arm: Add support for ARMv8 (AArch64 & AArch32)

Note: AArch64 and AArch32 interworking is not supported. If you use an AArch64
kernel you are restricted to AArch64 user-mode binaries. This will be addressed
in a later patch.

Note: Virtualization is only supported in AArch32 mode. This will also be fixed
in a later patch.

Contributors:
Giacomo Gabrielli    (TrustZone, LPAE, system-level AArch64, AArch64 NEON, validation)
Thomas Grocutt       (AArch32 Virtualization, AArch64 FP, validation)
Mbou Eyole           (AArch64 NEON, validation)
Ali Saidi            (AArch64 Linux support, code integration, validation)
Edmund Grimley-Evans (AArch64 FP)
William Wang         (AArch64 Linux support)
Rene De Jong         (AArch64 Linux support, performance opt.)
Matt Horsnell        (AArch64 MP, validation)
Matt Evans           (device models, code integration, validation)
Chris Adeniyi-Jones  (AArch64 syscall-emulation)
Prakash Ramrakhyani  (validation)
Dam Sunwoo           (validation)
Chander Sudanthi     (validation)
Stephan Diestelhorst (validation)
Andreas Hansson      (code integration, performance opt.)
Eric Van Hensbergen  (performance opt.)
Gabe Black

1 files changed, 24 insertions, 12 deletions

diff --git a/src/arch/arm/insts/pred_inst.hh b/src/arch/arm/insts/pred_inst.hh
index c441d1f32..c5e2ab386 100644
--- a/src/arch/arm/insts/pred_inst.hh
+++ b/src/arch/arm/insts/pred_inst.hh
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 ARM Limited
+ * Copyright (c) 2010, 2012-2013 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -78,7 +78,8 @@ modified_imm(uint8_t ctrlImm, uint8_t dataImm)
 }
 
 static inline uint64_t
-simd_modified_imm(bool op, uint8_t cmode, uint8_t data, bool &immValid)
+simd_modified_imm(bool op, uint8_t cmode, uint8_t data, bool &immValid,
+                  bool isAarch64 = false)
 {
     uint64_t bigData = data;
     immValid = true;
@@ -133,12 +134,20 @@ simd_modified_imm(bool op, uint8_t cmode, uint8_t data, bool &immValid)
         }
         break;
       case 0xf:
-        if (!op) {
-            uint64_t bVal = bits(bigData, 6) ? (0x1F) : (0x20);
-            bigData = (bits(bigData, 5, 0) << 19) |
-                      (bVal << 25) | (bits(bigData, 7) << 31);
-            bigData |= (bigData << 32);
-            break;
+        {
+            uint64_t bVal = 0;
+            if (!op) {
+                bVal = bits(bigData, 6) ? (0x1F) : (0x20);
+                bigData = (bits(bigData, 5, 0) << 19) |
+                          (bVal << 25) | (bits(bigData, 7) << 31);
+                bigData |= (bigData << 32);
+                break;
+            } else if (isAarch64) {
+                bVal = bits(bigData, 6) ? (0x0FF) : (0x100);
+                bigData = (bits(bigData, 5, 0) << 48) |
+                          (bVal << 54) | (bits(bigData, 7) << 63);
+                break;
+            }
         }
         // Fall through, immediate encoding is invalid.
       default:
@@ -179,11 +188,14 @@ class PredOp : public ArmStaticInst
 
     /// Constructor
     PredOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
-           ArmStaticInst(mnem, _machInst, __opClass),
-           condCode(machInst.itstateMask ?
-                   (ConditionCode)(uint8_t)machInst.itstateCond :
-                   (ConditionCode)(unsigned)machInst.condCode)
+           ArmStaticInst(mnem, _machInst, __opClass)
     {
+        if (machInst.aarch64)
+            condCode = COND_UC;
+        else if (machInst.itstateMask)
+            condCode = (ConditionCode)(uint8_t)machInst.itstateCond;
+        else
+            condCode = (ConditionCode)(unsigned)machInst.condCode;
     }
 };