X86: Reorganize segmentation and implement segment selector movs.

--HG--
extra : convert_revision : 553c3ffeda1f5312cf02493f602e7d4ba2fe66e8

1 files changed, 7 insertions, 1 deletions

diff --git a/src/arch/x86/isa/specialize.isa b/src/arch/x86/isa/specialize.isa
index 3802d8949..abf734307 100644
--- a/src/arch/x86/isa/specialize.isa
+++ b/src/arch/x86/isa/specialize.isa
@@ -154,12 +154,18 @@ let {{
             elif opType.tag == None or opType.size == None:
                 raise Exception, "Problem parsing operand tag: %s" % opType.tag
             elif opType.tag == "C":
+                # A control register indexed by the "reg" field
                 env.addReg(ModRMRegIndex)
                 Name += "_C"
             elif opType.tag == "D":
+                # A debug register indexed by the "reg" field
                 env.addReg(ModRMRegIndex)
                 Name += "_D"
-            elif opType.tag in ("G", "P", "S", "T", "V"):
+            elif opType.tag == "S":
+                # A segment selector register indexed by the "reg" field
+                env.addReg(ModRMRegIndex)
+                Name += "_S"
+            elif opType.tag in ("G", "P", "T", "V"):
                 # Use the "reg" field of the ModRM byte to select the register
                 env.addReg(ModRMRegIndex)
                 Name += "_R"