __syscall func
TYfsysfunc = 0x36, // far __syscall func
TYfref = 0x3B, // far reference
// Used for C++ compiler
TYmemptr = 0x2F, // pointer to member
TYident = 0x30, // type-argument
TYtemplate = 0x31, // unexpanded class template
TYvtshape = 0x32, // virtual function table
// SIMD 16 byte vector types // D type
TYfloat4 = 0x3E, // float[4]
TYdouble2 = 0x3F, // double[2]
TYschar16 = 0x40, // byte[16]
TYuchar16 = 0x41, // ubyte[16]
TYshort8 = 0x42, // short[8]
TYushort8 = 0x43, // ushort[8]
TYlong4 = 0x44, // int[4]
TYulong4 = 0x45, // uint[4]
TYllong2 = 0x46, // long[2]
TYullong2 = 0x47, // ulong[2]
// SIMD 32 byte vector types // D type
TYfloat8 = 0x48, // float[8]
TYdouble4 = 0x49, // double[4]
TYschar32 = 0x4A, // byte[32]
TYuchar32 = 0x4B, // ubyte[32]
TYshort16 = 0x4C, // short[16]
TYushort16 = 0x4D, // ushort[16]
TYlong8 = 0x4E, // int[8]
TYulong8 = 0x4F, // uint[8]
TYllong4 = 0x50, // long[4]
TYullong4 = 0x51, // ulong[4]
// SIMD 64 byte vector types // D type
TYfloat16 = 0x52, // float[16]
TYdouble8 = 0x53, // double[8]
TYschar64 = 0x54, // byte[64]
TYuchar64 = 0x55, // ubyte[64]
TYshort32 = 0x56, // short[32]
TYushort32 = 0x57, // ushort[32]
TYlong16 = 0x58, // int[16]
TYulong16 = 0x59, // uint[16]
TYllong8 = 0x5A, // long[8]
TYullong8 = 0x5B, // ulong[8]
TYMAX = 0x5C,
}
alias TYerror = TYint;
extern __gshared int TYaarray; // D type
// These change depending on memory model
extern __gshared int TYdelegate, TYdarray; // D types
extern __gshared int TYptrdiff, TYsize, TYsize_t;
enum
{
mTYbasic = 0xFF, // bit mask for basic types
// Linkage type
mTYnear = 0x0800,
mTYfar = 0x1000, // seg:offset style pointer
mTYcs = 0x2000, // in code segment
mTYthread = 0x4000,
// Used for symbols going in the __thread_data section for TLS variables for Mach-O 64bit
mTYthreadData = 0x5000,
mTYLINK = 0x7800, // all linkage bits
mTYloadds = 0x08000, // 16 bit Windows LOADDS attribute
mTYexport = 0x10000,
mTYweak = 0x00000,
mTYimport = 0x20000,
mTYnaked = 0x40000,
mTYMOD = 0x78000, // all modifier bits
// Modifiers to basic types
mTYarrayhandle = 0x0,
mTYconst = 0x100,
mTYvolatile = 0x200,
mTYrestrict = 0, // BUG: add for C99
mTYmutable = 0, // need to add support
mTYunaligned = 0, // non-zero for PowerPC
mTYimmutable = 0x00080000, // immutable data
mTYshared = 0x00100000, // shared data
mTYnothrow = 0x00200000, // nothrow function
// Used only by C/C++ compiler
//#if TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_OPENBSD || TARGET_DRAGONFLYBSD || TARGET_SOLARIS
mTYnoret = 0x01000000, // function has no return
mTYtransu = 0x01000000, // transparent union
//#else
mTYfar16 = 0x01000000,
//#endif
mTYstdcall = 0x02000000,
mTYfastcall = 0x04000000,
mTYinterrupt = 0x08000000,
mTYcdecl = 0x10000000,
mTYpascal = 0x20000000,
mTYsyscall = 0x40000000,
mTYjava = 0x80000000,
//#if TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_OPENBSD || TARGET_DRAGONFLYBSD || TARGET_SOLARIS
// mTYTFF = 0xFE000000,
//#else
mTYTFF = 0xFF000000,
//#endif
}
pure
tym_t tybasic(tym_t ty) { return ty & mTYbasic; }
/* Flags in tytab[] array */
extern __gshared uint[256] tytab;
enum
{
TYFLptr = 1,
TYFLreal = 2,
TYFLintegral = 4,
TYFLcomplex = 8,
TYFLimaginary = 0x10,
TYFLuns = 0x20,
TYFLmptr = 0x40,
TYFLfv = 0x80, // TYfptr || TYvptr
TYFLpascal = 0x200, // callee cleans up stack
TYFLrevparam = 0x400, // function parameters are reversed
TYFLnullptr = 0x800,
TYFLshort = 0x1000,
TYFLaggregate = 0x2000,
TYFLfunc = 0x4000,
TYFLref = 0x8000,
TYFLsimd = 0x20000, // SIMD vector type
TYFLfarfunc = 0x100, // __far functions (for segmented architectures)
TYFLxmmreg = 0x10000, // can be put in XMM register
}
/* Array to give the size in bytes of a type, -1 means error */
extern __gshared byte[256] _tysize;
extern __gshared byte[256] _tyalignsize;
// Give size of type
byte tysize(tym_t ty) { return _tysize[ty & 0xFF]; }
byte tyalignsize(tym_t ty) { return _tyalignsize[ty & 0xFF]; }
/* Groupings of types */
uint tyintegral(tym_t ty) { return tytab[ty & 0xFF] & TYFLintegral; }
uint tyarithmetic(tym_t ty) { return tytab[ty & 0xFF] & (TYFLintegral | TYFLreal | TYFLimaginary | TYFLcomplex); }
uint tyaggregate(tym_t ty) { return tytab[ty & 0xFF] & TYFLaggregate; }
uint tyscalar(tym_t ty) { return tytab[ty & 0xFF] & (TYFLintegral | TYFLreal | TYFLimaginary | TYFLcomplex | TYFLptr | TYFLmptr | TYFLnullptr | TYFLref); }
uint tyfloating(tym_t ty) { return tytab[ty & 0xFF] & (TYFLreal | TYFLimaginary | TYFLcomplex); }
uint tyimaginary(tym_t ty) { return tytab[ty & 0xFF] & TYFLimaginary; }
uint tycomplex(tym_t ty) { return tytab[ty & 0xFF] & TYFLcomplex; }
uint tyreal(tym_t ty) { return tytab[ty & 0xFF] & TYFLreal; }
// Fits into 64 bit register
bool ty64reg(tym_t ty) { return tytab[ty & 0xFF] & (TYFLintegral | TYFLptr | TYFLref) && tysize(ty) <= _tysize[TYnptr]; }
// Can go in XMM floating point register
uint tyxmmreg(tym_t ty) { return tytab[ty & 0xFF] & TYFLxmmreg; }
// Is a vector type
bool tyvector(tym_t ty) { return tybasic(ty) >= TYfloat4 && tybasic(ty) <= TYullong4; }
/* Types that are chars or shorts */
uint tyshort(tym_t ty) { return tytab[ty & 0xFF] & TYFLshort; }
/* Detect TYlong or TYulong */
bool tylong(tym_t ty) { return tybasic(ty) == TYlong || tybasic(ty) == TYulong; }
/* Use to detect a pointer type */
uint typtr(tym_t ty) { return tytab[ty & 0xFF] & TYFLptr; }
/* Use to detect a reference type */
uint tyref(tym_t ty) { return tytab[ty & 0xFF] & TYFLref; }
/* Use to detect a pointer type or a member pointer */
uint tymptr(tym_t ty) { return tytab[ty & 0xFF] & (TYFLptr | TYFLmptr); }
// Use to detect a nullptr type or a member pointer
uint tynullptr(tym_t ty) { return tytab[ty & 0xFF] & TYFLnullptr; }
/* Detect TYfptr or TYvptr */
uint tyfv(tym_t ty) { return tytab[ty & 0xFF] & TYFLfv; }
/* All data types that fit in exactly 8 bits */
bool tybyte(tym_t ty) { return tysize(ty) == 1; }
/* Types that fit into a single machine register */
bool tyreg(tym_t ty) { return tysize(ty) <= _tysize[TYnptr]; }
/* Detect function type */
uint tyfunc(tym_t ty) { return tytab[ty & 0xFF] & TYFLfunc; }
/* Detect function type where parameters are pushed left to right */
uint tyrevfunc(tym_t ty) { return tytab[ty & 0xFF] & TYFLrevparam; }
/* Detect uint types */
uint tyuns(tym_t ty) { return tytab[ty & 0xFF] & (TYFLuns | TYFLptr); }
/* Target dependent info */
alias TYoffset = TYuint; // offset to an address
/* Detect cpp function type (callee cleans up stack) */
uint typfunc(tym_t ty) { return tytab[ty & 0xFF] & TYFLpascal; }
/* Array to convert a type to its unsigned equivalent */
extern __gshared tym_t[256] tytouns;
tym_t touns(tym_t ty) { return tytouns[ty & 0xFF]; }
/* Determine if TYffunc or TYfpfunc (a far function) */
uint tyfarfunc(tym_t ty) { return tytab[ty & 0xFF] & TYFLfarfunc; }
// Determine if parameter is a SIMD vector type
uint tysimd(tym_t ty) { return tytab[ty & 0xFF] & TYFLsimd; }
/* Determine relaxed type */
extern __gshared ubyte[TYMAX] _tyrelax;
uint tyrelax(tym_t ty) { return _tyrelax[tybasic(ty)]; }
/* Determine functionally equivalent type */
extern __gshared ubyte[TYMAX] tyequiv;
/* Give an ascii string for a type */
extern (C) { extern __gshared const(char)*[TYMAX] tystring; }
/* Debugger value for type */
extern __gshared ubyte[TYMAX] dttab;
extern __gshared ushort[TYMAX] dttab4;
bool I16() { return _tysize[TYnptr] == 2; }
bool I32() { return _tysize[TYnptr] == 4; }
bool I64() { return _tysize[TYnptr] == 8; }