1.1 --- a/src/cpu/x86/vm/c1_LinearScan_x86.cpp Mon Aug 31 08:31:45 2009 -0700
1.2 +++ b/src/cpu/x86/vm/c1_LinearScan_x86.cpp Mon Aug 31 17:07:53 2009 -0700
1.3 @@ -764,8 +764,6 @@
1.4 break;
1.5 }
1.6
1.7 - case lir_log:
1.8 - case lir_log10:
1.9 case lir_abs:
1.10 case lir_sqrt: {
1.11 // Right argument appears to be unused
1.12 @@ -785,6 +783,30 @@
1.13 break;
1.14 }
1.15
1.16 + case lir_log:
1.17 + case lir_log10: {
1.18 + // log and log10 needs one temporary fpu stack slot, so there is ontemporary
1.19 + // registers stored in temp of the operation.
1.20 + // the stack allocator must guarantee that the stack slots are really free,
1.21 + // otherwise there might be a stack overflow.
1.22 + assert(right->is_illegal(), "must be");
1.23 + assert(left->is_fpu_register(), "must be");
1.24 + assert(res->is_fpu_register(), "must be");
1.25 + assert(op2->tmp_opr()->is_fpu_register(), "must be");
1.26 +
1.27 + insert_free_if_dead(op2->tmp_opr());
1.28 + insert_free_if_dead(res, left);
1.29 + insert_exchange(left);
1.30 + do_rename(left, res);
1.31 +
1.32 + new_left = to_fpu_stack_top(res);
1.33 + new_res = new_left;
1.34 +
1.35 + op2->set_fpu_stack_size(sim()->stack_size());
1.36 + assert(sim()->stack_size() <= 7, "at least one stack slot must be free");
1.37 + break;
1.38 + }
1.39 +
1.40
1.41 case lir_tan:
1.42 case lir_sin:
