1 files changed, 132 insertions, 3 deletions

diff --git a/cpu/beta_cpu/alpha_dyn_inst.hh b/cpu/beta_cpu/alpha_dyn_inst.hh
index 584e027d7..b2f0d703e 100644
--- a/cpu/beta_cpu/alpha_dyn_inst.hh
+++ b/cpu/beta_cpu/alpha_dyn_inst.hh
@@ -47,11 +47,11 @@ class AlphaDynInst : public BaseDynInst<Impl>
     /** BaseDynInst constructor given a static inst pointer. */
     AlphaDynInst(StaticInstPtr<AlphaISA> &_staticInst);
 
-    /** Executes the instruction. */
+    /** Executes the instruction.  Why the hell did I put this here? */
     Fault execute()
     {
-        fault = staticInst->execute(this, traceData);
-        return fault;
+        this->fault = this->staticInst->execute(this, this->traceData);
+        return this->fault;
     }
 
   public:
@@ -74,6 +74,135 @@ class AlphaDynInst : public BaseDynInst<Impl>
     void syscall();
 #endif
 
+
+
+  private:
+    /** Physical register index of the destination registers of this
+     *  instruction.
+     */
+    PhysRegIndex _destRegIdx[MaxInstDestRegs];
+
+    /** Physical register index of the source registers of this
+     *  instruction.
+     */
+    PhysRegIndex _srcRegIdx[MaxInstSrcRegs];
+
+    /** Physical register index of the previous producers of the
+     *  architected destinations.
+     */
+    PhysRegIndex _prevDestRegIdx[MaxInstDestRegs];
+
+  public:
+
+    // The register accessor methods provide the index of the
+    // instruction's operand (e.g., 0 or 1), not the architectural
+    // register index, to simplify the implementation of register
+    // renaming.  We find the architectural register index by indexing
+    // into the instruction's own operand index table.  Note that a
+    // raw pointer to the StaticInst is provided instead of a
+    // ref-counted StaticInstPtr to redice overhead.  This is fine as
+    // long as these methods don't copy the pointer into any long-term
+    // storage (which is pretty hard to imagine they would have reason
+    // to do).
+
+    uint64_t readIntReg(StaticInst<ISA> *si, int idx)
+    {
+        return this->cpu->readIntReg(_srcRegIdx[idx]);
+    }
+
+    float readFloatRegSingle(StaticInst<ISA> *si, int idx)
+    {
+        return this->cpu->readFloatRegSingle(_srcRegIdx[idx]);
+    }
+
+    double readFloatRegDouble(StaticInst<ISA> *si, int idx)
+    {
+        return this->cpu->readFloatRegDouble(_srcRegIdx[idx]);
+    }
+
+    uint64_t readFloatRegInt(StaticInst<ISA> *si, int idx)
+    {
+        return this->cpu->readFloatRegInt(_srcRegIdx[idx]);
+    }
+    /** @todo: Make results into arrays so they can handle multiple dest
+     *  registers.
+     */
+    void setIntReg(StaticInst<ISA> *si, int idx, uint64_t val)
+    {
+        this->cpu->setIntReg(_destRegIdx[idx], val);
+        this->instResult.integer = val;
+    }
+
+    void setFloatRegSingle(StaticInst<ISA> *si, int idx, float val)
+    {
+        this->cpu->setFloatRegSingle(_destRegIdx[idx], val);
+        this->instResult.fp = val;
+    }
+
+    void setFloatRegDouble(StaticInst<ISA> *si, int idx, double val)
+    {
+        this->cpu->setFloatRegDouble(_destRegIdx[idx], val);
+        this->instResult.dbl = val;
+    }
+
+    void setFloatRegInt(StaticInst<ISA> *si, int idx, uint64_t val)
+    {
+        this->cpu->setFloatRegInt(_destRegIdx[idx], val);
+        this->instResult.integer = val;
+    }
+
+    /** Returns the physical register index of the i'th destination
+     *  register.
+     */
+    PhysRegIndex renamedDestRegIdx(int idx) const
+    {
+        return _destRegIdx[idx];
+    }
+
+    /** Returns the physical register index of the i'th source register. */
+    PhysRegIndex renamedSrcRegIdx(int idx) const
+    {
+        return _srcRegIdx[idx];
+    }
+
+    /** Returns the physical register index of the previous physical register
+     *  that remapped to the same logical register index.
+     */
+    PhysRegIndex prevDestRegIdx(int idx) const
+    {
+        return _prevDestRegIdx[idx];
+    }
+
+    /** Renames a destination register to a physical register.  Also records
+     *  the previous physical register that the logical register mapped to.
+     */
+    void renameDestReg(int idx,
+                       PhysRegIndex renamed_dest,
+                       PhysRegIndex previous_rename)
+    {
+        _destRegIdx[idx] = renamed_dest;
+        _prevDestRegIdx[idx] = previous_rename;
+    }
+
+    /** Renames a source logical register to the physical register which
+     *  has/will produce that logical register's result.
+     *  @todo: add in whether or not the source register is ready.
+     */
+    void renameSrcReg(int idx, PhysRegIndex renamed_src)
+    {
+        _srcRegIdx[idx] = renamed_src;
+    }
+
+  public:
+    Fault calcEA()
+    {
+        return this->staticInst->eaCompInst()->execute(this, this->traceData);
+    }
+
+    Fault memAccess()
+    {
+        return this->staticInst->memAccInst()->execute(this, this->traceData);
+    }
 };
 
 #endif // __CPU_BETA_CPU_ALPHA_DYN_INST_HH__