1386
1387 // Performance measurements show the 1word and 2word variants to be almost equivalent,
1388 // with very light advantages for the 1word variant. We chose the 1word variant for
1389 // code compactness.
1390 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, tc3);
1391
1392 // Restore caller sp for c2i case and return.
1393 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started.
1394 __ blr();
1395
1396 // Generate a vanilla native entry as the slow path.
1397 BLOCK_COMMENT("} CRC32_updateBytes(Buffer)");
1398 BIND(slow_path);
1399 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), R11_scratch1);
1400 return start;
1401 }
1402
1403 return NULL;
1404 }
1405
1406 // These should never be compiled since the interpreter will prefer
1407 // the compiled version to the intrinsic version.
1408 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
1409 return !math_entry_available(method_kind(m));
1410 }
1411
1412 // How much stack a method activation needs in stack slots.
1413 // We must calc this exactly like in generate_fixed_frame.
1414 // Note: This returns the conservative size assuming maximum alignment.
1415 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
1416 const int max_alignment_size = 2;
1417 const int abi_scratch = frame::abi_reg_args_size;
1418 return method->max_locals() + method->max_stack() +
1419 frame::interpreter_frame_monitor_size() + max_alignment_size + abi_scratch;
1420 }
1421
1422 // Returns number of stackElementWords needed for the interpreter frame with the
1423 // given sections.
1424 // This overestimates the stack by one slot in case of alignments.
1425 int AbstractInterpreter::size_activation(int max_stack,
1426 int temps,
1427 int extra_args,
1428 int monitors,
1429 int callee_params,
1430 int callee_locals,
1431 bool is_top_frame) {
1432 // Note: This calculation must exactly parallel the frame setup
1433 // in InterpreterGenerator::generate_fixed_frame.
1434 assert(Interpreter::stackElementWords == 1, "sanity");
1435 const int max_alignment_space = StackAlignmentInBytes / Interpreter::stackElementSize;
1436 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) :
1437 (frame::abi_minframe_size / Interpreter::stackElementSize);
1438 const int size =
1439 max_stack +
1440 (callee_locals - callee_params) +
1441 monitors * frame::interpreter_frame_monitor_size() +
1442 max_alignment_space +
1443 abi_scratch +
1444 frame::ijava_state_size / Interpreter::stackElementSize;
1445
1446 // Fixed size of an interpreter frame, align to 16-byte.
1447 return (size & -2);
1448 }
1449
1450 // Fills a sceletal interpreter frame generated during deoptimizations.
1451 //
1452 // Parameters:
1453 //
1454 // interpreter_frame != NULL:
1455 // set up the method, locals, and monitors.
1456 // The frame interpreter_frame, if not NULL, is guaranteed to be the
1457 // right size, as determined by a previous call to this method.
1458 // It is also guaranteed to be walkable even though it is in a skeletal state
1459 //
1460 // is_top_frame == true:
1461 // We're processing the *oldest* interpreter frame!
1462 //
1463 // pop_frame_extra_args:
1464 // If this is != 0 we are returning to a deoptimized frame by popping
1465 // off the callee frame. We want to re-execute the call that called the
1466 // callee interpreted, but since the return to the interpreter would pop
1467 // the arguments off advance the esp by dummy popframe_extra_args slots.
1468 // Popping off those will establish the stack layout as it was before the call.
1469 //
1470 void AbstractInterpreter::layout_activation(Method* method,
1471 int tempcount,
1472 int popframe_extra_args,
1473 int moncount,
1474 int caller_actual_parameters,
1475 int callee_param_count,
1476 int callee_locals_count,
1477 frame* caller,
1478 frame* interpreter_frame,
1479 bool is_top_frame,
1480 bool is_bottom_frame) {
1481
1482 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) :
1483 (frame::abi_minframe_size / Interpreter::stackElementSize);
1484
1485 intptr_t* locals_base = (caller->is_interpreted_frame()) ?
1486 caller->interpreter_frame_esp() + caller_actual_parameters :
1487 caller->sp() + method->max_locals() - 1 + (frame::abi_minframe_size / Interpreter::stackElementSize) ;
1488
1489 intptr_t* monitor_base = caller->sp() - frame::ijava_state_size / Interpreter::stackElementSize ;
1490 intptr_t* monitor = monitor_base - (moncount * frame::interpreter_frame_monitor_size());
1491 intptr_t* esp_base = monitor - 1;
1492 intptr_t* esp = esp_base - tempcount - popframe_extra_args;
1493 intptr_t* sp = (intptr_t *) (((intptr_t) (esp_base - callee_locals_count + callee_param_count - method->max_stack()- abi_scratch)) & -StackAlignmentInBytes);
1494 intptr_t* sender_sp = caller->sp() + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize;
1495 intptr_t* top_frame_sp = is_top_frame ? sp : sp + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize;
1496
1497 interpreter_frame->interpreter_frame_set_method(method);
1498 interpreter_frame->interpreter_frame_set_locals(locals_base);
1499 interpreter_frame->interpreter_frame_set_cpcache(method->constants()->cache());
1500 interpreter_frame->interpreter_frame_set_esp(esp);
1501 interpreter_frame->interpreter_frame_set_monitor_end((BasicObjectLock *)monitor);
1502 interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp);
1503 if (!is_bottom_frame) {
1504 interpreter_frame->interpreter_frame_set_sender_sp(sender_sp);
1505 }
1506 }
1507
1508 // =============================================================================
1509 // Exceptions
1510
1511 void TemplateInterpreterGenerator::generate_throw_exception() {
1512 Register Rexception = R17_tos,
1513 Rcontinuation = R3_RET;
1514
1515 // --------------------------------------------------------------------------
1516 // Entry point if an method returns with a pending exception (rethrow).
1517 Interpreter::_rethrow_exception_entry = __ pc();
1518 {
1519 __ restore_interpreter_state(R11_scratch1); // Sets R11_scratch1 = fp.
1520 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1);
1521 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0);
1522
1523 // Compiled code destroys templateTableBase, reload.
1524 __ load_const_optimized(R25_templateTableBase, (address)Interpreter::dispatch_table((TosState)0), R11_scratch1);
1525 }
1526
1527 // Entry point if a interpreted method throws an exception (throw).
|
1386
1387 // Performance measurements show the 1word and 2word variants to be almost equivalent,
1388 // with very light advantages for the 1word variant. We chose the 1word variant for
1389 // code compactness.
1390 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, tc3);
1391
1392 // Restore caller sp for c2i case and return.
1393 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started.
1394 __ blr();
1395
1396 // Generate a vanilla native entry as the slow path.
1397 BLOCK_COMMENT("} CRC32_updateBytes(Buffer)");
1398 BIND(slow_path);
1399 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), R11_scratch1);
1400 return start;
1401 }
1402
1403 return NULL;
1404 }
1405
1406 // =============================================================================
1407 // Exceptions
1408
1409 void TemplateInterpreterGenerator::generate_throw_exception() {
1410 Register Rexception = R17_tos,
1411 Rcontinuation = R3_RET;
1412
1413 // --------------------------------------------------------------------------
1414 // Entry point if an method returns with a pending exception (rethrow).
1415 Interpreter::_rethrow_exception_entry = __ pc();
1416 {
1417 __ restore_interpreter_state(R11_scratch1); // Sets R11_scratch1 = fp.
1418 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1);
1419 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0);
1420
1421 // Compiled code destroys templateTableBase, reload.
1422 __ load_const_optimized(R25_templateTableBase, (address)Interpreter::dispatch_table((TosState)0), R11_scratch1);
1423 }
1424
1425 // Entry point if a interpreted method throws an exception (throw).
|