6353 if (reg->is_stack()) {
6354 // Update source stack location by adding stack increment
6355 reg = VMRegImpl::stack2reg(reg->reg2stack() + sp_inc/VMRegImpl::stack_slot_size);
6356 regs[i] = reg;
6357 }
6358 assert(reg->value() >= 0 && reg->value() < max_reg, "reg value out of bounds");
6359 reg_state[reg->value()] = MacroAssembler::reg_readonly;
6360 }
6361 if (is_packing) {
6362 // The reserved entries are not used by the packed args, so make them writable
6363 mark_reserved_entries_writable(sig_cc, regs, num_regs, reg_state);
6364 }
6365
6366 return reg_state;
6367 }
6368
6369 int MacroAssembler::shuffle_value_args(bool is_packing, bool receiver_only, int extra_stack_offset,
6370 BasicType* sig_bt, const GrowableArray<SigEntry>* sig_cc,
6371 int args_passed, int args_on_stack, VMRegPair* regs, // from
6372 int args_passed_to, int args_on_stack_to, VMRegPair* regs_to) { // to
6373 // Check if we need to extend the stack for unpacking
6374 int sp_inc = (args_on_stack_to - args_on_stack) * VMRegImpl::stack_slot_size;
6375 if (sp_inc > 0) {
6376 // Save the return address, adjust the stack (make sure it is properly
6377 // 16-byte aligned) and copy the return address to the new top of the stack.
6378 pop(r13);
6379 sp_inc = align_up(sp_inc, StackAlignmentInBytes);
6380 subptr(rsp, sp_inc);
6381 push(r13);
6382 } else {
6383 // The scalarized calling convention needs less stack space than the unscalarized one.
6384 // No need to extend the stack, the caller will take care of these adjustments.
6385 sp_inc = 0;
6386 }
6387
6388 int ret_off; // make sure we don't overwrite the return address
6389 if (is_packing) {
6390 // For C1 code, the VVEP doesn't have reserved slots, so we store the returned address at
6391 // rsp[0] during shuffling.
6392 ret_off = 0;
6393 } else {
6394 // C2 code ensures that sp_inc is a reserved slot.
6395 ret_off = sp_inc;
6396 }
6397
6398 int max_stack = MAX2(args_on_stack + sp_inc/VMRegImpl::stack_slot_size, args_on_stack_to);
6399 RegState* reg_state = init_reg_state(is_packing, sig_cc, regs, args_passed, sp_inc, max_stack);
6400
6401 // Emit code for packing/unpacking value type arguments
|
6353 if (reg->is_stack()) {
6354 // Update source stack location by adding stack increment
6355 reg = VMRegImpl::stack2reg(reg->reg2stack() + sp_inc/VMRegImpl::stack_slot_size);
6356 regs[i] = reg;
6357 }
6358 assert(reg->value() >= 0 && reg->value() < max_reg, "reg value out of bounds");
6359 reg_state[reg->value()] = MacroAssembler::reg_readonly;
6360 }
6361 if (is_packing) {
6362 // The reserved entries are not used by the packed args, so make them writable
6363 mark_reserved_entries_writable(sig_cc, regs, num_regs, reg_state);
6364 }
6365
6366 return reg_state;
6367 }
6368
6369 int MacroAssembler::shuffle_value_args(bool is_packing, bool receiver_only, int extra_stack_offset,
6370 BasicType* sig_bt, const GrowableArray<SigEntry>* sig_cc,
6371 int args_passed, int args_on_stack, VMRegPair* regs, // from
6372 int args_passed_to, int args_on_stack_to, VMRegPair* regs_to) { // to
6373 // Check if we need to extend the stack for packing/unpacking
6374 int sp_inc = (args_on_stack_to - args_on_stack) * VMRegImpl::stack_slot_size;
6375 if (sp_inc > 0) {
6376 sp_inc = align_up(sp_inc, StackAlignmentInBytes);
6377 if (!is_packing) {
6378 // Save the return address, adjust the stack (make sure it is properly
6379 // 16-byte aligned) and copy the return address to the new top of the stack.
6380 // (Note: C1 does this in C1_MacroAssembler::scalarized_entry).
6381 pop(r13);
6382 subptr(rsp, sp_inc);
6383 push(r13);
6384 }
6385 } else {
6386 // The scalarized calling convention needs less stack space than the unscalarized one.
6387 // No need to extend the stack, the caller will take care of these adjustments.
6388 sp_inc = 0;
6389 }
6390
6391 int ret_off; // make sure we don't overwrite the return address
6392 if (is_packing) {
6393 // For C1 code, the VVEP doesn't have reserved slots, so we store the returned address at
6394 // rsp[0] during shuffling.
6395 ret_off = 0;
6396 } else {
6397 // C2 code ensures that sp_inc is a reserved slot.
6398 ret_off = sp_inc;
6399 }
6400
6401 int max_stack = MAX2(args_on_stack + sp_inc/VMRegImpl::stack_slot_size, args_on_stack_to);
6402 RegState* reg_state = init_reg_state(is_packing, sig_cc, regs, args_passed, sp_inc, max_stack);
6403
6404 // Emit code for packing/unpacking value type arguments
|