1 files changed, 53 insertions, 0 deletions
diff --git a/tool/ruby_vm/views/_insn_stack_increase.erb b/tool/ruby_vm/views/_insn_stack_increase.erb
new file mode 100644
index 0000000000..566e06c95e
--- /dev/null
+++ b/tool/ruby_vm/views/_insn_stack_increase.erb
@@ -0,0 +1,53 @@
+%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
+%#
+%# This file is a part of  the programming language Ruby.  Permission is hereby
+%# granted, to either  redistribute and/or modify this file,  provided that the
+%# conditions mentioned  in the  file COPYING  are met.   Consult the  file for
+%# details.
+%#
+PUREFUNC(MAYBE_UNUSED(static int insn_stack_increase(int depth, int insn, const VALUE *opes)));
+PUREFUNC(static rb_snum_t insn_stack_increase_dispatch(enum ruby_vminsn_type insn, const VALUE *opes));
+
+rb_snum_t
+insn_stack_increase_dispatch(enum ruby_vminsn_type insn, const VALUE *opes)
+{
+    static const signed char t[] = {
+% RubyVM::Instructions.each_slice 8 do |a|
+        <%= a.map { |i|
+          if i.has_attribute?('sp_inc')
+            '-127'
+          else
+            sprintf("%4d", i.rets.size - i.pops.size)
+          end
+        }.join(', ') -%>,
+% end
+    };
+    char c = t[insn];
+
+    ASSERT_VM_INSTRUCTION_SIZE(t);
+    if (c != -127) {
+        return c;
+    }
+    else switch(insn) {
+    default:
+        UNREACHABLE;
+% RubyVM::Instructions.each do |i|
+%   next unless i.has_attribute?('sp_inc')
+    case <%= i.bin %>:
+        return CALL_ATTRIBUTE(sp_inc, <%= i.name %><%=
+          i.opes.map.with_index do |v, j|
+            k = i.cast_from_VALUE v, "opes[#{j}]"
+            next ", #{k}"
+          end.join
+        %>);
+% end
+    }
+}
+
+int
+insn_stack_increase(int depth, int insn, const VALUE *opes)
+{
+    enum ruby_vminsn_type itype = (enum ruby_vminsn_type)insn;
+    return depth + (int)insn_stack_increase_dispatch(itype, opes);
+}