symbols.h

cg编译器

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//
// symbols.h
//

#if !defined(__SYMBOLS_H)
#define __SYMBOLS_H 1

#include "memory.h"

#define MAX_ARRAY_DIMENSIONS 3

// Type propertes:

#define TYPE_BASE_MASK              0x0000000f
#define TYPE_BASE_SHIFT             0
#define TYPE_BASE_BITS              4
#define TYPE_BASE_NO_TYPE           0x00000000 // e.g. struct or connector
#define TYPE_BASE_UNDEFINED_TYPE    0x00000001
#define TYPE_BASE_CFLOAT            0x00000002
#define TYPE_BASE_CINT              0x00000003
#define TYPE_BASE_VOID              0x00000004
#define TYPE_BASE_FLOAT             0x00000005
#define TYPE_BASE_INT               0x00000006
#define TYPE_BASE_BOOLEAN           0x00000007
#define TYPE_BASE_FIRST_USER        0x00000008
#define TYPE_BASE_LAST_USER         0x0000000f

#define TYPE_CATEGORY_MASK          0x000000f0
#define TYPE_CATEGORY_SHIFT         4
#define TYPE_CATEGORY_NONE          0x00000000
#define TYPE_CATEGORY_SCALAR        0x00000010
#define TYPE_CATEGORY_ARRAY         0x00000020
#define TYPE_CATEGORY_FUNCTION      0x00000030
#define TYPE_CATEGORY_STRUCT        0x00000040
#define TYPE_CATEGORY_CONNECTOR     0x00000050

#define TYPE_DOMAIN_MASK            0x00000f00
#define TYPE_DOMAIN_SHIFT           8
#define TYPE_DOMAIN_UNKNOWN         0x00000000
#define TYPE_DOMAIN_UNIFORM         0x00000100
#define TYPE_DOMAIN_VARYING         0x00000200

#define TYPE_QUALIFIER_MASK         0x0000f000
#define TYPE_QUALIFIER_NONE         0x00000000
#define TYPE_QUALIFIER_CONST        0x00001000
#define TYPE_QUALIFIER_IN           0x00002000
#define TYPE_QUALIFIER_OUT          0x00004000
#define TYPE_QUALIFIER_INOUT        0x00006000

// ??? Should these be called "declarator bits"???
#define TYPE_MISC_MASK              0x0ff00000
#define TYPE_MISC_TYPEDEF           0x00100000
#define TYPE_MISC_PROGRAM           0x00200000    // Type is program function
#define TYPE_MISC_ABSTRACT_PARAMS   0x00400000    // Type is function declared with abstract parameters
#define TYPE_MISC_VOID              0x00800000    // Type is void
#define TYPE_MISC_INLINE            0x01000000    // "inline" function attribute
#define TYPE_MISC_INTERNAL          0x02000000    // "__internal" function attribute
#define TYPE_MISC_PACKED            0x04000000    // For vector types like float3
#define TYPE_MISC_PACKED_KW         0x08000000    // Actual "packed" keyword used
#define TYPE_MISC_MARKED            0x10000000    // Temp value for printing types, etc.

typedef enum symbolkind {
    VARIABLE_S, TYPEDEF_S, FUNCTION_S, CONSTANT_S, TAG_S, MACRO_S,
} symbolkind;

typedef enum StrorageClass {
    SC_UNKNOWN, SC_AUTO, SC_STATIC, SC_EXTERN,
} StorageClass;

#define SYMB_IS_PARAMETER           0x000001    // Symbol is a formal parameter
#define SYMB_IS_DEFINED             0x000002    // Symbol is defined.  Currently only used for functions.
#define SYMB_IS_BUILTIN             0x000004    // Symbol is a built-in function.
#define SYMB_IS_INLINE_FUNCTION     0x000008    // Symbol is a function that will be inlined.
#define SYMB_IS_CONNECTOR_REGISTER  0x000010    // Symbol is a connector hw register
#define SYMB_CONNECTOR_CAN_READ     0x000020    // Symbol is a readable connector hw register
#define SYMB_CONNECTOR_CAN_WRITE    0x000040    // Symbol is a writable connector hw register
#define SYMB_NEEDS_BINDING          0x000080    // Symbol is a non-static global and has not yet been bound

// Typedefs for things defined in "support.h":

union stmt_rec;

// Typedefs for things defined here in "symbols.h":

typedef struct Scope_Rec Scope;
typedef struct FunSymbol_Rec FunSymbol;
typedef struct Symbol_Rec Symbol;
typedef union Type_Rec Type;
typedef struct TypeCommon_Rec TypeCommon;
typedef struct TypeScalar_Rec TypeScalar;
typedef struct TypeArray_Rec TypeArray;
typedef struct TypeStruct_Rec TypeStruct;
typedef struct TypeFunction_Rec TypeFunction;

typedef struct SymbolList_Rec {
    struct SymbolList_Rec *next;
    Symbol *symb;
} SymbolList;

struct Scope_Rec {
    Scope *next, *prev;     // doubly-linked list of all scopes
    Scope *parent;
    Scope *funScope;        // Points to base scope of enclosing function
    MemoryPool *pool;       // pool used for allocation in this scope
    Symbol *symbols;
    Symbol *tags;
    Symbol *params;
    Type *returnType;
    int level;              // 0 = super globals, 1 = globals, etc.
    int funindex;           // Identifies which function contains scope
    int InFormalParameters; // > 0 when parsing formal parameters.
    int HasVoidParameter;
    int HasReturnStmt;
    int IsStructScope;
    int HasSemantics;       // Struct scope has members with semantics
    int pid;                // Program type id
    // Only used at global scope (level 1):
    SymbolList *programs;   // List of programs for this compilation.
    union stmt_rec *initStmts;        // Global initialization statements.
};

typedef struct TypeList_Rec {
    struct TypeList_Rec *next;
    Type *type;
} TypeList;

struct TypeCommon_Rec {
    int properties;
    int size;
};

struct TypeScalar_Rec {
    int properties;
    int size;
};

struct TypeArray_Rec {
    int properties;
    int size;
    Type *eltype;
    int numels;
};

struct TypeStruct_Rec { // for structs and connectors
    int properties;
    int size;
    Type *unqualifiedtype;
    Scope *members;
    SourceLoc loc;
    int tag;          // struct or connector tag
    int semantics;
    int variety;      // connector variety
    int HasSemantics; // set if any members have semantics
    char *allocated;  // set if corresponding register has been bound
    int csize;
    void *tempptr;    // temp for FP30 backend connectors: dagnode* to DOP_VARYING
};

struct TypeFunction_Rec {
    int properties;
    int size;
    Type *rettype;
    TypeList *paramtypes;
};

union Type_Rec {
    int properties;
    TypeCommon co;
    TypeScalar sc;
    TypeArray arr;
    TypeStruct str;
    TypeFunction fun;
};

// Symbol table is a simple binary tree.

struct FunSymbol_Rec {
    Scope *locals;
    Symbol *params;
    union stmt_rec *statements;
    Symbol *overload;   // List of overloaded versions of this function
    int flags;          // Used when resolving overloaded reference
    short group;        // Built-in function group
    short index;        // Built-in function index
    char HasOutParams;
};

typedef struct VarSymbol_Rec {
    int addr;           // Address or member offset
    int semantics;
    Binding *bind;
    union expr_rec *init;   // For initialized non-static globals
} VarSymbol;

typedef struct ConstSymbol_Rec {
    int value;          // Constant value: 0 = false, 1 = true
} ConstSymbol;

#include "cpp.h"        // to get MacroSymbol def

struct Symbol_Rec {
    Symbol *left, *right;
    Symbol *next;
    int name;       // Name atom
    Type *type;     // Type descriptor
    SourceLoc loc;
    symbolkind kind;
    int properties; // Symbol properties
    StorageClass storageClass;
    int flags;      // Temp for various semantic uses
    void *tempptr;  // DAG rewrite temp: expr*, for SSA expr. that writes this sym
    void *tempptr2; // DAG rewrite temp: dagnode* to DOP_UNIFORM, for input var
    union {
        FunSymbol fun;
        VarSymbol var;
        ConstSymbol con;
        MacroSymbol mac;
    } details;
};

extern Scope *CurrentScope;
extern Scope *GlobalScope;
extern Scope *ScopeList;
extern int NextFunctionIndex;

extern Type *UndefinedType;
extern Type *CFloatType;
extern Type *CIntType;
extern Type *IntType;
extern Type *FloatType;
extern Type *VoidType;
extern Type *BooleanType;

extern Type *Float2Type;
extern Type *Float3Type;
extern Type *Float4Type;

extern Type *CFloat2Type;
extern Type *CFloat3Type;
extern Type *CFloat4Type;

extern Type *CInt2Type;
extern Type *CInt3Type;
extern Type *CInt4Type;

extern Type *Float2Type;
extern Type *Float3Type;
extern Type *Float4Type;

extern Type *Int2Type;
extern Type *Int3Type;
extern Type *Int4Type;

extern Type *Boolean2Type;
extern Type *Boolean3Type;
extern Type *Boolean4Type;

void SetScalarTypeName(int base, int name, Type *fType);

int InitSymbolTable(CgStruct *Cg);
int StartGlobalScope(CgStruct *Cg);
int FreeSymbolTable(CgStruct *Cg);
Scope *NewScopeInPool(MemoryPool *);
#define NewScope()      NewScopeInPool(CurrentScope->pool)
void PushScope(Scope *fScope);
Scope *PopScope(void);
Symbol *NewSymbol(SourceLoc *loc, Scope *fScope, int name, Type *fType, symbolkind kind);
Symbol *AddSymbol(SourceLoc *loc, Scope *fScope, int atom, Type *fType, symbolkind kind);
Symbol *UniqueSymbol(Scope *fScope, Type *fType, symbolkind kind);
Symbol *AddTag(SourceLoc *loc, Scope *fScope, int atom, int category);
Symbol *LookUpLocalSymbol(Scope *fScope, int atom);
Symbol *LookUpLocalSymbolBySemanticName(Scope *fScope, int atom);
Symbol *LookUpLocalSymbolByBindingName(Scope *fScope, int atom);
Symbol *LookUpLocalTag(Scope *fScope, int atom);
Symbol *LookUpSymbol(Scope *fScope, int atom);
Symbol *LookUpTag(Scope *fScope, int atom);
Type *LookUpTypeSymbol(Scope *fScope, int atom);

void InitType(Type *fType);

Type *NewType(int properties, int size);
Type *DupType(Type *fType);
Type *NewPackedArrayType(Type *elType, int numels, int properties);

int IsCategory(const Type *fType, int category);
int IsTypeBase(const Type *fType, int base);
int IsVoid(const Type *fType);
int IsBoolean(const Type *fType);
int IsArray(const Type *fType);
int IsScalar(const Type *fType);
int IsVector(const Type *fType, int *len);
int IsMatrix(const Type *fType, int *len, int *len2);
int IsUnsizedArray(const Type *fType);
int IsStruct(const Type *fType);
int IsProgram(const Type *fType);
int IsPacked(const Type *fType);
int IsSameUnqualifiedType(const Type *aType, const Type *bType);
int IsTypedef(const Symbol *fSymb);
int IsFunction(const Symbol *fSymb);
int IsInline(const Symbol *fSymb);
int GetBase(const Type *fType);
int GetCategory(const Type *fType);
int GetDomain(const Type *fType);
int GetQualifiers(const Type *fType);
int GetQuadRegSize(const Type *fType);
void ClearTypeMisc(Type *fType, int misc);

Type *GetStandardType(int tbase, int tlen, int tlen2);
Type *GetElementType(const Type *fType);

void SetStructMemberOffsets(Type *fType);
Type *SetStructMembers(SourceLoc *loc, Type *fType, Scope *members);

void AddParameter(Scope *fScope, Symbol *param);

int GetSwizzleOrWriteMask(SourceLoc *loc, int atom, int *FIsLValue, int *flen);
int GetMatrixSwizzleOrWriteMask(SourceLoc *loc, int atom, int *FIsLValue, int *flen);
const char *GetBaseTypeNameString(int base);

void ClearAllSymbolTempptr(void);
void ClearAllSymbolTempptr2(void);

#endif // !defined(__SYMBOLS_H)