797       assert(left->is_fpu_register(), "must be");
 798       assert(res->is_fpu_register(), "must be");
 799       assert(op2->tmp1_opr()->is_fpu_register(), "must be");
 800 
 801       insert_free_if_dead(op2->tmp1_opr());
 802       insert_free_if_dead(res, left);
 803       insert_exchange(left);
 804       do_rename(left, res);
 805 
 806       new_left = to_fpu_stack_top(res);
 807       new_res = new_left;
 808 
 809       op2->set_fpu_stack_size(sim()->stack_size());
 810       assert(sim()->stack_size() <= 7, "at least one stack slot must be free");
 811       break;
 812     }
 813 
 814 
 815     case lir_tan:
 816     case lir_sin:
 817     case lir_cos:
 818     case lir_exp: {
 819       // sin, cos and exp need two temporary fpu stack slots, so there are two temporary
 820       // registers (stored in right and temp of the operation).
 821       // the stack allocator must guarantee that the stack slots are really free,
 822       // otherwise there might be a stack overflow.
 823       assert(left->is_fpu_register(), "must be");
 824       assert(res->is_fpu_register(), "must be");
 825       // assert(left->is_last_use(), "old value gets destroyed");
 826       assert(right->is_fpu_register(), "right is used as the first temporary register");
 827       assert(op2->tmp1_opr()->is_fpu_register(), "temp is used as the second temporary register");
 828       assert(fpu_num(left) != fpu_num(right) && fpu_num(right) != fpu_num(op2->tmp1_opr()) && fpu_num(op2->tmp1_opr()) != fpu_num(res), "need distinct temp registers");
 829 
 830       insert_free_if_dead(right);
 831       insert_free_if_dead(op2->tmp1_opr());
 832 
 833       insert_free_if_dead(res, left);
 834       insert_exchange(left);
 835       do_rename(left, res);
 836 
 837       new_left = to_fpu_stack_top(res);
 838       new_res = new_left;

 797       assert(left->is_fpu_register(), "must be");
 798       assert(res->is_fpu_register(), "must be");
 799       assert(op2->tmp1_opr()->is_fpu_register(), "must be");
 800 
 801       insert_free_if_dead(op2->tmp1_opr());
 802       insert_free_if_dead(res, left);
 803       insert_exchange(left);
 804       do_rename(left, res);
 805 
 806       new_left = to_fpu_stack_top(res);
 807       new_res = new_left;
 808 
 809       op2->set_fpu_stack_size(sim()->stack_size());
 810       assert(sim()->stack_size() <= 7, "at least one stack slot must be free");
 811       break;
 812     }
 813 
 814 
 815     case lir_tan:
 816     case lir_sin:
 817     case lir_cos: {

 818       // sin, cos and exp need two temporary fpu stack slots, so there are two temporary
 819       // registers (stored in right and temp of the operation).
 820       // the stack allocator must guarantee that the stack slots are really free,
 821       // otherwise there might be a stack overflow.
 822       assert(left->is_fpu_register(), "must be");
 823       assert(res->is_fpu_register(), "must be");
 824       // assert(left->is_last_use(), "old value gets destroyed");
 825       assert(right->is_fpu_register(), "right is used as the first temporary register");
 826       assert(op2->tmp1_opr()->is_fpu_register(), "temp is used as the second temporary register");
 827       assert(fpu_num(left) != fpu_num(right) && fpu_num(right) != fpu_num(op2->tmp1_opr()) && fpu_num(op2->tmp1_opr()) != fpu_num(res), "need distinct temp registers");
 828 
 829       insert_free_if_dead(right);
 830       insert_free_if_dead(op2->tmp1_opr());
 831 
 832       insert_free_if_dead(res, left);
 833       insert_exchange(left);
 834       do_rename(left, res);
 835 
 836       new_left = to_fpu_stack_top(res);
 837       new_res = new_left;