X86: Implement and hook up STI and CLI instructions.

src/arch/x86/isa/decoder/one_byte_opcodes.isa

@@ -553,8 +553,8 @@
         0x1F: decode OPCODE_OP_BOTTOM3 {
             0x0: CLC();
             0x1: STC();
-            0x2: WarnUnimpl::cli();
-            0x3: WarnUnimpl::sti();
+            0x2: CLI();
+            0x3: STI();
             0x4: CLD();
             0x5: STD();
             //0x6: group4();

src/arch/x86/isa/insts/general_purpose/flags/set_and_clear.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2007 The Hewlett-Packard Development Company
+# Copyright (c) 2007-2008 The Hewlett-Packard Development Company
 # All rights reserved.
 #
 # Redistribution and use of this software in source and binary forms,
@@ -84,10 +84,18 @@ def macroop CMC {
     ruflags t1
     wruflagsi t1, "CFBit"
 };
+
+def macroop STI {
+    rflags t1
+    limm t2, "IFBit"
+    or t1, t1, t2
+    wrflags t1, t0
+};
+
+def macroop CLI {
+    rflags t1
+    limm t2, "~IFBit"
+    and t1, t1, t2
+    wrflags t1, t0
+};
 '''
-#let {{
-#    class CLI(Inst):
-#	"GenFault ${new UnimpInstFault}"
-#    class STI(Inst):
-#	"GenFault ${new UnimpInstFault}"
-#}};