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namespace factor
{
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
typedef unsigned long long u64;
typedef signed char s8;
typedef signed short s16;
typedef signed int s32;
typedef signed long long s64;
#ifdef _WIN64
typedef long long fixnum;
typedef unsigned long long cell;
#else
typedef long fixnum;
typedef unsigned long cell;
#endif
inline static cell align(cell a, cell b)
{
return (a + (b-1)) & ~(b-1);
}
inline static cell alignment_for(cell a, cell b)
{
return align(a,b) - a;
}
static const cell data_alignment = 16;
#define WORD_SIZE (signed)(sizeof(cell)*8)
#define TAG_MASK 15
#define TAG_BITS 4
#define TAG(x) ((cell)(x) & TAG_MASK)
#define UNTAG(x) ((cell)(x) & ~TAG_MASK)
#define RETAG(x,tag) (UNTAG(x) | (tag))
/*** Tags ***/
#define FIXNUM_TYPE 0
#define F_TYPE 1
#define ARRAY_TYPE 2
#define FLOAT_TYPE 3
#define QUOTATION_TYPE 4
#define BIGNUM_TYPE 5
#define ALIEN_TYPE 6
#define TUPLE_TYPE 7
#define WRAPPER_TYPE 8
#define BYTE_ARRAY_TYPE 9
#define CALLSTACK_TYPE 10
#define STRING_TYPE 11
#define WORD_TYPE 12
#define DLL_TYPE 13
#define TYPE_COUNT 14
static inline const char *type_name(cell type)
{
switch (type)
{
case FIXNUM_TYPE:
return "fixnum";
case F_TYPE:
return "f";
case ARRAY_TYPE:
return "array";
case FLOAT_TYPE:
return "float";
case QUOTATION_TYPE:
return "quotation";
case BIGNUM_TYPE:
return "bignum";
case ALIEN_TYPE:
return "alien";
case TUPLE_TYPE:
return "tuple";
case WRAPPER_TYPE:
return "wrapper";
case BYTE_ARRAY_TYPE:
return "byte-array";
case CALLSTACK_TYPE:
return "callstack";
case STRING_TYPE:
return "string";
case WORD_TYPE:
return "word";
case DLL_TYPE:
return "dll";
default:
FACTOR_ASSERT(false);
return "";
}
}
enum code_block_type
{
code_block_unoptimized,
code_block_optimized,
code_block_pic
};
/* Constants used when floating-point trap exceptions are thrown */
enum
{
FP_TRAP_INVALID_OPERATION = 1 << 0,
FP_TRAP_OVERFLOW = 1 << 1,
FP_TRAP_UNDERFLOW = 1 << 2,
FP_TRAP_ZERO_DIVIDE = 1 << 3,
FP_TRAP_INEXACT = 1 << 4,
};
/* What Factor calls 'f' */
static const cell false_object = F_TYPE;
inline static bool immediate_p(cell obj)
{
/* We assume that fixnums have tag 0 and false_object has tag 1 */
return TAG(obj) <= F_TYPE;
}
inline static fixnum untag_fixnum(cell tagged)
{
#ifdef FACTOR_DEBUG
FACTOR_ASSERT(TAG(tagged) == FIXNUM_TYPE);
#endif
return ((fixnum)tagged) >> TAG_BITS;
}
inline static cell tag_fixnum(fixnum untagged)
{
return RETAG(untagged << TAG_BITS,FIXNUM_TYPE);
}
#define NO_TYPE_CHECK static const cell type_number = TYPE_COUNT
struct object {
NO_TYPE_CHECK;
cell header;
cell size() const;
template<typename Fixup> cell size(Fixup fixup) const;
cell binary_payload_start() const;
template<typename Fixup> cell binary_payload_start(Fixup fixup) const;
cell *slots() const { return (cell *)this; }
template<typename Iterator> void each_slot(Iterator &iter);
/* Only valid for objects in tenured space; must cast to free_heap_block
to do anything with it if its free */
bool free_p() const
{
return (header & 1) == 1;
}
cell type() const
{
return (header >> 2) & TAG_MASK;
}
void initialize(cell type)
{
header = type << 2;
}
cell hashcode() const
{
return (header >> 6);
}
void set_hashcode(cell hashcode)
{
header = (header & 0x3f) | (hashcode << 6);
}
bool forwarding_pointer_p() const
{
return (header & 2) == 2;
}
object *forwarding_pointer() const
{
return (object *)UNTAG(header);
}
void forward_to(object *pointer)
{
header = ((cell)pointer | 2);
}
};
/* Assembly code makes assumptions about the layout of this struct */
struct array : public object {
static const cell type_number = ARRAY_TYPE;
static const cell element_size = sizeof(cell);
/* tagged */
cell capacity;
cell *data() const { return (cell *)(this + 1); }
};
/* These are really just arrays, but certain elements have special
significance */
struct tuple_layout : public array {
NO_TYPE_CHECK;
/* tagged */
cell klass;
/* tagged fixnum */
cell size;
/* tagged fixnum */
cell echelon;
};
struct bignum : public object {
static const cell type_number = BIGNUM_TYPE;
static const cell element_size = sizeof(cell);
/* tagged */
cell capacity;
cell *data() const { return (cell *)(this + 1); }
};
struct byte_array : public object {
static const cell type_number = BYTE_ARRAY_TYPE;
static const cell element_size = 1;
/* tagged */
cell capacity;
#ifndef FACTOR_64
cell padding0;
cell padding1;
#endif
template<typename Scalar> Scalar *data() const { return (Scalar *)(this + 1); }
};
/* Assembly code makes assumptions about the layout of this struct */
struct string : public object {
static const cell type_number = STRING_TYPE;
/* tagged num of chars */
cell length;
/* tagged */
cell aux;
/* tagged */
cell hashcode;
u8 *data() const { return (u8 *)(this + 1); }
};
struct code_block;
/* Assembly code makes assumptions about the layout of this struct:
basis/bootstrap/images/images.factor
basis/compiler/constants/constants.factor
core/bootstrap/primitives.factor
*/
struct word : public object {
static const cell type_number = WORD_TYPE;
/* TAGGED hashcode */
cell hashcode;
/* TAGGED word name */
cell name;
/* TAGGED word vocabulary */
cell vocabulary;
/* TAGGED definition */
cell def;
/* TAGGED property assoc for library code */
cell props;
/* TAGGED alternative entry point for direct non-tail calls. Used for inline caching */
cell pic_def;
/* TAGGED alternative entry point for direct tail calls. Used for inline caching */
cell pic_tail_def;
/* TAGGED machine code for sub-primitive */
cell subprimitive;
/* UNTAGGED entry point: jump here to execute word */
void *entry_point;
/* UNTAGGED compiled code block */
/* defined in code_blocks.hpp */
code_block *code() const;
};
/* Assembly code makes assumptions about the layout of this struct */
struct wrapper : public object {
static const cell type_number = WRAPPER_TYPE;
cell object;
};
/* Assembly code makes assumptions about the layout of this struct */
struct boxed_float : object {
static const cell type_number = FLOAT_TYPE;
#ifndef FACTOR_64
cell padding;
#endif
double n;
};
/* Assembly code makes assumptions about the layout of this struct:
basis/bootstrap/images/images.factor
basis/compiler/constants/constants.factor
core/bootstrap/primitives.factor
*/
struct quotation : public object {
static const cell type_number = QUOTATION_TYPE;
/* tagged */
cell array;
/* tagged */
cell cached_effect;
/* tagged */
cell cache_counter;
/* UNTAGGED entry point; jump here to call quotation */
void *entry_point;
/* defined in code_blocks.hpp */
code_block *code() const;
};
/* Assembly code makes assumptions about the layout of this struct */
struct alien : public object {
static const cell type_number = ALIEN_TYPE;
/* tagged */
cell base;
/* tagged */
cell expired;
/* untagged */
cell displacement;
/* untagged */
cell address;
void update_address()
{
if(base == false_object)
address = displacement;
else
address = UNTAG(base) + sizeof(byte_array) + displacement;
}
};
struct dll : public object {
static const cell type_number = DLL_TYPE;
/* tagged byte array holding a C string */
cell path;
/* OS-specific handle */
void *handle;
};
struct callstack : public object {
static const cell type_number = CALLSTACK_TYPE;
/* tagged */
cell length;
void *frame_top_at(cell offset) const
{
return (void *)((char *)(this + 1) + offset);
}
void *top() const { return (void *)(this + 1); }
void *bottom() const { return (void *)((cell)(this + 1) + untag_fixnum(length)); }
};
struct tuple : public object {
static const cell type_number = TUPLE_TYPE;
/* tagged layout */
cell layout;
cell *data() const { return (cell *)(this + 1); }
};
struct data_root_range {
cell *start;
cell len;
explicit data_root_range(cell *start_, cell len_) :
start(start_), len(len_) {}
};
}
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