-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
+namespace factor {
-inline static cell align(cell a, cell b)
-{
- return (a + (b-1)) & ~(b-1);
-}
+typedef intptr_t fixnum;
+typedef uintptr_t cell;
+
+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)
+// Must match leaf-stack-frame-size in basis/bootstrap/layouts.factor
+#define LEAF_FRAME_SIZE 16
+
+#define WORD_SIZE (signed)(sizeof(cell) * 8)
-#define TAG_MASK 7
-#define TAG_BITS 3
+#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 BIGNUM_TYPE 1
-#define ARRAY_TYPE 2
-#define FLOAT_TYPE 3
-#define QUOTATION_TYPE 4
-#define F_TYPE 5
-#define OBJECT_TYPE 6
-#define TUPLE_TYPE 7
-
-#define HEADER_TYPE 8 /* anything less than this is a tag */
-
-#define GC_COLLECTED 5 /* can be anything other than FIXNUM_TYPE */
-
-/*** Header types ***/
-#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 ALIEN_TYPE 14
-
-#define TYPE_COUNT 15
-
-enum code_block_type
-{
- code_block_unoptimized,
- code_block_optimized,
- code_block_profiling,
- code_block_pic
+#define RETAG(x, tag) (UNTAG(x) | (tag))
+
+// Type tags, should be kept in sync with:
+// basis/bootstrap/layouts.factor
+enum type_tags {
+ FIXNUM_TYPE,
+ F_TYPE,
+ ARRAY_TYPE,
+ FLOAT_TYPE,
+ QUOTATION_TYPE,
+ BIGNUM_TYPE,
+ ALIEN_TYPE,
+ TUPLE_TYPE,
+ WRAPPER_TYPE,
+ BYTE_ARRAY_TYPE,
+ CALLSTACK_TYPE,
+ STRING_TYPE,
+ WORD_TYPE,
+ DLL_TYPE,
+
+ TYPE_COUNT
+};
+
+static inline const char* type_name(cell type) {
+ static const char* const type_names[]={
+ "fixnum",
+ "f",
+ "array",
+ "float",
+ "quotation",
+ "bignum",
+ "alien",
+ "tuple",
+ "wrapper",
+ "byte-array",
+ "callstack",
+ "string",
+ "word",
+ "dll",
+ };
+
+ if (type>=TYPE_COUNT) {
+ FACTOR_ASSERT(false);
+ return "";
+ }
+ return type_names[type];
+}
+
+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,
+// 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' */
+// What Factor calls 'f'
static const cell false_object = F_TYPE;
-inline static bool immediate_p(cell obj)
-{
- return (obj == false_object || TAG(obj) == FIXNUM_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
- assert(TAG(tagged) == FIXNUM_TYPE);
-#endif
- return ((fixnum)tagged) >> TAG_BITS;
+inline static fixnum untag_fixnum(cell tagged) {
+ FACTOR_ASSERT(TAG(tagged) == FIXNUM_TYPE);
+ return ((fixnum)tagged) >> TAG_BITS;
}
-inline static cell tag_fixnum(fixnum untagged)
-{
- return RETAG(untagged << TAG_BITS,FIXNUM_TYPE);
+inline static cell tag_fixnum(fixnum untagged) {
+ return ( (cell)untagged << TAG_BITS) | FIXNUM_TYPE;
}
-inline static cell tag_for(cell type)
-{
- return type < HEADER_TYPE ? type : OBJECT_TYPE;
-}
+#define NO_TYPE_CHECK static const cell type_number = TYPE_COUNT
-struct object;
+struct object {
+ NO_TYPE_CHECK;
+ // header format (bits indexed with least significant as zero):
+ // bit 0 : free?
+ // bit 1 : forwarding pointer?
+ // if not forwarding:
+ // bit 2-5 : tag
+ // bit 7-end : hashcode
+ // if forwarding:
+ // bit 2-end : forwarding pointer
+ cell header;
-struct header {
- cell value;
+ template <typename Fixup> cell base_size(Fixup fixup) const;
+ template <typename Fixup> cell size(Fixup fixup) const;
+ cell size() const;
- /* Default ctor to make gcc 3.x happy */
- explicit header() { abort(); }
+ cell slot_count() const;
+ template <typename Fixup> cell slot_count(Fixup fixup) const;
- explicit header(cell value_) : value(value_ << TAG_BITS) {}
+ cell* slots() const { return (cell*)this; }
- void check_header() const
- {
-#ifdef FACTOR_DEBUG
- assert(TAG(value) == FIXNUM_TYPE && untag_fixnum(value) < TYPE_COUNT);
-#endif
- }
-
- cell hi_tag() const
- {
- check_header();
- return value >> TAG_BITS;
- }
-
- bool forwarding_pointer_p() const
- {
- return TAG(value) == GC_COLLECTED;
- }
-
- object *forwarding_pointer() const
- {
- return (object *)UNTAG(value);
- }
-
- void forward_to(object *pointer)
- {
- value = RETAG(pointer,GC_COLLECTED);
- }
-};
+ template <typename Iterator> void each_slot(Iterator& iter);
-#define NO_TYPE_CHECK static const cell type_number = TYPE_COUNT
+ // 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; }
-struct object {
- NO_TYPE_CHECK;
- header h;
+ cell type() const { return (header >> 2) & TAG_MASK; }
- cell size() const;
- cell binary_payload_start() const;
+ void initialize(cell type) { header = type << 2; }
- cell *slots() const { return (cell *)this; }
+ cell hashcode() const { return (header >> 6); }
- /* Only valid for objects in tenured space; must fast to free_heap_block
- to do anything with it if its free */
- bool free_p() const
- {
- return h.value & 1 == 1;
- }
+ 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 */
+// 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;
+ static const cell type_number = ARRAY_TYPE;
+ static const cell element_size = sizeof(cell);
+ // tagged
+ cell capacity;
- cell *data() const { return (cell *)(this + 1); }
+ cell* data() const { return (cell*)(this + 1); }
};
-/* These are really just arrays, but certain elements have special
-significance */
+// 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;
+ 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;
+ static const cell type_number = BIGNUM_TYPE;
+ static const cell element_size = sizeof(cell);
+ // tagged
+ cell capacity;
- cell *data() const { return (cell *)(this + 1); }
+ 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;
+ static const cell type_number = BYTE_ARRAY_TYPE;
+ static const cell element_size = 1;
+ // tagged
+ cell capacity;
#ifndef FACTOR_64
- cell padding0;
- cell padding1;
+ cell padding0;
+ cell padding1;
#endif
- template<typename Scalar> Scalar *data() const { return (Scalar *)(this + 1); }
+ template <typename Scalar> Scalar* data() const {
+ return (Scalar*)(this + 1);
+ }
};
-/* Assembly code makes assumptions about the layout of this struct */
+// 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); }
-
- cell nth(cell i) const;
+ static const cell type_number = STRING_TYPE;
+ // tagged num of chars
+ cell length;
+ // tagged
+ cell aux;
+ // tagged
+ cell hashcode;
+
+ uint8_t* data() const { return (uint8_t*)(this + 1); }
};
-/* The compiled code heap is structured into blocks. */
-struct code_block
-{
- cell header;
- cell owner; /* tagged pointer to word, quotation or f */
- cell literals; /* tagged pointer to array or f */
- cell relocation; /* tagged pointer to byte-array or f */
-
- bool free_p() const
- {
- return header & 1 == 1;
- }
-
- code_block_type type() const
- {
- return (code_block_type)((header >> 1) & 0x3);
- }
-
- void set_type(code_block_type type)
- {
- header = ((header & ~0x7) | (type << 1));
- }
-
- bool pic_p() const
- {
- return type() == code_block_pic;
- }
-
- bool optimized_p() const
- {
- return type() == code_block_optimized;
- }
-
- cell size() const
- {
- return header >> 3;
- }
-
- void *xt() const
- {
- return (void *)(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
-/* Assembly code makes assumptions about the layout of this struct */
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 call count for profiling */
- cell counter;
- /* TAGGED machine code for sub-primitive */
- cell subprimitive;
- /* UNTAGGED execution token: jump here to execute word */
- void *xt;
- /* UNTAGGED compiled code block */
- code_block *code;
- /* UNTAGGED profiler stub */
- code_block *profiling;
+ 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
+ cell 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 */
+// Assembly code makes assumptions about the layout of this struct
struct wrapper : public object {
- static const cell type_number = WRAPPER_TYPE;
- cell object;
+ static const cell type_number = WRAPPER_TYPE;
+ cell object;
};
-/* Assembly code makes assumptions about the layout of this struct */
+// Assembly code makes assumptions about the layout of this struct
struct boxed_float : object {
- static const cell type_number = FLOAT_TYPE;
+ static const cell type_number = FLOAT_TYPE;
#ifndef FACTOR_64
- cell padding;
+ cell padding;
#endif
- double n;
+ double n;
};
-/* Assembly code makes assumptions about the layout of this struct */
+// 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 */
- void *xt;
- /* UNTAGGED compiled code block */
- code_block *code;
+ 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
+ cell entry_point;
+
+ // defined in code_blocks.hpp
+ code_block* code() const;
};
-/* Assembly code makes assumptions about the layout of this struct */
+// 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;
+ 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 *dll;
-};
-
-struct stack_frame
-{
- void *xt;
- /* Frame size in bytes */
- cell size;
+ 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;
-
- stack_frame *frame_at(cell offset) const
- {
- return (stack_frame *)((char *)(this + 1) + offset);
- }
-
- stack_frame *top() const { return (stack_frame *)(this + 1); }
- stack_frame *bottom() const { return (stack_frame *)((cell)(this + 1) + untag_fixnum(length)); }
+ static const cell type_number = CALLSTACK_TYPE;
+ // tagged
+ cell length;
+
+ cell frame_top_at(cell offset) const {
+ return (cell)(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;
+ static const cell type_number = TUPLE_TYPE;
+ // tagged layout
+ cell layout;
- cell *data() const { return (cell *)(this + 1); }
+ cell* data() const { return (cell*)(this + 1); }
};
+inline static cell tuple_capacity(const tuple_layout *layout) {
+ return untag_fixnum(layout->size);
+}
+
+inline static cell tuple_size(const tuple_layout* layout) {
+ return sizeof(tuple) + tuple_capacity(layout) * sizeof(cell);
+}
+
+inline static cell string_capacity(const string* str) {
+ return untag_fixnum(str->length);
+}
+
+inline static cell string_size(cell size) { return sizeof(string) + size; }
+
}
projects / factor.git / blobdiff