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#include "value.h"
#include "gc.h"
#include "util.h"
#include <inttypes.h>
static const intptr_t FIXNUM_MIN = -((intptr_t)1 << (4 * sizeof(void *) - 3)),
FIXNUM_MAX =
((intptr_t)1 << (4 * sizeof(void *) - 3)) - 1;
enum builtin {
BUILTIN_BUILTIN_CLASS_BIGNUM,
BUILTIN_BUILTIN_CLASS_BUILTIN_CLASS,
BUILTIN_BUILTIN_CLASS_BUILTIN_FUNCTION,
BUILTIN_BUILTIN_CLASS_BUILTIN_OBJECT,
BUILTIN_BUILTIN_CLASS_CHARACTER,
BUILTIN_BUILTIN_CLASS_COMPILED_FUNCTION,
BUILTIN_BUILTIN_CLASS_CONS,
BUILTIN_BUILTIN_CLASS_DIRECT_SLOT_DEFINITION,
BUILTIN_BUILTIN_CLASS_EFFECTIVE_SLOT_DEFINITION,
BUILTIN_BUILTIN_CLASS_FIXNUM,
BUILTIN_BUILTIN_CLASS_GENERIC_FUNCTION,
BUILTIN_BUILTIN_CLASS_HASHTABLE_EQ,
BUILTIN_BUILTIN_CLASS_HASHTABLE_EQUAL,
BUILTIN_BUILTIN_CLASS_METHOD,
BUILTIN_BUILTIN_CLASS_NULL,
BUILTIN_BUILTIN_CLASS_PACKAGE,
BUILTIN_BUILTIN_CLASS_STANDARD_CLASS,
BUILTIN_BUILTIN_CLASS_STANDARD_OBJECT,
BUILTIN_BUILTIN_CLASS_STRING,
BUILTIN_BUILTIN_CLASS_SYMBOL,
BUILTIN_BUILTIN_CLASS_THREADED_FUNCTION,
BUILTIN_BUILTIN_CLASS_VECTOR_VALUE_ADJ_FILL,
BUILTIN_BUILTIN_CLASS_VECTOR_VALUE_NOADJ_FILL,
BUILTIN_BUILTIN_CLASS_VECTOR_VALUE_NOADJ_NOFILL,
BUILTIN_FUNCTION_CLASS_DIRECT_SLOTS,
BUILTIN_FUNCTION_CLASS_DIRECT_SUBCLASSES,
BUILTIN_FUNCTION_CLASS_DIRECT_SUPERCLASSES,
BUILTIN_FUNCTION_CLASS_NAME,
BUILTIN_FUNCTION_CLASS_PRECEDENCE_LIST,
BUILTIN_FUNCTION_CLASS_SLOTS,
BUILTIN_FUNCTION_EQ,
BUILTIN_FUNCTION_EQUAL,
BUILTIN_FUNCTION_GETHASH,
BUILTIN_FUNCTION_GETSLOT,
BUILTIN_FUNCTION_SETHASH,
BUILTIN_FUNCTION_SETSLOT,
BUILTIN_FUNCTION_SLOT_LOCATION,
BUILTIN_FUNCTION_SLOT_NAME,
BUILTIN_FUNCTION_SLOT_TYPE,
BUILTIN_FUNCTION_VECTOR_GET,
BUILTIN_FUNCTION_VECTOR_PUSH,
BUILTIN_FUNCTION_VECTOR_PUSH_EXTEND,
BUILTIN_FUNCTION_VECTOR_SET,
BUILTIN_VARIABLE_DSTACK,
BUILTIN_VARIABLE_RSTACK,
BUILTINS_COUNT,
};
static struct value builtins[BUILTINS_COUNT];
enum builtin_class_slot_index {
BUILTIN_CLASS__NAME,
BUILTIN_CLASS__FINALIZED,
BUILTIN_CLASS__DIRECT_SUPERCLASSES,
BUILTIN_CLASS__DIRECT_SUBCLASSES,
BUILTIN_CLASS__PRECEDENCE_LIST,
BUILTIN_CLASS_SLOT_COUNT,
};
enum standard_class_slot_index {
STANDARD_CLASS__NAME,
STANDARD_CLASS__FINALIZED,
STANDARD_CLASS__DIRECT_SUPERCLASSES,
STANDARD_CLASS__DIRECT_SUBCLASSES,
STANDARD_CLASS__PRECEDENCE_LIST,
STANDARD_CLASS__DIRECT_SLOTS,
STANDARD_CLASS__SLOTS,
STANDARD_CLASS_SLOT_COUNT,
};
static void push(struct value value) {}
static struct value pop(void) { return (struct value){.bits = 0}; }
struct value alloc_builtin_object(struct value class, size_t value_slot_count,
size_t untraced_slot_count) {
assume(value_slot_count != 0);
struct object *obj;
if (class.bits == builtins[BUILTIN_BUILTIN_CLASS_COMPILED_FUNCTION].bits)
obj = gc_alloc_compiled_function(value_slot_count, untraced_slot_count);
else if (class.bits == builtins[BUILTIN_BUILTIN_CLASS_HASHTABLE_EQ].bits)
obj = gc_alloc_hashtable_eq(value_slot_count, untraced_slot_count);
else
obj = gc_alloc(value_slot_count, untraced_slot_count);
gc_write_value_slot(obj, 0, class);
return (struct value){
.bits = (uintptr_t)obj | TAG_BUILTIN_OBJECT,
};
}
struct value integer_of_int(intptr_t n) {
if (FIXNUM_MIN <= n && n <= FIXNUM_MAX) {
struct value value = (struct value){.bits = (n << 2) | TAG_FIXNUM};
assume(untag_fixnum(value) == n);
return value;
} else {
todo("integer_of_int: bigint %" PRIdPTR, n);
}
}
enum value_tag get_tag(struct value value) {
uintptr_t low_bits = value.bits & 0b111;
switch (low_bits) {
case 0b000:
case 0b010:
case 0b100:
case 0b110:
return (enum value_tag)low_bits;
case 0b001:
case 0b101:
return TAG_FIXNUM;
default:
unreachable("invalid tag for value %p", (void *)value.bits);
}
}
bool is_ptr(struct value value) { return !(value.bits & 1); }
struct value tag_ptr(struct object *obj, enum value_tag tag) {
assume(tag == TAG_BIGINT_OR_NIL || tag == TAG_BUILTIN_OBJECT ||
tag == TAG_SIMPLE_ARRAY || tag == TAG_STANDARD_OBJECT ||
tag == TAG_GC_INTERNAL);
assume(((uintptr_t)obj & 0b111) == 0);
return (struct value){.bits = (uintptr_t)obj | tag};
}
intptr_t untag_fixnum(struct value value) {
assume(get_tag(value) == TAG_FIXNUM);
intptr_t bits = value.bits;
return bits >> 2;
}
struct object *untag_ptr(struct value value) {
assume(is_ptr(value));
return (struct object *)((uintptr_t)value.bits & ~0b111);
}
void bootstrap(void) {
// Since it is its own class, standard-class needs to be constructed
// manually.
{
struct object *obj = gc_alloc(STANDARD_CLASS_SLOT_COUNT + 1, 0);
builtins[BUILTIN_BUILTIN_CLASS_STANDARD_CLASS] = (struct value){
.bits = (uintptr_t)obj | TAG_BUILTIN_OBJECT,
};
gc_write_value_slot(obj, 0, builtins[BUILTIN_BUILTIN_CLASS_STANDARD_CLASS]);
// TODO
}
//
}
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