4 typedef unsigned char u8;
5 typedef unsigned short u16;
6 typedef unsigned int u32;
7 typedef unsigned long long u64;
8 typedef signed char s8;
9 typedef signed short s16;
10 typedef signed int s32;
11 typedef signed long long s64;
14 typedef long long fixnum;
15 typedef unsigned long long cell;
18 typedef unsigned long cell;
21 inline static cell align(cell a, cell b)
23 return (a + (b-1)) & ~(b-1);
26 inline static cell align8(cell a)
31 #define WORD_SIZE (signed)(sizeof(cell)*8)
35 #define TAG(x) ((cell)(x) & TAG_MASK)
36 #define UNTAG(x) ((cell)(x) & ~TAG_MASK)
37 #define RETAG(x,tag) (UNTAG(x) | (tag))
44 #define QUOTATION_TYPE 4
49 /* Canonical F object */
52 #define HEADER_TYPE 8 /* anything less than this is a tag */
54 #define GC_COLLECTED 5 /* can be anything other than FIXNUM_TYPE */
56 /*** Header types ***/
57 #define WRAPPER_TYPE 8
58 #define BYTE_ARRAY_TYPE 9
59 #define CALLSTACK_TYPE 10
60 #define STRING_TYPE 11
67 /* Not real types, but code_block's type can be set to this */
69 #define FREE_BLOCK_TYPE 17
71 /* Constants used when floating-point trap exceptions are thrown */
74 FP_TRAP_INVALID_OPERATION = 1 << 0,
75 FP_TRAP_OVERFLOW = 1 << 1,
76 FP_TRAP_UNDERFLOW = 1 << 2,
77 FP_TRAP_ZERO_DIVIDE = 1 << 3,
78 FP_TRAP_INEXACT = 1 << 4,
81 inline static bool immediate_p(cell obj)
83 return (obj == F || TAG(obj) == FIXNUM_TYPE);
86 inline static fixnum untag_fixnum(cell tagged)
89 assert(TAG(tagged) == FIXNUM_TYPE);
91 return ((fixnum)tagged) >> TAG_BITS;
94 inline static cell tag_fixnum(fixnum untagged)
96 return RETAG(untagged << TAG_BITS,FIXNUM_TYPE);
99 inline static cell tag_for(cell type)
101 return type < HEADER_TYPE ? type : OBJECT_TYPE;
109 /* Default ctor to make gcc 3.x happy */
110 explicit header() { abort(); }
112 explicit header(cell value_) : value(value_ << TAG_BITS) {}
114 void check_header() {
116 assert(TAG(value) == FIXNUM_TYPE && untag_fixnum(value) < TYPE_COUNT);
122 return value >> TAG_BITS;
125 bool forwarding_pointer_p() {
126 return TAG(value) == GC_COLLECTED;
129 object *forwarding_pointer() {
130 return (object *)UNTAG(value);
133 void forward_to(object *pointer) {
134 value = RETAG(pointer,GC_COLLECTED);
138 #define NO_TYPE_CHECK static const cell type_number = TYPE_COUNT
143 cell *slots() { return (cell *)this; }
146 /* Assembly code makes assumptions about the layout of this struct */
147 struct array : public object {
148 static const cell type_number = ARRAY_TYPE;
149 static const cell element_size = sizeof(cell);
153 cell *data() { return (cell *)(this + 1); }
156 /* These are really just arrays, but certain elements have special
158 struct tuple_layout : public array {
168 struct bignum : public object {
169 static const cell type_number = BIGNUM_TYPE;
170 static const cell element_size = sizeof(cell);
174 cell *data() { return (cell *)(this + 1); }
177 struct byte_array : public object {
178 static const cell type_number = BYTE_ARRAY_TYPE;
179 static const cell element_size = 1;
183 template<typename Scalar> Scalar *data() { return (Scalar *)(this + 1); }
186 /* Assembly code makes assumptions about the layout of this struct */
187 struct string : public object {
188 static const cell type_number = STRING_TYPE;
189 /* tagged num of chars */
196 u8 *data() { return (u8 *)(this + 1); }
199 /* The compiled code heap is structured into blocks. */
207 bool marked_p() { return header & 1; }
208 void set_marked_p(bool marked)
216 cell type() { return (header >> 1) & 0x1f; }
217 void set_type(cell type)
219 header = ((header & ~(0x1f << 1)) | (type << 1));
222 cell size() { return (header >> 6); }
223 void set_size(cell size)
225 header = (header & 0x2f) | (size << 6);
229 struct free_heap_block : public heap_block
231 free_heap_block *next_free;
234 struct code_block : public heap_block
236 cell owner; /* tagged pointer to word, quotation or f */
237 cell literals; /* tagged pointer to array or f */
238 cell relocation; /* tagged pointer to byte-array or f */
240 void *xt() { return (void *)(this + 1); }
243 /* Assembly code makes assumptions about the layout of this struct */
244 struct word : public object {
245 static const cell type_number = WORD_TYPE;
246 /* TAGGED hashcode */
248 /* TAGGED word name */
250 /* TAGGED word vocabulary */
252 /* TAGGED definition */
254 /* TAGGED property assoc for library code */
256 /* TAGGED alternative entry point for direct non-tail calls. Used for inline caching */
258 /* TAGGED alternative entry point for direct tail calls. Used for inline caching */
260 /* TAGGED call count for profiling */
262 /* TAGGED machine code for sub-primitive */
264 /* UNTAGGED execution token: jump here to execute word */
266 /* UNTAGGED compiled code block */
268 /* UNTAGGED profiler stub */
269 code_block *profiling;
272 /* Assembly code makes assumptions about the layout of this struct */
273 struct wrapper : public object {
274 static const cell type_number = WRAPPER_TYPE;
278 /* Assembly code makes assumptions about the layout of this struct */
279 struct boxed_float : object {
280 static const cell type_number = FLOAT_TYPE;
289 /* Assembly code makes assumptions about the layout of this struct */
290 struct quotation : public object {
291 static const cell type_number = QUOTATION_TYPE;
300 /* UNTAGGED compiled code block */
304 /* Assembly code makes assumptions about the layout of this struct */
305 struct alien : public object {
306 static const cell type_number = ALIEN_TYPE;
315 struct dll : public object {
316 static const cell type_number = DLL_TYPE;
317 /* tagged byte array holding a C string */
319 /* OS-specific handle */
326 /* Frame size in bytes */
330 struct callstack : public object {
331 static const cell type_number = CALLSTACK_TYPE;
335 stack_frame *frame_at(cell offset)
337 return (stack_frame *)((char *)(this + 1) + offset);
340 stack_frame *top() { return (stack_frame *)(this + 1); }
341 stack_frame *bottom() { return (stack_frame *)((cell)(this + 1) + untag_fixnum(length)); }
344 struct tuple : public object {
345 static const cell type_number = TUPLE_TYPE;
349 cell *data() { return (cell *)(this + 1); }