arm: Add support for ARMv8 (AArch64 & AArch32)

[gem5.git] / src / arch / arm / insts / pred_inst.hh

diff --git a/src/arch/arm/insts/pred_inst.hh b/src/arch/arm/insts/pred_inst.hh
index c441d1f32bfc418766c2714c7be6fe9fdfdb00eb..c5e2ab386190d40cf096f0d2303e91993ce50f05 100644 (file)
--- 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;
     }
 };