Power: Provide a utility function to copy registers from one thread context

to another in the Power ISA.

src/arch/power/SConscript

@@ -42,6 +42,7 @@ if env['TARGET_ISA'] == 'power':
     Source('insts/static_inst.cc')
     Source('pagetable.cc')
     Source('tlb.cc')
+    Source('utility.cc')
 
     SimObject('PowerTLB.py')
     TraceFlag('Power')

src/arch/power/utility.cc

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * Copyright (c) 2007-2008 The Florida State University
+ * Copyright (c) 2009 The University of Edinburgh
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Korey Sewell
+ *          Stephen Hines
+ *          Timothy M. Jones
+ */
+
+#include "arch/power/utility.hh"
+
+namespace PowerISA {
+
+void
+copyRegs(ThreadContext *src, ThreadContext *dest)
+{
+    // First loop through the integer registers.
+    for (int i = 0; i < NumIntRegs; ++i)
+        dest->setIntReg(i, src->readIntReg(i));
+
+    // Then loop through the floating point registers.
+    for (int i = 0; i < NumFloatRegs; ++i)
+        dest->setFloatRegBits(i, src->readFloatRegBits(i));
+
+    // Copy misc. registers
+    copyMiscRegs(src, dest);
+
+    // Lastly copy PC/NPC
+    dest->setPC(src->readPC());
+    dest->setNextPC(src->readNextPC());
+}
+
+} // PowerISA namespace

src/arch/power/utility.hh

@@ -101,16 +101,12 @@ checkFpEnableFault(XC *xc)
     return NoFault;
 }
 
-static inline void
-copyRegs(ThreadContext *src, ThreadContext *dest)
-{
-    panic("Copy Regs Not Implemented Yet\n");
-}
+void
+copyRegs(ThreadContext *src, ThreadContext *dest);
 
 static inline void
 copyMiscRegs(ThreadContext *src, ThreadContext *dest)
 {
-    panic("Copy Misc. Regs Not Implemented Yet\n");
 }
 
 } // PowerISA namespace