Instruction decode generator taken from the PowerPC simulator

and being made more generic.

1 files changed, 68 insertions, 0 deletions

diff --git a/sim/igen/gen-icache.h b/sim/igen/gen-icache.h
new file mode 100644
index 0000000..c5ba71f
--- /dev/null
+++ b/sim/igen/gen-icache.h
@@ -0,0 +1,68 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+ 
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ 
+    */
+
+
+
+/* Output code to manipulate the instruction cache: either create it
+   or reference it */
+
+typedef enum {
+  declare_variables,
+  define_variables,
+  undef_variables,
+} icache_decl_type;
+
+typedef enum {
+  do_not_use_icache = 0,
+  get_values_from_icache = 0x1,
+  put_values_in_icache = 0x2,
+  both_values_and_icache = 0x3,
+} icache_body_type;
+
+extern void print_icache_body
+(lf *file,
+ insn *instruction,
+ insn_bits *expanded_bits,
+ cache_table *cache_rules,
+ icache_decl_type what_to_declare,
+ icache_body_type what_to_do);
+
+
+/* Output an instruction cache decode function */
+
+extern insn_handler print_icache_declaration;
+extern insn_handler print_icache_definition;
+
+
+/* Output an instruction cache support function */
+
+extern function_handler print_icache_internal_function_declaration;
+extern function_handler print_icache_internal_function_definition;
+
+
+/* Output the instruction cache table data structure */
+
+extern void print_icache_struct
+(insn_table *instructions,
+ cache_table *cache_rules,
+ lf *file);
+
+
+/* Output a single instructions decoder */