From d4a03f19009b9a537d99d54620784d441f9c3a92 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Sun, 21 Jun 2009 17:21:25 -0700
Subject: ARM: Simplify the ISA desc by pulling some classes out of it.

---
 src/arch/arm/insts/mem.hh | 109 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 src/arch/arm/insts/mem.hh

(limited to 'src/arch/arm/insts/mem.hh')

diff --git a/src/arch/arm/insts/mem.hh b/src/arch/arm/insts/mem.hh
new file mode 100644
index 000000000..80f966e9c
--- /dev/null
+++ b/src/arch/arm/insts/mem.hh
@@ -0,0 +1,109 @@
+/* Copyright (c) 2007-2008 The Florida State University
+ * 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: Stephen Hines
+ */
+#ifndef __ARCH_ARM_MEM_HH__
+#define __ARCH_ARM_MEM_HH__
+
+#include "arch/arm/insts/pred_inst.hh"
+
+namespace ArmISA
+{
+/**
+ * Base class for general Arm memory-format instructions.
+ */
+class Memory : public PredOp
+{
+  protected:
+
+    /// Memory request flags.  See mem_req_base.hh.
+    unsigned memAccessFlags;
+    /// Pointer to EAComp object.
+    const StaticInstPtr eaCompPtr;
+    /// Pointer to MemAcc object.
+    const StaticInstPtr memAccPtr;
+
+    /// Displacement for EA calculation (signed).
+    int32_t disp;
+    int32_t disp8;
+    int32_t up;
+    int32_t hilo,
+            shift_size,
+            shift;
+
+    /// Constructor
+    Memory(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
+           StaticInstPtr _eaCompPtr = nullStaticInstPtr,
+           StaticInstPtr _memAccPtr = nullStaticInstPtr)
+        : PredOp(mnem, _machInst, __opClass),
+                 memAccessFlags(0),
+                 eaCompPtr(_eaCompPtr), memAccPtr(_memAccPtr),
+                 disp(machInst.immed11_0),
+                 disp8(machInst.immed7_0 << 2),
+                 up(machInst.puswl.up),
+                 hilo((machInst.immedHi11_8 << 4) | machInst.immedLo3_0),
+                 shift_size(machInst.shiftSize), shift(machInst.shift)
+    {
+        // When Up is not set, then we must subtract by the displacement
+        if (!up)
+        {
+            disp = -disp;
+            disp8 = -disp8;
+            hilo = -hilo;
+        }
+    }
+
+    std::string
+    generateDisassembly(Addr pc, const SymbolTable *symtab) const;
+
+  public:
+
+    const StaticInstPtr &eaCompInst() const { return eaCompPtr; }
+    const StaticInstPtr &memAccInst() const { return memAccPtr; }
+};
+
+ /**
+ * Base class for a few miscellaneous memory-format insts
+ * that don't interpret the disp field
+ */
+class MemoryNoDisp : public Memory
+{
+  protected:
+    /// Constructor
+    MemoryNoDisp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
+                 StaticInstPtr _eaCompPtr = nullStaticInstPtr,
+                 StaticInstPtr _memAccPtr = nullStaticInstPtr)
+        : Memory(mnem, _machInst, __opClass, _eaCompPtr, _memAccPtr)
+    {
+    }
+
+    std::string
+    generateDisassembly(Addr pc, const SymbolTable *symtab) const;
+};
+}
+
+#endif //__ARCH_ARM_INSTS_MEM_HH__
-- 
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