From 4f98171479c8b9f8544665a19520e279fcd30f5b Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Wed, 1 Jul 2009 22:11:54 -0700
Subject: ARM: Decode some media instructions. These are untested.

---
 src/arch/arm/isa/bitfields.isa |  2 ++
 src/arch/arm/isa/decoder.isa   | 54 ++++++++++++++++++++++++++++++++++++++++++
 src/arch/arm/types.hh          |  1 +
 3 files changed, 57 insertions(+)

diff --git a/src/arch/arm/isa/bitfields.isa b/src/arch/arm/isa/bitfields.isa
index 37b84e282..c9f15ff59 100644
--- a/src/arch/arm/isa/bitfields.isa
+++ b/src/arch/arm/isa/bitfields.isa
@@ -37,6 +37,8 @@
 def bitfield ENCODING      encoding;
 def bitfield OPCODE        opcode;
 def bitfield OPCODE_24_23  opcode24_23;
+def bitfield MEDIA_OPCODE  mediaOpcode;
+def bitfield MEDIA_OPCODE2 mediaOpcode2;
 def bitfield OPCODE_24	   opcode24;
 def bitfield OPCODE_23_20  opcode23_20;
 def bitfield OPCODE_23_21  opcode23_21;
diff --git a/src/arch/arm/isa/decoder.isa b/src/arch/arm/isa/decoder.isa
index c43a550a7..e0715312b 100644
--- a/src/arch/arm/isa/decoder.isa
+++ b/src/arch/arm/isa/decoder.isa
@@ -566,6 +566,60 @@ format DataOp {
                     Rn = Rn + Rm_Imm; }},
                  {{ EA = Rn + Rm_Imm; }});
         }
+        1: decode MEDIA_OPCODE {
+            0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7: WarnUnimpl::parallel_add_subtract_instructions();
+            0x8: decode MISC_OPCODE {
+                0x1, 0x9: WarnUnimpl::pkhbt();
+                0x7: WarnUnimpl::sxtab16();
+                0xb: WarnUnimpl::sel();
+                0x5, 0xd: WarnUnimpl::pkhtb();
+                0x3: WarnUnimpl::sign_zero_extend_add();
+            }
+            0xa, 0xb: decode SHIFT {
+                0x0, 0x2: WarnUnimpl::ssat();
+                0x1: WarnUnimpl::ssat16();
+            }
+            0xe, 0xf: decode SHIFT {
+                0x0, 0x2: WarnUnimpl::usat();
+                0x1: WarnUnimpl::usat16();
+            }
+            0x10: decode RN {
+                0xf: decode MISC_OPCODE {
+                    0x1: WarnUnimpl::smuad();
+                    0x3: WarnUnimpl::smuadx();
+                    0x5: WarnUnimpl::smusd();
+                    0x7: WarnUnimpl::smusdx();
+                }
+                default: decode MISC_OPCODE {
+                    0x1: WarnUnimpl::smlad();
+                    0x3: WarnUnimpl::smladx();
+                    0x5: WarnUnimpl::smlsd();
+                    0x7: WarnUnimpl::smlsdx();
+                }
+            }
+            0x14: decode MISC_OPCODE {
+                0x1: WarnUnimpl::smlald();
+                0x3: WarnUnimpl::smlaldx();
+                0x5: WarnUnimpl::smlsld();
+                0x7: WarnUnimpl::smlsldx();
+            }
+            0x15: decode RN {
+                0xf: decode MISC_OPCODE {
+                    0x1: WarnUnimpl::smmul();
+                    0x3: WarnUnimpl::smmulr();
+                }
+                default: decode MISC_OPCODE {
+                    0x1: WarnUnimpl::smmla();
+                    0x3: WarnUnimpl::smmlar();
+                    0xd: WarnUnimpl::smmls();
+                    0xf: WarnUnimpl::smmlsr();
+                }
+            }
+            0x18: decode RN {
+                0xf: WarnUnimpl::usada8();
+                default: WarnUnimpl::usad8();
+            }
+        }
     }
     0x4: decode PUSWL {
         // Right now we only handle cases when S (PSRUSER) is not set
diff --git a/src/arch/arm/types.hh b/src/arch/arm/types.hh
index cff6b123c..707d7d0f6 100644
--- a/src/arch/arm/types.hh
+++ b/src/arch/arm/types.hh
@@ -46,6 +46,7 @@ namespace ArmISA
         // All the different types of opcode fields.
         Bitfield<27, 25> encoding;
         Bitfield<24, 21> opcode;
+        Bitfield<24, 20> mediaOpcode;
         Bitfield<24, 23> opcode24_23;
         Bitfield<24>     opcode24;
         Bitfield<23, 20> opcode23_20;
-- 
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