From c96f03a2507dd8445ee3abe2f81df919c4cc5e58 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Wed, 2 Jun 2010 12:58:06 -0500
Subject: [PATCH] ARM: Implement base classes for the saturation instructions.

---
 src/arch/arm/insts/misc.cc          | 23 +++++++++++++
 src/arch/arm/insts/misc.hh          | 36 ++++++++++++++++++++
 src/arch/arm/isa/templates/misc.isa | 51 +++++++++++++++++++++++++++++
 3 files changed, 110 insertions(+)

diff --git a/src/arch/arm/insts/misc.cc b/src/arch/arm/insts/misc.cc
index 3547c6712..0d68b7c2b 100644
--- a/src/arch/arm/insts/misc.cc
+++ b/src/arch/arm/insts/misc.cc
@@ -153,3 +153,26 @@ RevOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
     printReg(ss, op1);
     return ss.str();
 }
+
+std::string
+SatOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
+{
+    std::stringstream ss;
+    printMnemonic(ss);
+    printReg(ss, dest);
+    ccprintf(ss, ", #%d, ", satImm);
+    printReg(ss, op1);
+    return ss.str();
+}
+
+std::string
+SatShiftOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
+{
+    std::stringstream ss;
+    printMnemonic(ss);
+    printReg(ss, dest);
+    ccprintf(ss, ", #%d, ", satImm);
+    printShiftOperand(ss, op1, true, shiftAmt, INTREG_ZERO, shiftType);
+    printReg(ss, op1);
+    return ss.str();
+}
diff --git a/src/arch/arm/insts/misc.hh b/src/arch/arm/insts/misc.hh
index ae8d20e79..f4520478e 100644
--- a/src/arch/arm/insts/misc.hh
+++ b/src/arch/arm/insts/misc.hh
@@ -108,4 +108,40 @@ class RevOp : public PredOp
     std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
 };
 
+class SatOp : public PredOp
+{
+  protected:
+    IntRegIndex dest;
+    uint32_t satImm;
+    IntRegIndex op1;
+
+    SatOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
+          IntRegIndex _dest, uint32_t _satImm, IntRegIndex _op1) :
+        PredOp(mnem, _machInst, __opClass),
+        dest(_dest), satImm(_satImm), op1(_op1)
+    {}
+
+    std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
+};
+
+class SatShiftOp : public PredOp
+{
+  protected:
+    IntRegIndex dest;
+    uint32_t satImm;
+    IntRegIndex op1;
+    int32_t shiftAmt;
+    ArmShiftType shiftType;
+
+    SatShiftOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
+               IntRegIndex _dest, uint32_t _satImm, IntRegIndex _op1,
+               int32_t _shiftAmt, ArmShiftType _shiftType) :
+        PredOp(mnem, _machInst, __opClass),
+        dest(_dest), satImm(_satImm), op1(_op1),
+        shiftAmt(_shiftAmt), shiftType(_shiftType)
+    {}
+
+    std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
+};
+
 #endif
diff --git a/src/arch/arm/isa/templates/misc.isa b/src/arch/arm/isa/templates/misc.isa
index 566d0a8dd..82e9aeab7 100644
--- a/src/arch/arm/isa/templates/misc.isa
+++ b/src/arch/arm/isa/templates/misc.isa
@@ -119,3 +119,54 @@ def template RevOpConstructor {{
         %(constructor)s;
     }
 }};
+
+def template SatOpDeclare {{
+class %(class_name)s : public %(base_class)s
+{
+  protected:
+    public:
+        // Constructor
+        %(class_name)s(ExtMachInst machInst,
+                       IntRegIndex _dest, uint32_t _satImm, IntRegIndex _op1);
+        %(BasicExecDeclare)s
+};
+}};
+
+def template SatOpConstructor {{
+    inline %(class_name)s::%(class_name)s(ExtMachInst machInst,
+                                          IntRegIndex _dest,
+                                          uint32_t _satImm,
+                                          IntRegIndex _op1)
+        : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
+                         _dest, _satImm, _op1)
+    {
+        %(constructor)s;
+    }
+}};
+
+def template SatShiftOpDeclare {{
+class %(class_name)s : public %(base_class)s
+{
+  protected:
+    public:
+        // Constructor
+        %(class_name)s(ExtMachInst machInst,
+                       IntRegIndex _dest, uint32_t _satImm, IntRegIndex _op1,
+                       int32_t _shiftAmt, ArmShiftType _shiftType);
+        %(BasicExecDeclare)s
+};
+}};
+
+def template SatShiftOpConstructor {{
+    inline %(class_name)s::%(class_name)s(ExtMachInst machInst,
+                                          IntRegIndex _dest,
+                                          uint32_t _satImm,
+                                          IntRegIndex _op1,
+                                          int32_t _shiftAmt,
+                                          ArmShiftType _shiftType)
+        : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
+                         _dest, _satImm, _op1, _shiftAmt, _shiftType)
+    {
+        %(constructor)s;
+    }
+}};