index 4b5b9474c0a2f006c99e15c5e4251e37763785b1..f0768d8b69d5d9fda94829c343d116d44a2b0e7f 100644 (file)
}
static void
-jvm_generate_new(gen_proc_t * p, oberon_type_t * type, int num);
+jvm_generate_load(gen_proc_t * p, oberon_type_t * src_type, gen_var_t * src)
+{
+ char prefix;
+ int cell_size;
-/*
- * Функция jvm_generate_static_array_initialization генерирует код для
- * статической инициализации массива. На входе массив, на выходе тот же массив.
- * (arrayref -- arrayref)
- */
+ cell_size = jvm_cell_size_for_type(src_type);
+
+ switch(src -> storage)
+ {
+ case JVM_STORAGE_REGISTER:
+ prefix = jvm_get_prefix(src_type);
+ jvm_generate(p, 0, cell_size, "%cload %i", prefix, src -> reg);
+ break;
+ case JVM_STORAGE_STATIC:
+ jvm_generate(p, 0, cell_size, "getstatic %s %s", src -> full_name, src -> desc);
+ break;
+ case JVM_STORAGE_FIELD:
+ jvm_generate(p, 1, cell_size, "getfield %s %s", src -> full_name, src -> desc);
+ break;
+ default:
+ gen_error("jvm_generate_load: unknow storage type %i", src -> storage);
+ break;
+ }
+}
static void
-jvm_generate_static_array_initialization(gen_proc_t * p, oberon_type_t * type)
+jvm_generate_store(gen_proc_t * p, oberon_type_t * src_type, gen_var_t * dst)
{
- /* for(int i = 0; i < a.length; i++) */
- /* a[i] := new(base); */
- /* init(a[i]) */
-
- /* a := pop(array) */
- gen_var_t * va = oberon_generator_new_var();
- jvm_generate_and_init_local_var(va, p, false);
- int reg_a = va -> reg;
- /* ссылка уже на стеке */
- jvm_generate(p, 1, 0, "astore %i", reg_a);
-
- /* int i = 0; */
- gen_var_t * vi = oberon_generator_new_var();
- jvm_generate_and_init_local_var(vi, p, false);
- int reg_i = vi -> reg;
- jvm_generate(p, 0, 1, "iconst_0");
- jvm_generate(p, 1, 0, "istore %i", reg_i);
+ char prefix;
+ int cell_size;
- /* int l := a.length */
- gen_var_t * vl = oberon_generator_new_var();
- jvm_generate_and_init_local_var(vl, p, false);
- int reg_l = vl -> reg;
- jvm_generate(p, 0, 1, "aload %i", reg_a);
- jvm_generate(p, 1, 1, "arraylength");
- jvm_generate(p, 1, 0, "istore %i", reg_l);
+ cell_size = jvm_cell_size_for_type(src_type);
- int label_start = jvm_new_label_id(p);
- int label_end = jvm_new_label_id(p);
+ switch(dst -> storage)
+ {
+ case JVM_STORAGE_REGISTER:
+ prefix = jvm_get_prefix(src_type);
+ jvm_generate(p, cell_size, 0, "%cstore %i", prefix, dst -> reg);
+ break;
+ case JVM_STORAGE_STATIC:
+ jvm_generate(p, cell_size, 0, "putstatic %s %s", dst -> full_name, dst -> desc);
+ break;
+ case JVM_STORAGE_FIELD:
+ jvm_generate(p, 1 + cell_size, 0, "putfield %s %s", dst -> full_name, dst -> desc);
+ break;
+ default:
+ gen_error("jvm_generate_store: unknow storage type %i", dst -> storage);
+ break;
+ }
+}
- /* start: */
- /* if (i >= l) goto end; */
- /* body*/
- /* i += 1;*/
- /* goto start;*/
- /* end: */
- /* push a */
+static void
+jvm_generate_new(gen_proc_t * p, oberon_type_t * type, int num);
- jvm_generate_label(p, label_start);
- jvm_generate(p, 0, 1, "iload %i", reg_i);
- jvm_generate(p, 0, 1, "iload %i", reg_l);
- jvm_generate(p, 2, 0, "if_icmpge L%i", label_end);
+/*
+ * Генерирует код для инициализации массива со статическим базовым типом
+ * ( aref -- )
+ */
- if(type -> base -> class == OBERON_TYPE_ARRAY)
+static void
+jvm_generate_array_initialization(gen_proc_t * p, oberon_type_t * arr)
+{
+ int dim = 0;
+ oberon_type_t * base = arr;
+ while(base -> class == OBERON_TYPE_ARRAY)
{
- /* Инициализируем следующую размерность */
- jvm_generate(p, 0, 1, "aload %i", reg_a);
- jvm_generate(p, 0, 1, "iload %i", reg_i);
- jvm_generate(p, 0, 1, "aaload");
- jvm_generate_static_array_initialization(p, type -> base);
- jvm_generate(p, 1, 0, "pop");
+ dim += 1;
+ base = base -> base;
}
- else if(type -> base -> class == OBERON_TYPE_RECORD)
+
+ if(base -> class != OBERON_TYPE_RECORD)
{
- jvm_generate(p, 0, 1, "aload %i", reg_a);
- jvm_generate(p, 0, 1, "iload %i", reg_i);
- jvm_generate_new(p, type -> base, 0);
- jvm_generate(p, 3, 0, "aastore");
+ jvm_generate(p, 1, 0, "pop");
+ return;
}
- else
+
+ struct {
+ gen_var_t * index;
+ gen_var_t * length;
+ int start;
+ int end;
+ } loop[dim];
+
+ gen_var_t * dst = oberon_generator_new_var();
+ jvm_generate_and_init_local_var(dst, p, false);
+ jvm_generate_store(p, arr, dst);
+
+ /*
+ * Входящие параметры заграблены.
+ * Теперь генерируем эквивалентный код:
+ * int i = 0;
+ * int len = dst.length
+ * while(i < len)
+ * {
+ * ...
+ * {
+ * dst[i, ...] = new record;
+ * }
+ * ...
+ * i += 1;
+ * }
+ * Где "..." такой же код (начало и конец) для следующей размерности.
+ */
+
+ for(int i = 0; i < dim; i++)
{
- assert(0);
- }
+ loop[i].index = oberon_generator_new_var();
+ loop[i].length = oberon_generator_new_var();
+ loop[i].start = jvm_new_label_id(p);
+ loop[i].end = jvm_new_label_id(p);
+ jvm_generate_and_init_local_var(loop[i].index, p, false);
+ jvm_generate_and_init_local_var(loop[i].length, p, false);
+
+ /* TODO преределать через jvm_generate_load{{store}} */
- /* i += 1; */
- /* goto start */
+ jvm_generate(p, 0, 1, "iconst_0");
+ jvm_generate(p, 1, 0, "istore %i", loop[i].index -> reg);
- jvm_generate(p, 0, 0, "iinc %i %i", reg_i, 1);
- jvm_generate(p, 0, 0, "goto L%i", label_start);
- jvm_generate_label(p, label_end);
+ jvm_generate_load(p, arr, dst);
+ jvm_generate(p, 1, 1, "arraylength");
+ jvm_generate(p, 1, 0, "istore %i", loop[i].length -> reg);
+
+ /* if(i >= len) goto end; */
+ jvm_generate_label(p, loop[i].start);
+ jvm_generate(p, 0, 1, "iload %i", loop[i].index -> reg);
+ jvm_generate(p, 0, 1, "iload %i", loop[i].length -> reg);
+ jvm_generate(p, 2, 0, "if_icmpge L%i", loop[i].end);
+ }
- /* push(a) */
- jvm_generate(p, 0, 1, "aload %i", reg_a);
+ jvm_generate_load(p, arr, dst);
+ jvm_generate(p, 0, 1, "iload %i", loop[0].index -> reg);
+ for(int i = 1; i < dim; i++)
+ {
+ jvm_generate(p, 2, 1, "aaload");
+ jvm_generate(p, 0, 1, "iload %i", loop[i].index -> reg);
+ }
+ jvm_generate_new(p, base, 0);
+ jvm_generate(p, 3, 0, "aastore");
- /* TODO освобождение регистров */
+ for(int i = dim - 1; i >= 0; i--)
+ {
+ jvm_generate(p, 0, 0, "iinc %i 1", loop[i].index -> reg);
+ jvm_generate(p, 0, 0, "goto L%i", loop[i].start);
+ jvm_generate_label(p, loop[i].end);
+ }
}
static void
gen_error("jvm_generate_new_static: static alocation not allowed");
break;
case OBERON_TYPE_RECORD:
+ assert(num == 0);
cname = jvm_get_class_full_name(type);
jvm_generate(p, 0, 1, "new %s", cname);
jvm_generate(p, 1, 2, "dup");
assert(num == 0);
jvm_generate(p, dim, 1, "multianewarray %s %i", desc, dim);
-
- if(base -> class == OBERON_TYPE_RECORD)
- {
- jvm_generate_static_array_initialization(p, type);
- }
+ jvm_generate(p, 1, 2, "dup");
+ jvm_generate_array_initialization(p, type);
break;
default:
gen_error("jvm_generate_new_static: unk type class %i", type -> class);
}
}
-static void
-jvm_generate_load(gen_proc_t * p, oberon_type_t * src_type, gen_var_t * src)
-{
- char prefix;
- int cell_size;
-
- cell_size = jvm_cell_size_for_type(src_type);
-
- switch(src -> storage)
- {
- case JVM_STORAGE_REGISTER:
- prefix = jvm_get_prefix(src_type);
- jvm_generate(p, 0, cell_size, "%cload %i", prefix, src -> reg);
- break;
- case JVM_STORAGE_STATIC:
- jvm_generate(p, 0, cell_size, "getstatic %s %s", src -> full_name, src -> desc);
- break;
- case JVM_STORAGE_FIELD:
- jvm_generate(p, 1, cell_size, "getfield %s %s", src -> full_name, src -> desc);
- break;
- default:
- gen_error("jvm_generate_load: unknow storage type %i", src -> storage);
- break;
- }
-}
-
-static void
-jvm_generate_store(gen_proc_t * p, oberon_type_t * src_type, gen_var_t * dst)
-{
- char prefix;
- int cell_size;
-
- cell_size = jvm_cell_size_for_type(src_type);
-
- switch(dst -> storage)
- {
- case JVM_STORAGE_REGISTER:
- prefix = jvm_get_prefix(src_type);
- jvm_generate(p, cell_size, 0, "%cstore %i", prefix, dst -> reg);
- break;
- case JVM_STORAGE_STATIC:
- jvm_generate(p, cell_size, 0, "putstatic %s %s", dst -> full_name, dst -> desc);
- break;
- case JVM_STORAGE_FIELD:
- jvm_generate(p, 1 + cell_size, 0, "putfield %s %s", dst -> full_name, dst -> desc);
- break;
- default:
- gen_error("jvm_generate_store: unknow storage type %i", dst -> storage);
- break;
- }
-}
-
/*
* Генерирует код для копирования полей из первой записи во вторую.
* ( aref_dst aref_src -- )
jvm_generate_store(p, arr, src);
jvm_generate_store(p, arr, dst);
- /* Входящие параметры заграблены
+ /*
+ * Входящие параметры заграблены.
* Теперь генерируем эквивалентный код:
* int i = 0;
* int len = dst.length
jvm_generate(p, 2, 0, "if_icmpge L%i", loop[i].end);
}
- if(base -> class == OBERON_TYPE_ARRAY)
- {
- // Вся эта шляпа уже должна знать о всех размерностях
- gen_error("jvm_generate_copy_array: wat");
- }
- else if(base -> class == OBERON_TYPE_RECORD)
+ if(base -> class == OBERON_TYPE_RECORD)
{
/* Получаем записи по индексам ( -- dst src ) */
}
}
+static void
+jvm_generate_push_procedure_pointer(gen_proc_t * p, oberon_object_t * proc)
+{
+ char * full_name = jvm_get_field_full_name_safe(proc);
+ char * desc = jvm_get_descriptor(proc -> type);
+ jvm_generate(p, 0, 1, "getstatic %s/pointer %s", full_name, desc);
+}
+
// ==========================================
// ==========================================
// ==========================================
fprintf(fp, ".class public abstract %s\n", cname);
fprintf(fp, ".super java/lang/Object\n\n");
- fprintf(fp, ".method public <init>()V\n");
+ fprintf(fp, ".method <init>()V\n");
fprintf(fp, " aload_0\n");
fprintf(fp, " invokespecial java/lang/Object/<init>()V\n");
fprintf(fp, " return\n");
jvm_destroy_class(class);
}
+static void
+oberon_generate_procedure_pointer_class(oberon_object_t * proc)
+{
+ FILE * fp;
+ char * cname;
+ char * abscname;
+ char * absdesc;
+ char * signature;
+ struct gen_class * class;
+
+ cname = jvm_get_field_full_name_safe(proc);
+ class = jvm_create_class(cname);
+ abscname = jvm_get_class_full_name(proc -> type);
+ absdesc = jvm_get_descriptor(proc -> type);
+ fp = class -> fp;
+
+ fprintf(fp, ".source %s\n", proc -> module -> name);
+ fprintf(fp, ".class public %s\n", cname);
+ fprintf(fp, ".super %s\n\n", abscname);
+
+ fprintf(fp, ".field public static pointer %s\n\n", absdesc);
+
+ fprintf(fp, ".method <init>()V\n");
+ fprintf(fp, " aload_0\n");
+ fprintf(fp, " invokespecial %s/<init>()V\n", abscname);
+ fprintf(fp, " aload_0\n");
+ fprintf(fp, " putstatic %s/pointer %s\n", cname, absdesc);
+ fprintf(fp, " return\n");
+ fprintf(fp, ".end method\n\n");
+
+ signature = jvm_get_procedure_signature(proc -> type);
+
+ gen_proc_t * p;
+ gen_var_t * this_v;
+
+ p = jvm_create_proc(class);
+ jvm_generate_function_header(p, "public", "invoke", signature);
+
+ this_v = oberon_generator_new_var();
+ jvm_generate_and_init_local_var(this_v, p, false);
+
+ gen_var_t * v;
+ int use_size = 0;
+ int num = proc -> type -> num_decl;
+ oberon_object_t * arg = proc -> type -> decl;
+ for(int i = 0; i < num; i++)
+ {
+ v = oberon_generator_new_var();
+ bool wide = jvm_is_wide_type(arg -> type);
+ char * desc = jvm_get_descriptor(arg -> type);
+ jvm_generate_and_init_named_local_var(v, p, wide, arg -> name, desc);
+
+ jvm_generate_load(p, arg -> type, v);
+
+ use_size += (wide) ? (2) : (1);
+
+ arg = arg -> next;
+ }
+
+ char * full_name = jvm_get_field_full_name(proc);
+ int cell_size = jvm_cell_size_for_type(proc -> type -> base);
+
+ jvm_generate(p, use_size, cell_size, "invokestatic %s%s", full_name, signature);
+
+ if(proc -> type -> base -> class == OBERON_TYPE_VOID)
+ {
+ jvm_generate(p, 0, 0, "return");
+ }
+ else
+ {
+ char prefix = jvm_get_prefix(proc -> type -> base);
+ jvm_generate(p, cell_size, 0, "%creturn", prefix);
+ }
+
+ jvm_generate_function_end(p);
+
+ jvm_destroy_class(class);
+}
+
static void
oberon_generate_record_class(gen_module_t * m, oberon_type_t * rec)
{
/* смотри oberon_generator_init_record() */
break;
case OBERON_CLASS_VAR:
- /* Локальные заполняются при генерации функции */
+ /* Локальные заполняются при генерации функции */
/* смотри jvm_init_local_object() */
if(var -> local == 0)
{
{
gen_error("generator: local procedures not implemented");
}
+
+ oberon_generate_procedure_pointer_class(proc);
}
void
jvm_generate_store(p, x -> type, x -> gen_var);
}
}
+ else if(x -> class == OBERON_CLASS_PROC)
+ {
+ char * cname = jvm_get_field_full_name_safe(x);
+ jvm_generate(p, 0, 1, "new %s", cname);
+ jvm_generate(p, 1, 0, "invokespecial %s/<init>()V", cname);
+ }
+
x = x -> next;
}
}
}
}
+/*
+ * Генерирует код для получения размера измерения массива
+ * Аналог Обероновского LEN(v, n); где n = 0 - первое измерение.
+ * ( aref -- int )
+ */
+
+static void
+jvm_generate_array_len(gen_proc_t * p, int dim)
+{
+ while(dim > 0)
+ {
+ jvm_generate(p, 0, 1, "iconst_0");
+ jvm_generate(p, 2, 1, "aaload");
+ dim -= 1;
+ }
+ jvm_generate(p, 1, 1, "arraylength");
+}
+
+static void
+jvm_generate_array_duplicate_and_replace(gen_proc_t * p, gen_var_t * v, oberon_type_t * arr)
+{
+ int dim = 0;
+ oberon_type_t * base = arr;
+ while(base -> class == OBERON_TYPE_ARRAY)
+ {
+ if(base -> size == 0)
+ {
+ jvm_generate_load(p, arr, v);
+ jvm_generate_array_len(p, dim);
+ dim += 1;
+ }
+ base = base -> base;
+ }
+
+ jvm_generate_new(p, arr, dim);
+ jvm_generate(p, 1, 2, "dup");
+ jvm_generate_load(p, arr, v);
+ jvm_generate_copy_array(p, arr);
+ jvm_generate_store(p, arr, v);
+}
+
+static void
+jvm_generate_record_duplicate_and_replace(gen_proc_t * p, gen_var_t * v, oberon_type_t * rec)
+{
+ jvm_generate_new(p, rec, 0);
+ jvm_generate(p, 1, 2, "dup");
+ jvm_generate_load(p, rec, v);
+ jvm_generate_copy_record(p, rec);
+ jvm_generate_store(p, rec, v);
+}
+
void
oberon_generate_begin_proc(oberon_context_t * ctx, oberon_object_t * proc)
{
p = proc -> gen_proc;
signature = jvm_get_procedure_signature(proc -> type);
-
jvm_generate_function_header(p, "public static", proc -> name, signature);
+ /* Выделение регистров под параметры и переменные */
oberon_object_t * var = proc -> type -> decl;
while(var)
{
jvm_init_local_object(p, var);
var = var -> next;
}
+
+ /* Копирование статических/открытых массивов и записей */
+ var = proc -> type -> decl;
+ while(var)
+ {
+ if(var -> class == OBERON_CLASS_PARAM || var -> class == OBERON_CLASS_VAR_PARAM)
+ {
+ if(var -> type -> class == OBERON_TYPE_ARRAY)
+ {
+ jvm_generate_array_duplicate_and_replace(p, var -> gen_var, var -> type);
+ }
+ else if(var -> type -> class == OBERON_TYPE_RECORD)
+ {
+ jvm_generate_record_duplicate_and_replace(p, var -> gen_var, var -> type);
+ }
+ }
+ var = var -> next;
+ }
}
void
fullname = jvm_get_field_full_name(proc);
signature = jvm_get_procedure_signature(proc -> type);
+ if(proc -> class != OBERON_CLASS_PROC)
+ {
+ /* Загружаем указатель на процедуру */
+ jvm_generate_load(p, proc -> type, proc -> gen_var);
+ }
+
int args_cells = 0;
int result_cells = jvm_cell_size_for_type(proc -> type -> base);
arg = arg -> next;
}
- jvm_generate(p, args_cells, result_cells, "invokestatic %s%s", fullname, signature);
+ if(proc -> class == OBERON_CLASS_PROC)
+ {
+ /* Обычная статическая процедура */
+ jvm_generate(p, args_cells, result_cells, "invokestatic %s%s", fullname, signature);
+ }
+ else
+ {
+ /* Процедура-переменная */
+ char * class = jvm_get_class_full_name(proc -> type);
+ jvm_generate(p, 1 + args_cells, result_cells, "invokevirtual %s/invoke%s", class, signature);
+ }
}
void
switch(item -> mode)
{
case MODE_VAR:
- jvm_generate_load(p, item -> result, item -> var -> gen_var);
+ if(item -> var -> class == OBERON_CLASS_PROC)
+ {
+ jvm_generate_push_procedure_pointer(p, item -> var);
+ }
+ else
+ {
+ jvm_generate_load(p, item -> result, item -> var -> gen_var);
+ }
break;
case MODE_INTEGER:
jvm_generate_push_int(p, item -> integer);