icode.c

kaffe是一个java虚拟机的源代码。里面包含了一些java例程和标准的java包。

	l->type = Lcode;
	return (l);
}

label*
reference_table_label(int32 n)
{
	label* l;

	assert(n < MAXLABTAB);
	if (labtab[n] == 0) {
		l = newLabel();
		labtab[n] = l;
		l->type = Lnull;
		l->at = 0;
		l->from = 0;
		l->to = 0;
	}
	else {
		l = labtab[n];
		labtab[n] = 0;
	}
	return (l);
}

SlotInfo*
stored_code_label(SlotInfo* dst)
{
	return (dst);
}

SlotInfo*
table_code_label(SlotInfo* dst)
{
	return (dst);
}

#if defined(HAVE_set_label)
void
set_label(int i, int n)
{
	assert(n < MAXLABTAB);
	if (labtab[n] == 0) {
		labtab[n] = newLabel();
		labtab[n]->type = Linternal;
		labtab[n]->at = 0;
		labtab[n]->from = 0;
		labtab[n]->to = 0;
		slot_slot_const(0, 0, (jword)labtab[n], HAVE_set_label, Tnull);
	}
	else {
		assert(labtab[n]->type == Lnull);
		labtab[n]->type = Linternal;
		slot_slot_const(0, 0, (jword)labtab[n], HAVE_set_label, Tnull);
		labtab[n] = 0;
	}
}
#endif

#if defined(HAVE_build_code_ref)
label*
build_code_ref(uint8* pos, uintp pc)
{
	label* l;
	jint offset;

	offset = (pos[0] * 0x01000000 + pos[1] * 0x00010000 +
		  pos[2] * 0x00000100 + pos[3] * 0x00000001);
	l = reference_code_label(pc+offset);

	slot_slot_const(0, 0, (jword)l, HAVE_build_code_ref, Tnull);
	return (l);
}
#endif

#if defined(HAVE_build_key)
void
build_key(uint8* pos)
{
	jint val = (pos[0] * 0x01000000 + pos[1] * 0x00010000 +
		    pos[2] * 0x00000100 + pos[3] * 0x00000001);

	slot_slot_const(0, 0, val, HAVE_build_key, Tnull);
}
#endif


/* ----------------------------------------------------------------------- */
/* Comparisons.								   */
/*									   */

#if defined(HAVE_cmp_int)
void
cmp_int_const(SlotInfo* dst, SlotInfo* src, jint val)
{
#if defined(HAVE_cmp_int_const)
	if (HAVE_cmp_int_const_rangecheck(val)) {
		slot_slot_const(dst, src, val, HAVE_cmp_int_const, Tcomplex);
	}
	else
#endif
	{
		SlotInfo* tmp;
		slot_alloctmp(tmp);
		move_int_const(tmp, val);
		cmp_int(dst, src, tmp);
		slot_freetmp(tmp);
	}
}

void
cmp_int(SlotInfo* dst, SlotInfo* src, SlotInfo* src2)
{
	slot_slot_slot(dst, src, src2, HAVE_cmp_int, Tcomplex);
}
#endif

#if defined(HAVE_cmp_ref)
void
cmp_ref_const(SlotInfo* dst, SlotInfo* src, void* val)
{
#if defined(HAVE_cmp_ref_const)
	if (HAVE_cmp_ref_const_rangecheck((jword)val)) {
		slot_slot_const(dst, src, (jword)val, HAVE_cmp_ref_const, Tcomplex);
	}
	else
#endif
	{
		SlotInfo* tmp;
		slot_alloctmp(tmp);
		move_ref_const(tmp, val);
		cmp_ref(dst, src, tmp);
		slot_freetmp(tmp);
	}
}

void
cmp_ref(SlotInfo* dst, SlotInfo* src, SlotInfo* src2)
{
	slot_slot_slot(dst, src, src2, HAVE_cmp_ref, Tcomplex);
}
#endif

void
lcmp(SlotInfo* dst, SlotInfo* src, SlotInfo* src2)
{
#if defined(HAVE_lcmp)
	slot_lslot_lslot(dst, src, src2, HAVE_lcmp, Tcomplex);
#else
	end_sub_block();
	pusharg_long(src2, pusharg_long_idx_inc);
	pusharg_long(src, 0);
	call_soft(soft_lcmp);
	popargs();
	start_sub_block();
	return_int(dst);
#endif
}

void
cmpl_float(SlotInfo* dst, SlotInfo* src, SlotInfo* src2)
{
#if defined(HAVE_cmpl_float)
	slot_slot_slot(dst, src, src2, HAVE_cmpl_float, Tcomplex);
#else
	end_sub_block();
	pusharg_float(src2, 1);
	pusharg_float(src, 0);
	call_soft(soft_fcmpl);
	popargs();
	start_sub_block();
	return_int(dst);
#endif
}

void
cmpl_double(SlotInfo* dst, SlotInfo* src, SlotInfo* src2)
{
#if defined(HAVE_cmpl_double)
	slot_lslot_lslot(dst, src, src2, HAVE_cmpl_double, Tcomplex);
#else
	end_sub_block();
	pusharg_double(src2, pusharg_long_idx_inc);
	pusharg_double(src, 0);
	call_soft(soft_dcmpl);
	popargs();
	start_sub_block();
	return_int(dst);
#endif
}

void
cmpg_float(SlotInfo* dst, SlotInfo* src, SlotInfo* src2)
{
#if defined(HAVE_cmpg_float)
	slot_slot_slot(dst, src, src2, HAVE_cmpg_float, Tcomplex);
#else
	end_sub_block();
	pusharg_float(src2, 1);
	pusharg_float(src, 0);
	call_soft(soft_fcmpg);
	popargs();
	start_sub_block();
	return_int(dst);
#endif
}

void
cmpg_double(SlotInfo* dst, SlotInfo* src, SlotInfo* src2)
{
#if defined(HAVE_cmpg_double)
	slot_lslot_lslot(dst, src, src2, HAVE_cmpg_double, Tcomplex);
#else
	end_sub_block();
	pusharg_double(src2, pusharg_long_idx_inc);
	pusharg_double(src, 0);
	call_soft(soft_dcmpg);
	popargs();
	start_sub_block();
	return_int(dst);
#endif
}

/* ----------------------------------------------------------------------- */
/* Conversions.								   */
/*									   */

void
cvt_int_long(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_int_long)
	lslot_lslot_slot(dst, 0, src, HAVE_cvt_int_long, Tcomplex);
#else
	move_int(LSLOT(dst), src);
	ashr_int_const(HSLOT(dst), src, (8 * sizeof(jint)) - 1);
#endif
}

void
cvt_int_float(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_int_float)
	slot_slot_slot(dst, 0, src, HAVE_cvt_int_float, Tcomplex);
#else
	end_sub_block();
	pusharg_int(src, 0);
	call_soft(soft_cvtif);
	popargs();
	start_sub_block();
	return_float(dst);
#endif
}

void
cvt_int_double(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_int_double)
	lslot_lslot_slot(dst, 0, src, HAVE_cvt_int_double, Tcomplex);
#else
	end_sub_block();
	pusharg_int(src, 0);
	call_soft(soft_cvtid);
	popargs();
	start_sub_block();
	return_double(dst);
#endif
}

void
cvt_long_int(SlotInfo* dst, SlotInfo* src)
{
	move_int(dst, LSLOT(src));
}

void
cvt_long_float(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_long_float)
	slot_slot_lslot(dst, 0, src, HAVE_cvt_long_float, Tcomplex);
#else
	end_sub_block();
	pusharg_long(src, 0);
	call_soft(soft_cvtlf);
	popargs();
	start_sub_block();
	return_float(dst);
#endif
}

void
cvt_long_double(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_long_double)
	lslot_lslot_lslot(dst, 0, src, HAVE_cvt_long_double, Tcomplex);
#else
	end_sub_block();
	pusharg_long(src, 0);
	call_soft(soft_cvtld);
	popargs();
	start_sub_block();
	return_double(dst);
#endif
}

void
cvt_float_int(SlotInfo* dst, SlotInfo* src)
{
	used_ieee_rounding = true;
#if defined(HAVE_cvt_float_int)
	slot_slot_slot(dst, 0, src, HAVE_cvt_float_int, Tcomplex);
#else
	end_sub_block();
	pusharg_float(src, 0);
	call_soft(soft_cvtfi);
	popargs();
	start_sub_block();
	return_int(dst);
#endif
}

void
cvt_float_long(SlotInfo* dst, SlotInfo* src)
{
	used_ieee_rounding = true;
#if defined(HAVE_cvt_float_long)
	lslot_lslot_slot(dst, 0, src, HAVE_cvt_float_long, Tcomplex);
#else
	end_sub_block();
	pusharg_float(src, 0);
	call_soft(soft_cvtfl);
	popargs();
	start_sub_block();
	return_long(dst);
#endif
}

void
cvt_float_double(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_float_double)
	lslot_lslot_slot(dst, 0, src, HAVE_cvt_float_double, Tcomplex);
#else
	end_sub_block();
	pusharg_float(src, 0);
	call_soft(soft_cvtfd);
	popargs();
	start_sub_block();
	return_double(dst);
#endif
}

void
cvt_double_int(SlotInfo* dst, SlotInfo* src)
{
	used_ieee_rounding = true;
#if defined(HAVE_cvt_double_int)
	slot_slot_lslot(dst, 0, src, HAVE_cvt_double_int, Tcomplex);
#else
	end_sub_block();
	pusharg_double(src, 0);
	call_soft(soft_cvtdi);
	popargs();
	start_sub_block();
	return_int(dst);
#endif
}

void
cvt_double_long(SlotInfo* dst, SlotInfo* src)
{
	used_ieee_rounding = true;
#if defined(HAVE_cvt_double_long)
	lslot_lslot_lslot(dst, 0, src, HAVE_cvt_double_long, Tcomplex);
#else
	end_sub_block();
	pusharg_double(src, 0);
	call_soft(soft_cvtdl);
	popargs();
	start_sub_block();
	return_long(dst);
#endif
}

void
cvt_double_float(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_double_float)
	slot_slot_lslot(dst, 0, src, HAVE_cvt_double_float, Tcomplex);
#else
	end_sub_block();
	pusharg_double(src, 0);
	call_soft(soft_cvtdf);
	popargs();
	start_sub_block();
	return_float(dst);
#endif
}

void
cvt_int_byte(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_int_byte)
	slot_slot_slot(dst, 0, src, HAVE_cvt_int_byte, Tcomplex);
#else
	lshl_int_const(dst, src, 8 * (sizeof(jint) - sizeof(jbyte)));
	ashr_int_const(dst, dst, 8 * (sizeof(jint) - sizeof(jbyte)));
#endif
}

void
cvt_int_char(SlotInfo* dst, SlotInfo* src)
{
	and_int_const(dst, src, (1 << (8 * sizeof(jchar))) - 1);
}

void
cvt_int_short(SlotInfo* dst, SlotInfo* src)
{
#if defined(HAVE_cvt_int_short)
	slot_slot_slot(dst, 0, src, HAVE_cvt_int_short, Tcomplex);
#else
	lshl_int_const(dst, src, 8 * (sizeof(jint) - sizeof(jshort)));
	ashr_int_const(dst, dst, 8 * (sizeof(jint) - sizeof(jshort)));
#endif
}



/* ----------------------------------------------------------------------- */
/* Breakpoints.								   */
/*									   */

void
softcall_breakpoint()
{
	ABORT();
}

/* ----------------------------------------------------------------------- */
/* Build call frame.							   */
/*									   */

void
build_call_frame(Utf8Const* sig, SlotInfo* obj, int sp_idx)
{
	struct pusharg_info {
		char type;
		uint16 arg_idx;
		uint16 sp_idx;
	};
	static struct pusharg_info* args;
	static int sz_args = 0;
	int arg_idx;
	int idx;
	const char* sigptr;

	/* Make sure we have enough argument space */
	if (sp_idx + 1 > sz_args) {
		/* add differential */
		addToCounter(&jitmem, "jitmem-temp", 1,
			(sp_idx + 1 - sz_args) * sizeof(struct pusharg_info));
		sz_args = sp_idx + 1;
		args = KREALLOC(args, sizeof(struct pusharg_info) * sz_args);
	}

	/* If we've got an object ... */
	idx = 0;
	if (obj != 0) {
		args[idx].type = 'O';
		args[idx].arg_idx = idx;
		args[idx].sp_idx = sp_idx;
		idx++;
	}
	sp_idx--;
	arg_idx = idx;

	sigptr = sig->data;
	assert(sigptr[0] == '(');
	for (sigptr++; *sigptr != ')'; sigptr++) {

		args[idx].arg_idx = arg_idx;
		args[idx].sp_idx = sp_idx;
		args[idx].type = *sigptr;

		switch (*sigptr) {
		case '[':
			while (*++sigptr == '[')
				;
			if (*sigptr == 'L') {
				sigptr = strchr(sigptr, ';');
			}
			break;

		case 'L':
			sigptr = strchr(sigptr, ';');
			break;

		case 'I':
		case 'Z':
		case 'S':
		case 'B':
		case 'C':
		case 'F':
			break;

		case 'J':
		case 'D':
			sp_idx--;
			args[idx].sp_idx = sp_idx;
			arg_idx += pusharg_long_idx_inc - 1;
			break;

		case 'V':
		default:
			ABORT();
		}

		sp_idx--;
		arg_idx++;
		idx++;
	}

	for (idx--; idx >= 0; idx--) {
		sp_idx = args[idx].sp_idx;
		arg_idx = args[idx].arg_idx;
		switch (args[idx].type) {
		case 'L':
		case '[':
			pusharg_ref(stack(sp_idx), arg_idx);
			break;
		case 'O':
			/* Special: object we've invoking on */
			pusharg_ref(obj, arg_idx);
			break;
		case 'I':
		case 'Z':
		case 'S':
		case 'B':
		case 'C':
			{
				pusharg_int(stack(sp_idx), arg_idx);
			}
			break;
		case 'J':
			pusharg_long(stack_long(sp_idx), arg_idx);
			break;
		case 'F':
			pusharg_float(stack_float(sp_idx), arg_idx);
			break;
		case 'D':
			pusharg_double(stack_double(sp_idx), arg_idx);
			break;
		}
	}
}

/* ----------------------------------------------------------------------- */
/* Soft calls.								   */
/*									   */

void
softcall_lookupinterfacemethod(SlotInfo* dst, Method* meth, SlotInfo* obj)
{
	/* 'obj' must be written back since it will be reused */
	prepare_function_call();
	/* FIXME: should there be a pusharg_int_const? */
	pusharg_ref_const((void*)(int)meth->idx, 2);		
	pusharg_class_const(meth->class, 1);
	pusharg_ref(obj, 0);
	call_soft(soft_lookupinterfacemethod);
	popargs();
	fixup_function_call();
	return_ref(dst);
}

void
check_array_index(SlotInfo* obj, SlotInfo* idx)
{
	SlotInfo* tmp;

	slot_alloctmp(tmp);
	load_offset_int(tmp, obj, object_array_length);
#if defined(HAVE_ccall_ugt)
	ccall_int_ugt(tmp, idx, soft_badarrayindex);
#else
	end_sub_block();
	cbranch_int_ult(idx, tmp, reference_label(1, 1));
	call_soft(soft_badarrayindex);
	start_sub_block();
	set_label(1, 1);
#endif
	slot_freetmp(tmp);
}

void
check_array_constindex(SlotInfo* obj, jint idx)
{
	SlotInfo* tmp;

	slot_alloctmp(tmp);
	load_offset_int(tmp, obj, object_array_length);
#if defined(HAVE_ccall_ugt)
	ccall_int_const_ugt(tmp, idx, soft_badarrayindex);
#else
	end_sub_block();
	cbranch_int_const_ugt(tmp, idx, reference_label(1, 1));
	call_soft(soft_badarrayindex);
	start_sub_block();
	set_label(1, 1);
#endif
	slot_freetmp(tmp);
}

#if defined(HAVE_ccall_ugt)
void
ccall_ugt(void* func)
{
	slot_const_const(0, 0, (jword)func, HAVE_ccall_ugt, Tnull);
}

void
ccall_int_ugt(SlotInfo* s1, SlotInfo* s2, void* func)
{
	cmp_int(0, s1, s2);
	ccall_ugt(func);
}

void
ccall_int_const_ugt(SlotInfo* s1, jint s2, void* func)
{
	cmp_int_const(0, s1, s2);
	ccall_ugt(func);
}
#endif

void
softcall_nullpointer(void)
{
	sync_registers();
	call_soft(soft_nullpointer);
}


void
softcall_nosuchclass(Utf8Const* name)
{
	sync_registers();
	prepare_function_call();
	pusharg_utf8_const(name, 0);
	call_soft(soft_nosuchclass);
	popargs();
	fixup_function_call();
}

void
softcall_nosuchmethod(Hjava_lang_Class* cls, Utf8Const* name, Utf8Const* sig)
{
	sync_registers();
	prepare_function_call();
	pusharg_utf8_const(sig, 0);
	pusharg_utf8_const(name, 0);
	pusharg_class_const(cls, 0);
	call_soft(soft_nosuchmethod);
	popargs();
	fixup_function_call();
}

void
softcall_nosuchfield(Utf8Const* cls, Utf8Const* name)
{
	sync_registers();
	prepare_function_call();
	pusharg_utf8_const(name, 1);
	pusharg_utf8_const(cls, 0);
	call_soft(soft_nosuchfield);
	popargs();
	fixup_function_call();
}

void
softcall_new(SlotInfo* dst, Hjava_lang_Class* classobj)
{
	prepare_function_call();